期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep33745
关键词
-
资金
- project Historia Natural, Movimientos, Pesqueria y Criaderos, Administracion de Mantas Mobulidas en el Golfo de California of the Monterey Bay Aquarium
- J. Abbott/M. Fretwell Graduate Fellowship in Fisheries Biology
- NSERC
- Canada Research Chair
- NSF Postdoctoral Fellowship in Math and Biology [DBI-1305929]
- John D. and Catherine T. MacArthur Foundation
- Leonardo DiCaprio Foundation
- Disney Conservation Fund
- Wildlife Conservation Society
Devil rays (Mobula spp.) face intensifying fishing pressure to meet the ongoing international demand for gill plates. The paucity of information on growth, mortality, and fishing effort for devil rays make quantifying population growth rates and extinction risk challenging. Furthermore, unlike manta rays (Manta spp.), devil rays have not been listed on CITES. Here, we use a published size-at-age dataset for the Spinetail Devil Ray (Mobula japanica), to estimate somatic growth rates, age at maturity, maximum age, and natural and fishing mortality. We then estimate a plausible distribution of the maximum intrinsic population growth rate (r(max)) and compare it to 95 other chondrichthyans. We find evidence that larger devil ray species have low somatic growth rate, low annual reproductive output, and low maximum population growth rates, suggesting they have low productivity. Fishing rates of a small-scale artisanal Mexican fishery were comparable to our estimate of r(max), and therefore probably unsustainable. Devil ray r(max) is very similar to that of manta rays, indicating devil rays can potentially be driven to local extinction at low levels of fishing mortality and that a similar degree of protection for both groups is warranted.
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