Effect of codend mesh size on the performance of the deep-water bottom trawl used in the red shrimp fishery in the Strait of Sicily (Mediterranean Sea)

Ragonese, Sergio; Zagra, Michela; Stefano, L. Di; Bianchini, M.L.

doi:10.1007/978-94-017-0645-2_31

Cited by 27 publications

(30 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The discarded catch from the deep-water shrimp fishery in the Ionian Sea constitutes an important fraction of the total catch (2050%), as shown in other Mediterranean areas (Carbonell et al, 1998;Moranta et al, 2000;Machias et al, 2001;Ragonese et al, 2001). It is almost exclusively due to unwanted fish species while discards of the target species A. antennatus and A. foliacea and other commercial species were negligible.…”

Section: Discussionmentioning

confidence: 99%

“…According to Ragonese et al (2001), no substantial differences were seen in the quantitative and qualitative overall performance of the codends used. Differences were only detected in the biomass of the escaped fraction of the catch (both marketable 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 and discards) and in the size selectivity.…”

Section: Discussionmentioning

confidence: 99%

“…It avoids almost completely the catch of H. dactylopterus and P. blennoides juveniles otherwise discarded using the presently used codend (40 mm sMS) and allows a large 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 Pre-anal length (mm) 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 fraction of small specimens of by-catch and unwanted species to escape. Ragonese et al (1994Ragonese et al ( , 2001 reported that the adoption of a larger mesh size (28 mm side) reduces the capture of low value or undersize specimens, minimizing the sorting time and improving the catch quality. However, considering that nothing is known about the survival of escaped specimens during deep shrimp trawling, it is not yet possible to quantify the reduction of juvenile mortality or of the impact on the deep-sea living resources.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the great importance of discarding within the multispecies Mediterranean bottom trawling fisheries, there is only limited information concerning the amount, composition and factors affecting the discards (Stergiou et al, 1997 andCarbonell et al, 1998;Moranta et al, 2000;Machias et al, 2001;Ragonese et al, 2001). These studies generally suggest that "discards" from trawl fisheries are generally due to unwanted species (without commercial value), by-catch species (of low commercial value) and undersized specimens of species with higher commercial value.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Discards from Deep-water Bottom Trawling in the Eastern-Central Mediterranean Sea and Effects of Mesh Size Changes

D’Onghia¹,

Carlucci²,

Maiorano³

et al. 2003

J. Northw. Atl. Fish. Sci.

View full text Add to dashboard Cite

Data on discards were collected during deep-water bottom seasonal trawling surveys targetting red shrimps (Aristeus antennatus and Aristaeomorpha foliacea) in the Ionian Sea (Eastern-Central Mediterranean). The performance of 3 codends, with stretched mesh sizes of 40, 50 and 60 mm, was tested. A cover with a stretched mesh of 20 mm was employed on each codend.The discarded catch constituted an important fraction of the total catch (2050%). This was almost exclusively due to unwanted fish species, while discards of the target species and other commercial species were negligible. Discard rates increased with total catch and depth.No substantial differences were seen in the overall performance of the codends used. Differences were only detected in the biomass of the escaped fraction of the catch (both marketable and discards) and in the size selectivity. The 40 mm mesh size was not selective in Aristeus antennatus. Larger mesh size codend (50 and 60 mm) allowed a higher number of small specimens to escape. The 50% retention sizes increased according to the mesh size in all examined species.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Discards from Deep-water Bottom Trawling in the Eastern-Central Mediterranean Sea and Effects of Mesh Size Changes

D’Onghia¹,

Carlucci²,

Maiorano³

et al. 2003

J. Northw. Atl. Fish. Sci.

View full text Add to dashboard Cite

show abstract

“…These fisheries have also been regarded as monospecific since no other economically important species is caught incidentally (Ragonese et al, 2001). In NW Australia, on the other hand, A. foliacea is caught along with the astacid Metanephrops sp.…”

