Operational modelling of bigeye tuna ( Thunnus obesus ) spatial dynamics in the Indonesian region

Lehodey, Patrick; Senina, Inna; Wibawa, Teja Arief; Titaud, Olivier; Calmettes, Beatriz; Conchon, Anna; Tranchant, B.; Gaspar, Philippe

doi:10.1016/j.marpolbul.2017.08.020

Cited by 17 publications

(21 citation statements)

References 25 publications

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“…Furthermore, the mortality due to fishing, and recruitment process may have an important impact on the total biomass of the species—such mechanisms have been included in some regional models (e.g., Lehodey et al. [, ], Senina et al. [, ]).…”

Section: Discussionmentioning

confidence: 99%

Large‐scale distribution of tuna species in a warming ocean

Erauskin-Extramiana

Arrizabalaga

Hobday

et al. 2019

Global Change Biology

105

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Tuna are globally distributed species of major commercial importance and some tuna species are a major source of protein in many countries. Tuna are characterized by dynamic distribution patterns that respond to climate variability and long‐term change. Here, we investigated the effect of environmental conditions on the worldwide distribution and relative abundance of six tuna species between 1958 and 2004 and estimated the expected end‐of‐the‐century changes based on a high‐greenhouse gas concentration scenario (RCP8.5). We created species distribution models using a long‐term Japanese longline fishery dataset and two‐step generalized additive models. Over the historical period, suitable habitats shifted poleward for 20 out of 22 tuna stocks, based on their gravity centre (GC) and/or one of their distribution limits. On average, tuna habitat distribution limits have shifted poleward 6.5 km per decade in the northern hemisphere and 5.5 km per decade in the southern hemisphere. Larger tuna distribution shifts and changes in abundance are expected in the future, especially by the end‐of‐the‐century (2080–2099). Temperate tunas (albacore, Atlantic bluefin, and southern bluefin) and the tropical bigeye tuna are expected to decline in the tropics and shift poleward. In contrast, skipjack and yellowfin tunas are projected to become more abundant in tropical areas as well as in most coastal countries' exclusive economic zones (EEZ). These results provide global information on the potential effects of climate change in tuna populations and can assist countries seeking to minimize these effects via adaptive management.

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Section: Discussionmentioning

confidence: 99%

Large‐scale distribution of tuna species in a warming ocean

Erauskin-Extramiana

Arrizabalaga

Hobday

et al. 2019

Global Change Biology

105

View full text Add to dashboard Cite

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“…A particularly promising example of what can be done is provided by the recent implementation of a regional operational model for the Indonesian Ministry of Fisheries. The system couples ocean circulation model and primary production derived from satellite ocean colour data with a model of intermediate trophic levels on the top of which are simulated the spatial dynamics of three exploited tuna species (Tranchant et al 2016;Lehodey et al 2018). Boundary conditions of the regional model are provided by the CMEMS global operational model.…”

Section: S48mentioning

confidence: 99%

Copernicus Marine Service Ocean State Report, Issue 3

Schuckmann¹,

Traon²,

Smith³

et al. 2019

Journal of Operational Oceanography

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“…Bigeye tuna ( Thunnus obesus ) is a species with a Pacific‐wide distribution across tropical and subtropical areas and sporadically extending into temperate waters (Lehodey et al., 2018; Matsumoto, Kitagawa, & Kimura, 2013; Schaefer & Fuller, 2010; Schaefer et al., 2015). The majority of adult individuals, which are of high commercial value, are targeted by fisheries and captured with subsurface deep‐set longline gear.…”

Section: Introductionmentioning

confidence: 99%