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bass fishing queensland
bass fishing queensland
Demersal Fish
Types
Demersal fish can be divided into two main types: benthic fish which rest on the sea floor, and benthopelagic fish which float in the water column just above the sea floor.
Benthopelagic fish have neutral buoyancy, so they can float at depth without much effort, while benthic fish are more dense, with negative buoyancy so they can lie on the bottom without any effort. Most demersal fish are benthopelagic.
As with other bottom feeders, a mechanism to deal with substrate is often necessary. With demersal fish the sand is usually pumped out of the mouth through the gill slit. Most demersal fish exhibit a flat ventral region so as to more easily rest their body on the substrate. The exception may be the flatfish, which are laterally depressed but lie on their sides. Also, many exhibit what is termed an “inferior” mouth, which means that the mouth is pointed downwards; this is beneficial as their food is often going to be below them in the substrate. Those bottom feeders with upward-pointing mouths, such as stargazers, tend to seize swimming prey.
Benthic fish
Benthic fish, sometimes called groundfish, are denser than water, so they can rest on the sea floor. They either lie-and-wait as ambush predators, maybe covering themselves with sand or otherwise camouflaging themselves, or move actively over the bottom in search for food. Benthic fish which can bury themselves include flatfish and stingrays.
Flatfish are an order of ray-finned benthic fishes which lie flat on the ocean floor. Examples are flounder, sole, turbot, plaice, and halibut. The adult fish of many species have both eyes on one side of the head. When the fish hatches, one eye is located on each side of its head. But as the fish grows from the larval stage, one eye migrates to the other side of the body as a process of metamorphosis. The flatfish then changes its habits, and camouflages itself by lying on the bottom of the ocean floor with both eyes facing upwards. The side on which the eye migrates depends on the species, so some species end up with both eyes on their left side, and others on the right.
Flounder have both eyes on one side of their head.
Some flatfish can camouflage themselves on the ocean floor.
Bluespotted ribbontail rays migrate in schools onto shallow sands to feed on mollusks, shrimps, crabs and worms.
The great hammerhead detects the electrical signatures of stingrays buried in the sand and pins them with its “hammer”.
Flounder ambush their prey, feeding at soft muddy area of the sea bottom, near bridge piles, docks, artificial and coral reefs. Their diet consists mainly of fish spawn, crustaceans, polychaetes and small fish.
The great hammerhead swings its head in broad angles over the sea floor to pick up the electrical signatures of stingrays buried in the sand. It then uses its “hammer” to pin down the stingray.
Pacific hagfish resting on bottom. Hagfish coat themselves and any dead fish they find with noxious slime making them inedible to other species.
The tripod fish, a species of spiderfish, uses its fin extensions to “stand” on the bottom.
Gargoyle fish
The fringe-lipped flathead is found in estuaries and coastal bays
Some fishes don’t fit into the above classification. For example, the family of nearly blind spiderfishes, common and widely distributed, feed on benthopelagic zooplankton. Yet they are strictly benthic fish, since they stay in contact with the bottom. Their fins have long rays they use to “stand” on the bottom while they face the current and grab zooplankton as it passes by.
The bodies of benthic fish are adapted for ongoing contact with the sea floor. Swimbladders are usually absent or reduced, and the bodies are usually flattened in one way or another. Following Moyle and Cech (2004) they can be divided into five overlapping body shapes:
Body types of benthic fish
Bottom rovers
Bottom rovers “have a rover-predator-like body , except that the head tends to be flattened, the back humped, and the pectoral fins enlarged. North American catfish with large mouths at the end of the snout, small armoured catfish with small mouths beneath the snout, and sturgeons, with fleshy protusible lips located well below the snout that are used to suck plant and animal matter off the bottom.”
Bottom clingers
Bottom clingers “are mainly small fish with flattened heads, large pectoral fins, and structures (usually modified pelvic fins) that enable them to adhere to the bottom. Such structures are handy in swift streams, or intertidal areas with strong currents. The simplest arrangement is possessed by sculpins, which use their small, closely spaced pelvic fins, as antiskid devices. However, other families of fishes, such as gobies, and clingfishes have evolved suction cups.”
Bottom hiders
Bottom hiders “are similar in many ways to bottom clingers. but they lack the clinging devices and tend to have more elongate bodies and smaller heads. These forms usually live under rocks or in crevices or lie quietly on the bottom in still waters. The darters of North American streams are in the category, as are many blennies.”
Flatfish
Flatfish “have the most extreme morphologies of the bottom fish. Flounders are essentially deep-bodied fish which live with one side on the bottom. In these fish, the eye on the downward side migrates during development to the upward side, and the mouth often assumes a peculiar twist to enable bottom feeding. In contrast, skates and rays are flattened dorsoventrally, and mostly move about by flapping their extremely large pectoral fins. Not only is the mouth completely ventral on these fish, the main water intakes for respiration (the spiracles) are located on the top of the head.”
