Viability of the Critically Endangered eastern Taiwan Strait population of Indo-Pacific humpback dolphins Sousa chinensis

摘要: The population of humpback dolphins Sousa chinensis that resides in the eastern Taiwan Strait (ETS) is geographically and genetically isolated from populations inhabiting coastal waters mainland China appears to be facing unsustainable levels human threats. Using VORTEX 9.99b, we modeled viability this Critically Endangered under present conditions as well realistic additional threat scenarios. We examined 6 differ- ent bycatch mortality, 3 scenarios habitat loss/degradation, which these threats were experienced together. Under baseline (present) scenario, exhibited a decreasing growth rate was predicted smaller than initial size more 76% all model runs. In with threats, proportion runs varied 77.1 92.6%. Over short term, fisheries-related mortality have obvious impact on pop- ulation's trajectory loss/degradation. Even minimal increases current will increase probability extinction population. Due fragile situation ETS dolphins, mitigation actions reduce are needed immediately.