Adaptive and plastic variation in growth and maturation of the cutlassfish trichiurus japonicus in the subtropical Pacific Ocean
Journal
Fishery Bulletin
Journal Volume
116
Journal Issue
2
Pages
171
Date Issued
2018-02-21
Author(s)
Heino, Mikko
Abstract
© 2018, National Marine Fisheries Service. All rights reserved. We investigated variation in growth and maturation in response to 1) spatial variation in climate and 2) exploitation of the subtropical cutlassfish Trichiurus japonicus, an important fishery species whose population ecology i s virtually unknown. Individuals of this cutlassfish species were sampled monthly at 2 primary landing sites: Kengfang, in northeast (NE) Taiwan, and Tsukuan, in southwest (SW) Taiwan, during 2013–2015. Habitat temperatures were about 1–4°C lower at the NE site t han at the SW site, and the length at age of adult fish had a n inverse pattern with temperature (NE lengths > SW lengths at age). The probabilistic maturation reaction norms did not differ significantly between the 2 areas, but ages and lengths a t maturation were higher for males from NE than for males from SW. Differences in asymptotic lengths (NE>SW) and growth coefficients (NE
SDGs
Publisher
NATL MARINE FISHERIES SERVICE SCIENTIFIC PUBL OFFICE
Type
journal article