03.1 - Graduação (UAST)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2926
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Resultados da Pesquisa
Item Dieta do siri Arenaeus Cribrarius (Lamarck, 1818) (Crustacea: Brachyura: Portunidae) da Ilha de Itamaracá, Pernambuco, Brasil(2022-10-04) Pereira, Ruth Simão; Viana, Girlene Fábia Segundo; http://lattes.cnpq.br/3338076933519392; http://lattes.cnpq.br/9492033404642705Arenaeus cribrarius, is a species of swimming crab of the Portunidae family of potential commercial value. This study aimed to analyze the stomach content of A. cribrarius specimens, collected at the mouth and surf zone of Jaguaribe Beach, Itamaracá-PE Island, in order to provide information on the composition of the natural diet of the species, as well as the characterization of their eating habits. The crabs analyzed were derived from the accompanying fauna of fish collections carried out through fishing with trawl of 20 m long, 1.5 m high and 5 mm mesh opening, carried out between July 2019 and January 2021. Two points were selected for the material collection: 1) Surf zone and 2) River mouth. For each point were performed two trawls with an interval of three minutes, once a month at low tide. After the collection, the crabs were transported to the Bentos laboratory (LABENTOS) of UFRPE/ UAST to perform the analyzes. After screening, the stomachs were removed from the visceral cavity and classified, performing prior to the withdrawal of the stomachs, a visual analysis, in order to identify the presence of oil stains in the internal whether the opening of the stomachs for identification of food components and qualitative-quantitative analyzes. From the analysis of the stomach contents of 64 specimens, 18 items of the diet of A. cribrarius distributed in the surf zone and mouth of this region were identified. The results obtained through the methods of points and frequency of occurrence, indicate that Crustacea and Osteichthyes were the most preferred items for both points of the species. For the male and female category, Crustacea was predominant, with overlapping of the other items. For the adult and juvenile category of the surf zone Crustacea and Osteichthyes were the most consumed by adults and only Crustacea for juveniles; for the mouth the item Crustacea was the most consumed for the area category. For the collection points (breaking zone and mouth) the food preference of the species is given by the items Crustacea followed by Osteichthyes, a factor probably associated with the proximity between the points and the high availability of these resources in the environment. For both seasonal periods in the analyzed points, Crustacea was the most intensely consumed item, followed by secondary items that overlapped in both periods and for both methods used. Significant differences were observed for the categories female and male, adult and juvenile seasonality. Even in small amounts, when compared to the other items, the presence of MPs in the stomachs of A. cribrarius presented significant frequency in the stomachs, suggesting that the species was exposed to remnants of human activity on Jaguaribe beach. The presence of oily substances in the external structures of the animals and their absence in the stomachs and other internal organs were not detected throughout the material analysis; data showed that there were no changes in the feeding of the species present in that locality after this episodeItem Variação ontogenética do caranguejo Goyazana castelnaui h. milneedwards, 1853 (brachyura, trichodactylidae) no semiárido do Brasil.(2021-02-26) Almeida, Diógenes Santos de; Mendes, Renata Akemi Shinozaki; http://lattes.cnpq.br/2026358226342858; http://lattes.cnpq.br/6192430195288587Geometric morphometry is a low-cost analysis method, in which it is possible to transform data obtained from anatomical landmarks, providing detailed knowledge about the shape of the animal, including aspects about ontogeny and sexual dimorphism. Brachyurous grow through seedlings that continue to occur successively throughout growth, leading individuals to present body patterns, developing characteristics of sexual and age dimorphism. The species Goyazana castelnaui is of great ecosystem importance for the Pajeú River basin, especially because it is the only brachyurous species found. With this, the objective of this work was to know the ontogenetic trajectory and to identify morphometric variations of the crab G. castelnaui. To carry out this work, 36 females, 43 males and 162 juveniles (unidentified sex, still in the female's abdominal cavity) were collected in the Pajeú River, in the brazilian semiarid region. Crabs were analyzed on the carapace, pleon and right cheliped, which were photographed with individuals parallel to the plane, and 04 anatomical landmarks and 07 semi-landmarks were selected on the carapace; 03 landmarks and 10 semi-landmarks in the pleon and in the cheliped 03 landmarks and 07 semi-landmarks. In the analysis of principal components (PCA), the main variations occurred in the frontal and posterior region in the carapace, in the posterior and anterolateral region of the pleon and in the base of the fixed finger in the cheliped. In the analysis of canonical variation there was significant variation between genders as well as between juveniles and adults (p<0.05, Hotelling test with Bonferroni correction), and through the analysis of the discriminant (p<0.05) the carapace, pléon and chelipod obtained correct allocations that varied between 89.3% and 100.0%. The ontogenetic trajectory in G. castelnaui can be observed through the regression scores of the canonical correlations as a function of the centroid size, in which the carapace showed constant dimorphism reaching similar centroid sizes for both males and females (p>0.05); the pleon and the cheliped when juveniles, there was no separation of groups (dimorphism), with variation and change as they grew (ontogenetic trajectory) reaching different centroid sizes (p <0.05), in females reaching a larger size in the pléon and in the males a larger size in the chelipods, consistent with the monophyletic theory of the Brachyura.