期刊
ENVIRONMENTAL BIOLOGY OF FISHES
卷 96, 期 8, 页码 907-914出版社
SPRINGER
DOI: 10.1007/s10641-012-0086-2
关键词
Batoid; Life history; Growth parameters; Age assessment
资金
- project Historia Natural, Movimientos, Pesqueria y Criaderos, Administracion de Mantas Mobulidas en el Golfo de California of the Monterey Bay Aquarium
Age assessment of Mobula japanica may be possible using the caudal vertebrae, below the origin of the dorsal fin. This is supported by the significant linear relationship found between disc width (DW) and centrum radius (CR, n = 55), the continuous record of growth bands in the vertebrae, the clarity to distinguish and count growth bands, and the precision of the band counts. Assuming an annual band formation, the preliminary assessment of the age suggests that M. japanica lives at least 14 years and has a low growth rate (K = 0.28 year(-1)). The minimum number of growth bands was one for spinetail devilrays with a 1,210-1,390 mm DW, while the maximum was 14 for a 2,300 mm DW devilray. While age validation is still required, results indicate the feasibility of the use of caudal vertebrae for age estimation. To provide robust estimates of validated age and growth for the spinetail devilray, the sampling coverage needed might imply an international cooperation.
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