16 research outputs found
Ecological distribution and population structure of Acantholobulus schmitti (Rathbun, 1930) (Crustacea, Decapoda, Xanthoidea) on the southeastern Brazilian coast
Population biology of Macrobrachium jelskii (Miers, 1877) (Decapoda, Palaemonidae) from an artificial pond in Bahia, Brazil
Treat cutaneous warts on a case-by-case basis, taking into account patient factors and the available clinical evidence
Population biology of spine shrimp Exhippolysmata oplophoroides (Holthuis) (Caridea, Hippolytidae) in a subtropical region, SĂŁo Paulo, Brazil Biologia populacional do camarĂŁo espinho Exhippolysmata oplophoroides (Holthuis) (Caridea, Hippolytidae) numa regiĂŁo subtropical, SĂŁo Paulo, Brasil
The population biology of Exhippolysmata oplophoroides (Holthuis, 1948) was studied in Ubatuba Bay (23Âș26'S, 45Âș02'W), Ubatuba, SĂŁo Paulo, Brazil, from September/1995 to August/1996. Each sampling comprised eight transects (14 000 mÂČ each), sampled monthly with three repetitions. The specimens were classified with respect to the presence or absence of eggs in the abdominal appendages. Spine-shrimps occurred only on six transects, being most abundant on transect II, with the highest incidence in late spring and throughout the summer months. Ovigerous and non-ovigerous shrimps were present year-round, in an approximately similar proportion (1:1). Site II in Ubatuba Bay is characterized by high salinity and oxygen values, temperature between 26 and 29ÂșC, low organic matter content in the sediment, and a bottom composed of very fine sand; these environment and biological features allow the establishment and maintenance of the population of E. oplophoroides.<br>A biologia populacional de Exhippolysmata oplophoroides (Holthuis, 1948) foi estudada na enseada de Ubatuba (23Âș26'S, 45Âș02'W), Ubatuba, SĂŁo Paulo, Brasil, de setembro de 1995 atĂ© agosto de 1996. Cada amostragem compreendeu oito transectos (14000 mÂČ cada), amostrados mensalmente com trĂȘs repetiçÔes. Os espĂ©cimes foram classificados quanto Ă presença ou ausĂȘncia de ovos nos apĂȘndices abdominais. Os camarĂ”es espinhos ocorreram somente em seis transectos, sendo mais abundantes no transecto II, com a maior incidĂȘncia no final da primavera e ao longo dos meses de verĂŁo. IndivĂduos ovĂgeros e nĂŁo ovĂgeros estiveram presentes o ano todo, numa proporção semelhante a 1:1. O transecto II Ă© caracterizado por altos valores de salinidade e oxigĂȘnio, temperatura entre 26 e 29Âș C, baixo teor de matĂ©ria orgĂąnica e sedimento composto por areia muito fina. Tais caracterĂsticas biolĂłgicas e ambientais permitem o estabelecimento e a manutenção da população de E. oplophoroides na regiĂŁo de estudo