Preliminary results of the sampling of the purse-seiners landings at the fishing-harbour of Abidjan. Supplement 1: Sardinella eba and Sardinella aurita during 1971.- Supplement 2: The mackerel - Scomber japonicus

caballa dimension dimensions exploratory fishing fishery resources mackerel maquereau methode methods muestreo peso poids recursos pesqueros ressource halieutique sampling sardina sardine sardinela sardinellas sardinelle sardines scomber statistical methods weight