03.1 - Graduação (UAST)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2926
Navegar
2 resultados
Resultados da Pesquisa
Item Comunidade de siris (crustacea: decapoda: portunidae) da zona de arrebentação da praia de Jaguaribe e estuário do Rio Jaguaribe, Ilha de Itamaracá, Pernambuco, Brasil(2022-06-03) Noé, Karyna Kelly Bezerra; Viana, Girlene Fábia Segundo; http://lattes.cnpq.br/3338076933519392Crustaceans are important members of tropical benthic communities, serving as food for humans. This study aimed to analyze the biometry, abundance and frequency of the population of Portunid crustaceans from Jaguaribe beach and Jaguaribe river estuary in Itamaracá-PE. The collections were carried out at three points: 1) the surf zone, 2) the river mouth and 3) the estuary. The crabs analyzed in this study are bycatch fish collected by trawling. Soon after collected, the crabs were packed in plastic bags and sent to the Bentos Laboratory (LABENTOS) at UFRPE/UAST. Individuals were identified, sexed and quantified. The data obtained were entered into an electronic spreadsheet for analysis of abundance, frequency and diversity. A total of 190 specimens were identified, distributed in five species: Callinectes danae (Smith, 1869), Callinectes ornatus (Ordway, 1863), Callinectes marginatus (Ordway, 1863), Arenaeus cribrarius (Lamarck, 1818) and Charybdis hellerii (Milne Edwards, 1867). Regarding relative abundance, C.danae was considered a dominant species at all points, obtaining 54% at point 1, 66% at point 2 and 65% at point 3. Arenaeus cribrarius was considered abundant at point 1 with 35% and common at point 2 with 20%, it was not collected at point 3. Callinectes marginatus presented 28% at point 3, being considered common, at point 1 it was classified as occasional with 5%. C. ornatus showed abundance at points 1, 2 and 3 respectively with 5%, 9% and 7%, thus being classified as occasional. Charybdis hellerii was classified as occasional with 5%. In the frequency of occurrence, it was found that C. danae is a species considered euconstant with 82% of the collected sample. C. ornatus and C.marginatus, presented 45% each, thus being constant species. A. cribrarius presented 36% and is considered an accessory species. Considered accidental, C.hellerii with only 18% of the total sample. For diversity the values were low for the river mouth (point 2) and for the interior of the estuary (point 3), and low for the surf zone (point 1). The evenness values were equitable, J'= 0.7276 for the surf zone (point 1), J'= 0.691 for the river mouth (point 2) and J'=0.7555 for the interior of the estuary (point 3). Ancova analysis demonstrated a positive growth relationship between carapace width, carapace length, abdomen width, and weight. Differing only for Callinectes danae in relation to carapace width and abdomen width. The low abundance of Charybdis helleri shows that the species is not endangering native crabs in this locality. This study contributed to increase the knowledge about the crabs on the island of ItamaracáItem Hábito alimentar do siri Callinectes ornatus (Ordway, 1863) (Crustacea: Brachyura: Portunidae) na Ilha de Itamaracá, Pernambuco, Brasil(2024-03-08) Silva, Milene Ferreira da; Viana, Girlene Fábia Segundo; http://lattes.cnpq.br/3338076933519392; http://lattes.cnpq.br/5638616005945547The swimming crab Callinectes ornatus (Ordway, 1863) is a crustacean belonging to the Portunidae family of great importance to the benthic community, given its important role in the trophic web of marine environments. The main objective of this study was to identify and provide information about the composition of the diet of C. ornatus Ordway, 1863 at Itamaracá Island, Pernambuco, Brazil in the period after the oil spill that occurred off the Brazilian coast in 2019, as well as to analyze the occurrence of possible changes in its feeding habits. The specimens analyzed came from accompanying fauna from fish collections carried out in August and September 2020. To obtain the material, a 20-meter long, 1.5-meter high trawl with a 5-millimeter mesh opening was used. Two different points were chosen, one in the surf zone at Jaguaribe beach (7°43'43"S 34°49'29"W) and the other at the mouth of the Jaguaribe River (7°43'19"S 34°49'32"W) on Itamaracá Island, Pernambuco, Brazil. After collection, the material was sent to the UFRPE/UAST Benthos Laboratory for analysis. After sorting, the material was identified, measured and sexed to extract the stomachs of the crabs and assess the degree of stomach filling. To analyze the contribution of each food item, the Point Method, the Frequency of Occurrence and the Food Index were applied. Twelve items were identified in the stomachs of the 104 crabs collected at the collection points. The results obtained indicate that Crustacea, Mollusca and Animal Organic Matter were the items that contributed most to the natural diet of the crabs collected in the surf zone of Jaguaribe Beach and Crustacea, Animal Organic Matter and Plant Organic Matter were the items that contributed most to the diet of the crabs collected at the mouth of the Jaguaribe River. As for the difference in the diet of males and females of the species, it was found that there were no major changes in the diet, with only small changes in the proportions of items. However, Crustacea continued to be the most representative item for both sexes. According to these results, the species' feeding habits are characterized as generalist and opportunistic, with a preference for organisms of animal origin. During the analysis of the material, the presence of oily substances was not identified, indicating the presence of oil in its structures or other internal organs, and the comparison with data from the literature shows that there was no change in the species' natural diet, even after the oil incident, with only the presence of plastic waste in some stomachs indicating exposure to anthropogenic activities along the coastal zone