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Changes in fish distribution in the eastern North Atlantic: are we seeing a coherent response to changing temperature?
Brander, K.M.; Blom, G.; Borges, M.F.; Erzini, K.; Henderson, G.; MacKenzie, B.R.; Mendes, H.; Santos, A.M.P.; Toresen, P. (2003). Changes in fish distribution in the eastern North Atlantic: are we seeing a coherent response to changing temperature? ICES Mar. Sci. Symp. 219: 260-273
In: ICES Marine Science Symposia. ICES/Reitzel: Copenhagen. ISSN 0906-060X
|
| Trefwoorden |
Behaviour > Migrations
Climatic changes
Distribution
Environmental effects > Temperature effects
North East Atlantic [Marine Regions]
Marien/Kust |
| Auteurs | | Top |
- Brander, K.M.
- Blom, G.
- Borges, M.F.
|
- Erzini, K.
- Henderson, G.
- MacKenzie, B.R.
|
- Mendes, H.
- Santos, A.M.P.
- Toresen, P.
|
| Abstract |
The temperature of the upper 300 m of the North Atlantic increased by about 0,57°C between 1984 and 1999, but this underlying trend was overlain with substantial geographic and interannual variability. Northward shifts occurred in the distribution of many commercial and non-commercial fish species in the NE Atlantic during the 1990s. New records were established for a number of Mediterranean and NW African species on the south coast of Portugal. Red mullet (Mullus surmuletus) and bass (Dicentrarchus labrax) extended their ranges northward to western Norway and catches of the former increased throughout the 1990s in the North Sea. Abundance or relative abundance of warm-water commercial species of gadoids and flatfish generally increased during the 1990s, but like the warming trend the changes in distribution and abundance were by no means uniform and there was considerable interannual variability. There were also examples of southward shifts for some species, which can be related to local hydrographic conditions, such as upwelling. Information on distribution and abundance of Greenland cod (Gadus morhua L.) and Norwegian spring-spawning herring (Clupea harengus during a previous warming period in the late 1920s and 1930s is also presented and compared with changes in the 1990s. |
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