Rattails
Rattail-shaped fish “have bodies that begin with large pointy-snouted heads and large pectoral fins and end and in long pointed rat-like tails. These fish are almost all bottom-dwelling (benthic) inhabitants of the deep sea, but exactly why this peculiar morphology is so popularamong them is poorly understood. The fish live by scavenging and preying on benthic invertebrates. Examples are the grenadiers, brotulas (pictured), and chimaeras.”
Benthopelagic fish
The sluggish bathydemersal false catshark, shown here at a depth of 1,200 meters, has an enormous oil-filled liver which lets it hover off the continental slope at near-neutral buoyancy. It feeds on cephalopods, cutthroat eels, grenadiers, snake mackerel, and lanternsharks.
Benthopelagic fish inhabit the water just above the bottom, feeding on benthos and zooplankton. Most dermersal fish are benthopelagic.
Deep sea benthopelagic teleosts all have swimbladders. The dominate species, rattails and cusk eels, have considerable biomass. Other species include deep sea cods (morids), deep sea eels, halosaurs and notacanths.
Benthopelagic sharks, like the deep sea squaloid sharks, achieve neutrally buoyancy with the use of large oil-filled livers. Sharks adapt well to fairly high pressures. They can often be found on slopes down to about 2000 metres, scavenging on food falls such as dead whales. However, the energy demands of sharks are high, since they need to swim constantly and maintain a large amount of oil for buoyancy. These energy needs cannot be met in the extreme oligotrophic conditions that occur at great depths.
Shallow water stingrays are benthic, and can lie on the bottom because of their negative buoyancy. Deep sea stingrays are benthopelagic, and like the squaloids have very large livers which give them neutral buoyancy.
Benthopelagic fish can be divided into flabby or robust body types. Flabby benthopelagic fishes are like bathypelagic fishes; they have a reduced body mass, and low metabolic rates, expending minimal energy as they lie and wait to ambush prey. An example of a flabby fish is the cusk-eel Acanthonus armatus, a predator with a huge head and a body that is 90 percent water. This fish has the largest ears (otoliths) and the smallest brain in relation to its body size of all known vertebrates.
Deepwater benthopelagic fish are robust, muscular swimmers that actively cruise the bottom searching for prey. They often live around features, such as seamounts, which have strong currents. Commercial examples are the orange roughy and Patagonian toothfish.
Habitats
Sediment Rock
The edge of the continental shelf marks the boundary where the shelf gives way to, and then gradually drops into abyssal depths. This edge marks the boundary between coastal, relatively shallow, benthic habitats, and the deep benthic habitats. Coastal demersal fishes live on the bottom of inshore waters, such as bays and estuaries, and further out, on the floor of the continental shelf. Deep water demersal fish live beyond this edge, mostly down the continental slopes and along the continental rises which drop to the abyssal plains. This is the continental margin, constituting about 28% of the total oceanic area. Other deep sea demersal fish can also be found around seamounts and islands.
The term bathydemersal fish is sometimes used instead of “deep water demersal fish”. Bathydemersal refers to demersal fish which live at depths greater than 200 metres.
The term epibenthic is also used to refer to organism that live on top of the ocean floor, as opposed to those that burrow into the seafloor substrate. However the terms mesodemersal, epidemersal, mesobenthic and bathybenthic are not used.
Coastal
See also: Coastal fish and Reef fish
Coastal demersal fish are found on or near the seabed of coastal waters between the shoreline and the edge of the continental shelf, where the shelf drops into the deep ocean. Since the continental shelf is generally less than 200 metres deep, this means that coastal waters are generally epipelagic. The term includes demersal reef fish and demersal fish that inhabit estuaries, inlets and bays.
Triggerfish use a jet of water to uncover sand dollars buried in sand.
The mangrove jack eats crustaceans
Many puffer fish species crush the shells of molluscs
The venomous toadfish, a benthic ambush predator, blends into sandy or muddy bottoms.
Young mangrove jacks, a sought after eating and sport fish, dwell in estuaries around mangrove roots, fallen trees, rock walls, and any other snag areas where smaller prey reside for protection. When they mature, they migrate into open waters, sometimes hundreds of kilometres from the coast to spawn.
The stargazer Uranoscopus sulphureus.
Stargazers are found worldwide in shallow waters. They have eyes on top of their heads and a large upward-facing mouth. They bury themselves in sand, and leap upwards to ambush benthopelagic fish and invertebrates that pass overhead. Some species have a worm-shaped lure growing out of the floor of the mouth, which they wiggle to attract prey. Stargazers are venomous and can deliver electric shocks. They have been called “the meanest things in creation.”
