5 research outputs found
An assemblage of terrestrial isopods (Crustacea) in southern Brazil and its contribution to leaf litter processing
Mating behavior of the freshwater crab Kingsleya attenboroughi Pinheiro and Santana, 2016 (Crustacea: Brachyura: Pseudothelphusidae)
Growth curve of Balloniscus glaber Araujo & Zardo (Crustacea, Isopoda, Oniscidea) from Parque Estadual de Itapuã, Rio Grande do Sul, Brazil Curva de crescimento de Balloniscus glaber Araujo & Zardo (Crustacea, Isopoda, Oniscidea) no Parque Estadual de Itapuã, Rio Grande do Sul, Brasil
Based on field data, this study presents the growth curve of Balloniscus glaber Araujo & Zardo, 1995, a terrestrial isopod species found in Parque Estadual de Itapuã (PEI), Rio Grande do Sul, Brazil. Specimens were monthly sampled, from May 2004 to April 2005, at PEI. Captured individuals were sexed, their cephalothorax width was measured, and the growth curve was described according to von Bertalanffy's model. Male and female growth curves are described by the equations: Wt = 2.256[1-e-0.00394(t+91.128)] and Wt = 2.588[1-e-0.00301(t+101)], respectively. Curves show differential growth between males and females, with females reaching higher W<FONT FACE=Symbol>¥</FONT>, and a slower growth rate than males. Based on theses curves, life span was estimated.<br>Esse estudo, baseado em dados de campo, esse estudo apresenta a curva de crescimento de Balloniscus glaber Araujo & Zardo, 1995, um isópodo terrestre encontrado no Parque Estadual de Itapuã (PEI), Rio Grande do Sul. Os espécimes foram coletados mensalmente, de maio de 2004 a abril de 2005, no PEI. Os indivíduos capturados foram sexados e tiveram o cefalotórax mensurado e a curva de crescimento descrita a partir do modelo de von Bertalanffy. As curvas de crescimento para machos e para fêmeas são descritas pelas equações: Lt = 2,256[1-e-0,00394(t+91,128)] e Lt = 2,588[1-e-0,00301(t+101)], respectivamente. As curvas apresentam crescimento diferencial entre machos e fêmeas, com fêmeas atingindo maior L' mas com uma taxa de crescimento menor do que os machos. Com base na curva foi estimada a longevidade dos animais