Application of the Gómez-Muñoz model to estimate catch and effort in squid fisheries in Scotland

Young, I.A.G.; Pierce, Graham J.; Murphy, Jeffrey J.; Daly, H. I.; Bailey, N.

doi:10.1016/j.fishres.2005.12.006

Cited by 20 publications

(22 citation statements)

References 9 publications

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“…Our research takes this one step further by extending the dimension of illegality to the artisanal fishery sector and reveals that IUU fishing activity represents the core of the Calabrian fisheries. In other European countries, such as Spain (Atlantic region) or Scotland, the amount of illegal fishing is much lower than what we found in Calabria (Otero et al, 2005;Young et al, 2006).…”

Section: Fishing Fleet Typologies and Featurescontrasting

confidence: 76%

Fishing activity and impacts along the main nesting area of loggerhead sea turtle Caretta caretta in Italy: overwhelming discrepancy with the official data

Cambiè¹,

Camiñas²,

Franquesa³

et al. 2010

Sci. Mar.

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SUMMARY:The southern coast of Ionian Calabria was recently recognized as the main nesting area of the loggerhead sea turtle Caretta caretta in Italy. The aim of this study was to characterize the fishing fleet in this area in terms of number of boats, economic situation, social aspects and impact on sea turtle specimens and target species. A multidisciplinary approach was essential to understand how the conservation problems of C. caretta are linked to various characteristics of the fishing fleet. Our data showed a vast discrepancy between the official census and the actual number of boats fishing in the area: 87% of the observed artisanal vessels lacked a required registration number, and thus were fishing illegally. This has caused serious social problems that worsened over the summer of 2007, when the presence of non-local registered vessels, using drift nets, generated a spatial conflict with the local artisanal fishermen. We identified 11 fishing gears used in the area and four of them were studied with on board observations: illegal drift nets, trammel nets, bottom longlines and longlines targeting swordfish. The total number of turtles caught during the summer in the area by longliners targeting swordfish was calculated to be 500 (±180 SE). In addition the presence of drift netters had a negative impact from an ecological and social point of view.Keywords: Caretta caretta, fishing impact, by-catch, surface longline, drift nets, illegal fishing, artisanal fishing, IUU. RESUMEN:Actividad pesquera e impacto en la principal área de nidificación de la tortuga boba Caretta Caretta en Italia: diferencia abrumadora con los datos oficiales. -La costa sureste de la Calabria jónica ha sido identificada recientemente como el área principal de nidificación de la tortuga boba Caretta caretta en Italia. El objetivo del presente estudio fue caracterizar la flota pesquera en esta área cuantificando el número de barcos por tipología de pesca y describiendo la situación económica, los aspectos sociales y los impactos sobre individuos de tortugas marinas y de las especies objetivo. El enfoque multidisciplinario ha sido fundamental a la hora de entender como los problemas de conservación de C. caretta se relacionan con las varias características de la flota pesquera. Nuestros datos revelan una enorme discrepancia entre el censo oficial y el número real de barcos que faenan en esta área: el 87% de los barcos artesanales pesca ilegalmente, ya que no poseen la matrícula reglamentaria. Esto causa graves problemas sociales que empeoraron durante el verano 2007, cuando la presencia en el área de barcos matriculados, procedentes de otros lugares y que utilizaban las redes de deriva, provocó un serio conflicto espacial con los pescadores artesanales locales. Identificamos 11 artes de pesca empleadas en el área, cuatro de ellas estudiadas con observaciones a bordo: red de deriva ilegal, trasmallo, palangre de fondo y palangre para la captura del pez espada. El total de tortugas capturadas en verano en el área por los palangreros de pe...

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Section: Fishing Fleet Typologies and Featurescontrasting

confidence: 76%

Fishing activity and impacts along the main nesting area of loggerhead sea turtle Caretta caretta in Italy: overwhelming discrepancy with the official data

Cambiè¹,

Camiñas²,

Franquesa³

et al. 2010

Sci. Mar.