Other examples of coastal demersal fish are cod, plaice, monkfish and sole.
Deep water
Cross-section of an ocean basin. Note significant vertical exaggeration.
Deep water demersal fish occupy the benthic regions beyond the continental margins.
On the continental slope, demersal fishes are common. They are more diverse than coastal demersal fish, since there is more habitat diversity. Further out are the abyssal plains. These flat, featureless regions occupy about 40 percent of the ocean floor. They are covered with sediment but largely devoid of benthic life (benthos). Deep sea benthic fishes are more likely to associate with canyons or rock outcroppings among the plains, where invertebrate communities are established. Undersea mountains (seamounts) can intercept deep sea currents, and cause productive upwellings which support benthic fish. Undersea mountain ranges can separate underwater regions into different ecosystems.
Rattails and brotulas are common, and other well established families are eels, eelpouts, hagfishes, greeneyes, batfishes and lumpfishes.
The bodies of deep water demersal fishes are muscular with well developed organs. In this way they are closer to mesopelagic fishes than bathypelagic fishes. In other ways, they are more variable. Photophores are usually absent, eyes and swimbladders range from absent to well developed. They vary in size, and larger species, greater than one metre, are not uncommon.
Giant grenadier, an elongate deep water demersal fish with large eyes and well-developed lateral lines
Deep sea demersal fish are usually long and narrow. Many are eels or shaped like eels. This may be because long bodies have long lateral lines. Lateral lines detect low-frequency sounds, and some demersal fishes have muscles that drum such sounds to attract mates. Smell is also important, as indicated by the rapidity with which demersal fish find traps baited with bait fish.
The main diet of deep sea demersal fish is invertebrates of the deep sea benthos and carrion. Smell, touch and lateral line sensitivities seem to be the main sensory devices for locating these.
Like coastal demersal fish, deep sea demersal fish can be divided into benthic fish and benthopelagic fish, where the benthic fish are negatively buoyant and benthopelagic fish are neutrally buoyant.
The availability of plankton for food diminishes rapidly with depth. At 1000 metres, the biomass of plankton is typically about 1 percent of that at the surface, and at 5000 metres about 0.01 percent. Given there is no sunlight, energy enters deep water zones as organic matter. There are three main ways this happens. Firstly, organic matter can move into the zone from the continental landmass, for example, through currents that carry the matter down rivers, then plume along the continental shelf and finally spill down the continental slope. Other matter enters as particulate matter raining down from the overhead water column in the form of marine snow, or as sinking overhead plant material such as eelgrass, or as “large particles” such as dead fish and whales sinking to the bottom. A third way energy can arrive is through fish, such as vertically migrating mesopelagic fishes that can enter into the demersal zone as they ascend or descend. The demersal fish and invertebrates consume organic matter that does arrive, break it down and recycle it. A consequence of these energy delivery mechanisms is that the abundance of demersal fish and invertebrates gradually decrease as the distance from continental shorelines increases.
Although deep water demersal fish species are not generally picky about what they eat, there is still some degree of specialisation. For example, different fish have different mouth sizes, which determines the size of the prey they can handle. Some feed mostly on benthopelagic organisms. Others fed mostly on epifauna (invertebrates on top of the seafloor surface, also called epibenthos), or alternatively on infauna (invertebrates that burrow into the seafloor substrate). Infauna feeders can have considerable sediment in their stomachs. Scavengers, such as snubnosed eels and hagfish, also eat infauna as a secondary food source.
Snubnosed eel
Muddy arrowtooth eel
White hake
Some feed on carrion. Cameras show that when a dead fish is placed on the bottom, vertebrate and invertebrate scavengers appear very quickly. If the fish is large, some scavengers burrow in and eat it from the inside out. Some fish, such as grenadiers, also appear and start feeding on the scavenging inverebrates and amphipods. Other specialization is based on depth distribution. Some of the more abundant upper continental slope fish species, such as cutthroat eel and longfinned hake, mainly feed on on epipelagic fish. But generally, the most abundant deep water demersal fish species feed on invertebrates.
At great depths, food scarcity and extreme pressure limits the ability of fish to survive. The deepest point of the ocean is about 11,000 metres. Bathypelagic fishes are not normally found below 3,000 metres. It may be that extreme pressures interfere with essential enzyme functions.
The deepest-living fish known, the strictly benthic Abyssobrotula galatheae, eel-like and blind, feeds on benthic invertebrates. A living example was trawled from the bottom of the Puerto Rico Trench in 1970 from a depth of 8,370 metres (27,453 ft).
