Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata, Argentina; Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo No. 1, B7602HSA, Mar del Plata, Argentina.
J Fish Biol. 2013 Nov;83(5):1354-70. doi: 10.1111/jfb.12238.
Age-0+ year juvenile Argentine hake Merluccius hubbsi (60-150 mm total length, L(T)) from San Jorge Gulf, north Patagonian shelf region of the Argentine Sea, had an almost exclusively pelagic diet dominated by the hyperiid amphipod Themisto gaudichaudii and the euphausiid Euphausia lucens. This suggested that final settlement and permanent demersal habitat utilization might not, as previously reported, occur at earlier sizes (c. 20 mm L(T)). Their feeding strategy involves specialization at a population level towards both the main pelagic prey, indicating a narrow trophic niche. Novel data are provided which contribute to the growing body of information in relation to the age-0+ year transitional stage in demersal fishes and particularly to M. hubbsi recruitment in the Argentine Sea.
年龄为 0+ 年的幼年阿根廷无须鳕 Merluccius hubbsi（全长 60-150 毫米，L(T)）来自阿根廷海北巴塔哥尼亚大陆架地区的圣豪尔赫湾，其饮食几乎完全是由长尾对虾属的异足端足目甲壳动物 Themisto gaudichaudii 和磷虾属的南极磷虾 Euphausia lucens 组成的浮游生物。这表明，最终的定居和永久性底栖生境利用可能不会像之前报道的那样在更早的尺寸（约 20 毫米 L(T)）发生。它们的觅食策略涉及到对主要浮游猎物的群体水平专业化，表明它们的营养生态位较窄。提供了新的数据，这些数据有助于增加有关底栖鱼类 0+ 年龄过渡阶段的信息量，特别是有助于了解阿根廷海域中 M. hubbsi 的补充情况。
