The population density effects on the reproductive biology of the snail Bradybaena similaris (Férussac, 1821) (Mollusca, Gastropoda)

Brazilian Journal of Biology

Cs. De Oliveira²  Mc. Vasconcellos¹  J. Pinheiro² 

[1] ,Universidade Federal Rural do Rio de Janeiro Instituto de Biologia Departamento de Ciências FisiológicasSeropédica RJ ,Brazil

关键词: reproductive biology;    Bradybaena similaris;    galactogen;    biologia reprodutiva;    Bradybaena similaris;    galactogênio;   

DOI  :  10.1590/S1519-69842008000200018

来源: SciELO

【 摘 要 】

The influence of population density on some aspects of the reproductive biology of the snail Bradybaena similaris was studied. Molluscs were maintained under 0.2 (isolated), 0.3, 0.6, 1.0, 1.3 and 1.7 snail/m² densities. The animals maintained under 0.3 and 0.6 snail/m² showed the lowest numbers of eggs laid/snail, being the highest value observed to the 1.7 snail/m². The hatching of the snails maintained under 0.3 snail/m² density, begun at the 21st day after laying, and the maximum time required to the hatching was 36 days was observed to the eggs came from snails maintained under the densities 0.6, 1.0, 1.3 snail/m², respectively. The highest percentage hatchability (55.56%) was observed to isolated snails. The galactogen content in the albumen gland did not seem to accompany the alterations occurred in the reproduction of B. similaris in response to the different population densities.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License