In 2008, a shoal of 17 hadal snailfish, a species of deep water snailfish, was filmed by a UK-Japan team using remote operated landers at depths of 7.7 km (4.8 miles) in the Japan Trench in the Pacific. The fish were 30 centimetres long (12 in), and were darting about, using vibration sensors on their nose to catch shrimps. The team also reported that the appearance of the fish, unlike that of most deep sea fish, was surprisingly “cute”, and that they were surprised by how active the fish were at these depths.
Demersal fisheries
Most demersal fish of commercial or recreational interest are coastal, confined to the upper 200 metres. Commercially important demersal food fish species include flatfish, such as flounder, sole, turbot, plaice, and halibut. Also important are cod, hake, redfish, haddock, bass, congers, sharks, rays and chimaeras.
The following table shows the world capture production of some groups of demersal species in tonnes.
Capture production by groups of species in tonnes
Group
1999
2000
2001
2002
2003
2004
2005
Demersal fish output in 2005
Flounders, halibuts, soles
956 926
1 009 253
948 427
915 177
917 326
862 162
900 012
Cods, hakes, haddocks
9 431 141
8 695 910
9 304 922
8 474 044
9 385 328
9 398 780
8 964 873
Miscellaneous demersal fishes
2 955 849
3 033 384
3 008 283
3 062 222
3 059 707
3 163 050
2 986 081
American plaice are usually found between 90 and 250 metres (but have been found at 3000 m). They feed on small fishes and invertebrates.
Atlantic cod are usually found between 150 and 200 metres, they are omnivorous and feed on invertebrates and fish, including young cod.
Black sea bass are popular demersal fish found on the eastern coast of North America.
Grouper are ambush predators with a powerful sucking system that sucks their prey in from a distance.
Black sea bass inhabit US coasts from Maine to NE Florida and the eastern Gulf of Mexico, and are most abundant off the waters of New York. They are found in inshore waters (bays and sounds) and offshore in waters up to a depth of 130 m (425′). They spend most of their time close to the sea floor and are often congregated around bottom formations such as rocks, man-made reefs, wrecks, jetties, piers, and bridge pilings. Black sea bass are sought after recreational and commercial fish, and have been overfished.
Grouper are often found around reefs. They have stout bodies and large mouths. They are not built for long-distance or fast swimming. They can be quite large, and lengths over a meter and weights up to 100 kg are not uncommon. They swallow prey rather than biting pieces off it. They do not have many teeth on the edges of their jaws, but they have heavy crushing tooth plates inside the pharynx. They lie in wait, rather than chasing in open water. They are found in areas of hard or consolidated substrate, and use structural features such as ledges, rocks, and coral reefs ( as well as artificial reefs like wrecks and sunken barges) as their habitat. Their mouth and gills form a powerful sucking system that sucks their prey in from a distance. They also use their mouth to dig into sand to form their shelters under big rocks, jetting it out through their gills. Their gill muscles are so powerful that it is nearly impossible to pull them out of their cave if they feel attacked and extend those muscles to lock themselves in. There is some research indicating that roving coral groupers (Plectropomus pessuliferus) sometimes cooperate with giant morays in hunting.
Deepwater benthopelagic fish are robust, muscular swimmers that actively cruise the bottom searching for prey. They often live around features, such as seamounts, which have strong currents. Commercial examples are the orange roughy and Patagonian toothfish. Because these fish were once abundant, and because their robust bodies are good to eat, these fish have been commercially harvested.
The Patagonian toothfish is a robust benthopelagic fish
So is the orange roughy
The blue grenadier (hoki), a deep water demersal fish, is subjected to a large sustainable fishing industry in New Zealand.
Conservation status
Major demersal fishery species in the North Sea such as cod, plaice, monkfish and sole, are listed by the ICES as “outside safe biological limits.”
The True Sole solea solea is sufficiently broadly distributed that it is not considered a threatened species; however, overfishing in Europe has produced severely diminished populations, with declining catches in many regions. For example, the western English Channel and Irish Sea sole fisheries face potential collapse according to data in the UK Biodiversity Action Plan.
Sole, along with the other major bottom-feeding fish in the North Sea such as cod, monkfish, and plaice, is listed by the ICES as “outside safe biological limits.” Moreover, they are growing less quickly now and are rarely older than six years, although they can reach forty. World stocks of large predatory fish and large ground fish such as sole and flounder were estimated in 2003 to be only about 10% of pre-industrial levels. According to the World Wildlife Fund in 2006, “of the nine sole stocks, seven are overfished with the status of the remaining two unknown.” Data is insufficient to assess the remaining stocks; however, landings for all stocks are at or near historical lows.”
