El sexo fue determinado con base en la presencia del telico en las hembras (H) y
petasma para los machos (M).
It is a dioecious species and exhibits sexual dimorphism with characteristic secondary sexual structures ([male]:
petasma, [female]: thelycum).
[39.] Haran N, Mallo J, Fenucci J (2004) Density influence on growth and development of the
petasma in juvenile shrimps Pleocticus muelleri (Decapoda, Penaeoidea).
Efecto de la densidad sobre el crecimiento y el desarrollo del
petasma en langostinos juveniles Pleoticus muelleri (Decapoda, Penaeoidea).
The reproductive status of males was assessed by examining the shape of the
petasma, which is fused in adult individuals.
et al., 1963; Nobel, 1964; James, 1968; Ameer-Hamsa, 1973; Zou and Fingerman, 2000; Benetti and Negreiros-Fransozo,2004), periopods (Nickerson and Grey Jr., 1967),
petasma (Sivalingam and Rao, 1968) and the abdomen form (Young, 1933; Mantelatto et al.,2003; Hugo and Michel, 2005; Gregati andNegreiros- Fransozo, 2009).
The identification of sex was made according to Mota-Alves and Rodrigues (1977), based on the characterization of external organs, telic (female) and
petasma (male).
In the western Atlantic Ocean, Perez-Farfante (1969, 1970, 1971a) described diagnostic characters of the genus Farfantepenaeus that allowed identification of individuals in the range of 8-20 mm CL (carapace length) on the basis of the following morphological features: 1) changes in the structure of the
petasma and thelycum; 2) absence or presence of distomarginal spines in the ventral costa of the
petasma; 3) the ratio between the keel height and the sulcus width of the sixth abdominal somite; 4) the shape and position of the rostrum with respect to the segments and flagellum of the antennule; and 5) the ratio between rostrum length (RL) and carapace length (RL/CL).
Shrimps were sexed according to the presence (males) or absence (females) of the
petasma (Hendrickx, 1995).
The sex of each specimen was determined by the presence of the thelycum and
petasma, for females and males respectively.
Sex was determined by the presence of the
petasma for males or the thelycum for females (Ohtomi et al.