Zoological Studies

Vol. 60, 2021

(update: 2021.07.27)
 

Life History Traits of the Snapping Shrimp Alpheus carlae (Decapoda: Alpheidae) from the South-eastern Coast of Brazil

Bianca Ghizelli-Fraga1, Rogerio C. Costa1, and Régis A. Pescinelli1,*

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1Laboratory of Biology of Marine and Freshwater Shrimp (LABCAM), Faculty of Sciences, Department of Biological Sciences, São Paulo State University (UNESP), São Paulo, Brazil. *Correspondence: E-mail: regispescinelli@yahoo.com.br (Pescinelli)
E-mail: bianca.fraga@unesp.br (Ghizelli-Fraga); rogerio.c.costa@unesp.br (Costa)

Received 14 December 2020 / Accepted 19 July 2021
Communicated by Benny K.K. Chan

The life history traits of the snapping shrimp Alpheus carlae were investigated. We evaluated the relative growth, morphological sexual maturity, sexual dimorphism, handedness, fecundity, and egg volume. Sampling was monthly performed in an estuarine region of Cananéia, in the south-eastern coast of Brazil. The following structures were measured to perform the relative growth analysis: length of carapace and second pleura, length, width and height of major cheliped propodus, and length of appendix interna and appendix masculina. Juveniles and adults males and females have different growth patterns, indicating distinct strategies of energy allocation. The estimated carapace length at the onset of morphological sexual maturity of females and males was 5.6 mm and 6.2 mm, respectively. The sexual dimorphism of specific body structures was evident, mainly in the appendix interna of females and major cheliped of males. There was no evidence of handedness in neither females nor males. The mean fecundity of females was 364 ± 204 eggs (mean ± SD) eggs and was positively correlated with the carapace length. The egg volume differed between the developmental stages I and II and I and III, with an overall volume increased of 73.23% and 95.45%, respectively. The results contributed to the knowledge about A. carlae and its life history in natural environment.

Key words: Caridea, Relative growth, Sexual dimorphism, Egg production.

Citation: Ghizelli-Fraga B, Costa RC, Pescinelli RA. 2021. Life history traits of the snapping shrimp Alpheus carlae (Decapoda: Alpheidae) from the south-eastern coast of Brazil. Zool Stud 60:62.