World stocks of large predatory fish and large ground fish such as sole and flounder were estimated in 2003 to be only about 10% of pre-industrial levels, largely due to overfishing. Most overfishing is due to the extensive activities of the fishing industry. Current research indicate that the flounder population could be as low as 15 million due to heavy overfishing and industrial pollution along the Gulf of Mexico surrounding the coast of Texas.
Seafood Watch have placed on their list of seafood that sustainability-minded consumers should avoid the following demersal fish: sturgeon (imported wild), Chilean seabass, cod (Atlantic, imported Pacific) , flounder (Atlantic), halibut (Atlantic), sole (Atlantic), (grouper, monkfish, orange roughy, demersal shark, red snapper and tilapia (Asia farmed).
See also
Bottom feeder
Groundfish
Whitefish
Deep sea
Deep sea fish
Benthic zone
Benthos
Notes
^ a b c d Walrond C Carl . “Coastal fish – Fish of the open sea floor” Te Ara – the Encyclopedia of New Zealand. Updated 2 March 2009
^ a b c d Bone 2008, p. 42.
^ a b c Moyle and Cech, 2004, p. 588
^ Fairchild, E.A. and Howell, W.H, E. A. (2004). “Factors affecting the post-release survival of cultured juvenile Pseudopleuronectes americanus” (PDF). Journal of Fish Biology. 65 (Supplementary A): 6987. doi:10.1111/j.0022-1112.2004.00529.x. http://cinemar.unh.edu/fisheries/stock_enhancement/05_jfb529.pdf. July 17, 2004. Accessed 2009-06-08.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Taeniura lymma” in FishBase. August 2009 version.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Bathypterois grallator” in FishBase. August 2009 version.
^ Sulak KJ () “The systematics and biology of Bathypterois (Pisces, Chlorophthalmidae) with a revised classification of benthic myctophiform fishes” Ichthyological Research, 32(4)443-446.
^ a b Moyle and Cech, 2004, p. 13
^ a b c d e Moyle and Cech, 2004, p. 14
^ Compagno, Leonard J.V. (1984). Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date. Rome: Food and Agricultural Organization. ISBN 9251013845.
^ Martin, R.A. Procellariidae and Pseudotriakidae: Finback & False Catsharks. ReefQuest Centre for Shark Research. Retrieved on February 14, 2009.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Pseudotriakis microdon” in FishBase. August 2009 version.
^ Mauchline J and Gordon JDM (1986) “Foraging strategies of deep-sea fish”] Mar. Ecol. Prog. Ser. 27: 227-238. Download
^ a b Bone 2008, p. 43.
^ Koslow JA (1996) “Energetic and life-history patterns of deep-sea benthic, benthopelagic and seamount-associated fish” Journal of Fish Biology, 49(sA) 54-74.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Acanthonus armatus” in FishBase. August 2009 version.
^ a b c Fine ML, Horn MH and Cox B (1987) “Acanthonus armatus, a Deep-Sea Teleost Fish with a Minute Brain and Large Ears” Proceedings of the Royal Society B, 230(1259)257-265.
^ P. J. Cook, Chris Carleton (2000) “Continental Shelf Limits: The Scientific and Legal Interface”, ISBN 0195117824
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Batrachoididae” in FishBase. September 2009 version.
^ Russell, D.J., et al., “Biology, Management and Genetic Stock Structure of Mangrove Jack (Lutjanus argentimaculatus) in Australia,” The State of Queensland, Department of Primary Industries and the Fisheries Research Development Corporation, FRDC Project Number 1999/122, 2003.
^ Fisheries Global Information System Species Fact Sheet
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Uranoscopus sulphureus” in FishBase. September 2009 version.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Uranoscopidae” in FishBase. September 2009 version.
^ YouTube video of a Southern Stargazer near Utila, Honduras.
^ Grady, Denise Venom Runs Thick in Fish Families, Researchers Learn New York Times 22 August 2006.
^ a b Moyle and Cech, 2004, p. 587
^ Haedrich RL (1996) “Deep-water fishes: evolution and adaptation in the earth’s largest living spaces” Journal of Fish Biology 49(sA):40-53.
^ Moyle and Cech, 2004, p. 594
^ a b Sedberry GR and Musick JA (1978) “Feeding strategies of some demersal fishes of the continental slope and rise off the mid-Atlantic coast of the USA” Marine Biology, 44:357-375.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Urophycis tenuis” in FishBase. August 2009 version.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Phycis chesteri” in FishBase. August 2009 version.
^ Moyle and Cech, 2004, p. 595
^ Nielsen, J.G. (1977). “The deepest living fish Abyssobrotula galatheae: a new genus and species of oviparous ophidioids (Pisces, Brotulidae)”. Galathea Report 14: 4148.
