Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic
Abstract According to the Ideal Free Distribution theory, individual fish are distributed where environmental conditions are optimal, and the occupied area may vary with population abundance. Thus, observed distributions are a combination of habitat suitability and density‐dependent effects. Data fr...
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crwiley:10.1111/j.1365-2419.2009.00515.x 2024-06-02T08:11:48+00:00 Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic PERSOHN, CECILE LORANCE, PASCAL TRENKEL, VERENA M. 2009 http://dx.doi.org/10.1111/j.1365-2419.2009.00515.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00515.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00515.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 18, issue 4, page 268-285 ISSN 1054-6006 1365-2419 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2419.2009.00515.x 2024-05-03T11:50:00Z Abstract According to the Ideal Free Distribution theory, individual fish are distributed where environmental conditions are optimal, and the occupied area may vary with population abundance. Thus, observed distributions are a combination of habitat suitability and density‐dependent effects. Data from an annual bottom trawl survey taking place in autumn were used to assess associations between the distributions of eight demersal fish species, separately for juveniles and adults, and habitat characteristics (depth, temperature and salinity) in the Bay of Biscay and Celtic Sea. Cumulative distribution functions were used to describe the general frequency distributions of environmental variables and their relationships with fish density. During the period 1992–2006, observed bottom temperatures fluctuated with no time trend (ΔT = 8°C in the first 80 m) and population abundances varied significantly. Juvenile hake, poor cod, blue whiting, adult red gurnard, adult megrim, and lesser‐spotted dogfish were found to be significantly associated with specific depth ranges. Associations with bottom temperature and salinity were weaker. For some species, preferred environmental conditions changed over time, independently of variations in environmental conditions. In general, most species seemed to be able to cope with the experienced range of conditions. Habitat associations were not influenced by abundance variations. Fluctuating abundances had an impact on spatial occupation only for red gurnard adults, lesser‐spotted dogfish and blue whiting juveniles, independent of absolute densities. Article in Journal/Newspaper North East Atlantic Wiley Online Library Hake ENVELOPE(15.612,15.612,66.797,66.797) Fisheries Oceanography 18 4 268 285 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract According to the Ideal Free Distribution theory, individual fish are distributed where environmental conditions are optimal, and the occupied area may vary with population abundance. Thus, observed distributions are a combination of habitat suitability and density‐dependent effects. Data from an annual bottom trawl survey taking place in autumn were used to assess associations between the distributions of eight demersal fish species, separately for juveniles and adults, and habitat characteristics (depth, temperature and salinity) in the Bay of Biscay and Celtic Sea. Cumulative distribution functions were used to describe the general frequency distributions of environmental variables and their relationships with fish density. During the period 1992–2006, observed bottom temperatures fluctuated with no time trend (ΔT = 8°C in the first 80 m) and population abundances varied significantly. Juvenile hake, poor cod, blue whiting, adult red gurnard, adult megrim, and lesser‐spotted dogfish were found to be significantly associated with specific depth ranges. Associations with bottom temperature and salinity were weaker. For some species, preferred environmental conditions changed over time, independently of variations in environmental conditions. In general, most species seemed to be able to cope with the experienced range of conditions. Habitat associations were not influenced by abundance variations. Fluctuating abundances had an impact on spatial occupation only for red gurnard adults, lesser‐spotted dogfish and blue whiting juveniles, independent of absolute densities. |
format |
Article in Journal/Newspaper |
author |
PERSOHN, CECILE LORANCE, PASCAL TRENKEL, VERENA M. |
spellingShingle |
PERSOHN, CECILE LORANCE, PASCAL TRENKEL, VERENA M. Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
author_facet |
PERSOHN, CECILE LORANCE, PASCAL TRENKEL, VERENA M. |
author_sort |
PERSOHN, CECILE |
title |
Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
title_short |
Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
title_full |
Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
title_fullStr |
Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
title_full_unstemmed |
Habitat preferences of selected demersal fish species in the Bay of Biscay and Celtic Sea, North‐East Atlantic |
title_sort |
habitat preferences of selected demersal fish species in the bay of biscay and celtic sea, north‐east atlantic |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2419.2009.00515.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00515.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00515.x |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Hake |
geographic_facet |
Hake |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Fisheries Oceanography volume 18, issue 4, page 268-285 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2419.2009.00515.x |
container_title |
Fisheries Oceanography |
container_volume |
18 |
container_issue |
4 |
container_start_page |
268 |
op_container_end_page |
285 |
_version_ |
1800758057634889728 |