Distribuição temporal do ermitão Clibanarius vittatus (Anomura, Diogenidae) no litoral do Paraná

Iheringia. Série Zoologia

Sara R. Sampaio¹  Setuko Masunari¹  Kirstern L. F. Haseyama¹ 

[1] ,Universidade Federal do Paraná Centro Politécnico Departamento de ZoologiaCuritiba PR ,Brasil

关键词: Intertidal hermit crabs;    reproductive period;    intersexes;    sex ratio;    size classes;    Ermitões da zona entremarés;    período reprodutivo;    intersexos;    razão de sexos;    classes de tamanho;   

DOI  :  10.1590/S0073-47212009000300007

来源: SciELO

【 摘 要 】

A study on the temporal fluctuation of the population structure of the hermit crab Clibanarius vittatus (Bosc, 1802) was carried out at Baixio Mirim tideflat, Guaratuba Bay, Paraná State, southern Brazil (25°52'S, 48°36'W). Clibanarius vittatus is a species widely studied, but studies of population biology of these hermit crabs in different regions are scarce. Samplings were done in the intertidal zone, monthly, from April/2005 to March/2006. A total of 1187 hermit crabs were obtained, among which, 949 males, 22 intersexes, 204 non-ovigerous females and 12 ovigerous females. The cephalothoracic shield length (CSL) was measured and grouped in 10 size classes. Males were distributed in 10 CSL classes while intersexes and females occurred only in six size classes. Males predominated in every month and in the whole population. All demographic categories were present all year round, except intersexes and ovigerous females. These were uncommon and occurred from late spring until autumn and in august/2005. The reproduction was considered seasonal-continuous, with higher intensity in the warmer months. The observed sex ratio in this population, that was different from other ones, corroborates the theory of migration for this species. The present research constitutes the first record of reproductive period of C. vittatus population occurring in warm subtropical shallow waters.

【 授权许可】

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