科研之友
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摘要
Growth of roosterfish (Nematistius pectoralis) was estimated by analyzing daily growth increments of sagittal otoliths collected from individuals captured in El Golfo Dulce, Costa Rica during 2013-2014 and in southern Baja California Sur, Mexico during 2010-2015. Isometric growth was observed for all individuals and no significant differences were observed in the length-weight relationships between sexes or locations. Age estimates ranged from 18 d (0.05 years) to 545 d (1.5 years), although 26% of otoliths (57-133 cm) were not legible because narrow daily growth increments were difficult to differentiate in older fish. Individual growth parameters indicate that roosterfish grow at a rapid rate during the first year of life, reaching sizes of around 60-70 cm in fork length. Although future field validation is necessary, the results of our study provide insight into the life history of this valuable resource of the eastern Pacific Ocean.
- 出版日期2017
