Investigating the genetic stock structure of blue marlin (Makaira nigricans) in the Pacific Ocean

Williams, Samuel M.; Wyatt, Jamie; Ovenden, Jennifer R.

doi:10.1016/j.fishres.2020.105565

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…The combined catches of these fisheries have led to a listing of vulnerable by the International Union for Conservation and Nature (Collette et al, 2011). Blue marlin is considered a single global species (Collette et al, 2006) with separate stocks in the Atlantic, Pacific and Indian Oceans (Graves & McDowell, 2001; Hinton, 2001; Williams et al, 2020), although information on blue marlin in the Indian Ocean is limited (Graves & McDowell, 2015). However, recent genetic evidence suggests blue marlin in the Pacific and eastern Indian Oceans constitute a single stock (Chen et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Global habitat loss of a highly migratory predator, the blue marlin (Makaira nigricans)

Dale

Brodie

Carlisle

et al. 2022

Diversity and Distributions

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Aim Climate change is driving the redistribution of species throughout the oceans. However, the speed and magnitude of species responses, including shifts in their distribution, are variable and species specific. Quantifying the effect of environmental conditions on species distributions is crucial to informing management and conservation efforts. Blue marlin (Makaira nigricans) is a wide‐ranging top predator occurring circumglobally in tropical and subtropical waters and is heavily impacted by international longline fisheries. This study aimed to predict the global distribution of blue marlin and characterize the effects of climate variability thereon. Location Global. Methods To conduct this study, pop‐up satellite archival tags (n = 144) deployed by recreational anglers through a global citizen science programme were used to generate a large tracking data set (14,928 days, 210,983 km from deployment to pop‐up locations) of blue marlin movement across three ocean basins. State‐space modelled tracking position estimates were used to create a species distribution model to represent global habitat suitability for blue marlin. Habitat suitability was determined by fitting a generalized additive mixed model (GAMM) as a function of environmental covariates which was used to predict monthly global blue marlin habitat from 2000 to 2016. Results Blue marlin habitat preference had the strongest association with sea surface temperature. Seasonal variation in blue marlin habitat occurs primarily at the latitudinal edges of the distribution range. Over the duration of the study, 96% of core habitat declined in suitability, with a concurrent poleward increase in suitability of marginal habitat. Main Conclusions This study highlights the successful application of citizen‐based science to develop a long‐term global telemetry dataset. The present‐day loss of highly suitable habitat suggests ocean warming may be making equatorial waters less suitable even to highly mobile species. Blue marlin is likely to respond by following preferred habitat as it shifts poleward.

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Section: Introductionmentioning

confidence: 99%

Global habitat loss of a highly migratory predator, the blue marlin (Makaira nigricans)

Dale

Brodie

Carlisle

et al. 2022

Diversity and Distributions

View full text Add to dashboard Cite

show abstract

“…The last IUCN assessment in 2010 classified the species globally as VU (Collette et al 2022). Molecular analysis (Graves and McDowell 2003) and fishery catch rates data suggest the existence of a unique stock for blue marlin in the Pacific Ocean, currently corroborated by genetic data (Kleiber et al 2003;Williams et al 2020).…”

Section: Cites or Iucn Categoriesmentioning

confidence: 80%

Fishery and conservation implications of molecular characterization and traceability of ceviche samples from Pacific Panama

Díaz-Ferguson,

Justo,

Del Cid

et al. 2023

Mar Fish Sci

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Genetic analysis of 111 samples from ceviche cocktails and fish fillets used for ceviche, obtained from fish markets and processing plants in the Pacific zone of Panama were conducted to determine species composition, trace origin (native, nonnative or imported frozen species) and CITES species status. A total of 21 species were detected (20 fishes and one invertebrate): Coryphaena hippurus (dolphin fish), Pangasianodon hypophthalmus (basa), Trachinotus falcatus (pompano), Cyclopsetta querna (toothed flounder), Atheresthes stomias (arrow-tooth flounder), Lobotes pacificus (Pacific tripletail), Bagre panamensis (Chihuil sea-catfish), B. bagre (Coco sea-catfish), Ariopsis seemanni (Tete sea-catfish), Aspistor luniscutis (yellow sea-catfish), Centropomus viridis (white snook), C. undecimalis (Union snook), Sphyrae naensis (Mexican barracuda), Oreochromis niloticus (Nile tilapia), O. mossambicus (Mozambique tilapia), Cynoscion praedatorius (Boccone weakfish), Protonibea diacanthus (blackspotted croaker), Gadus chalcogrammus (Alaska pollock), Sphyrna lewini (scalloped hammerhead shark), Makaira nigricans (blue marlin) and Dosidicus gigas (giant Humbolt squid). Native species found in ceviche samples were reduced in numbers compared with imported and cultivated ones. Thus, the most common detected fish species was basa, followed by the Nile tilapia and the dolphin fish. This is a positive result in terms of sustainability of local fisheries, since basa is imported as frozen fish meat from Asia. The same applies for Nile tilapia, a cultivated freshwater species not captured from local fisheries. For the dolphin fish, despite being common and exploited in Pacific waters, previous studies suggest its fishery is sustainable in Panama waters. In terms of conservation status, one species cataloged by IUCN as vulnerable (VU), the blue marlin (M. nigricans) and one as critically endangered (CR), the scalloped hammerhead shark (S. lewini) were detected. Sphyrae lewini is also catalog as CITES appendix II. The giant Humbolt squid (D. gigas), classified by IUCN as data deficient (DD), was the only invertebrate detected in samples obtained from a ceviche processing plant. Two sets of primers and dual labeled probes were designed for qPCR eDNA detection of the only CITES species, S. lewini. These represent the first qPCR markers for eDNA detection of S. lewini. Results from this project promote the sustainable use of fishery resources and might provide ceviche producers with a certificate from MarViva Foundation certifying that their ceviche is free of sharks or species threatened/protected by law, giving added value to their product. Molecular detection and molecular traceability are sensitive and species specific, what makes of this tool a reliable method to combat IUU (illegal, unreported and undocumented) fishing.

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Spatial segregation by size of billfishes bycaught by the tuna purse-seine fishery in the Eastern Pacific Ocean

et al. 2021

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Investigating the genetic stock structure of blue marlin (Makaira nigricans) in the Pacific Ocean

Cited by 8 publications

References 25 publications

Global habitat loss of a highly migratory predator, the blue marlin (Makaira nigricans)

Global habitat loss of a highly migratory predator, the blue marlin (Makaira nigricans)

Fishery and conservation implications of molecular characterization and traceability of ceviche samples from Pacific Panama

Spatial segregation by size of billfishes bycaught by the tuna purse-seine fishery in the Eastern Pacific Ocean

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