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Population aspects of Processa hemphilli shrimp Manning & Chace, 1971 (Caridea: Processidae) in Ubatuba bay, SP, Brazil

Grant number: 18/24949-3
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2019
Effective date (End): May 31, 2020
Field of knowledge:Biological Sciences - Zoology
Principal Investigator:Rogério Caetano da Costa
Grantee:Natália Bosco Talamonte
Home Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Processa hemphilli Manning & Chace, 1971 (Caridea: Processidae) inhabits the West coast of Atlantic ocean, since North Carolina, United States of America, to Buenos Aires, Argentina. They are nocturne shrimps, relatively small, reaching up to 14mm of total body body lenght, which, consequently, make them a specie of no commercial interest and difficults their colletion, therefore, studies about their biology are scarce. The main objective of the present study will be to investigate certains aspects of the species populacional dynamics in Ubatuba Bay, SP, Brazil, like morfological sexual maturity by means of relative growth, fecundity and seasonal reproductive investiment in order to analyze the time of greatest reproductive intensity and to determine the size of the eggs and the sex ratio in each season of the year. For that, there were seasonally collected between the winter of 2018 and the fall of 2019 in the bay of Ubatuba, at dusk, with a shrimp fishing boat through a mini "otter-trawl" type net. During the sampling period, abiotic factors such as temperature and salinity of the water and organic matter content of the sediment were and will be collected. Shrimp will be identified in terms of species, measured, weighed and separated by sex. Based on the data obtained, relevant statistical analyzes will be carried out for each proposed objective.

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