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Geographical variation and local environment effects in the reproductive output and fecundity of the shrimp Exhippolysmata oplophoroides (Decapoda: Caridea) in southeastern Brazil

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Autor(es):
Stanski, Gilson [1] ; Carvalho, Mariana M. [1] ; Garcia, Joyce R. [1] ; Goncalves, Geslaine R. L. [1] ; Costa, Rogerio C. [2] ; Castilho, Antonio L. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Sao Paulo State Univ, Inst Biosci Botucatu, Zool Dept, NEBECC Grp Studies Crustacean Biol Ecol & Culture, Botucatu, SP - Brazil
[2] Sao Paulo State Univ, Fac Sci, Biol Sci Dept, Lab Biol Marine & Freshwater Shrimp, Bauru - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 62, n. 2, p. 119-124, 2018.
Citações Web of Science: 2
Resumo

We studied the shrimp Exhippolysmata oplophoroides in southeastern Brazil (Macae, 22037 `' 5; Ubatuba, 23 degrees 55 `' S; and Cananeia, 25 degrees 53 `' S) to test the hypotheses that (1) females should have the same reproductive output and fecundity at the regional scale, and (2) these reproductive parameters can vary among regions. Maximum carapace length (Macae = 13.1 mm, Ubatuba = 12.8, Cananeia = 16), fecundity, and reproductive output differed among regions (Ancova, p < 0.05). Females in Cananeia exhibited the highest reproductive output/fecundity (18.6%/5230 embryos), followed by those in Macae (16.0%/4365 embryos) and Ubatuba (12.6%/1206 embryos). We found that fecundity/reproductive output varies inversely with the length of the reproductive season, i.e. a considerable amount of energy is allocated during seasonal spawning periods in subtropical regions such as Cananeia. Previous studies have proved that E. oplophoroides is able to reproduce continuously in Ubatuba, with probably minor but continuous energy investment in reproduction occurring in this tropical region. In contrast, although Macae is located at tropical latitude, it is under the influence of Cabo Frio upwelling that alters the water's physical properties via cold water intrusion. This process may be a determining factor in the spawning seasonality of Macae's shrimp population, justifying the higher reproductive output recorded here than in Ubatuba. (AU)

Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
Beneficiário:Fernando Luis Medina Mantelatto
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático