Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis

Despite the commercial importance of swordtip squid Uroteuthis edulis in Tsushima Strait, which lies between southwestern Japan and South Korea, data on its hatching grounds and migratory routes are lacking. To infer this information, we first revealed a significant negative correlation between ambi...

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Autores principales:	T Yamaguchi, Y Kawakami, M Matsuyama
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Biology (General) QH301-705.5 Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/ba1eee174f17403f86522d6c55f80a2b
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spelling	oai:doaj.org-article:ba1eee174f17403f86522d6c55f80a2b2021-11-18T09:17:25ZMigratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis1864-77821864-779010.3354/ab00635https://doaj.org/article/ba1eee174f17403f86522d6c55f80a2b2015-09-01T00:00:00Zhttps://www.int-res.com/abstracts/ab/v24/n1/p53-60/https://doaj.org/toc/1864-7782https://doaj.org/toc/1864-7790Despite the commercial importance of swordtip squid Uroteuthis edulis in Tsushima Strait, which lies between southwestern Japan and South Korea, data on its hatching grounds and migratory routes are lacking. To infer this information, we first revealed a significant negative correlation between ambient water temperatures and strontium:calcium (Sr:Ca) ratios in squid statoliths through tank experiments. Next, we counted statolith microincrements in spring and summer migratory groups of the species to elucidate their hatching dates, after measuring Sr:Ca ratios from the nucleus to the edge of each statolith. Based on these methods, spring and summer groups appear to inhabit the southern East China Sea as juveniles, and move northeastward with currents along shelf edges in the Kuroshio region. However, individuals in the spring group are apparently affected by cold waters in the northern East China Sea before reaching the Tsushima Strait, likely resulting in the unique characteristics of this seasonal group. In contrast, those in the summer group are likely unaffected because of higher water temperatures in summer than in spring. This study is the first to infer the migratory routes of the spring and summer groups of the swordtip squid.T YamaguchiY KawakamiM MatsuyamaInter-ResearcharticleBiology (General)QH301-705.5MicrobiologyQR1-502ENAquatic Biology, Vol 24, Iss 1, Pp 53-60 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5 Microbiology QR1-502
spellingShingle	Biology (General) QH301-705.5 Microbiology QR1-502 T Yamaguchi Y Kawakami M Matsuyama Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
description	Despite the commercial importance of swordtip squid Uroteuthis edulis in Tsushima Strait, which lies between southwestern Japan and South Korea, data on its hatching grounds and migratory routes are lacking. To infer this information, we first revealed a significant negative correlation between ambient water temperatures and strontium:calcium (Sr:Ca) ratios in squid statoliths through tank experiments. Next, we counted statolith microincrements in spring and summer migratory groups of the species to elucidate their hatching dates, after measuring Sr:Ca ratios from the nucleus to the edge of each statolith. Based on these methods, spring and summer groups appear to inhabit the southern East China Sea as juveniles, and move northeastward with currents along shelf edges in the Kuroshio region. However, individuals in the spring group are apparently affected by cold waters in the northern East China Sea before reaching the Tsushima Strait, likely resulting in the unique characteristics of this seasonal group. In contrast, those in the summer group are likely unaffected because of higher water temperatures in summer than in spring. This study is the first to infer the migratory routes of the spring and summer groups of the swordtip squid.
format	article
author	T Yamaguchi Y Kawakami M Matsuyama
author_facet	T Yamaguchi Y Kawakami M Matsuyama
author_sort	T Yamaguchi
title	Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
title_short	Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
title_full	Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
title_fullStr	Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
title_full_unstemmed	Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis
title_sort	migratory routes of the swordtip squid uroteuthis edulis inferred from statolith analysis
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/ba1eee174f17403f86522d6c55f80a2b
work_keys_str_mv	AT tyamaguchi migratoryroutesoftheswordtipsquiduroteuthisedulisinferredfromstatolithanalysis AT ykawakami migratoryroutesoftheswordtipsquiduroteuthisedulisinferredfromstatolithanalysis AT mmatsuyama migratoryroutesoftheswordtipsquiduroteuthisedulisinferredfromstatolithanalysis
_version_	1718420925080141824

Migratory routes of the swordtip squid Uroteuthis edulis inferred from statolith analysis

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