Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems.
Some problems in the geographical distribution of oceanic midwater fishes in the Atlantic Ocean are discussed. Remarkable differences were observed in the latitudinal distribution of mesopelagic fish species in the North Atlantic Ocean. These can be related to the oceanic circulation. The Gulf Strea...
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ftarchimer:oai:archimer.ifremer.fr:2000 2023-05-15T14:04:56+02:00 Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. Krefft, Gerhard 1976-09 application/pdf https://archimer.ifremer.fr/doc/1976/publication-2000.pdf https://archimer.ifremer.fr/doc/00000/2000/ eng eng ISTPM https://archimer.ifremer.fr/doc/1976/publication-2000.pdf https://archimer.ifremer.fr/doc/00000/2000/ Ifremer info:eu-repo/semantics/openAccess restricted use Revue des Travaux de l'Institut des Pêches Maritimes (0035-2276) (ISTPM), 1976-09 , Vol. 40 , N. 3-4 , P. 439-460 Atlantic Marine fish Geographical distribution text Publication info:eu-repo/semantics/article 1976 ftarchimer 2021-09-23T20:14:24Z Some problems in the geographical distribution of oceanic midwater fishes in the Atlantic Ocean are discussed. Remarkable differences were observed in the latitudinal distribution of mesopelagic fish species in the North Atlantic Ocean. These can be related to the oceanic circulation. The Gulf Stream system gives rise to a discontinuity in the position of the oceanic Polar Front. This front, a sharp bounary between subpolar and subtropical waters, follows the northern edge of the Gulf Stream in the western part of the Ocean. East of about 25 degree W the Polar Front becomes weak and untraceable. Relatively warm, high-saline-water of the North Atlantic Current flows North and northeastward by the spreading of the Mediterranean Intermediate Water. Due to the pecularities of the circulation, secondary Polar Fronts are built up at the borders of the results in a broad zonal range extension of midwater fishes to the north and northeast. An analysis of the fishes captured during the International Overflow '73 Expedition of ICES confirms the well known earlier observations of an unhampered northward drift of many temperate and subtropical species to the secondary Polar Fronts. The waters of the Atlantic sector of the Antarctic Ocean harbour a faunal community of midwater fishes quite distinct from communites found to the north of the Subtropical Convergence. PARIN et al. (1974) subdivided the fauna into a subantarctic or notalian, and an antarctic group. This classification is rechecked in the light of the recent 'Walther Herwig' cruises to the area. Four distribution patterns at least are described for the species of the Notalian Zone. The existence of a genuine Antarctic midwater fish fauna remains doubtful at present. The distribution patterns of deep-living mesopelagic fishes rarely taken by smaller gear are compred with those of the common diurnally migrating species. A tendency of the constantly deep-living fishes to enlarge their areas is observed. Bathypelagic species may belong either to the 'Widespread Pattern' or to specialized patterns, which are interpreted as niches acquired or enforced by competition. Such patterns are known as yet in some alepocephaloid fishes only. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean north atlantic current North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Antarctic Ocean Ocean Harbour ENVELOPE(-36.247,-36.247,-54.334,-54.334) The Antarctic |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Atlantic Marine fish Geographical distribution |
spellingShingle |
Atlantic Marine fish Geographical distribution Krefft, Gerhard Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
topic_facet |
Atlantic Marine fish Geographical distribution |
description |
Some problems in the geographical distribution of oceanic midwater fishes in the Atlantic Ocean are discussed. Remarkable differences were observed in the latitudinal distribution of mesopelagic fish species in the North Atlantic Ocean. These can be related to the oceanic circulation. The Gulf Stream system gives rise to a discontinuity in the position of the oceanic Polar Front. This front, a sharp bounary between subpolar and subtropical waters, follows the northern edge of the Gulf Stream in the western part of the Ocean. East of about 25 degree W the Polar Front becomes weak and untraceable. Relatively warm, high-saline-water of the North Atlantic Current flows North and northeastward by the spreading of the Mediterranean Intermediate Water. Due to the pecularities of the circulation, secondary Polar Fronts are built up at the borders of the results in a broad zonal range extension of midwater fishes to the north and northeast. An analysis of the fishes captured during the International Overflow '73 Expedition of ICES confirms the well known earlier observations of an unhampered northward drift of many temperate and subtropical species to the secondary Polar Fronts. The waters of the Atlantic sector of the Antarctic Ocean harbour a faunal community of midwater fishes quite distinct from communites found to the north of the Subtropical Convergence. PARIN et al. (1974) subdivided the fauna into a subantarctic or notalian, and an antarctic group. This classification is rechecked in the light of the recent 'Walther Herwig' cruises to the area. Four distribution patterns at least are described for the species of the Notalian Zone. The existence of a genuine Antarctic midwater fish fauna remains doubtful at present. The distribution patterns of deep-living mesopelagic fishes rarely taken by smaller gear are compred with those of the common diurnally migrating species. A tendency of the constantly deep-living fishes to enlarge their areas is observed. Bathypelagic species may belong either to the 'Widespread Pattern' or to specialized patterns, which are interpreted as niches acquired or enforced by competition. Such patterns are known as yet in some alepocephaloid fishes only. |
format |
Article in Journal/Newspaper |
author |
Krefft, Gerhard |
author_facet |
Krefft, Gerhard |
author_sort |
Krefft, Gerhard |
title |
Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
title_short |
Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
title_full |
Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
title_fullStr |
Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
title_full_unstemmed |
Distribution patterns of oceanic fishes in the Atlantic Ocean. Selected problems. |
title_sort |
distribution patterns of oceanic fishes in the atlantic ocean. selected problems. |
publisher |
ISTPM |
publishDate |
1976 |
url |
https://archimer.ifremer.fr/doc/1976/publication-2000.pdf https://archimer.ifremer.fr/doc/00000/2000/ |
long_lat |
ENVELOPE(-36.247,-36.247,-54.334,-54.334) |
geographic |
Antarctic Antarctic Ocean Ocean Harbour The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Ocean Harbour The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean north atlantic current North Atlantic |
genre_facet |
Antarc* Antarctic Antarctic Ocean north atlantic current North Atlantic |
op_source |
Revue des Travaux de l'Institut des Pêches Maritimes (0035-2276) (ISTPM), 1976-09 , Vol. 40 , N. 3-4 , P. 439-460 |
op_relation |
https://archimer.ifremer.fr/doc/1976/publication-2000.pdf https://archimer.ifremer.fr/doc/00000/2000/ |
op_rights |
Ifremer info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766276388768186368 |