Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior
Ontogenetic variation in the strontium:calcium (Sr:Ca) ratios was measured in statoliths of the Japanese common squid Todarodes pacificus. Two different geographical groups of T. pacificus inhabit the Sea of Japan; these groups are separated by the Subarctic Front during the summer. Element ratios w...
Published in: | Marine Ecology Progress Series |
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InterResearch
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Online Access: | https://oceanrep.geomar.de/id/eprint/53137/ https://oceanrep.geomar.de/id/eprint/53137/1/3903.pdf https://doi.org/10.3354/meps251169 |
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ftoceanrep:oai:oceanrep.geomar.de:53137 2023-05-15T18:27:46+02:00 Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior Ikeda, Yuzuru Arai, Nobuaki Kidokoro, Hideaki Sakamoto, Wataru 2003 text https://oceanrep.geomar.de/id/eprint/53137/ https://oceanrep.geomar.de/id/eprint/53137/1/3903.pdf https://doi.org/10.3354/meps251169 en eng InterResearch https://oceanrep.geomar.de/id/eprint/53137/1/3903.pdf Ikeda, Y., Arai, N., Kidokoro, H. and Sakamoto, W. (2003) Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior. Open Access Marine Ecology Progress Series, 251 . pp. 169-179. DOI 10.3354/meps251169 <https://doi.org/10.3354/meps251169>. doi:10.3354/meps251169 info:eu-repo/semantics/openAccess Article PeerReviewed 2003 ftoceanrep https://doi.org/10.3354/meps251169 2023-04-07T15:57:10Z Ontogenetic variation in the strontium:calcium (Sr:Ca) ratios was measured in statoliths of the Japanese common squid Todarodes pacificus. Two different geographical groups of T. pacificus inhabit the Sea of Japan; these groups are separated by the Subarctic Front during the summer. Element ratios were measured with a wavelength-dispersive spectrometer for 11 individuals from a cold-water subarctic region, which harbors large squid (Subarctic Group), for 12 individuals from a warm-water region, which harbors smaller squid (Tsushima Group), and for 2 individuals from the Subarctic Front. The squid ranged from 190 to 218 mm in mantle length (ML) and were 191 to 262 d old. Similar measurements were obtained for 12 tagged T. pacificus (187 to 259 mm ML; 214 to 312 d old) that were released and recovered in the Subarctic and the Tsushima Current between June and August 1997 (tagging duration 5 to >40 d). Ontogenetic variation in Sr:Ca ratios from hatchlings to sub-adults differed between the 2 geographical groups. Sr:Ca ratios were high at hatching followed by a drastic decrease up to 10 d of age for both groups. These ratios increased until 40 d of age, continuing at high levels until around 150 d, when they decreased in all specimens of the Tsushima Group. In the Subarctic Group, however, the variations in Sr:Ca ratios differed between individuals. Sr:Ca ratios at the age when squid recruited to either the Subarctic or the Tsushima Current were similar. These differences reflect the different spawning grounds and transport routes of the 2 groups. Thermal history was recorded from the statoliths of tagged individuals, and small fluctuations and seasonal variations in the Sr:Ca ratios were observed. These correspond to diel vertical movements and endogenous rhythms of the squid, and the formation and movements of the cold-water layer in their habitat. Article in Journal/Newspaper Subarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Marine Ecology Progress Series 251 169 179 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Ontogenetic variation in the strontium:calcium (Sr:Ca) ratios was measured in statoliths of the Japanese common squid Todarodes pacificus. Two different geographical groups of T. pacificus inhabit the Sea of Japan; these groups are separated by the Subarctic Front during the summer. Element ratios were measured with a wavelength-dispersive spectrometer for 11 individuals from a cold-water subarctic region, which harbors large squid (Subarctic Group), for 12 individuals from a warm-water region, which harbors smaller squid (Tsushima Group), and for 2 individuals from the Subarctic Front. The squid ranged from 190 to 218 mm in mantle length (ML) and were 191 to 262 d old. Similar measurements were obtained for 12 tagged T. pacificus (187 to 259 mm ML; 214 to 312 d old) that were released and recovered in the Subarctic and the Tsushima Current between June and August 1997 (tagging duration 5 to >40 d). Ontogenetic variation in Sr:Ca ratios from hatchlings to sub-adults differed between the 2 geographical groups. Sr:Ca ratios were high at hatching followed by a drastic decrease up to 10 d of age for both groups. These ratios increased until 40 d of age, continuing at high levels until around 150 d, when they decreased in all specimens of the Tsushima Group. In the Subarctic Group, however, the variations in Sr:Ca ratios differed between individuals. Sr:Ca ratios at the age when squid recruited to either the Subarctic or the Tsushima Current were similar. These differences reflect the different spawning grounds and transport routes of the 2 groups. Thermal history was recorded from the statoliths of tagged individuals, and small fluctuations and seasonal variations in the Sr:Ca ratios were observed. These correspond to diel vertical movements and endogenous rhythms of the squid, and the formation and movements of the cold-water layer in their habitat. |
format |
Article in Journal/Newspaper |
author |
Ikeda, Yuzuru Arai, Nobuaki Kidokoro, Hideaki Sakamoto, Wataru |
spellingShingle |
Ikeda, Yuzuru Arai, Nobuaki Kidokoro, Hideaki Sakamoto, Wataru Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
author_facet |
Ikeda, Yuzuru Arai, Nobuaki Kidokoro, Hideaki Sakamoto, Wataru |
author_sort |
Ikeda, Yuzuru |
title |
Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
title_short |
Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
title_full |
Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
title_fullStr |
Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
title_full_unstemmed |
Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior |
title_sort |
strontium:calcium ratios in statoliths of japanese common squid todarodes pacificus (cephalopoda: ommastrephidae) as indicators of migratory behavior |
publisher |
InterResearch |
publishDate |
2003 |
url |
https://oceanrep.geomar.de/id/eprint/53137/ https://oceanrep.geomar.de/id/eprint/53137/1/3903.pdf https://doi.org/10.3354/meps251169 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/53137/1/3903.pdf Ikeda, Y., Arai, N., Kidokoro, H. and Sakamoto, W. (2003) Strontium:calcium ratios in statoliths of Japanese common squid Todarodes pacificus (Cephalopoda: Ommastrephidae) as indicators of migratory behavior. Open Access Marine Ecology Progress Series, 251 . pp. 169-179. DOI 10.3354/meps251169 <https://doi.org/10.3354/meps251169>. doi:10.3354/meps251169 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps251169 |
container_title |
Marine Ecology Progress Series |
container_volume |
251 |
container_start_page |
169 |
op_container_end_page |
179 |
_version_ |
1766209944583929856 |