Trawl catch composition during different fishing intensity periods in two Mediterranean demersal fishing grounds

Sánchez, Pilar; Sartor, Paolo; Recasens, Laura; Ligas, Alessandro; Martín, Javier; Ranieri, Stefano De; Demestre, Montserrat

doi:10.3989/scimar.2007.71n4765

Cited by 60 publications

(58 citation statements)

References 19 publications

(22 reference statements)

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“…3). Despite the poor Levantine fishery suppositions made in various studies (Por, 1989, Sonin et al, 2007, these values are comparable to catch and discard rates reported for the central Mediterranean (Machias et al, 2001, D'Onghia et al, 2003, Sánchez et al, 2007. Discarded biomass alone, however, cannot represent the full extent of the impact of trawling on future year classes.…”

Section: Discards and Catch Compositionsupporting

confidence: 56%

“…Other such species include congers, ophiodons and other eels, gurnards, some flatfishes, such as B. podas or C. linguatula, scorpion fishes, weavers and stargazers. Some crustaceans with commercial potential are also discarded in Israel, most notably the stomatopod Squilla mantis, which is landed consistently, and seldom discarded in Balearic and Adriatic trawl fisheries (Sánchez et al, 2007, Demestre et al, 2008. The Israeli fishing fleet is thus wasting a potentially valuable resource, as these species can be landed and sold if a suitable market can be found.…”

Section: Discards and Catch Compositionmentioning

confidence: 99%

“…A summer trawling moratorium, as practiced in other Mediterranean countries (Machias et al, 2001, D'Onghia et al, 2003, Sánchez et al, 2004, Demestre et al, 2008 may prove effective in raising CPUE and reducing discards. An effective moratorium requires that fishing pressure is not merely shifted to other seasons and that discard practices remain consistent throughout the fishing season (Machias et al, 2001, Sánchez et al, 2007.…”

Section: Spatial and Temporal Trendsmentioning

confidence: 99%

“…There are also spatial differences between different trawling zones. In order to understand these, it is important to determine the characteristics of and variation in local fishing practices (Sánchez et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives

Edelist¹,

Sonin²,

Golani³

et al. 2011

Sci. Mar.

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SUMMARY:The spatiotemporal patterns of discards and catch composition of Israeli trawlers were examined using a 4-year (1990-1994), 324 haul dataset. Haul depth was found to be the main grouping variable for hauls, although significant seasonal differences were also found. 28.3% of the total catch was discarded, and there was a 40.1% discard percentage in shallow hauls. According to these figures, annual discards for the Israeli trawl fleet for the study period are estimated at ca. 440 to 700 t. Both the biomass and the number of discarded specimens peaked in summer, as well as the percentage of juvenile fish of commercial species. These findings suggest that a summer moratorium on trawling would reduce discards. The percentage of specimens of Indo-Pacific origin decreased from 51% in depths shallower than 37 m to 24% between 38 and 73 m, and 8% in deeper strata. Discards along the Israeli coast were comparable to those observed elsewhere in the Mediterranean. The findings presented here are the first quantitative account of fish community assemblages in the nearshore waters of the easternmost part of the Mediterranean, and thus provide valuable information for comparisons with more current datasets that are currently being assembled.Keywords: bottom-trawl, Israel, discards, catch composition, Lessepsian migration, fishery management. RESUMEN:Patrones espacio-temporales de la captura y los descartes de pesquería de arrastre mediterránea israelí al inicio de la década de los noventa: perspectivas ecológicas y de conservación. -Se analizaron los patrones espacio-temporales de los descartes y la composición de la captura de la flota de arrastre de Israel utilizando datos de 4 años (1990)(1991)(1992)(1993)(1994), 324 caladas. La profundidad resultó ser el principal factor en la agrupación de las caladas, si bien se encontraron asimismo diferencias significativas entre estaciones. Se descartó el 28.3% de la captura total, alcanzándose el 40.1% en las caladas realizadas en las aguas más someras. Según estos porcentajes, se estimó una captura anual descartada por la flota de Israel en ese período de 440-700 t. La biomasa, el número de ejemplares descartados, así como el porcentaje de juveniles de especies comerciales fue mayor en verano. Estos resultados sugieren que una veda de arrastre en verano favorecería la disminución de la captura descartada. El porcentaje de ejemplares de origen indo-pacífico descendió desde 51% en aguas de una profundidad inferior a 37 m, al 24% entre 38-73 m y al 8% en el estrato más profundo. Los descartes en la costa israelí fueron similares a los observados en otras zonas del Mediterráneo. Se presentan por primera vez resultados cuantitativos relativos a comunidades de las aguas costeras del extremo oriental del Mediterráneo, aportándose información para su comparación con datos más recientes que en la actualidad están siendo obtenidos.Palabras clave: arrastre de fondo, Israel, descartes, composición de la captura, migración lessepsiana, gestión de pesquerías.

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Section: Discards and Catch Compositionsupporting

confidence: 56%

Section: Discards and Catch Compositionmentioning

confidence: 99%

Section: Spatial and Temporal Trendsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives

Edelist¹,

Sonin²,

Golani³

et al. 2011

Sci. Mar.

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show abstract

“…Differences in environmental factors, such as productivity, seabed characteristics, depth, and fishing pressure, affect catch composition, landings, and discards (Carbonell et al, 2003, Sanchez et al, 2007. Furthermore, small-scale daily variations in some environmental factors, such as temperature, waves, and wind direction and intensity, could also significantly impact catches (Lefkaditou et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Catch composition and discard of the boat seine in the İstanbul Strait (Turkey)

Uzer¹,

Yıldız²,

Karakulak³

2017

Turk J Zool

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This study attempted to determine certain characteristics of the species caught in the boat seine fishery in the İstanbul Strait during the 2009-2010 fishing season, including catch composition, commercial and nontarget catch ratios, catch per unit effort (CPUE), and the length distributions of commercial species. A survey of 20 boat seine operations detected species belonging to the following 3 different taxonomic groups: 26 Osteichthyes, 2 Crustacea, and 1 Mollusca. Of all of the nontarget species, 13 were commercial, 14 were noncommercial, and only 1 was under threat. Of the total catch, the proportion of the commercial species in the nontarget catch was 31.3%, and that of the discarded catch, which the fishermen did not take into account, was 2.8%. According to the Spearman rank correlation test, there was a significant correlation between the total catch and the discarded catch (r = 0.759); the size of discarded catch increased as the catch increased (P = 0.000). It was clear from the data that overfishing was seen in the commercial species.

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Fishery Discard as a Source of Food for Reared or Wild Fish? The Bottom Trawling in the Mediterranean Sea as a Case Study

Gasco¹,

Gai²,

Maricchiolo³

et al. 2018

SpringerBriefs in Molecular Science

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Trawl catch composition during different fishing intensity periods in two Mediterranean demersal fishing grounds

Cited by 60 publications

References 19 publications

Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives

Spatiotemporal patterns of catch and discards of the Israeli Mediterranean trawl fishery in the early 1990s: ecological and conservation perspectives

Catch composition and discard of the boat seine in the İstanbul Strait (Turkey)

Fishery Discard as a Source of Food for Reared or Wild Fish? The Bottom Trawling in the Mediterranean Sea as a Case Study

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