^ Ryan P “Deep-sea creatures: The bathypelagic zone” Te Ara – the Encyclopedia of New Zealand. Updated 21 September 2007.
^ Nielsen JG (1977) “The deepest living fish Abyssobrotula galatheae: a new genus and species of oviparous ophidioids (Pisces, Brotulidae)”. Galathea Report, 14: 4148.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Abyssobrotula galatheae” in FishBase. August 2009 version.
^ ‘Deepest ever’ living fish filmed BBC News, 7 October 2008.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Pseudoliparis amblystomopsis” in FishBase. March 2009 version.
^ Grainger RJK and Garcia SM (1996) “Chronicles of Marine Fishery Landings (1950-1994): Trend Analysis and Fisheries Potential” FAO: Fisheries technical paper 359. Rome. ISBN 92-5-103899-6.
^ FAO (2006) Yearbooks of Fishery Statistics Summary Tables
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Hippoglossoides platessoides” in FishBase. August 2009 version.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Gadus morhua” in FishBase. August 2009 version.
^ a b Froese, Rainer, and Daniel Pauly, eds. (2009). “Centropristis striata” in FishBase. August 2009 version.
^ Interspecific Communicative and Coordinated Hunting between Groupers and Giant Moray Eels in the Red Sea
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Hoplostethus atlanticus” in FishBase. August 2009 version.
^ Froese, Rainer, and Daniel Pauly, eds. (2009). “Dissostichus eleginoides” in FishBase. August 2009 version.
^ MSC page on the New Zealand Hoki fisheries
^ Clover, Charles. 2004. The End of the Line: How overfishing is changing the world and what we eat. Ebury Press, London. ISBN 0-09-189780-7
^ Myers, Ransom A. and Worm, Boris. “Rapid worldwide depletion of predatory fish communities.” Nature 423, 280-283 (15 May 2003).
^ Dalton, Rex. 2006. “Save the big fish: Targeting of larger fish makes populations prone to collapse.” Published online
^ “European plaice and sole”
^ Clover, Charles. 2004. The End of the Line: How overfishing is changing the world and what we eat. Ebury Press, London. ISBN
^ Myers, Ransom A. and Worm, Boris. “Rapid worldwide depletion of predatory fish communities.” Nature 423, 280283 (15 May 2003).
^ Dalton, Rex. 2006. “Save the big fish: Targeting of larger fish makes populations prone to collapse.”
^ “Monterey Bay Aquarium: Seafood Watch Program – All Seafood List”. Monterey Bay Aquarium. http://www.montereybayaquarium.org/cr/SeafoodWatch/web/sfw_factsheet.aspx?gid=39. Retrieved 2008-04-17.
References
Bone Q and Moore RH (2008) Biology of Fishes Taylor & Francis Group. ISBN 978 0 415 375627
Merrett NR and Haedrich RL (1997) Deep-sea demersal fish and fisheries Chapman and Hall. ISBN 9780412394102.
Moyle, PB and Cech, JJ (2004) Fishes, An Introduction to Ichthyology. 5th Ed, Benjamin Cummings. ISBN 978-0131008472
Demersal fisheries Fishery Research Services. Retrieved 22 July 2009.
Deep water demersal fisheries Joint Nature Conservation Committee. Retrieved 22 July 2009.
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Categories: Aquatic ecology | Marine biology | Ichthyology | Fisheries
About the Author
I am China Products writer, reports some information about dried mango slices , alaskan pink salmon.
