Pescas efectuadas durante la campaña "ATLOR V" (C. Bojador-C. Blanco, abril-mayo 1974) : Características y tratamiento de las capturas

Abstract

[EN] During the cruise ATLOR V (Apri-May 1975, in the west coast of Spanish Sahara) 21 fishing hauls were carried out. Ninenteen of them were bottom trawls (using two commercial standard nets, with 40 and 48 mm size at code-end, mesured by ICNAF method, added with a cover of 10 mm mesh size), and two were IKMT sets. In the present report the methodology employed is described. Catches were subsampled under prestabilished conditions: a) species composition (number, weigts and relatives abundances for all species); b) length frecuencies distribution; and c) biological data from selected species (length, weight, sex maturity, age, stomachal contents, etc). Data from c) is not reported by the moment. Special deck annotaton sheets were used when picking up data. These sheets-at the end of the study of each haul-were directly punched in cards and entered to the DBP system. Header cards of DBP system included non biological data, as data, timing, situation, depth, weather, etc. A general table of species presences for the bottom trwals is reported. A total of 159 different species were identified. [...] Scyliorhinus canicula, Squalus fernandinus, Sardina pilchardus, Engraulis encrasicholus, Zeus faber, Paracentropristis cabrilla, Dentex filosus, Dentex macrophthalmus, Pagellus erythrinus, Pagellus acarne, Pagellus coupei, Diplodus vulgaris, Diplodus annularis, Spondyliosoma cantharus, Boops boops, Pomadasis incisus, Parapristipoma mediterraneum, Mullus surmulletus, Helicolenus dactylopterus, Scorpaena scroIa, Trigloporus lastovitza, Aspitrigla lucerna, Aspitrigla cuculus, Trachurus trachurus, Decapterus rhonchus, Urnoscopus scaber, Batrachoides didactylus, Merluccius merluccius, Citharus linguatula, Solea solea, Sepia officinalis, Sepia berthelotti, Loligo vulgaris, Loligo forbesi, Octopus vulgaris [...]

[ES] Durante la campaña ATLOR V se realizaron 21 pescas de arrastre, de las que 19 fueron de fondo (18 realizadas con éxito) y las dos restantes pelágicas efectuadas mediante un aparejo del tipo ISAACS KIDD que se tratan en otro trabajo. Para las pescas de fondo se utilizaron dos aparejos, baca y bou, de características muy similares. La amplitud de las mallas de los copos medidas en diagonal y a 4 kg de fuerza fueron de 40 y 48 mm respectivamente. En ocasiones se incorporaron sobrecopos de 10 mm de malla, unidos a la altura del final de la manga de ambos aparejos, con objeto de realizar estudios de selectividad y para muestrear la fracción de juveniles y de peces pequeños de Ias poblaciones. [...]