Southern Megrim Species Results from Spanish Discard Sampling Programme

A discard megrims (Megrim, Lepidorhombus whiffiagonis and Four spot megrim, L. boscii) composition estimates for the Spanish bottom otter trawl fleets operating in the Northeast Atlantic ICES Divisions VIIIc and North IXa are presented. Information has been obtained by sampling Spanish fleets under...

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Bibliographic Details
Main Authors: Pérez-Contreras, María Nélida, Santos-Blanco, Juan, Araujo-Fernández, María Hortensia, Salinas-Aguilera, Miren Itxaso
Format: Report
Language:unknown
Published: 2011
Subjects:
Centro Oceanográfico de Vigo
Discards
Pesquerías
Megrims
Northeast Atlantic waters
Bottom Trawl
North Atlantic
Northeast Atlantic
Online Access:http://hdl.handle.net/10508/3651
http://hdl.handle.net/10261/328529
Description
Summary:A discard megrims (Megrim, Lepidorhombus whiffiagonis and Four spot megrim, L. boscii) composition estimates for the Spanish bottom otter trawl fleets operating in the Northeast Atlantic ICES Divisions VIIIc and North IXa are presented. Information has been obtained by sampling Spanish fleets under the “Spanish Discard Sampling Programme” carried out by the IEO. Trip was the sampling unit, being raised to different fleet level using fishing effort as auxiliary variable and total fleet landings. Raising to total fleet landings was used for discard fleet estimation due to the lower CV obtained. Time series on discards of both species since 1993 to 2010 are presented. Discard age distributions of both southern megrims species, are also showed. Discard estimates for these species show high between-years variation, exceeding almost 25% CV in almost all cases in both species but with lower values in four spot megrim. MLS and low market value for small fish are the main factors that force the fleet to discard most of megrims species.

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