The management of the distant water tuna fishery in Taiwan

Ting, Kuo-Huan; Ou, Ching-Hsiewn; Liu, Wenhong

doi:10.1016/j.marpol.2012.03.009

Cited by 17 publications

(1 citation statement)

References 22 publications

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“…The recent regulations on seabird bycatch mitigation may have, in turn, affected fishing effort and distribution, as previously observed in the context of changed regulations (Haward and Bergin, , ; Tuck et al ., ; Huang, ; Ting et al ., ). This suggests that an update of the overlap analysis may be run again when new bycatch estimates become available in this region (reflecting the implementation of the most recent regulations), together with the up‐to‐date fishing effort dataset.…”

Section: Discussionmentioning

confidence: 97%

167 individuals versus millions of hooks: bycatch mitigation in longline fisheries underlies conservation of Amsterdam albatrosses

Thiebot

Delord

Barbraud

et al. 2015

Aquatic Conservation

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International audience1. Industrial fisheries represent one of the most serious threats worldwide to seabird conservation. Death ofbirds in fishing operations (i.e. bycatch) has especially adverse effects on populations of albatrosses, which haveextremely low fecundity.2. The single population worldwide of Amsterdam albatross (Diomedea amsterdamensis) comprises only 167individuals and risks considerable decline over the mid-term from additional mortality levels potentially inducedby fisheries. The priority actions listed in the current conservation plan for this species included characterizingthe longline fisheries operating within its range, dynamically analysing the overlap between albatrosses and thesefisheries, and providing fisheries management authorities with potential impact estimates of longline fisheries onthe Amsterdam albatross.3. During all life-cycle stages and year quarters the birds overlapped extensively with fishing effort in thesouthern Indian and Atlantic oceans. Fishing effort, and consequently overlap score (calculated as the productof fishing effort and time spent by the birds in a spatial unit) was highest in July–September (45% of the hooksannually deployed). Just three fleets (Taiwanese, Japanese and Spanish) contributed to >98% of the overlap scoresfor each stage (72% from the Taiwanese fleet alone, on average). Daily overlap scores were higher for thenon-breeding versus the breeding stages (3-fold factor on average).4. Based on previous bycatch rates for other albatross species, this study estimated that longline fisheriescurrently have the potential to remove ~2–16 individuals (i.e. ~5%) each year from the total Amsterdamalbatross population, depending on whether bycatch mitigation measures were or were not systematicallyemployed during the fishing operations.5. Recent bycatch mitigation measures may be instrumental in the conservation of the Amsterdamalbatross. This study suggests three further key recommendations: (1) to focus conservation efforts on theaustral winter; (2) to require all operating vessels to report ring recoveries; and (3) to allocate specialregulation of fishing operations in the areas of peak bycatch risk for the Amsterdam albatrosses

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