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show abstract

“…The Ría of Vigo zone was eliminated from this figure due to the high data variability. (Simón et al, 1996;Neis et al, 1999;Perry et al, 1999;Young et al, 2006). Due to the great complexity of Galician fisheries, a major problem was estimating the real number of vessels harvesting cuttlefish in a given area or landing in a specific port.…”

Section: Discussionmentioning

confidence: 99%

“…In this context, alternative methodologies and models have been used variously to estimate catch and catch per unit effort (CPUE) in smallscale fisheries (Gómez-Muñoz, 1990;Hoening et al, 1997;Kirchner and Beyer, 1999;Neis et al, 1999;Arnaiz et al, 2002;Otero et al, 2005;Young et al, 2006). Among these, Gómez-Muñoz (1990) developed a simple model to estimate catch and catch per unit effort (CPUE) in multispecies small-scale fisheries.…”

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confidence: 99%

Modelling small-scale coastal fisheries of Galicia (NW Spain) based on data obtained from fisheries: the case of Sepia officinalis

et al. 2006

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“…If such movement exists, the centre of abundance would expected to shift from the west coast of Scotland in late summer and autumn towards the North Sea in winter, where spawning may take place (Waluda and Pierce 1998;Pierce et al 2001;Young et al 2006a). The lack of this pattern in the data from most years analysed during the present study is evidence against such movement.…”

Section: West Coast To North Sea Migrationsmentioning

confidence: 99%

“…In the veined squid Loligo forbesi (Teuthoidea, Cephalopoda), such knowledge is important because squid fishing in UK waters is largely unrestricted Young et al 2006a). L. forbesi is usually the only squid species caught in Scottish waters ), mostly as a by-catch from trawl and seine net fisheries targeting Nephrops norvegicus and demersal whitefish (Pierce et al 1994;Pierce and Boyle 2003;Young et al 2006a).…”

Section: Introductionmentioning

confidence: 99%

Seasonal movements of veined squidLoligo forbesiin Scottish (UK) waters

Viana

Pierce

Illian

et al. 2009

Aquat. Living Resour.

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-In order to protect and sustainably manage fishery resource species, it is essential to understand their movements and habitat use. To detect the hypothesised migration of maturing veined squid Loligo forbesi from the west coast of Scotland (UK) to the North Sea and identify possible inshore-offshore movements, we analysed seasonal, spatial and environmental patterns in abundance and size distribution, based on commercial fishery landings data and trawl survey data from Scottish coastal waters (International Council for the Exploration of the Sea, ICES areas IVa, IVb and VIa). A geographic information system (GIS) was used to build monthly contour maps of abundance. Generalised additive mixed models (GAMM) were used to quantify patterns in size distribution and abundance. In most years, there was no evidence of movement from the West to the East coast of Scotland. Evidence of inshore-offshore movements during the life-cycle of the cohort that recruits in autumn (winter breeders) was found instead. The winter breeding cohort appears to spawn in inshore waters and some evidence suggests that the spawning grounds of the summer breeders are also inshore. Across seasons, higher abundance of L. forbesi can generally be found in the north of Scotland at intermediate water depths and in warmer waters.

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Application of the Gómez-Muñoz model to estimate catch and effort in squid fisheries in Scotland

Cited by 20 publications

References 9 publications

Fishing activity and impacts along the main nesting area of loggerhead sea turtle <i>Caretta caretta</i> in Italy: overwhelming discrepancy with the official data

Fishing activity and impacts along the main nesting area of loggerhead sea turtle <i>Caretta caretta</i> in Italy: overwhelming discrepancy with the official data

Modelling small-scale coastal fisheries of Galicia (NW Spain) based on data obtained from fisheries: the case of <i>Sepia officinalis</i>

Seasonal movements of veined squidLoligo forbesiin Scottish (UK) waters

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