Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific
We examined the feeding habits of the neon flying squid Ommastrephes bartramii from late spring to mid-summer in relation to its northward migration in the transitional waters of the central North Pacific. The winter-spring cohort (ca. 15 to 25 cm in May and 20 to 35 cm in July) and the autumn cohor...
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Inter-Research
2004
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Online Access: | https://oceanrep.geomar.de/id/eprint/53892/ https://oceanrep.geomar.de/id/eprint/53892/1/4550.pdf https://doi.org/10.3354/meps266173 |
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ftoceanrep:oai:oceanrep.geomar.de:53892 2023-05-15T18:28:04+02:00 Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific Watanabe, Hikaru Kubodera, Tsunemi Ichii, Taro Kawahara, Shigeyuki 2004 text https://oceanrep.geomar.de/id/eprint/53892/ https://oceanrep.geomar.de/id/eprint/53892/1/4550.pdf https://doi.org/10.3354/meps266173 en eng Inter-Research https://oceanrep.geomar.de/id/eprint/53892/1/4550.pdf Watanabe, H., Kubodera, T., Ichii, T. and Kawahara, S. (2004) Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific. Open Access Marine Ecology Progress Series, 266 . pp. 173-184. DOI 10.3354/meps266173 <https://doi.org/10.3354/meps266173>. doi:10.3354/meps266173 info:eu-repo/semantics/openAccess Article PeerReviewed 2004 ftoceanrep https://doi.org/10.3354/meps266173 2023-04-07T15:58:41Z We examined the feeding habits of the neon flying squid Ommastrephes bartramii from late spring to mid-summer in relation to its northward migration in the transitional waters of the central North Pacific. The winter-spring cohort (ca. 15 to 25 cm in May and 20 to 35 cm in July) and the autumn cohort (ca. 30 to 45 cm in May and 35 to 50 cm in July) were identified by their dorsal mantle lengths. In May and July, the winter-spring cohort was distributed only in the transition zone (TZ) south of the subarctic boundary. This cohort preyed primarily on crustaceans such as euphausiids and amphipods in May, but in July, their primary prey shifted to the sternoptychid fish Maurolicus imperatorius. In May, the larger-sized autumn cohort was also distributed only in the TZ, but in July, these individuals migrated to the transitional domain (TD) north of the subarctic boundary. The main prey of the autumn cohort were micronektonic animals that dominated the TZ in May: the transitional-water myctophid Symbolophorus californiensis, and 2 subtropical myctophids, Ceratoscopelus warmingi and Electrona risso. Secondary important prey items included the transitional-water squid Onychoteuthis borealijaponica and subarctic gonatid squids such as Gonatus berryi and Berryteuthis anonychus. In July, the main prey species in the TD were S. californiensis and O. borealijaponica, both of which also migrated from the TZ into the TD, crossing the subarctic boundary in summer. We estimated the feeding impact of the autumn squid cohort on myctophids in the TD during summer. Article in Journal/Newspaper Subarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Marine Ecology Progress Series 266 173 184 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We examined the feeding habits of the neon flying squid Ommastrephes bartramii from late spring to mid-summer in relation to its northward migration in the transitional waters of the central North Pacific. The winter-spring cohort (ca. 15 to 25 cm in May and 20 to 35 cm in July) and the autumn cohort (ca. 30 to 45 cm in May and 35 to 50 cm in July) were identified by their dorsal mantle lengths. In May and July, the winter-spring cohort was distributed only in the transition zone (TZ) south of the subarctic boundary. This cohort preyed primarily on crustaceans such as euphausiids and amphipods in May, but in July, their primary prey shifted to the sternoptychid fish Maurolicus imperatorius. In May, the larger-sized autumn cohort was also distributed only in the TZ, but in July, these individuals migrated to the transitional domain (TD) north of the subarctic boundary. The main prey of the autumn cohort were micronektonic animals that dominated the TZ in May: the transitional-water myctophid Symbolophorus californiensis, and 2 subtropical myctophids, Ceratoscopelus warmingi and Electrona risso. Secondary important prey items included the transitional-water squid Onychoteuthis borealijaponica and subarctic gonatid squids such as Gonatus berryi and Berryteuthis anonychus. In July, the main prey species in the TD were S. californiensis and O. borealijaponica, both of which also migrated from the TZ into the TD, crossing the subarctic boundary in summer. We estimated the feeding impact of the autumn squid cohort on myctophids in the TD during summer. |
format |
Article in Journal/Newspaper |
author |
Watanabe, Hikaru Kubodera, Tsunemi Ichii, Taro Kawahara, Shigeyuki |
spellingShingle |
Watanabe, Hikaru Kubodera, Tsunemi Ichii, Taro Kawahara, Shigeyuki Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
author_facet |
Watanabe, Hikaru Kubodera, Tsunemi Ichii, Taro Kawahara, Shigeyuki |
author_sort |
Watanabe, Hikaru |
title |
Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
title_short |
Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
title_full |
Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
title_fullStr |
Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
title_full_unstemmed |
Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific |
title_sort |
feeding habits of neon flying squid ommastrephes bartramii in the transitional region of the central north pacific |
publisher |
Inter-Research |
publishDate |
2004 |
url |
https://oceanrep.geomar.de/id/eprint/53892/ https://oceanrep.geomar.de/id/eprint/53892/1/4550.pdf https://doi.org/10.3354/meps266173 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/53892/1/4550.pdf Watanabe, H., Kubodera, T., Ichii, T. and Kawahara, S. (2004) Feeding habits of neon flying squid Ommastrephes bartramii in the transitional region of the central North Pacific. Open Access Marine Ecology Progress Series, 266 . pp. 173-184. DOI 10.3354/meps266173 <https://doi.org/10.3354/meps266173>. doi:10.3354/meps266173 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps266173 |
container_title |
Marine Ecology Progress Series |
container_volume |
266 |
container_start_page |
173 |
op_container_end_page |
184 |
_version_ |
1766210410063593472 |