Data/hora: 11/06/2024 14:49:48

Provedor de dados: 	104	
País: 	Brazil	
Título: 	Estudo do crescimento e da reprodução de Bradybaena similaris (Férussac) (Mollusca, Xanthonychidae) em laboratório	
Autores: 	Almeida,Marcelo Nocelle de; Bessa,Elisabeth Cristina de Almeida.	
Data: 	2001-12-01	
Ano: 	2001	
Palavras-chave: 	Bradybaena similaris; Biology; Growth; Reproduction.	
Resumo: 	Biological aspects of Bradybaena similaris (Férussac, 1821) were studied, such as: onset of sexual maturity, occurrence of self-fertilization, oviposition, incubation period, eclosion rate and shell length measurement at different stages of development. It was noted that in isolated B. similaris the minimum and maximum time for reaching sexual maturity were 109 and 180 days, respectively. When kept in groups, the minimum time was 78 days. The occurrence of self-fertilization was observed in 18.4% of specimens. The total number of eggs per oviposition varied from one to 38 (average: 3,5 ± 7,15), the total number of eggs per mollusc varied from one to 39 (average: 7,0 ± 10,21) and the total number of oviposition per mollusc varied form one to six (averege: 2,0 ± 1,27). Thirty ovipositions (894 eggs) were followed and the minimum eclosion time of the young was 14 days, the maximum eclosion time was 35 days and the average 23,69 days. The eclosion average percent was 81,22. As to the shell length in different growth stages, it was observed that in B. similaris the length of the shell was similar until 30 days for age. After this period isolated specimens acquired a greater growth rhythm when compared to that of grouped specimens. The maximum shell length of isolated specimens was 17,4 mm whereas grouped specimens reached 14,5 mm. In this specie, individuals that were kept grouped became sexually mature earlier than isolated ones. Individuals kept isolated reach larger length of shell. In the moment of the sexual maturity, the length of the shell in the individuals tha were kept isolated was smaller than the grouped.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Português	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400010	
Editor: 	Sociedade Brasileira de Zoologia	
Relação: 	10.1590/S0101-81752001000400010	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zoologia  v.18 n.4 2001	
Fonte: 	info:eu-repo/semantics/openAccess