More big Australian bass- Fishing Freshwater
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First Alert 3035DF Digital Locking Steel Security Box, 0.27 Cubic Foot, Black/Silver $41.99 Note: Products are not available for Hawaii and Alaska States…. |
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First Alert 2037F Fire and Water File Chest, 0.62 Cubic Foot, Gray $55.95 This UL classified First Alert media protection chest tested to withstand an external temperature up to 1550 degrees for 1/2 hour and independently verified to protect electronic media, such as memory sticks, CD’s, DVD’s and external hard drives. Waterproof even when fully submerged. Key Protector Chest Features: Interior Dimensions(HxWxD): 10.25 in. x 12.17 in. x 8.58 in. Stores standar… |
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First Alert 3040DF Digital Large Security Box, Black/Silver $53.99 Honeywell Security Lock Box with Digital Keypad. Lock it up… from important documents to your prized autographed baseball to your laptop, with the Honeywell Security Lock Box. And while you get BIG peace of mind, thieves just find one aggravating obstacle after another. 48″ security cable. State-of-the-art digital keypad. Double-steel wall construction. Plus, fire-retardant insulation provides a… |
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Passion of the Christ: Songs (Original Songs Inspired by the Film) $16.97 … |
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The Lost Soul $15.00 This CD features six new original works, two of them instrumentals, three traditional songs, and one borrowed tune. 1. Two Doves (Rathje) 5:232. Been All Around This World (trad. arr. Rathje) 3:123. Finn MacCool (Rathje) 3:534. The Lost Soul (trad. arr. Rathje) 2:545. Witch of the Westmereland (Fisher arr. Rathje) 4:146. Dobrology (Rathje) 2:547. Trout (Rathje) 2:408. Temperance Re… |
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Family $18.49 … |
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Charlie Rose – ‘What Just Happened?’ / Religulous (October 13, 2008) $24.95 A conversation about the film ‘What Just Happened?’ with Robert De Niro, Barry Levinson and Art Linson. || A conversation about the film Religulous with Bill Maher and Larry Charles.This product is manufactured on demand using DVD-R recordable media. Amazon.com’s standard return policy will apply…. |
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Keyword Optimization – Complete Guide to Choosing Profitable Keywords for Your Website $14.95 Keyword research and optimization are one of the most important aspects in search engine optimization and rankings. One of the most common mistakes people make when creating a website or putting up an online business is believing they already know what keywords customers are using to find them. If you are not targeting the specific keywords your customers are searching for online, they will NEVER … |
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Quality Pay-Per-Click Traffic Video Series (2008, DVD) $49.99 The DVD includes the following videos: 1 – Understanding Quality Clicks Over Quantity Focusing on clicks that convert is more important than just the concept of getting a high CTR (Click Through Rate). The problem most beginners face is they are taught to use a keyword tool and just start adding tons and tons of keywords into the Adwords keyword list and Walla, some magical conversions will hap… |
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Ohio State Buckeyes Ladies Logo Hair Scrunchie $8.95 Ladies, pull your hair back and show your Buckeye team spirit with this team logo scrunchie!… |
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EIKO KPR102 – 2.4V .7A/B3-1/2 SC Mini Flange Base Miniature $4.98 … |
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6 Watt – S6 – 48 Volt – Candelabra Base – Indicator Light Bulb – Bulbrite 750604 $3.99 Brand: Bulbrite – Part No.: 750604 – Wattage: 6 Watt – Voltage: 48 Volt – Base Finish: Brass – Base Type: Candelabra (E12) – Bulb Color: Clear – Bulb Shape: S6 – Bulb Type: Incandescent – Diameter: 3/4 in. – Length (M.O.L.): 1-7/8 in. – Life Hours: 1500 – Case Quantity: 10 -… |
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Alfa AIP-W505 802.11n/b/g Wireless Broadband Router & Access Point with 4 LAN ports – Wireless-N WiFi WISP, Bridge, AP Router – Advanced Security Futures and Supports URL & Keyword Filtering $49.99 AIP-W505 PCB is the 1 x 10/100Mbps WAN + 4 x 10/100Mbps LAN Ports, 802.11n AP/Router that provide up to 150Mbps high speed throughput. W505 PCB is suitable for WISP applications such as AP/Router mode, WISP mode, WDS Bridge Mode, Wireless Bridge Mode and Hybrid Mode; it’s easy to management by user friendly web-based interfaceSpecifications:ManagementWeb-base management interfaceRemote managementS… |
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Micro Innovations Wireless Link Keyboard (TKB700U) $14.99 Designed for travel and easy collapse, this keyboard is ideal for any user on the go. Foldable design lets you conveniently enter large amounts of data quickly and effortlessly. Ultra-slim design looks sharp and saves space. Folds to go wherever you want. Works with most Palm OS and Pocket PCs. For Device Type: Palm OS;Pocket PCs; Wired/Wireless: Wireless; Maximum Wireless Range: NA;Connector/Port… |
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Decorated Mouse Pad with {Keywords} $9.95 Professional “Brite White” fabric mouse pads are among the most versatile and durable, providing brilliant graphic reproduction for spot color or full color imprints. This durable polyester surface is above industry standards and provides a superior product value overall. Designed to reproduce vibrant detailed images. Our mouse pads have white fabric top with the 100% genuine black rubber base (n… |
