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Seabirds breeding at the Berlengas, forty-two years after Lockley’s visit. Ibis.
No full textThe Berlengas were visited by R.M. Lockley, who stayed on the main island from 20 to 24 June 1939. At that time, only four seabird species were found breeding at Berlenga (Lockley 1952), namely Cory's Shearwater Calonectris diomedea , Shag Phalacrocorax aristotelis (c.70 pairs), Herring Gull Larus argentatus (c.1000 pairs) and Guillemot Uria aalgae (c.6000 pairs). Breeding of all four species had been known to earlier ornithologists though population sizes had not been estimated prior to Lockley's visit. Unfortunately, it is not clear which census techniques Lockley used to make his evaluation of the breeding populations (Lockley 1952), and care must be taken when using his result to check any subsequent population changes. The Berlenga islands are located off the western coast of Portugal, near the fishing village of Peniche. During the breeding seasons of 1977, 1978 and 1981, census work was carried out at the Berlengas, following current techniques described elsewhere (Cramp et al. 1974, Lloyd 1975, Nettleship 1976). A futher three species were found to breed, namely Madeiran Petrel Oceanodroma castro, Lesser Black-backed Gull L. fuscusand Kittiwake Rissa tridactyla
The beach seine xavega in Costa de Caparica and Fonte da Telha (portuguese central west coast)
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The beach seine xavega in Costa de Caparica and Fonte da Telha (Portuguese central west coast).
No full textAves Marinhas nidificantes no litoral português. Actas do Colóquio Nacional para a Conservação das Zonas Ribeirinhas.
No full textCaracterização da Pesca de Cerco na Costa Oeste Portuguesa.
Get PDFIn this study we present the results of fishing activity by the purse-seine coastal fleet in the ports of Figueira da Foz, Sesimbra, Setúbal and Sines over a period of three months. Data was collected onboard purse-seine vessels and through a survey made to the skippers. Some regional variations in the typical pattern of fishing activity were found. In Figueira da Foz and Sines, sardine was the target species. In Sesimbra and Setúbal, focused most of their effort at horse-mackerel and demersal fish species. Mean trip duration was shorter in Figueira da Foz, where normally one set per trip was made, and higher in Sesimbra\ud
and Sines, where two sets per trip where frequently made. Setúbal vessels differed considerably from those of the others ports, which implied a different pattern of activity