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Vol. 61, 2022
(update: 2022.9.12)
New Insights into the
Life-history Traits of the Night Shrimp Processa hemphilli (Caridea:
Processidae) in the Western Atlantic
Natália Bosco Talamonte1 , Régis Augusto Pescinelli1,*, Abner Carvalho-Batista2, and Rogerio Caetano Costa1
doi:10.6620/ZS.2022.61-42
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: natalia_bosco@hotmail.com (Talamonte); rogerio.c.costa@unesp.br
(Costa)
2Instituto de Ciências da Saúde, Universidade Paulista
(UNIP), São Paulo, Brazil. E-mail: carvbatis@gmail.com
(Carvalho-Batista)
Received 26 October 2021 / Accepted 18
May 2022
Communicated by Benny K.K. Chan
We analyzed sexual dimorphism, sex ratio, relative growth, morphological sexual maturity, fecundity, embryo volume, and reproductive output of a population of the night shrimp Processa hemphilli
from the Southeast coast of Brazil. Sampling was seasonally conducted,
from June 2016 to April 2019 in Ubatuba, São Paulo. Our results showed
the presence of sexual dimorphism in the body size, with females being
larger than males. In addition, there was no difference in the overall
sex ratio. However, it was possible to observe a skewed sex ratio to
males in the smaller size classes, whereas females were more abundant
in the larger size classes. The estimated carapace length at the onset
of morphological sexual maturity of females and males was 3.6 mm and
3.2 mm, respectively. The mean fecundity of females was 285 ± 142
embryos (mean ± SD) embryos and was positively correlated with the
carapace length. The embryo volume differed between the developmental
stages with a constant increase in volume throughout the development
between stages I and III. The mean reproductive output of females was
52.4%. Our results suggest that P. hemphilli have
a pure search mating system, show sex allocation in the growth of body
structures, and that females have high reproductive investment. All of
these results represent the first insights into the life-history traits
of the species in the western Atlantic and contribute to the knowledge
about processid species.
Key words: Decapoda, Relative
growth, Mating system, Sexual maturity, Sex allocation.
Citation:
Talamonte NB, Pescinelli RA, Carvalho-Batista A, Costa RC. 2022. New
insights into the life-history traits of the night shrimp Processa hemphilli (Caridea:
Processidae) in the western Atlantic. Zool Stud 61:42. doi:10.6620/ZS.2022.61-42.
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