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Samsung UN46C6300 46-Inch 1080p 120 Hz LED HDTV (Black) $1,699.99 The Samsung LED 6300: LED picture quality meets Auto Motion Plus 120HzTM Clear Motion Rate technology, with gorgeous results. The 6300′s LED Ultra Clear Panel absorbs ambient light and virtually eliminates reflections, for a more comfortable viewing environment. It’s beautiful form and function, complementing the most stylish of décor…. |
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Samsung UN55C6500 55-Inch 1080p 120 Hz LED HDTV (Black) $2,799.99 What do you get when you combine Internet@TV with 120Hz Clear Motion Rate technology? The Samsung LED 6500. Get the best of the web, right on your HDTV, with downloadable and customizable widgets – and coming soon, Samsung apps. Connect to friends, share pictures, shop online and more. Samsung’s 120Hz Clear Motion Rate technology delivers smooth, natural action in every scene. Samsung LED backligh… |
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Samsung UN55C6300 55-Inch 1080p 120 Hz LED HDTV (Black) $2,499.99 The Samsung LED 6300 HDTV: LED picture quality meets Auto Motion Plus 120HzTM Clear Motion Rate technology, with gorgeous results. The 6300′s LED Ultra Clear Panel absorbs ambient light and virtually eliminates reflections, for a more comfortable viewing environment. It’s beautiful form and function, complementing the most stylish of décor…. |
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Hanes Men’s Classic Basic Crew, Three Pack $16.00 Hanes Classics are constructed with very soft ring-spun cotton for added softness and resiliency…. |
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Lilyette Women’s Strapless Bra with Convertible Straps #929 $32.00 Our Lilyette®Strapless Bra with Convertible Straps is essential for the full figure woman as it offers unparalleled fit and the security that every woman desires. * Offers the best in fit and security * Seamless smooth shaping * Guaranteed to stay in place * Luxurious super soft… |
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Lilyette Women’s Microfiber Minimizer Bra #428 $32.00 Our Lilyette® Microfiber and Lace Minimizer® Bra offers you the very best in beauty and comfort! * Beautiful and comfortable styling * Luxuriously soft fabric* Gorgeous lace details* Smooth under clothes* Guaranteed comfort* Minimizes size – not shapeFabric content: Top Cup: 91% Nylon, 9% ElastaneBottom Cup: 100% NylonBack: 89% Nylon, 1… |
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Sirius SL-EX1 Stiletto Executive Speaker System $89.99 SIRIUS SLEX1 SIRIUS(TM) STILLETTO EXECUTIVE SYSTEM DESKTOP AUDIO SYSTEM FOR THE STILLETO FAMILY; 10W PER CHANNEL;HIGH-QUALITY, 2-WAY SPEAKER SYSTEM; BASS ENHANCEMENT TECHNOLOGY FOR DEEPER LISTENING; HEADPHONE JACK;DESK OR WALL MOUNTABLE; AUX IN;INCLUDES EXECUTIVE SYSTEM, WEATHERPROOF INDOOR/OUTDOOR ANTENNA, AC ADAPTER, REMOTE & WALL MOUNT BRACKET SIRIUS(TM) STILLETTO EXECUTIVE SYSTEM… |
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Electric Volt Black Web Belt $28.00 Jump start your look with this Volt web belt by Electric!… |
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FCS Premium TAIL GATE Surfboard Pad $27.98 These pads help to secure your boards when they extend past your tail gate or trunk. Easy design allows for quick and simple attachment in seconds…. |
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Green Toys Sand Play Set $12.94 Kids will ‘dig’ building castles and hunting for buried treasure with the environmentally friendly Sand Play Set from Green ToysTM. Made of recycled plastic, this classic 4-piece collection of tools consists of a bucket, sand castle mold, shovel and rake. Made in the U.S.A from recycled plastic milk containers, which helps save energy, reduces landfill waste, and lowers greenhouse gas emissions, a… |
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Alex Toys Draw like A Pro $30.00 A fun and easy way to draw…just turn down the lights, switch on the projector, insert a preprinted slide and trace away| Comes with 124 slides, 6 markers, 10 sheets of paper, and a flip book…. |
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Alex 36 X 36 Vinyl Padded Playmat $13.20 All roads lead to fun with this take-along play mat that folds into a toy bag. Open it up anywhere – when you’re finished, pack up the toys and you’re on your way| Open mat measures a generous 36″ x 36″ of prime playing real estate…. |
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Keywords: A Vocabulary of Culture and Society $10.95 Now revised to include new words and updated essays, Keywords focuses on the sociology of language, demonstrating how the key words we use to understand our society take on new meanings and how these changes reflect the political bent and values of society…. |
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YouTube and Video Marketing: An Hour a Day $14.68 A complete, task-based guide to developing, implementing, and tracking a video marketing strategy Online video marketing is crucial in today’s marketplace. This guide teaches you proven, practical guidelines for developing and implementing video marketing for your organization. If you’re a marketer, advertising professional, consultant, or small business owner, here’s a relevant guid… |
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Keywords for American Cultural Studies $21.16 Explore the Keywords Collaborative interactive website at keywords.nyupress.orgAccording to the Oxford English Dictionary, a “keyword” is “a word that is of great importance or significance.” On the web, “keywords” organize vast quantities of complex information. Keywords for American Cultural Studies offers these features and more to its readers, providing indispensable meditations on terms and… |
