Logan Ryan K, White Connor F, Winkler Chuck, Jorgensen Salvador J, O'Sullivan John B, Lowe Christopher G, Lyons Kady
Department of Biological Sciences, California State University Long Beach, Bellflower, California.
Aquatic Research Consultants, San Pedro, California.
J Fish Biol. 2018 Nov;93(5):842-849. doi: 10.1111/jfb.13785. Epub 2018 Oct 29.
Length, mass and girth relationships are presented for 112 juvenile white sharks (JWS) Carcharodon carcharias caught in the Southern California Bight (SCB) nursery area between June 2008 and August 2017. No difference was found between male and female JWS length-mass relationships, but data suggest that JWS in the SCB gain more mass per unit length for the juvenile size classes compared with other C. carcharias populations. Condition-factor-to-liver-mass and condition-factor-to-liver-lipid-content relationships revealed that length and mass (i.e., condition factor) can be used as a non-invasive proxy for body condition for juveniles of this species. The parameters estimated in this study are key information for population assessments of juvenile C. carcharias in the north-east Pacific Ocean and will contribute to the conservation and management of this IUCN Red List Vulnerable species.
本文呈现了2008年6月至2017年8月间在南加利福尼亚湾（SCB）育幼区捕获的112条幼年大白鲨（JWS）噬人鲨的体长、体重和体围关系。未发现雄性和雌性JWS体长与体重关系存在差异，但数据表明，与其他噬人鲨种群相比，SCB中的JWS在幼鱼体型阶段每单位体长增加的体重更多。条件因子与肝脏质量以及条件因子与肝脏脂质含量的关系表明，体长和体重（即条件因子）可作为该物种幼鱼身体状况的非侵入性指标。本研究估算的参数是东北太平洋幼年噬人鲨种群评估的关键信息，将有助于对这一世界自然保护联盟红色名录中的易危物种进行保护和管理。
