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Metodologia para a monitorização e gestão da pesca de arrasto em Portugal. O e...
Simões, Joana; Pinto, Carlos; Afonso-Dias, ManuelA METHODOLOGY FOR THE MONITORING AND MANAGEMENT OF TRAWL FISHERIES IN PORTUGAL. THE SIG EXAMPLE OF GEOCRUST 1.0. This paper aims to present the Geographical Information System GEOCRUST 1.0, a computer programme developed within the fishery research project DGXIV 99/059, Use of Satellite GPS data to map effort and landings of the Portuguese crustacean fleet (GEOCRUST), in the University of Algarve. This stand-al...
Atlantic chub mackerel (Scomber colias) spawning season, size and age at first ...
Vasconcelos, Joana; Afonso-Dias, Manuel; Faria, GraçaThe pelagic chub mackerel, Scomber colias Gmelin, 1789 is one of the most important fishery resources in the Madeira Archipelago. S. colias is caught by a small and coastal purse-seine fleet that traditionally operates around the islands. Monthly samples of chub mackerel were taken from commercial landings, between January 2002 and December 2005. Sex and maturity were assigned by visually inspecting the gonads ...
Aspects of the biology of the leaf‐scale gulper shark Centrophorus squamosus (B...
Severino, Ricardo B.; Afonso-Dias, Isabel; Delgado, João; Afonso-Dias, ManuelA total of 206 Centrophorus squamosus (Bonnaterre, 1788) with a total length ranging from 89 to 146 cm were captured at an average depth of 1200 metres. Of the 61 females sampled, 34% were gravid, showing an absolute individual fecundity of two to ten embryos (pups). The results clearly indicated that this deepwater shark spawns in the Portuguese waters off Madeira archipelago.
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