The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf
Abstract The Patagonian longfin squid Loligo gahi undertakes horizontal ontogenetic migrations on the Falkland shelf: juveniles move from spawning grounds located in shallow, inshore waters (20–50 m depths) to feeding grounds near the shelf edge (200–350 m depths). Immature squid feed and grow in th...
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crwiley:10.1046/j.1365-2419.2003.00269.x 2024-09-15T17:46:16+00:00 The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf Arkhipkin, A. I. Grzebielec, R. Sirota, A. M. Remeslo, A. V. Polishchuk, I. A. Middleton, D. A. J. 2003 http://dx.doi.org/10.1046/j.1365-2419.2003.00269.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2419.2003.00269.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2419.2003.00269.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 13, issue 1, page 1-9 ISSN 1054-6006 1365-2419 journal-article 2003 crwiley https://doi.org/10.1046/j.1365-2419.2003.00269.x 2024-07-11T04:35:07Z Abstract The Patagonian longfin squid Loligo gahi undertakes horizontal ontogenetic migrations on the Falkland shelf: juveniles move from spawning grounds located in shallow, inshore waters (20–50 m depths) to feeding grounds near the shelf edge (200–350 m depths). Immature squid feed and grow in these offshore feeding grounds and, upon maturation, migrate back to inshore waters to spawn. The possible influence of environmental factors on L. gahi migrations was investigated using data from oceanographic transects, crossing the region of known L. gahi occurrence. They were made from the inshore waters of East Falkland eastwards to depths of 1250 m on a monthly basis from 1999 to 2001. Four main water types were found in the region: Shelf, Sub‐Antarctic Superficial and Antarctic Intermediate water masses, and Transient Zone waters. The inshore spawning grounds occur in the Shelf Water mass, whereas the feeding squid (medium‐sized immature and maturing individuals) were associated with the Transient Zone. The 5.5°C isotherm appeared to mark the limit of squid distribution into deeper waters in all seasons. Seasonal changes in water mass characteristics and location were found to be important for seasonal changes in L. gahi migrations on the Falkland shelf. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Fisheries Oceanography 13 1 1 9 |
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English |
description |
Abstract The Patagonian longfin squid Loligo gahi undertakes horizontal ontogenetic migrations on the Falkland shelf: juveniles move from spawning grounds located in shallow, inshore waters (20–50 m depths) to feeding grounds near the shelf edge (200–350 m depths). Immature squid feed and grow in these offshore feeding grounds and, upon maturation, migrate back to inshore waters to spawn. The possible influence of environmental factors on L. gahi migrations was investigated using data from oceanographic transects, crossing the region of known L. gahi occurrence. They were made from the inshore waters of East Falkland eastwards to depths of 1250 m on a monthly basis from 1999 to 2001. Four main water types were found in the region: Shelf, Sub‐Antarctic Superficial and Antarctic Intermediate water masses, and Transient Zone waters. The inshore spawning grounds occur in the Shelf Water mass, whereas the feeding squid (medium‐sized immature and maturing individuals) were associated with the Transient Zone. The 5.5°C isotherm appeared to mark the limit of squid distribution into deeper waters in all seasons. Seasonal changes in water mass characteristics and location were found to be important for seasonal changes in L. gahi migrations on the Falkland shelf. |
format |
Article in Journal/Newspaper |
author |
Arkhipkin, A. I. Grzebielec, R. Sirota, A. M. Remeslo, A. V. Polishchuk, I. A. Middleton, D. A. J. |
spellingShingle |
Arkhipkin, A. I. Grzebielec, R. Sirota, A. M. Remeslo, A. V. Polishchuk, I. A. Middleton, D. A. J. The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
author_facet |
Arkhipkin, A. I. Grzebielec, R. Sirota, A. M. Remeslo, A. V. Polishchuk, I. A. Middleton, D. A. J. |
author_sort |
Arkhipkin, A. I. |
title |
The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
title_short |
The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
title_full |
The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
title_fullStr |
The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
title_full_unstemmed |
The influence of seasonal environmental changes on ontogenetic migrations of the squid Loligo gahi on the Falkland shelf |
title_sort |
influence of seasonal environmental changes on ontogenetic migrations of the squid loligo gahi on the falkland shelf |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1046/j.1365-2419.2003.00269.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2419.2003.00269.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2419.2003.00269.x |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Fisheries Oceanography volume 13, issue 1, page 1-9 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2419.2003.00269.x |
container_title |
Fisheries Oceanography |
container_volume |
13 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
9 |
_version_ |
1810494267936735232 |