masterThesis
Biologia populacional do caranguejo goiamum (Cardisoma guanhumi Latreille, 1828) em áreas com diferentes perfis de uso e ocupação de reserva extrativista marinha
Fecha
2019-05-31Registro en:
GUIMARÃES, Luís Wagner Ferreira. Biologia populacional do caranguejo goiamum (Cardisoma guanhumi Latreille, 1828) em áreas com diferentes perfis de uso e ocupação de reserva extrativista marinha. 2019. 77f. Dissertação (Mestrado em Ecologia) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2019.
Autor
Guimarães, Luís Wagner Ferreira
Resumen
Extractive Reserves are conservation units whose objective is to guarantee the
sustainable use of natural resources by traditional extractive populations. The
Acaú-Goiana Extractive Reserve is located in the estuary of the Goiana river, on
the border of the states of Paraíba and Pernambuco, and involves areas of Atlantic
forest, restinga, mangroves and apicums, being an important supplier of fishery
resources such as Goiamum (Cardisoma guanhumi LATREILLE, 1828). The
goiamum inhabits mainly the transition areas between the mangroves and areas
of forest or restinga, known as apicuns. Due to the intense fishing exploitation and
the marked degradation of its occurrence, C. guanhumi has been included in the
list of endangered species, which imposes a series of restrictions of use and
management measures aimed at the recovery of the populations and their habitat.
Thus, the present work aims to analyze the population and fishing dynamics of
the species, comparing areas of family farming (very common in the reserve) and
preserved areas, aiming to subsidize effective management measures for the
species in a territory with multiple anthropic activities. To date, 1619 burrows
were sampled in the area and 500 animals were analyzed in the laboratory. The
results indicated that there were significant differences between the two sampled
areas in relation to the abundance of occupied burrows (ꭓ² = 12,929, df = 3, p
<0.01), as well as in the carapace width - CW (ꭓ² = 1,186, df = 1, p <0.001) and
weight (ꭓ² = 34,950, df = 1, p <0.001) of the subjects. However, there were no
differences in burrow densities, abundance of empty burrows, moulting, and
captured animals. There was also no difference in gonadal maturity size, LCxPeso
ratio and condition factor between areas of agriculture and preserved areas. C.
guanhumi is a generalist species, able to survive in environments altered by
humans. However, management measures are necessary in relation to the zoning
of agricultural activities, as well as the techniques and types of cultivation, which
minimize the suppression of habitats and allow a greater growth and conservation
of the species.