Size-dependent growth tactics of a partially migratory fish before migration
Size-dependent growth tactics of a partially migratory fish before migration
复制标题
部分洄游鱼类在迁徙前依赖于体型的生长策略
DOI:
10.1007/s00442-022-05111-0
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发表时间:
2022
期刊:
影响因子:
2.7
通讯作者:
Kishida Osamu
中科院分区:
文献类型:
--
作者:
Futamura Ryo;Morita Kentaro;Kanno Yoichiro;Kumikawa Shoji;Matsuoka Yuichi;Okuda Atsushi;Sugiyama Hiroshi;Takahashi Hiroyuki;Uchida Jiro;Kishida Osamu
In many migratory species, smaller migrants suffer higher mortality rates during the risky migration. To minimize the size-selective mortality, migrants with smaller body sizes would need to accelerate growth rates or delay migration timing to attain a large enough body size prior to migration. To test these predictions, we investigated size-dependent patterns of growth rates and migration timing of juvenile masu salmon (Oncorhynchus masou) before their oceanic migration. We tracked uniquely marked individuals in a study population consisted of oceanic migrants and river-dwelling residents using mark-recapture surveys and PIT-tag antenna-reader system. Data supported our predictions about size-dependent growth rates and migration timing. For approximately 6 months before outmigration (i.e., between the decision of migration and the start of migration), eventual migrants grew more than residents if their initial size was smaller, but such a difference in growth rate diminished for fish with larger initial sizes. In addition, smaller eventual migrants delayed the timing of outmigration compared to larger individuals, to attain a larger body size in the river prior to migration. These results suggest that size-selective mortality during migration has shaped size-dependent patterns of the pre-migration growth in migratory masu salmon. Size-conditional changes in growth rate and duration of pre-migration period may be an adaptive tactic for the migratory animals.
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DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
L. Nøttestad;J. Giske;J. Holst;G. Huse
通讯作者:
G. Huse
影响因子:
2
作者:
D. Rowe;J. Thorpe
通讯作者:
J. Thorpe
影响因子:
3.4
作者:
Chapman, Ben B.;Bronmark, Christer;Hansson, Lars-Anders
通讯作者:
Hansson, Lars-Anders
影响因子:
0.4
作者:
K. Shimoda;K. Naito;M. Nakajima;Y. Sasaki;N. Misaka;K. Imada
通讯作者:
K. Imada
影响因子:
4.8
作者:
CHAPLIN, SB;CHAPLIN, SJ
通讯作者:
CHAPLIN, SJ