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Effect of Codend Circumference on the Size Selection of Square-Mesh Codends in Trawl Fisheries
- Source :
- PLoS ONE, PLoS ONE, Vol 11, Iss 7, p e0160354 (2016), PloS one 11 (2016): e0160354. doi:10.1371/journal.pone.0160354, info:cnr-pdr/source/autori:Sala A.; Herrmann B.; De Carlo F.; Lucchetti A.; Brcic J./titolo:Effect of Codend Circumference on the Size Selection of Square-Mesh Codends in Trawl Fisheries/doi:10.1371%2Fjournal.pone.0160354/rivista:PloS one/anno:2016/pagina_da:e0160354/pagina_a:/intervallo_pagine:e0160354/volume:11
- Publication Year :
- 2016
-
Abstract
- Link to publishers version: 10.1371/journal.pone.0160354 It is well established that increasing mesh number in the circumference of a diamond-mesh trawl codend can reduce size selection for round fish, whereas selection for flat fish species is unaffected. This effect has also been documented in Mediterranean trawl fisheries. In contrast, no information is available with regard to the effect of increasing mesh number in the circumference of square-mesh codends on the size selection of round fish and flat fish species. A field study was devised to bridge this gap and formulate proposals aimed at improving trawl fishery management. Size selection data were collected for a round fish species, red mullet (Mullus barbatus), and two flat fish species, Mediterranean scaldfish (Arnoglossus laterna) and solenette (Buglossidium luteum). Fishing trials were conducted in the Adriatic Sea (Central Mediterranean) using three square-mesh codends that differed only in mesh number around the circumference. Results demonstrated that increasing the number of meshes from 107 to 213 reduced the 50% retention length (L50) for red mullet by 2.5 cm but did not affect size selection for the two flat fish species. In some fisheries, regulatory provisions regarding the number of meshes in the circumference should therefore be carefully considered both for diamond- and square-mesh codends.
- Subjects :
- 0106 biological sciences
Mullus barbatus
Red mullet
Physiology
lcsh:Medicine
01 natural sciences
Mathematical and Statistical Techniques
Medicine and Health Sciences
Ethnicities
Biomechanics
HAKE MERLUCCIUS-MERLUCCIUS
MULLET MULLUS-BARBATUS
DIAMOND-MESH
MEDITERRANEAN TRAWL
END SELECTIVITY
TWINE THICKNESS
GADUS-MORHUA
CATCH SIZE
HADDOCK
SEA
lcsh:Science
Multidisciplinary
Physics
Fishes
Classical Mechanics
Agriculture
04 agricultural and veterinary sciences
Circumference
Italian People
Curve Fitting
Drag
Physical Sciences
Vertebrates
Fish
Fisheries management
Statistics (Mathematics)
Research Article
Fishing
Fisheries
Fluid Mechanics
Biology
Research and Analysis Methods
Continuum Mechanics
Species Specificity
VDP::Agriculture and fishery disciplines: 900
Confidence Intervals
Animals
14. Life underwater
Statistical Methods
Selection (genetic algorithm)
Swimming
Square mesh
Biological Locomotion
010604 marine biology & hydrobiology
lcsh:R
Organisms
Biology and Life Sciences
Trawl selectivity
codend circumference
Fluid Dynamics
biology.organism_classification
Fishery
People and Places
040102 fisheries
0401 agriculture, forestry, and fisheries
lcsh:Q
Population Groupings
Mathematical Functions
Mathematics
Forecasting
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 11
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- PloS one
- Accession number :
- edsair.doi.dedup.....92565956aaf42d9b246e2c2717e03359