School of Biomedical Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia.
J Fish Biol. 2012 Apr;80(5):1213-26. doi: 10.1111/j.1095-8649.2011.03164.x. Epub 2011 Dec 1.
Between 2000 and 2002, three artisanal landing sites were sampled in southern Chile, with data on population structure and reproductive development collected from 5477 yellownose skates Zearaja chilensis. Total length (L(T) ) ranged from 33 to 158 cm for females and 34 to 155 cm for males. No sexual dimorphism was evident in disc size (length or width) or in L(T)-mass relationships. The smallest mature female was 95 cm L(T) and the size at which 50% were mature (L(T50) ) was 109 cm. Males matured between 80 and 90 cm L(T) with a L(T50) of 88 cm. Although the largest Z. chilensis captured by the artisanal fishery was 155 cm L(T) , 89% of landings comprised relatively small, immature fish. This situation may compromise the stock integrity if intrinsic vulnerability and probable long-life span of Z. chilensis are considered. Consequences for the survival of the species and possible signs of a fishery collapse must be reviewed by management authorities by consideration of both artisanal and industrial landings in Chile.
2000 年至 2002 年期间，在智利南部的三个手工捕捞点进行了采样，共收集了 5477 条黄鼻魟（Zearaja chilensis）的种群结构和生殖发育数据。雌性黄鼻魟的全长（L(T)）范围为 33 至 158 厘米，雄性为 34 至 155 厘米。在盘径（长度或宽度）或 L(T)-质量关系上，没有明显的性别二态性。最小的成熟雌性为 95 厘米 L(T)，50%成熟的大小（L(T50)）为 109 厘米。雄性在 80 至 90 厘米 L(T)时成熟，L(T50)为 88 厘米。尽管手工渔业捕获的最大黄鼻魟长 155 厘米，但 89%的渔获物都是相对较小、未成熟的鱼。如果考虑到黄鼻魟的内在脆弱性和可能的长寿命，这种情况可能会影响种群的完整性。管理当局必须考虑到智利的手工和工业捕捞，对该物种的生存和可能出现的渔业崩溃迹象进行审查。
