Exploitation patterns of the European hake Merluccius merluccius, red mullet Mullus barbatus and striped red mullet Mullus surmuletus in the western Mediterranean

Martín, Paloma; Sartor, Paolo; García–Rodríguez, M.

doi:10.1046/j.1439-0426.1999.00125.x

Cited by 34 publications

(43 citation statements)

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Section: Introductionmentioning

confidence: 99%

“…merluccius is exploited by trawl, long-line and gill net fleets (Aldebert et al, 1993;Martín et al 1999), even though in many areas most of the landings come from bottom trawl. This type of gear exploits mainly small specimens (Martín et al, 1999), as the large individuals are not as vulnerable. However, the use of a wide opening trawl in many areas allows more specimens with a total length (TL) of up to 25-30 cm to be caught (Martín et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…This type of gear exploits mainly small specimens (Martín et al, 1999), as the large individuals are not as vulnerable. However, the use of a wide opening trawl in many areas allows more specimens with a total length (TL) of up to 25-30 cm to be caught (Martín et al, 1999). The presence in the trawl landings of bigger specimens is rather infrequent or restricted to certain periods of the year (Sartor et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Information available for the north-western Mediterranean coast shows that this activity is carried out during specific periods of the year with different gears, depending on the geographic location. More accurate information for this type of fishery is available for the north-eastern Spanish coasts (Catalonia), where hake exploitation is carried out mostly between May and September by long-liners and gillnetters (Martín et al, 1999;Sartor et al, 2001), for the Gulf of Lyons where the activity is carried out by French gillnetters and Spanish longliners (Aldebert et al, 1993) and for the Tyrrhenian Sea (the Western coast of Italy) where the artisanal vessels exploit this species exclusively with gillnets, mostly in the winter-spring season (Sartor et al, 1996Colloca et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence of the high selectivity of gillnets, the size distributions of the catches obtained with these gears show a narrower range, mainly constituted by specimens larger than 22-25 cm total length (TL), with respect to the size distributions of the bottom trawl (Martín et al, 1999;Sartor et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the catches of European hake (Merluccius merluccius, L. 1758) taken with experimental gillnets of different mesh sizes in the northern Tyrrhenian Sea (western Mediterranean)

Sbrana¹,

Belcari²,

Ranieri³

et al. 2007

Sci. Mar.

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SUMMARY: The impact of the gillnet fishery on Merluccius merluccius (European hake) was investigated in the northern Tyrrhenian Sea, western Mediterranean. Four mesh sizes were tested: 53, 62.5, 70 and 82 mm. Horse mackerel (Trachurus trachurus), hake and tub gurnard (Chelidonichthys lucerna) dominated the catches, from a minimum of 89% (82 mm mesh) to a maximum of 97.8% (70 mm) of the biomass caught. Efficiency of the four meshes was not significantly different with respect to the total hake catches. Selectivity on M. merluccius was assessed by Sechin and SELECT methods. Tangling was an important catch modality for hake, as evidenced by the results of the Sechin model which described only the first mode of the size distributions corresponding to the entangled specimens. SELECT showed that the bi-modal function gave the best adjustment to the length-frequency distributions; the modal catch sizes were 33, 39.2, 43.6 and 51 cm total length respectively for the 53, 62.5, 70 and 82 mm mesh sizes. Taking into account the size of first maturity for females (35.1 cm TL), 62.5 mm is the most adequate mesh for exploiting hake as it gives some protection to both immature specimens and large females.Keywords: European hake, gillnet, selectivity, Sechin method, SELECT method, western Mediterranean, artisanal fishery. RESUMEN: COMPARACIÓN DE LAS CAPTURAS DE MERLUZA (MERLUCCIUS MERLUCCIUS, L. 1758) OBTENIDAS CON REDES EXPE-RIMENTALES DE ENMALLE DE DIFERENTES TIPOS DE MALLA, EN EL NORTE DEL MAR TIRRENO (MEDITERRÁNEO NOROCCIDENTAL).-Se estudió el impacto de la pesquería con redes de enmalle sobre la merluza, Merluccius merluccius, (merluza europea) en el norte del mar Tirreno, Mediterráneo noroccidental. Se utilizaron cuatro tamaños de malla: 53, 62.5, 70 y 82 mm. Los peces Trachurus trachurus, M. merluccius y Chelidonichthys lucerna dominaron la biomasa capturada, con un mínimo del 89% (malla de 82 mm) y un máximo del 97.8% (malla de 70 mm). La eficiencia de las cuatro mallas no resultó estadísticamente diferente. La selectividad sobre M. merluccius fue estudiada con los métodos Sechin y SELECT. El enredamiento resultó una importante manera de captura, como evidenció el método Sechin, con un buen ajuste sólo para la primera moda de las distribuciones de talla, correspondiente a ejemplares capturados por enmalle. Con el modelo SELECT la función bimodal fue la mejor para describir las estructuras de talla; las tallas modales de captura fueron 33, 39.2, 43.6 y 51 cm de longitud total, para las mallas de 53, 62.5, 70 y 82 mm respectivamente. Teniendo en cuenta la talla de primera madurez, la malla de 62.5 mm es probablemente la más adecuada para la explotación de la merluza, permitiendo una cierta protección tanto de los inmaduros como de las hembras grandes.Palabras clave: merluza, redes de enmalle, selectividad, método Sechin, método SELECT, Mediterráneo noroccidental, pesca artesanal.

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Section: Introductionmentioning

confidence: 99%