| Full text | |
| Author(s): |
da Silva, Thiago Elias
[1]
;
de Andrade, Luciana Segura
[2]
;
Fransozo, Vivian
[3]
;
de Moraes Freire, Fulvio Aurelio
[4]
;
Fransozo, Adilson
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Zool, Campus Botucatu, Dist Rubiao Jr S-N, BR-18618970 Botucatu, SP - Brazil
[2] UFTM, Campus Iturama, Ave Rio Paranaiba 1295, BR-38280000 Iturama, MG - Brazil
[3] Univ Estadual Sudoeste Bahia, Campus Vitoria da Conquista, Estr Bem Querer, Km 4, BR-45031900 Vitoria da Conquista, BA - Brazil
[4] Univ Fed Rio Grande Norte UFRN, Ctr Biociencias, Campus Univ Lagoa Nova, Caixa Postal 1524, BR-59072 Natal, RN - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | BOLETIM DO INSTITUTO DE PESCA; v. 44, n. 1, p. 1-9, 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
To test the hypothesis of differential occupation of depths by demographic groups of A. cribrarius, their population structure, spatial-temporal distribution and sex ratio were studied, taking environmental factors into consideration. The animals were collected monthly during one year in Ubatuba, southeastern coast of Brazil, at nine different depths. There was no deviation from the pattern 1: 1 sex ratio, and also no significant difference in size between the sexes. Reproductive activity was continuous, but more intense in the summer. It was possible to verify that there is differential occupation of space by demographic groups of A. cribrarius. Juveniles occupy shallower regions, which probably provide them with protection of predation. Adult males are more often collected in regions near these juveniles, probably in order to maximize the chances of finding primiparous females. Finally, adult females were more associated to deeper regions, where larval dispersal is facilitated by the influence of the movement of water mass. (AU) | |