Bycatch and discards by Taiwanese large-scale tuna longline fleets in the Indian Ocean

Huang, Hsin-Hsiung; Liu, Kwang‐Ming

doi:10.1016/j.fishres.2010.08.005

Cited by 67 publications

(48 citation statements)

References 45 publications

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“…There is a notable imbalance ([80% of peerreviewed papers) between studies focussing on elasmobranchs in the industrial and semi-industrial fisheries e.g. (Fennessy 1994;Huang and Liu 2010;Kiszka and van der Elst 2015;Romanov 2002) and the small-scale fisheries (Molina and Cooke 2012). Published information for small-scale fisheries is generally sparsely quantified and limited to target species (e.g.…”

Section: Elasmobranch Interaction With Small-scale Fisheriesmentioning

confidence: 99%

Marine megafauna interactions with small-scale fisheries in the southwestern Indian Ocean: a review of status and challenges for research and management

Temple

Kiszka

Stead

et al. 2017

Rev Fish Biol Fisheries

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In developing regions, coastal communities are particularly dependent on small-scale fisheries for food security and income. However, information on the scale and impacts of small-scale fisheries on coastal marine ecosystems are frequently lacking. Large marine vertebrates (marine mammals, sea turtles and chondrichthyans) are often among the first species to experience declines due to fisheries. This paper reviews the interactions between small-scale fisheries and vulnerable marine megafauna in the southwestern Indian Ocean. We highlight an urgent need for proper documentation, monitoring and assessment at the regional level of small-scale fisheries and the megafauna affected by them to inform evidence-based fisheries management. Catch and landings data are generally of poor quality and resolution with compositional data, where available, mostly anecdotal or heavily biased towards easily identifiable species. There is also limited understanding of fisheries effort, most of which relies on metrics unsuitable for proper assessment. Management strategies (where they exist) are often created without strong evidence bases or understanding of the reliance of fishers on resources. Consequently, it is not possible to effectively assess the current status and ensure the sustainability of these species groups; with indications 123Rev Fish Biol Fisheries (2018Fisheries ( ) 28:89-115 https://doi.org/10.1007 of overexploitation in several areas. To address these issues, a regionally collaborative approach between government and non-governmental organisations, independent researchers and institutions, and smallscale fisheries stakeholders is required. In combination with good governance practices, appropriate and effective, evidence-based management can be formulated to sustain these resources, the marine ecosystems they are intrinsically linked to and the livelihoods of coastal communities that are tied to them.

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Section: Elasmobranch Interaction With Small-scale Fisheriesmentioning

confidence: 99%

Marine megafauna interactions with small-scale fisheries in the southwestern Indian Ocean: a review of status and challenges for research and management

Temple

Kiszka

Stead

et al. 2017

Rev Fish Biol Fisheries

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“…In addition, age- and stage-structured population models explicitly modeling bycatch poorly fitted the observed data from the Crozet Islands [27]. This conundrum cannot be explained by the implementation of mitigating measures to reduce albatross bycatch, since (i) these measures were not adopted until the late 1990s and compliance was low in the first years of implementation [28], (ii) mitigation would have affected only the part of the fisheries that overlapped with the foraging areas of wandering albatrosses [28], (iii) albatross bycatch mortality remained high in tuna longline fleets in the southern Indian Ocean where similar, although less numerous, mitigation measures were implemented [29], and (iv) large Illegal Unreported and Unregulated (IUU) longline fishing fleets were operating from the mid-1990s until the mid-2000s [24], [28]. Therefore the increase in the population of wandering albatrosses at Possession Island, and at other breeding sites in the southern Indian Ocean, remains paradoxical [30], [31].…”

Section: Introductionmentioning

confidence: 99%

Fisheries Bycatch as an Inadvertent Human-Induced Evolutionary Mechanism

et al. 2013

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Selective harvesting of animals by humans can affect the sustainability and genetics of their wild populations. Bycatch - the accidental catch of non-target species - spans the spectrum of marine fauna and constitutes a harvesting pressure. Individual differences in attraction to fishing vessels and consequent susceptibility to bycatch exist, but few studies integrate this individual heterogeneity with demography. Here, we tested for the evidence and consequences of individual heterogeneity on the demography of the wandering albatross, a seabird heavily affected by fisheries bycatch. We found strong evidence for heterogeneity in survival with one group of individuals having a 5.2% lower annual survival probability than another group, and a decrease in the proportion of those individuals with the lowest survival in the population coinciding with a 7.5 fold increase in fishing effort in the foraging areas. Potential causes for the heterogeneity in survival are discussed and we suggest that bycatch removed a large proportion of individuals attracted by fishing vessels and had significant phenotypic and population consequences.

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“…While there exist a number of reports about such captures of albatrosses by fishing vessels (e.g., Gales et al 1998;Petersen et al 2009;Huang and Liu 2010), our record provides an example that such interactions may not be systematically lethal for the birds. In the present case, the albatross was released alive at sea and found more than 5 months later on a nest.…”

Section: Resultsmentioning

confidence: 84%

“…Wilson et al (2014) highlighted the paucity of reports on incidentally caught seabirds being released alive compared with other marine organisms. Few seabirds are usually able to escape from pelagic longline fishing gear indeed (but see Huang and Liu 2010), and as a result sub-lethal effects of bycatch remain virtually undocumented for seabirds today (as opposed to crustaceans and mammals, Wilson et al 2014). Indirect effects of incidental capture would thus need to be considered in future surveys of colonies with high risks of individual interaction with long-liners, in addition to the existing monitoring of fisheries-related items at seabird colonies (e.g., Nel and Nel 1999;Bugoni et al 2010;Phillips et al 2010).…”

Section: Resultsmentioning

confidence: 99%

The rime of the modern mariner: evidence for capture of yellow-nosed albatross from Amsterdam Island in Indian Ocean longline fisheries

et al. 2015

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International audienceCommercial fisheries currently pose a seriousthreat at sea to the conservation of a number of pelagicseabirds. However, these interactions are complex, andreports on population-specific bycatch in the high seas arescarce. Here we report the case of an Indian yellow-nosedalbatross Thalassarche carteri re-sighted on AmsterdamIsland after an apparent capture by an Indonesian longliner,as indicated by a message attached to the bird. Thisrecord demonstrates that Amsterdam birds may interactwith long-liners indeed, at least during winter, and thatsuch interactions are not systematically lethal. We suggestthat bycatch sub-lethal effects should be investigated atcolonies with high risks of individual capture at sea

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Bycatch and discards by Taiwanese large-scale tuna longline fleets in the Indian Ocean

Cited by 67 publications

References 45 publications

Marine megafauna interactions with small-scale fisheries in the southwestern Indian Ocean: a review of status and challenges for research and management

Marine megafauna interactions with small-scale fisheries in the southwestern Indian Ocean: a review of status and challenges for research and management

Fisheries Bycatch as an Inadvertent Human-Induced Evolutionary Mechanism

The rime of the modern mariner: evidence for capture of yellow-nosed albatross from Amsterdam Island in Indian Ocean longline fisheries

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