Ecologia marinha

Os oceanos cobrem cerca de 72% da superfície da terra. É por isso que já se disse que o nome deste plante deveria ser água e não Terra! Apesar disso, apenas 7 a 8% da proteína consumida pelo homem provêm dos oceanos. É por tudo isso que o grande futuro do oceano como fonte de proteínas, cada vez mais, não está na pesca, mas sim na aquacultura, na criação de peixes, ostras, mariscos, camarões, algas etc.Número padronizado: v. 40, n. 4 (1983)Revista do Serviço Público, ano 40, v.111, n. 4, p. 29-32Meio ambiente. Recursos Naturais. Desenvolvimento SustentávelISSN eletrônico: 2357-8017ISSN impresso: 0034-924

Equinodermes da região entre o Amapá (Brasil) e a Flórida (E.U.A.) II: echinozoa

The echinozoan species collected by the Exploratory Fishing and Gear Research Base of Pascagoula, Mississipi, U.S.A., between the Southwest region of U.S.A. and the Amapa (Brasil) are listed. The geo graphical distribution of twenty two species is extended. A new species, Thyone pawsoni sp. n., is described

Observações sôbre a fauna bêntica do complexo estuarino-lagunar de Cananéia (SP)

The Cananéia region in the south of São Paulo State, is a estuarine-lagunar complex, tn this region we realesed 60 benthic stations with a Foerst "Petersen grab" of 1/10 sq.m. We had studied the density and alcoholic weight of the benthic groups and species. The polychaets was the dominant group in number of species and of individuals. The commonest species was Loandalia americana, Laonice japonica, Clymene sp., Clymenella sp.. The highest density of polychaets was obtained in station 51, 10 meters deepthty, temperature of 18.60ºC, salinity of 25.90%0, water transparency (Secchy disc) of 2 meters, bottom of muddy, sand and pebles. In this station we found 72 individuals/sq. m. and a alcoholic weight of 5.9100 grm. The lamelibrancs was not dominant in neither one station. Tellina alternata and Macoma sp. occurred only in Trapandé bay and Cubatão sea. Littoridina australis var. nana occurs in high density in the north region of Cananéia island. In this region it is the dominant benthic species. Kalliapseudes schubartii occurs only in the Cubatão sea. Renilla reniformis and Virgularia sp. occurs specially in the Trapandé bay. It was possible to recognize five faunistics zones in the soft bottoms of the complex. Zone of Renilla reniformis and Virgularla sp.. The sediment of this zone have a low organic fraction and the zone is on direct influence of the ocean waters. Zone of Macoma sp. and Tellina alternata in the Cananéia sea. Zone of the tanaidaceous Kalliapseudes schubartii and Phoronis sp. principally in the Cubatão sea. In this sea there are the highest organic fraction of the sediment. Zone of Littoridina australis var. nana in the northern region of the Cananéia island. In this zone, we found a low transparency of the water, salinity of 4.91 to 12.36 and a high organic fraction in the sediment. Zone of hard bottoms with hydroids and ophiuroids. The Trapande bay, presents the richest muddy infralittoral benthic fauna of the complex. In this bay is found the highest oxygen content and water highest salinity of the complex. Near of the mouth of the rivers and of the "marigots" and in many places of the complex, we found a floculated softy sediment in the bottom. In these places we d'ont found animals or they are very much rare (stations 11, 14, 17, 20, 48, 54 and 56). In two stations near of the Cananéia bar, in result of strong currents we d'ont found animals (St. 2, 5). Inside of the estuarine-lagunar complex of Cananéia (SP) characterized by the presence of muddy and sand-muddy bottoms with a very much poor epifauna we found in the Casqueiro island a infralittoral stone bottom, with a rich epifauna, specially of the hydroids Eudendrium carneum Clarke, the Ophiothrix angulata Say, amphipods, etc. This occurs because this area is situated in a region of function of the waters of the Trapandé bay and that of the Arárapira river, what permits the existence of a stone bottom not covered by the muddy. This situation permits the occurrence of that epifauna

Ocorrência de Tripalea clavaria (Studer, 1878) na plataforma continental do Rio Grande do Sul

The occurrence and distribution of Tripalea clavaria (Studer, 1878) is discussed, in relation to Brazilian and Falklands currents convergence and water mass in the South-western Atlantic

Sobre o braquiópode Bouchardia rosea (Mawe, 1823)

Benthic samples were taken at 303 stations in the Ilha Grande region, down the isobath of 50 meters. In 12 of these Stations (20 samples) we found the brachiopod Bouchardia rosea (Mawe, 1823). The highest density observed for this species was 58 individuals/m². Its occurrence is related to sediments with less of 30% of granules smaller than 420 µ, without the fraction smaller than 44µ, to salinity higher than 35 and probably to the enrichement process due to nearness of islands and organic material carried from Sepetiba bay. Apparently, there are no relationship, between the lenght of the valve and the position of the station and with the depth. There are, apparently, a direct relationship with salinity and a inverse with temperature. There are a tendency of the median lenght of the valve, to decrease with the increase of the aggrefation of the species. There are, apparently, three generations of the individuals in the presently samples

Equinodermes do Brasil: I. Sôbre algumas espécies novas e outras pouco conhecidas, para o Brasil

Some echinoderms from the South Brazilian region are described. Seven are new to the science: Cucumaria manoelina sp.n., Thyone montoucheti sp.n., Psolus marcusi sp.n., Psolus vitoriae sp.n., Ophioderma divae sp.n., Amphioplus lucyae sp.n. and Chaetaster vanzolinicus sp.n. Some observations are presented on the distribution of Antedondubeni Böhlsche, 1886, Cucumaria pulcherrima (Ayres, 1854), Thyone belli Ludwig, 1887 and of Ophiothrix rathbuni Ludwig, 1882 in Brazilian marine shelf region

Nota sôbre os fundos detríticos do circalitoral inferior da plataforma continental brasileira ao sul do Cabo Frio (RJ)

Some observations on the circalittoral benthic fauna of the region south of Cabo Frio (RJ) are presented. This fauna is similar to that of Mediterranean and Oriental Atlantic region

Equinodermes do Brasil: III. Observações sobre algumas espécies coletadas durante as viagens do N/Oc. "Almirante Saldanha"

As seguintes espécies de equinodermes sao assinaladas pela primeira vez para o Brasil: Holothuria (Cystipus) af. pseudofossor, Stylocidaris lineata, Clypeaster (Clypeaster) rosaceus, Chaetaster longipes, Luidia barbadensis, Amphiura princeps Ophiophragmus pulcher e Amphipholizona delicata. Cladodactyla crocea e Pseudocnus perrieri foram coletadas apenas ao sul do Rio da Prata. Pseudocnus dubiosus e Chiridota marenzelleri ocorreram na região do Uruguai.The geographical distribution of Holothuria (Cystipus) pseudofossor, Stylocidaris lineata, Clypeaster (Clypeaster) rosaceus Chaetaster longipes Luidia barbadensis, Amphiura princeps, Ophiophragmus pulcher and Amphipholizona delicata is extended to the Brazilian region. Cladodactyla croces and Pseudocnus perrieri were collected in the region near Mar del Plata (Argentina) and Pseudoonus dubiosus and Chiridota marenzelleri , in front of Uruguay