Management of Sharks and Their Relatives (Elasmobranchii)

Musick, John A.; Burgess, George H.; Cailliet, Gregor M.; Camhi, Merry; Fordham, Sonja V.

doi:10.1577/1548-8446(2000)025<0009:mosatr>2.0.co;2

Cited by 307 publications

(268 citation statements)

References 7 publications

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“…In contrast to teleost fishes, several studies have shown that elasmobranchs are remarkably susceptible to population decline and/or population collaps due to exhaustive exploitation (Kotas et al, 1995;Vooren, 1997;Musick et al, 2000;Baum et al, 2003).…”

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confidence: 99%

Discrimination of Shark species by simple PCR of 5S rDNA repeats

et al. 2008

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Sharks are suffering from intensive exploitation by worldwide fisheries leading to a severe decline in several populations in the last decades. The lack of biological data on a species-specific basis, associated with a k-strategist life history make it difficult to correctly manage and conserve these animals. The aim of the present study was to develop a DNA-based procedure to discriminate shark species by means of a rapid, low cost and easily applicable PCR analysis based on 5S rDNA repeat units amplification, in order to contribute conservation management of these animals. The generated agarose electrophoresis band patterns allowed to unequivocally distinguish eight shark species. The data showed for the first time that a simple PCR is able to discriminate elasmobranch species. The described 5S rDNA PCR approach generated species-specific genetic markers that should find broad application in fishery management and trade of sharks and their subproducts.

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confidence: 99%

Discrimination of Shark species by simple PCR of 5S rDNA repeats

et al. 2008

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“…The cartilaginous fish, which are completely discarded or evaluated as having low economic value, are not specifically targeted during fishing. Hence, the stocks of these species with low economic value face the unfortunate danger of crashing for a short time, according to Musick et al (2000). This leads to a considerable decrease in the cartilaginous fish populations, which, like other more economically valuable populations, form the upper ring of the food chain.…”

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confidence: 99%

Temporal changes in some Rajiformes species of cartilaginous fish (Chondrichthyes) from the west coast of İskenderun Bay (northeastern Mediterranean)

Yeldan¹,

Avşar²,

Mavruk³

et al. 2013

Turk J Zool

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“…Una de las categorías más importantes en la evaluación de stock es la estimación de la magnitud de los desembarques y la comercialización de las especies capturadas. El crecimiento de la economía Asiática durante la mitad de los años ochenta y comienzos de los noventa, provocó un aumento de 30 veces del valor por kilo de las aletas secas de tiburón (Musick et al 2000). De esta manera, se incentivó la pesquería mundial de tiburones y consecuentemente la práctica del corte de aletas o finning.…”

Section: Introduccionunclassified

Identificacion Morfologica De Las Aletas De Los Principales Tiburones Pelagicos Comercializados en Chile: Azulejo (Prionace Glauca Linnaeus), Marrajo (Isurus Oxyrhinchus Rafinesque), Y Tintorera (Lamna Nasus Bonnaterre)

2009

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RESUMENLa carencia de registros de desembarque especie-específicos ha producido dificultades en la evaluación de stock de tiburones en Chile. Debido a que los registros son insuficientes para realizar evaluaciones pesqueras, es imperativo contar con características fidedignas para la identificación de las especies o partes de éstas (como las aletas). El presente estudio describe caracteres morfológicos para la identificación de las aletas de las tres especies más importantes de tiburones pelágicos comercializados en Chile (P. glauca, I. oxyrhinchus y L. nasus) y provee de claves dicotómicas para la identificación de estas especies usando ya sea la aleta pectoral, la primera dorsal o la caudal. Los resultados revelaron que existen caracteres diagnósticos para identificar las aletas de cada una de estas especies. Ya que las especies estudiadas son las que más se comercializan, las descripciones de las aletas y las claves taxonómicas por tipo de aleta desarrolladas en este estudio prometen ser de gran utilidad para los fiscalizadores, en particular aquellos que se enfrenten a los desembarques de sacos de aletas. Además, el poder conocer tanto la cantidad como la proporción de especies comercializadas, es importante para futuras evaluaciones pesqueras y el establecimiento de planes de manejo especie-específicos. PALABRAS CLAVE: clave taxonómica, caracteres diagnósticos, corte de aleta, finning, patrón de coloración. ABSTRACTThe lack of species-specific landing records has produced difficulties in shark stock assessments in Chile. Given that the records are insufficient for fisheries assessments, it is imperative to have trustable morphological characteristics for the identification of species or parts of their bodies (such as fins). This study describes morphological characters useful for the identification of fins of the three main traded pelagic shark species (P. glauca, I. oxyrhinchus and L. nasus). Results showed that there are diagnostic morphological characters to identify the fins of these three species. Given that the studied species are the most traded ones, the descriptions of the fins and the taxonomic keys per fin type developed in this study should be of high use to monitor landings of shark, especially fins in sacs. The knowledge of the proportion of traded species and the quantity of each is important for future fisheries assessments and the establishment of management plans.

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Management of Sharks and Their Relatives (Elasmobranchii)

Cited by 307 publications

References 7 publications

Discrimination of Shark species by simple PCR of 5S rDNA repeats

Discrimination of Shark species by simple PCR of 5S rDNA repeats

Temporal changes in some Rajiformes species of cartilaginous fish (Chondrichthyes) from the west coast of İskenderun Bay (northeastern Mediterranean)

Identificacion Morfologica De Las Aletas De Los Principales Tiburones Pelagicos Comercializados en Chile: Azulejo (Prionace Glauca Linnaeus), Marrajo (Isurus Oxyrhinchus Rafinesque), Y Tintorera (Lamna Nasus Bonnaterre)

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