Japanese and Taiwanese pelagic longline fleet dynamics and the impacts of climate change in the southern Indian Ocean

Michael, Pamela E.; Wilcox, Chris; Tuck, Geoffrey N.; Hobday, Alistair J.; Strutton, Peter G.

doi:10.1016/j.dsr2.2016.12.003

Cited by 13 publications

(11 citation statements)

References 41 publications

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“…Here, we did not take into account changes in the depth of fishing effort, but PS fishing may be more affected than other methods such as longline fisheries that can set hooks at greater depths (Marsac, ). Regarding latitudinal shifts, PS vessels in the east Atlantic Ocean are already going further south and north from the equator due to technological advances among other factors, but this also leads to increased fuel costs (see also Michael et al, ). Thus, home port location could become limiting if species shift further away.…”

Section: Discussionmentioning

confidence: 99%

“…Considerable effort has been expended on projecting tropical tuna fisheries activity under climate change scenarios (Asch, Cheung, & Reygondeau, ; Dell, Wilcox, Matear, Chamberlain, & Hobday, ; Lehodey et al, ; Michael, Wilcox, Tuck, Hobday, & Strutton, ; Yen, Su, Teemari, Lee, & Lu, ), but there is still little evidence showing impacts of climate change on the activity of fleets targeting tropical tunas (Monllor‐Hurtado, Pennino, & Sanchez‐Lizaso, ) or the consequences for dependent societies, economies and fisheries governance (Dueri et al, ; McIlgorm et al, ; Mullon et al, ). Regarding institutions, mainly two Regional Fisheries Management Organizations (RFMOs) take into account climate change considerations (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Southward re‐distribution of tropical tuna fisheries activity can be explained by technological and management change

et al. 2020

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There is broad evidence of climate change causing shifts in fish distribution worldwide, but less is known about the response of fisheries to these changes. Responses to climate‐driven shifts in a fishery may be constrained by existing management or institutional arrangements and technological settings. In order to understand how fisheries are responding to ocean warming, we investigate purse seine fleets targeting tropical tunas in the east Atlantic Ocean using effort and sea surface temperature anomaly (SSTA) data from 1991 to 2017. An analysis of the spatial change in effort using a centre of gravity approach and empirical orthogonal functions is used to assess the spatiotemporal changes in effort anomalies and investigate links to SSTA. Both analyses indicate that effort shifts southward from the equator, while no clear pattern is seen northward from the equator. Random forest models show that while technology and institutional settings better explain total effort, SSTA is playing a role when explaining the spatiotemporal changes of effort, together with management and international agreements. These results show the potential of management to minimize the impacts of climate change on fisheries activity. Our results provide guidance for improved understanding about how climate, management and governance interact in tropical tuna fisheries, with methods that are replicable and transferable. Future actions should take into account all these elements in order to plan successful adaptation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Southward re‐distribution of tropical tuna fisheries activity can be explained by technological and management change

et al. 2020

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“…Climate-driven changes in the productivity and distribution of marine fish stocks targeted for commercial use are being observed and predicted globally (Cheung et al, 2009(Cheung et al, , 2010Hiddink et al, 2015;Weatherdon et al, 2016). Secondary effects in fisheries in the form of changing fleet dynamics, fishing location choices, gear deployment, targeting and discarding behaviors, supplies to market and ultimately, social and economic returns from these fisheries, are increasingly evident (Michael et al, 2017;Senapati and Gupta, 2017;Stoeckl et al, 2017). This is particularly the case in marine warming "hot spot" areas (Dulvy et al, 2008;Pecl et al, 2014a;Caputi et al, 2016), such as Australia's southeastern marine region where exposure to climate-driven changes and sensitivity, for a number of species, is high (Pecl et al, 2014cChampion et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Responding to Climate Change: Participatory Evaluation of Adaptation Options for Key Marine Fisheries in Australia’s South East

