Trawl Anglerfish Discard Estimates and Patterns in the Spanish Northeast Atlantic Fisheries.
MetadataShow full item record
AuthorsSantos-Blanco, J. (Juan); Díaz-Conde, M.P. (María Paz); Quinzán, M. (Marta); Sampedro-Pastor, P. (Paz); Ruiz, J. (Jon); Pérez-Contreras, M.N. (María Nélida)
Northeast Atlantic waters
Bottom Otter trawl
Discards estimates from Spanish bottom otter trawl of anglerfish, Lophius budegassa (black anglerfish) and L. piscatorius (white anglerfish), in Northeast Atlantic Ocean (ICES Sub-areas VI, VII and Divisions VIIIabd) are presented in this paper. Information was obtained by observers on board in different discard programs carried out by Spanish Research Institutes. Total discards obtained by the different raising procedures were very similar and total discard raised by effort (number of trips) as a simple estimator was assumed as the adequate value. Values in weight range from 4 t to 590 t, and from 4 t to 320 t for white and black anglerfish respectively in Sub-areas VI and VII. Length distributions of discarded anglerfish (Sub-areas VI and VII) show that most of the specimens are juvenile individuals. Discards estimations show a high variability in weight and number along the period studied. Yearly abundance of juveniles in the area is a factor to understand the variability ...