Adaptive and plastic variation in growth and maturation of the cutlassfish Trichiurus japonicus in the subtropical Pacific Ocean

作者：Wang Hui Yu^*; Heino Mikko

来源：Fishery Bulletin, 2018, 116(2): 171-182.

DOI：10.7755/FB.116.2.6

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 is 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 degrees C lower at the NE site than at the SW site, and the length at age of adult fish had an 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 at maturation were higher for males from NE than for males from SW. Differences in asymptotic lengths (NE>SW) and growth coefficients (NE

• 出版日期2018
• 单位国际应用系统分析学会(IIASA)