et al. 2020

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Planned adaptation to climate impacts and subsequent vulnerabilities will necessarily interact with autonomous responses enabled within existing fisheries management processes and initiated by the harvest and post-harvest components of fishing industries. Optimal adaptation options are those which enable negative effects to be mitigated and opportunities that arise to be maximized, both in relation to specific climate-driven changes and the broader fisheries system. We developed a two-step participatory approach to evaluating adaption options for key fisheries in the fastwarming hotspot of south-eastern Australia. Four fisheries (southern rock lobster, abalone, snapper, and blue grenadier) were selected as case studies on the basis of their high to moderate vulnerability to climatic effects on species distribution and abundance. Involved stakeholders undertook a "first pass" screening assessment of options, by characterizing and then evaluating options. In the characterization step potential adaptation options for each fishery, contextualized by prior knowledge of each species' climate change exposure and sensitivity, were described using a characterization matrix. This matrix included: the specific climate vulnerability/challenges, the implications of each option on the fishery system as a whole, the temporal and spatial scales of implementation processes, and realized benefits and costs. In the evaluation step, semi-quantitative evaluation of options was undertaken by stakeholders scoring the anticipated performance of an option against a pre-determined set of criteria relating to perceived feasibility, risk (inclusive of potential costs), and benefit. Reduction of the total annual commercial catch as well as reductions in both effort and catch through spatial and temporal closures were the options scored as having the highest level of expected benefit and of feasibility and the lowest level of risk of negative outcomes overall. Our screening assessment represents a pragmatic approach to evaluate and compare support for and the effects of alternative adaptation options prior to committing to more detailed formal and resource intensive evaluation or implementation.

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“…In contrast to previous studies, Dufour et al (2010), this research is focused on modelling the albacore feeding migration on a monthly and spatially explicit basis and is restricted to Spanish fleet to avoid bias due to historic changes in the French fleet. This approach might be useful for predictions at both the mid-term temporal scale (i.e., 1-4 months) and the long-term (i.e., decades to centuries), which can be used to anticipate the impacts of climate change on the distribution, abundance and phenology of tuna (Christian & Holmes, 2016;Hobday, Spillman, Paige Eveson, & Hartog, 2016;Michael, Wilcox, Tuck, Hobday, & Strutton, 2017).…”

Section: Introductionmentioning

confidence: 99%

Earlier migration and distribution changes of albacore in the Northeast Atlantic

Chust¹,

Goikoetxea²,

Ibaibarriaga³

et al. 2019

Fisheries Oceanography

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Marine species have exhibited trends in their geographic distribution and phenology in recent decades, and these changes are triggered by climate variability or anthropogenic pressures. Northeast Atlantic albacore has recently been identified to show changes of this nature, although the underlying causes are still uncertain. The aim of this work was to analyse the Northeast Atlantic albacore distribution shifts and phenological changes during the trophic migration that juveniles undertake from late spring to autumn and to identify potential causes of such variability. Specifically, time series of albacore catches of the Basque trolling fleet were studied and compared with trends derived from a null ecological niche model using very large number of catch observations (27,982). The results showed an earlier albacore migration of 2.3 days per decade during the period of 1981–2017, which was partly associated with the recent warming of the sea. The trend analysis of the catch distribution also detected a significant north‐westward trend in catch observations and a northward trend in species habitat. In contrast, both latitudinal trends were uncorrelated. This result suggests that interannual species distribution shifts are mainly related to factors other than oceanic‐climatic variability, such as fleet behaviour or prey changes.

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Japanese and Taiwanese pelagic longline fleet dynamics and the impacts of climate change in the southern Indian Ocean

Cited by 13 publications

References 41 publications

Southward re‐distribution of tropical tuna fisheries activity can be explained by technological and management change

Southward re‐distribution of tropical tuna fisheries activity can be explained by technological and management change

Responding to Climate Change: Participatory Evaluation of Adaptation Options for Key Marine Fisheries in Australia’s South East

Earlier migration and distribution changes of albacore in the Northeast Atlantic

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