Section: Discussionmentioning

confidence: 99%

Deep-sea shrimps (Decapoda: Aristeidae): new targets of the deep-water trawling fishery in Brazil

2006

View full text Add to dashboard Cite

A B S T R A C TFollowing the recent expansion of the Brazilian fishery to slope fishing grounds, a new directed trawl fishery for aristeid shrimps emerged since mid 2002. Aristaeopsis edwardsiana has been the main component of the catches attaining 88.4% of total shrimp production. Aristaeomorpha foliacea and Aristeus antillensis have composed significantly smaller fractions of the landings (9.8 % and 1.8 % respectively). Two main grounds were located in the southeastern region (ca. R E S U M OSeguindo a recente expansão da pesca brasileira para o talude continental, uma nova pescaria de camarões da família Aristeidae tem se desenvolvido desde meados de 2002. O camarão "carabineiro", Aristaeopsis edwardsiana, é o principal componente das capturas, alcançando 88,4 % da produção total de camarões. Os camarões "moruno", Aristaeomorpha foliacea e "alistado", Aristeus antillensis, compõem frações menores das descargas (9,8 % e 1,8 % respectivamente). Duas áreas principais de pesca foram descobertas na região Sudeste do Brasil (19º -25ºS) e uma no limite setentrional da ZEE do país (4º -5ºN). As capturas estiveram concentradas entre as isóbatas de 700 e 750 m. As taxas médias de captura de A. edwardsiana flutuaram entre 6,5 e 9,7 kg.h -1 . As outras espécies foram capturadas em taxas consideravelmente menores (0,1 -0,6 kg.h -1 e 0,1 -1,3 kg.h -1 , respectivamente). Sugere-se uma sazonalidade nas capturas de A. edwardsiana, com valores máximos entre julho e dezembro. Apesar do direcionamento aos camarões, capturas incidentais do caranguejo-real (Chaceon ramosae) alcançaram uma média de 22 % das descargas totais.

show abstract

Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach

Ridley

Harrison

Phillips

et al. 2010

Aquatic Conservation

View full text Add to dashboard Cite

ABSTRACT1. The global decline of albatrosses (Diomedidae: Procellariiformes) is thought to have occurred largely as a direct result of fishery-related mortality. Albatrosses and other large petrels interact with fisheries in several ways, including scavenging used bait and discarded offal, which may contain hooks.2. Hooks that are ingested by breeding birds are often fed to chicks which subsequently regurgitate them shortly before fledging.3. In this study a series of mathematical (cladistic, cluster and principal components) analyses are applied to a sample of 241 items of fishing gear (hook, snood and hook/snood unit) collected from seabird nest sites on Bird Island, South Georgia, and 44 reference gear items provided by four South Atlantic regional fisheries.4. The five separate analyses failed to assign most gear to a particular fishery or to identify any consistent annual trends. The homogeneous nature of the material, which was largely derived from the same manufacturers, meant that gear origin could not be determined. This suggests that hooks found at seabird colonies in this, and potentially other regions, will be of limited use in identifying offending fisheries, unless operators are obliged to deploy gear with unique marks in the future.5. Nevertheless, it is suggested that this approach should work effectively where birds interact with a range of fisheries targeting different species using variable gear. This study therefore represents an innovative approach to the characterization of lost fishing gear with potentially widespread application.

show abstract

Effect of codend mesh size on the performance of the deep-water bottom trawl used in the red shrimp fishery in the Strait of Sicily (Mediterranean Sea)

Cited by 27 publications

References 3 publications

Discards from Deep-water Bottom Trawling in the Eastern-Central Mediterranean Sea and Effects of Mesh Size Changes

Discards from Deep-water Bottom Trawling in the Eastern-Central Mediterranean Sea and Effects of Mesh Size Changes

Deep-sea shrimps (Decapoda: Aristeidae): new targets of the deep-water trawling fishery in Brazil

Identifying the origins of fishing gear ingested by seabirds: a novel multivariate approach

Contact Info

Product

Resources

About