Stable isotopes in eye lenses reveal migration and mixing patterns of diamond squid in the western North Pacific and its marginal seas
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-09-29 |
| Journal | ICES Journal of Marine Science |
| Authors | Tatsuya Sakamoto, Sachiko Horii, Taketoshi Kodama, Kazutaka Takahashi, Atsushi Tawa |
| Institutions | The University of Tokyo, Japan Fisheries Research and Education Agency |
| Citations | 9 |
Abstract
Section titled āAbstractāAbstract Knowledge of the movements of marine organisms is essential for effective conservation schemes. Here, we investigated the lifetime habitat use of diamond squid, Thysanoteuthis rhombus, collected in the western North Pacific and its marginal seas (the Sea of Japan and the East China Sea) during 2021-2022, whose migratory ecology is poorly known, using bulk stable nitrogen and carbon isotope ratios in eye lenses. From the eye lens isotope profiles, the chronology of the isotopic baseline of squid habitat was estimated by removing the effect of size-dependent changes of trophic position. Then, the baseline estimates were compared to the isoscapes of particulate organic matter. The baseline chronologies showed fluctuations during the paralarval and juvenile stages, becoming stable during the adult stage, suggesting that significant movements mainly occur during the early life stages due to current transport, with adults potentially not undertaking long-distance migrations. The squids in the marginal seas mostly originated from outside the subtropical gyre, while the squids in the subtropical gyre had various sources, including outside the gyre and southern and northern parts within the gyre, revealing a complex mixing pattern of the species. These results show that isotope chronology combined with baseline isoscapes are effective tools to understand animal migrations, which can help managing various cephalopods and fish.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2004 - Study on the fisheries biology of diamond squid Thysanoteuthis rhombus in the Ogasawara Islands Waters, Southern Japan
- 2021 - Multi-decadal trends in contingent mixing of Atlantic mackerel (Scomber scombrus) in the Northwest Atlantic from otolith stable isotopes [Crossref]
- 2012 - Tracking habitat and resource use for the jumbo squid Dosidicus gigas: a stable isotope analysis in the Northern Humboldt Current System [Crossref]
- 2013 - Squid as nutrient vectors linking Southwest Atlantic marine ecosystems [Crossref]
- 2021 - Stock assessment and management of cephalopods: advances and challenges for short-lived fishery resources [Crossref]
- 2015 - World squid fisheries [Crossref]
- 1992 - Coincident loss of mitochondria and nuclei during lens fiber cell differentiation [Crossref]
- 1996 - Stable isotopes in southern right whale (Eubalaena australis) baleen as indicators of seasonal movements, feeding and growth [Crossref]
- 2011 - Tracking apex marine predator movements in a dynamic ocean [Crossref]
- 2004 - Ageing and vision: structure, stability and function of lens crystallins [Crossref]