DOI: 10.1111/gcb.13670
论文题名: Varying demographic impacts of different fisheries on three Mediterranean seabird species
作者: Genovart M. ; Doak D.F. ; Igual J.-M. ; Sponza S. ; Kralj J. ; Oro D.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期: 8 起始页码: 3012
结束页码: 3029
语种: 英语
英文关键词: bycatch
; conservation
; marine predators
; multi-event capture–recapture
; parameter uncertainty
; population models
; PVA
; seabirds
; stochasticity
; survival
Scopus关键词: Procellariidae
英文摘要: Fisheries have an enormous economic importance, but reconciling their socio-economic features with the conservation and sustainability of marine ecosystems presents major challenges. Bycatch mortality from fisheries is clearly among the most serious global threats for marine ecosystems, affecting a wide range of top predators. Recent estimates report ca. 200,000 seabirds killed annually by bycatch in European waters. However, there is an urgent need to rigorously estimate actual mortality rates and quantify effects of bycatch on populations. The Mediterranean Sea is one of the most impacted regions. Here, we estimate for the first time both bycatch mortality rates and their population-level effects on three endemic and vulnerable Mediterranean taxa: Scopoli's shearwater, Mediterranean shag, and Audouin's gull, that die in different types of fishing gears: longlines, gillnets and sport trolling, respectively. We use multi-event capture–recapture modelling to estimate crucial demographic parameters, including the probabilities of dying in different fishing gears. We then build stochastic demography models to forecast the viability of the populations under different management scenarios. Longline bycatch was particularly severe for adults of Scopoli's shearwaters and Audouin's gulls (ca. 28% and 23% of total mortality, respectively) and also for immature gulls (ca. 90% of mortality). Gillnets had a lower impact, but were still responsible for ca. 9% of juvenile mortality on shags, whereas sport trolling only slightly influenced total mortality in gulls. Bycatch mortality has high population-level impacts in all three species, with shearwaters having the highest extinction risk under current mortality rates. Different life-history traits and compensatory demographic mechanisms between the three species are probably influencing the different bycatch impact: for shearwaters, urgent conservation actions are required to ensure the viability of their populations. Results will be very useful for guiding future seabird conservation policies and moving towards an ecosystem-based approach to sustainable fisheries management. © 2017 John Wiley & Sons Ltd 资助项目: Genovart, M.
; Population Ecology Group, IMEDEA (CSIC-UIB)Spain
; 电子邮件: xell@imedea.uib-csic.es
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60870
Appears in Collections: 影响、适应和脆弱性
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作者单位: Population Ecology Group, IMEDEA (CSIC-UIB), Esporles, Spain; Environmental Studies Program, 397 UCB University of Colorado, Boulder, CO, United States; CEAB (CSIC), Girona, Spain; Department of Mathematics and Geosciences, University of Trieste, Trieste, Italy; Institute of Ornithology, CASA, Zagreb, Croatia
Recommended Citation:
Genovart M.,Doak D.F.,Igual J.-M.,et al. Varying demographic impacts of different fisheries on three Mediterranean seabird species[J]. Global Change Biology,2017-01-01,23(8)