Pelagic and demersal fishes

†Norwegian Institute for Nature Research, FRAM − High North Research Centre on Climate and the Environment, NO-9296 Tromsø, Norway

‡Norwegian Institute for Water Research, Gaustadalléen 21, 0349 Oslo, Norway, Norway

§SINTEF Fisheries and Aquaculture, NO-7465 Trondheim, Norway

¶ Department of Zoology, University of Melbourne, Victoria 3010, Australia

National Veterinary Institute and Norwegian School of Veterinary Science, P.O. Box 8156 Dep., NO-0033 Oslo, Norway

#Norwegian Institute for Nature Research, Tungasletta 2, NO-7485 Trondheim, Norway

Environ. Sci. Technol., 2012, 46 (14), pp 7836–7843

DOI: 10.1021/es301191t

Section:

Abstract

Abstract Image

The latitudinal distribution of persistent organic pollutants (POPs: legacy organochlorines [OCs], polybrominated diphenyl ethers [PBDEs, ] and hexabromocyclododecane [HBCD]) was examined in livers of two species of marine fish, the pelagic saithe (Pollachius virens, = 40) and the demersal cod (Gadus morhua, = 40), along a south-north gradient (59°–70°N) on the Norwegian Coast. Cod had in general two to three times higher concentrations of POPs than saithe, probably because of higher exposure in the benthic food chain. The concentrations of heavy halogenated compounds were higher in the southernmost region than further north. Moreover, the POP pattern showed a gradual shift in the compositions from south to north, especially for OCs in cod: i.e. the relative importance of low-chlorinated polychlorinated biphenyl (PCB) congeners and some OC-pesticides (e.g., hexachlorobenzen [HCB]) in the contaminant burdens increased with latitude. The latitudinal fractionation signal was weaker in saithe, possibly due to its pelagic and nomadic behavior. Hence, this study shows not only a strong latitudinal fractionation in the compositional patterns of POPs in marine fish but also the effects of habitat use and fish behavior.


The extended Kalman filter approach to VPA (C.M. 1983 / D:17. Statistics Committee; ref. Demersal, Pelagic and Baltic Fish Committees)
Book (International Council for the Exploration of the Sea)

Fish Stocks/ Windpower/ Wave Generators

2006-11-14 00:23:43 by jaybug39

I have read that ocean fish stocks will be gone in a few years. And I have been thinking since I heard that Massachusetts refused to build wind turbines in Long Island Sound as they were unattractive, why not build some in the pacific where we could create national sea life refuges?
This would help out coastal communities in several regards. Some people would come see the turbines, much like some people visit lighthouses. The energy produced would ease any difficulties coastal communities may face from their currently existing long distance power transmissions. And they would get the benefit of knowing that fish will be around in the future


You might also like:

Mid-water BRUVs to study pelagic fish
Mid-water BRUVs to study pelagic fish
Dutch investigations on the distribution of pelagic O-group gadoids in the North Sea in 1973 (C.M)
Book (International Council for the Exploration of the Sea, Demersal Fish (Northern) Committee)

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