Presentación Oral
POPULATION STRUCTURE AND DYNAMICS OF PARROTFISH SPECIES INSIDE AND OUTSIDE OF A MARINE PROTECTED AREA
Kennedy, S.B.1, Hernandez-Andreu, R.2, Félix-Hackradt, F.C.1, Hackradt, C.W.1
1Centro de Formação em Ciências Ambientais, Universidade Federal do Sul da Bahia
2Universidade Estadual de Santa Cruz
In 2014 species of Brazilian parrotfishes appear on the Official List of Endangered Species: Scarus trispinosus (Endangered – EN), Scarus zelindae (Vulnerable – VU), Sparisoma axillare (Vulnerable – VU) and Sparisoma frondosum (Vulnerable – VU). One of the products after the list was the Recovery Plan for parrotfishes, which includes Sparisoma amplum (Near Threatened - NT). The objective of this work was to evaluate the effect of protection, and secondarily the impact of fishing on the population structure of parrotfishes inside and outside of a marine protected area. The project was developed in the Abrolhos Bank and the sample design used was an asymmetric Beyond-BACI, with three zones of sampling (one protected and two unprotected areas). The methodology used was stationary visual censuses to evaluate the structure and abundance of fish. Of the five species studied, only S. zelindae and S. amplum were not observed in one of the unprotected areas named Cassuruba. S. axillare was observed in greater abundance and S. amplum was the least frequent species. In the protected area (Abrolhos Archipelago) S. trispinosus was the most abundant species. The abundance and biomass data were analyzed using permutations analysis of variance (PERMANOVA). For the total abundance of the species significant differences were observed for the protection factor (F=4,29; p<0,05). Analysing the two genera separately, Scarus demonstrated significant differences in protection (F=8,21; p<0,05), while Sparisoma showed no differences. Regarding biomass, significant differences were observed for the protection factor (F=5,11; p<0,05) and for the contrast of protected x unprotected (F=6,5; p<0,05). Analysing species separately, the abundance and biomass of S. trispinosus, S. zelindae and S. frondosum showed significant differences for the protection. For parrotfish species that are fishing target in the region, the protected area has proven its efficacy, mainly for S. trispinosus.
Palabras clave: PARROTFISHES, POPULATION STRUCTURE, THREATENED