| Full text | |
| Author(s): |
Denadai, Marcia Regina
[1]
;
Bessa, Eduardo
[2]
;
Santos, Flavia Borges
[3]
;
Fernandez, Wellington Silva
[4]
;
da Costa Santos, Fernanda Motta
[5]
;
Feijo, Monica Malagutti
[5]
;
Dias Arcuri, Andreza Cristina
[5]
;
Turra, Alexander
[4]
Total Authors: 8
|
| Affiliation: | [1] Ctr Univ Modulo, BR-11660903 Caraguatatuba, SP - Brazil
[2] Univ Estado Mato Grosso UNEMAT, Lab Ecol Comportamental Reprod, BR-78300000 Tangara Da Serra, MT - Brazil
[3] Univ Estadual Sudoeste Bahia, Dept Ciencias Nat, BR-45083900 Vitoria Da Conquista, BA - Brazil
[4] Ctr Univ Fundacao Ensino Octavio Bastos, BR-13870000 Sao Joao Da Boa Vista, SP - Brazil
[5] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, BR-05508120 Sao Paulo - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Biota Neotropica; v. 12, n. 4, p. 74-83, OCT-DEC 2012. |
| Web of Science Citations: | 8 |
| Abstract | |
This study evaluated the spatio-temporal distribution, reproduction and diet of the catfishes Genidens genidens, G. barbus and Aspistor luniscutis in Caraguatatuba Bay. Their sizes were recorded and the sex and reproductive stage identified. The abundance was compared between areas (South and North) and among months (August 2003 - October 2004). The species had different spatial distributions, allowing them to coexist. The temporal distribution reflected their tendencies to migrate in the reproductive period, as evidenced by the dominance of small immature individuals in the bay. G. genidens tended to reproduce in winter, and A. luniscutis in spring. The diet of G. genidens consisted of crustaceans, mollusks (shells), fish scales, ostracods, and bivalve siphons. G. barbus consumed a high proportion of mysids, followed by fish (bones and scales). For A. luniscutis, the diet was based on fish scales and crustaceans. High quantities of particulate organic matter were observed in the diet of all three species, as previously known for estuarine catfishes. The consumption of fish scales may reflect a lepidophagic habit. A small overlap was observed among the diets, reflecting differences in their environments as well as in the proportions of each item ingested. (AU) | |