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	Provedor de dados Iheringia, Sér. Zool. (2) Autor Gil,Guacira M. (2) Thomé,José W. (2) Gomes,Suzete R. (1) Silva,Rosane S. da (1) Palavra-chave Anatomy (1) Biological cycle (1) Conquiliometry (1) Donax (1) Reproductive cycle (1) Semelparity (1) Simpulopsis (1) Spawning season (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2004 (2) País Brazil (2) Idioma Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Ciclo biológico de Simpulopsis ovata (Gastropoda, Bulimulidae) em São Francisco de Paula, Rio Grande do Sul, Brasil Iheringia, Sér. Zool. Gomes,Suzete R.; Silva,Rosane S. da; Gil,Guacira M.; Thomé,José W.. The population growth of Simpulopsis ovata (Sowerby, 1822) from the Centro de Pesquisas e Conservação da Natureza - Pró-Mata, São Francisco de Paula, Rio Grande do Sul, Brazil, was studied along eleven months of 1996. Two discontinuous age classes were identified. The first one, with a monthly growth rate of 1.55 mm, was reproductively mature during April and May. The second one appeared after the previous group and had a monthly growth rate of 0.44 mm. The fact that no adults from the two age classes were found together is a characteristic of a semelparous species. New insights about its shell, pallial cavity and reproductive system are given. This is the first record of S. ovata for the State of Rio Grande do Sul. Tipo: Info:eu-repo/semantics/article Palavras-chave: Simpulopsis; Semelparity; Anatomy; Conquiliometry; Biological cycle. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000300005 Descrição do ciclo reprodutivo de Donax hanleyanus (Bivalvia, Donacidae) no sul do Brasil Iheringia, Sér. Zool. Gil,Guacira M.; Thomé,José W.. The changes in gonadal development in male and female of Donax hanleyanus Philippi, 1847 are described. Gonad development and spawning seasons were assessed by monthly sampling of population from Arroio Teixeira beach, southern Brazil. Histological examination of clams showed in the most of the adult population sampled that the spawning is practically continuous, without any period of sexual rest. There are two main periods of gametogenesis, in winter and in summer, being the degree of maturation longer in the latter. The water temperature is stimulant on gametes proliferation and spawning. Tipo: Info:eu-repo/semantics/article Palavras-chave: Donax; Reproductive cycle; Spawning season. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000300008 Registros recuperados: 2 Primeira ... 1 ... Última

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