Vulnerability Assessment of Pelagic Sharks in the Western North Pacific by Using an Integrated Ecological Risk Assessment
| Autor: | Lung-Hsin Huang, Kuan-Yu Su, Kwang-Ming Liu, Shoou-Jeng Joung |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
productivity Veterinary medicine fishing impact 01 natural sciences Article susceptibility Vulnerability assessment SF600-1100 Population growth IUCN Red List Dusky shark Sandbar shark General Veterinary biology 010604 marine biology & hydrobiology Silky shark Pelagic zone 04 agricultural and veterinary sciences intrinsic rate of population growth biology.organism_classification Fishery demographic analysis Geography Productivity (ecology) QL1-991 040102 fisheries 0401 agriculture forestry and fisheries Animal Science and Zoology Zoology |
| Zdroj: | Animals, Vol 11, Iss 2161, p 2161 (2021) Animals Volume 11 Issue 8 Animals : an Open Access Journal from MDPI |
| ISSN: | 2076-2615 |
| Popis: | Simple Summary A new integrated ecological risk assessment (ERA) including the IUCN Red List category, the body weight variation trend of 1989–2011 with large sample size (n > 678,000), and the inflection point of population growth curve coupled with the ERA was developed to assess the impact of longline fishery on the pelagic sharks in the western North Pacific. The intrinsic rate of population growth was used to estimate the productivity, and the susceptibility was estimated by the multiplication of the catchability, selectivity, and post-capture mortality. Five groups were identified based on the cluster analysis coupling with non-parametric multi-dimensional scaling. Rigorous management measures are recommended for the scalloped hammerhead, silky, and spinner shark at highest risk, setting total allowable catch quota is recommended for the bigeye thresher, and sandbar shark, and a consistent monitoring scheme is suggested for the smooth hammerhead, shortfin mako, pelagic thresher, oceanic whitetip, and dusky shark. Abstract The vulnerability of 11 pelagic shark species caught by the Taiwanese coastal and offshore longline fisheries in the western North Pacific were assessed by an ecological risk assessment (ERA) and 10 of the 11 species was assessed by using an integrated ERA developed in this study. The intrinsic rate of population growth was used to estimate the productivity of sharks, and the susceptibility of sharks was estimated by the multiplication of the catchability, selectivity, and post-capture mortality. Three indices namely, the IUCN Red List category, the body weight variation trend, and the inflection point of population growth curve coupled with ERA were used to conduct an integrated ERA. The results indicated that the scalloped hammerhead is at the highest risk (group 1), followed by the silky shark, and the spinner shark at high risk (group 2). The bigeye thresher, and sandbar shark fall in group 3, the smooth hammerhead falls in group 4, and the shortfin mako, pelagic thresher, oceanic whitetip, and dusky shark fall in group 5. Rigorous management measures for the species in groups 1 and 2, setting total allowable catch quota for group 3, and consistent monitoring schemes for groups 4 and 5 are recommended. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|