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Contribución al estudio biológico de la tintorera (prionace glauca) capturada accidentalmente en la pesquería de palangre de superficie de pez espada en el mediterráneo occidental OceanDocs
de la Serna, J.M.; Valeiras, J..
(Contribution to the biological study of blue shark (Prionace glauca) incidental catch by the Spanish surface longline fisheries for swordfish in the western Mediterranean). Blue shark (Prionace glauca) bycatches in the Spanish surface longline fisheries in the Mediterranean targeting swordfish (Xiphias gladius) from 1999 to 2001 represented 2% of the total catch. Information from onboard observers during 861 fishing sets in 26 longliners indicated that the highest catches were made in area 4-35000 (Alboran Sea) which represents 75.6% of the total observed catch of blue shark. The observed CPUE are from 5.5 to 34.1 kg/1000 hooks. Mean size at capture (LJFL) was 141.6 cm (SD=35.88). The proportion of females from the total was 0.5.
Tipo: Report Palavras-chave: Swordfish fishery; Mediterranean; Blue shark; By-catch; Prionace glauca; Shark fisheries.
Ano: 2003 URL: http://hdl.handle.net/1834/790
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Contribución al estudio biológico de la tintorera (prionace glauca) capturada accidentalmente en la pesquería de palangre de superficie de pez espada en el mediterráneo occidental OceanDocs
de la Serna, J.M.; Valeiras, J..
(Contribution to the biological study of blue shark (Prionace glauca) incidental catch by the Spanish surface longline fisheries for swordfish in the western Mediterranean). Blue shark (Prionace glauca) bycatches in the Spanish surface longline fisheries in the Mediterranean targeting swordfish (Xiphias gladius) from 1999 to 2001 represented 2% of the total catch. Information from onboard observers during 861 fishing sets in 26 longliners indicated that the highest catches were made in area 4-35000 (Alboran Sea) which represents 75.6% of the total observed catch of blue shark. The observed CPUE are from 5.5 to 34.1 kg/1000 hooks. Mean size at capture (LJFL) was 141.6 cm (SD=35.88). The proportion of females from the total was 0.5.
Tipo: Report Palavras-chave: Swordfish fishery; Blue shark; By-catch; Mediterranean; Prionace glauca; Shark fisheries; Sharks.
Ano: 2003 URL: http://hdl.handle.net/1834/790
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Large-scale genetic panmixia in the blue shark ( Prionace glauca ): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? ArchiMer
Bailleul, Diane; Mackenzie, Alicia; Sacchi, Olivier; Poisson, Francois; Bierne, Nicolas; Arnaud-haond, Sophie.
The blue shark Prionace glauca, among the most common and widely studied pelagic sharks, is a top predator, exhibiting the widest distribution range. However, little is known about its population structure and spatial dynamics. With an estimated removal of 10 to 20 million individuals per year by fisheries, the species is classified as “Near Threatened” by International Union for Conservation of Nature. We lack the knowledge to forecast the long-term consequences of such a huge removal on this top predator itself and on its trophic network. The genetic analysis of more than 200 samples collected at broad scale (from Mediterranean Sea, North Atlantic and Pacific Oceans) using mtDNA and nine microsatellite markers allowed to detect signatures of genetic...
Tipo: Text Palavras-chave: Blue shark; Conservation; Fisheries; Genetic panmixia; Prionace glauca; Stock.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00417/52866/53776.pdf
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Using body mass index (BMI) to estimate mercury contamination of the blue shark (Prionace glauca) and the shortfin mako (Isurus oxyrinchus) ArchiMer
Biton Porsmoguer, Sebastian; Dekeyser, Ivan; Banaru, Daniela; Bouchoucha, Marc; Marco-miralles, Francoise.
Blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) specimens were caught in the North-eastern A tlantic O cean by S panish and Portuguese longliners. They are considered as top-predators, particularly susceptible to bioaccumulate mercury (Hg). The H g mean levels in blue shark and shortfin mako were 0.4 (SD = 0.3 mg kg-1) and 0.5 (SD = 0.9 mg kg-1), respectively. The body mass index (BMI) was tested to demonstrate the accumulation of H g in these two top-predators, taking into account size (TL, cm) and mass (W, kg) simultaneously. The comparison of these three methods showed that the BMI could be a relevant biological indicator of the accumulative H g process for sharks.
Tipo: Text Palavras-chave: Carcharinidae; Prionace glauca; Lamnidae; Isurus oxyrinchus; Northeast Atlantic; Mercury; Body Mass Index (BMI).
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00373/48439/48700.pdf
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