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
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
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.