An holistic approach to fish stock identification

Begg, Gavin A.; Waldman, John R.

doi:10.1016/s0165-7836(99)00065-x

Cited by 447 publications

(349 citation statements)

References 51 publications

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“…This introduces uncertainty when assigning samples of unknown origin to their parent stock. Combining information from different sources in a holistic approach to stock identification can improve the accuracy of stock discrimination and provide greater insight into stock structure and the mechanisms that underlie it (Begg and Waldman 1999;Cadrin et al 2010;Baldwin et al 2012). Proper integration of the information provided by multiple stock markers requires careful consideration and coordination of sampling strategies (Abaunza et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Brophy

Haynes

Arrizabalaga

et al. 2016

Mar. Freshwater Res.

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Abstract. Two stocks of bluefin tuna (Thunnus thynnus) inhabit the north Atlantic; the western and eastern stocks spawn in the Gulf of Mexico and the Mediterranean Sea respectively. Trans-Atlantic movements occur outside spawning time whereas natal homing maintains stock structure. Commercial fisheries may exploit a mixed assemblage of both stocks. The incorporation of mixing rates into stock assessment is precluded by uncertainties surrounding stock discrimination. Otolith shape descriptors were used to characterise western and eastern stocks of Atlantic bluefin tuna in the present study and to estimate stock composition in catches of unknown origin. Otolith shape varied with length and between locations and years. Within a restricted size range (200-297-cm fork length (FL)) the two stocks were distinguished with an accuracy of 83%. Bayesian stock mixture analysis indicated that samples from the east Atlantic and Mediterranean were predominantly of eastern origin. The proportion assigned to the eastern stock showed slight spatial variation; however, overlapping 95% credible intervals indicated no significant difference (200-297 cm FL: central Atlantic, 73-100%; Straits of Gibraltar, 73-100%; Morocco, 50-99%; Portugal 64-100%). Otolith shape could be used in combination with other population markers to improve the accuracy of mixing rate estimates for Atlantic bluefin tuna.

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Section: Discussionmentioning

confidence: 99%

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Brophy

Haynes

Arrizabalaga

et al. 2016

Mar. Freshwater Res.

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“…Given the variety of stock identification tools available, combining results from several techniques may provide valuable insights into the possible stock structure of a species (Begg and Waldman 1999). Combining genetic analysis with morphometrics should lead to a better understanding of both (Winans 1987) and provide a means for successful ecological-genetic population matching (Taylor 1991).…”

Section: Discussionmentioning

confidence: 99%

Marine Growth and Morphometrics for Three Populations of Atlantic Salmon from Eastern Maine, USA

et al. 2005

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Significant differences in growth and prespawning body morphology were detected among three stocks of Atlantic salmon reared in a common marine environment. Smolts originating from river‐specific broodstock of the Machias, East Machias, and Dennys populations were reared at two marine net‐pen facilities for 25 months. Significant differences in stock‐specific growth were observed among two stocks at both sites, suggesting a genetic basis for the observed phenotypic variation. There was a significant stock effect to the total measured phenotypic variation based on collected truss network analyses. Linear discriminant function analysis of a truss network of morphometric distances allowed for 73% accuracy of stock classification. A thin‐plate spline procedure characterized the Machias body form as having a shortened narrow caudal peduncle region, a compressed body with an elongated trunk, and a deeper head region relative to the other two stocks. Phenotypic variation may be associated with hydrological characteristics of the Machias watershed.

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“…Different approaches have been used in identifying stocks, including catch data, life-history characteristics, mark-recapture, otolith microchemistry, morphometrics, genetics and parasites, with holistic approaches, involving a broad spectrum of complementary techniques, being recommended for future stock identification studies (Begg and Waldman, 1999).…”

Section: A R I N E P a R A S I T E S I N F I S H E R I E Smentioning

confidence: 99%

Parasites in fisheries and mariculture

Timi

MacKenzie

2015

Parasitology

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Traditionally, parasitology has been concerned with the harmful effects of parasitic organisms; it is basically an applied science. Since its founding in the field of medicine, and later in veterinary medicine, parasitology has been mainly devoted to generating knowledge, which is applicable to parasite control and management, and eventually to their eradication. However, the complexity of parasitism, as revealed over recent decades by workers in various specialisms of parasitology, makes the application of management and control measures very difficult in natural environments. This is particularly true in the marine realm, where however some applied aspects of parasitology, other than those devoted to control and management of parasites, have been shown to be of great importance for fisheries, human health, biological control of introduced species and environmental sciences (Rohde, 2002). The relationship of parasitology with mariculture practices, which are carried out mostly on artificial and controlled systems, follows a more classical approach, focusing on the development of strategies of prevention, management and control of pathogens.

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An holistic approach to fish stock identification

Cited by 447 publications

References 51 publications

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)

Marine Growth and Morphometrics for Three Populations of Atlantic Salmon from Eastern Maine, USA

Parasites in fisheries and mariculture

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