Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles
Nezumia aequalis is one of the most abundant fishes on the upper and middle continental slopes (500–1750 m depth zones) of the North‐east Atlantic with a peak abundance of three to four individuals 1000 m −2 swept area in the 750‐m zone. Mean and modal size increased with depth, fish from the Rockal...
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crwiley:10.1111/j.1095-8649.1999.tb00619.x 2024-06-02T08:11:48+00:00 Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles Coggan, R. A. Gordon, J. D. M. Merrett, N. R. 1999 http://dx.doi.org/10.1111/j.1095-8649.1999.tb00619.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1999.tb00619.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1999.tb00619.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 54, issue 1, page 152-170 ISSN 0022-1112 1095-8649 journal-article 1999 crwiley https://doi.org/10.1111/j.1095-8649.1999.tb00619.x 2024-05-03T11:33:31Z Nezumia aequalis is one of the most abundant fishes on the upper and middle continental slopes (500–1750 m depth zones) of the North‐east Atlantic with a peak abundance of three to four individuals 1000 m −2 swept area in the 750‐m zone. Mean and modal size increased with depth, fish from the Rockall Trough (RT) being larger than those at equivalent depths in the Porcupine Seabight (PSB). Sex ratios were close to parity in all depth zones. Females grew larger than males. Head length to total length and to total weight did not differ significantly between sexes but RT fish were heavier at any given length than PSB fish. Serial batch spawning occurred over the first three quarters of the year. Ovaries contained five size groups of eggs, the three largest groups being vitelline and contributing 27% of the absolute individual fecundity which was positively correlated with body size and ranged from 9109 to 26 847. Age determined from sagittal otoliths ranged from 1 to 10 years, the ageing method being validated by a time‐series study of the growing edge of otoliths. The von Bertalanffy growth parameter ( k ) was estimated at 0·175 and 0·216 from head length and otolith length, respectively. Article in Journal/Newspaper North East Atlantic Wiley Online Library Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Journal of Fish Biology 54 1 152 170 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Nezumia aequalis is one of the most abundant fishes on the upper and middle continental slopes (500–1750 m depth zones) of the North‐east Atlantic with a peak abundance of three to four individuals 1000 m −2 swept area in the 750‐m zone. Mean and modal size increased with depth, fish from the Rockall Trough (RT) being larger than those at equivalent depths in the Porcupine Seabight (PSB). Sex ratios were close to parity in all depth zones. Females grew larger than males. Head length to total length and to total weight did not differ significantly between sexes but RT fish were heavier at any given length than PSB fish. Serial batch spawning occurred over the first three quarters of the year. Ovaries contained five size groups of eggs, the three largest groups being vitelline and contributing 27% of the absolute individual fecundity which was positively correlated with body size and ranged from 9109 to 26 847. Age determined from sagittal otoliths ranged from 1 to 10 years, the ageing method being validated by a time‐series study of the growing edge of otoliths. The von Bertalanffy growth parameter ( k ) was estimated at 0·175 and 0·216 from head length and otolith length, respectively. |
format |
Article in Journal/Newspaper |
author |
Coggan, R. A. Gordon, J. D. M. Merrett, N. R. |
spellingShingle |
Coggan, R. A. Gordon, J. D. M. Merrett, N. R. Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
author_facet |
Coggan, R. A. Gordon, J. D. M. Merrett, N. R. |
author_sort |
Coggan, R. A. |
title |
Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
title_short |
Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
title_full |
Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
title_fullStr |
Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
title_full_unstemmed |
Aspects of the biology of Nezumia aequalis from the continental slope west of the British Isles |
title_sort |
aspects of the biology of nezumia aequalis from the continental slope west of the british isles |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1999.tb00619.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1999.tb00619.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1999.tb00619.x |
long_lat |
ENVELOPE(-13.000,-13.000,50.500,50.500) ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Porcupine Seabight Rockall Trough |
geographic_facet |
Porcupine Seabight Rockall Trough |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Journal of Fish Biology volume 54, issue 1, page 152-170 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1999.tb00619.x |
container_title |
Journal of Fish Biology |
container_volume |
54 |
container_issue |
1 |
container_start_page |
152 |
op_container_end_page |
170 |
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1800758054587727872 |