01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Acompanhamento atividades de pesquisas em biologia reprodutiva Anisotremus surinamensis (Bloch, 1791) capturado no litoral norte de Pernambuco, Brasil(2021-07-16) Leite, Rafael Barros; Oliveira, Paulo Guilherme Vasconcelos de; http://lattes.cnpq.br/5700488412022830; http://lattes.cnpq.br/3233322973038222Item Biologia reprodutiva de Neocallichirus maryae Karasawa, 2004 (Crustacea, Decapoda, Callichiridae) na praia de Mangue Seco, Igarassu, Pernambuco, Brasil(2020-01-27) Matoso, Marcos Antonio Lima; Carvalho, Mônica Lúcia Botter; Costa, Larissa Bacelar da; http://lattes.cnpq.br/6227388035808608; http://lattes.cnpq.br/1762304533046987; http://lattes.cnpq.br/4408208899837080The present work aims to study the reproductive biology of the ghost shrimp Neocallichirus maryae Karasawa, 2004, on the Mangue Seco beach, north coast of Pernambuco. Thus, intending to contribute with unprecedented information to fill this gap. Collections were carried out, monthly, at Mangue Seco beach during low tide, between September 2018 and October 2019. The females were collected using a manual suction pump and sieves. In the laboratory, the abundance of ovigerous females (OF) in relation to non-ovigerous females, the length of the cephalothorax (CF), size of sexual maturation, reproductive period, embryonic development stage, fecundity, egg volume and reproductive effort (RE) were analyzed. A total of 358 females were collected, 48 OF and 301 non-ovigerous females. The CF of non-ovigerous females ranged from 5.98 mm to 17.97 mm with an average of 13 mm (± 1.976), however for OF the measures ranged from 9.37 mm to 16.48 mm with 13.34 (± 1.970); defining the size of the sexual maturity as the FC measurements between 9mm and 9.5mm. The occurrence of reproductive period was observed during the dry season (between December / 2018 to March / 2019), which is expected as a standard for decapods. The 3 stages of embryonic development were found during the reproductive period. Fertility ranged from 1057 to 3784, with an average of 2001.4 ± 815.04. The number of eggs increased significantly following the size of the females. The average egg volume was 0.157 mm³ (± 0.021) for stage I, 0.091mm³ (± 0.038) for stage II and 0.065 mm³ (± 0.026) for stage III. The average ER was 0.0601 ± 0.241. With dry weight of the egg mass representing only 0.78% of the dry weight of the females. The aspects about reproductive biology studied for the population of N. maryae follow similar patterns to the other studies done for the group of ghost shrimp worldwide. Finally, this study brings new information about Neocallichirus maryae, filling in some gaps and enabling future research on the species.Item Aspectos reprodutivos e caracterização dos otólitos do agulhão Tylosurus acus acus (Lacepède, 1803) no Arquipélago de São Pedro e São Paulo, Brasil(2022-05-27) Falcão, Alice Cabral Delgado; Oliveira, Paulo Guilherme Vasconcelos de; Bezerra, Natália Priscila Alves; http://lattes.cnpq.br/5613525779232672; http://lattes.cnpq.br/5700488412022830; http://lattes.cnpq.br/3782971920533955The sailfish Tylosurus acus acus is a subspecies of belonid resident and abundant in the São Pedro and São Paulo archipelagos, for which there are no documented data on its biology throughout the South Atlantic Ocean. Reproduction and characterization of otoliths are important aspects to be studied, and unknown for T. acus acus. This study will provide the first information on the biology and characterization of otoliths of this species. From March 2019 to March 2020, 120 gonads were collected, measured, weighed, and used for the reproductive study, while 101 pairs of otoliths were collected. Gonads were classified macroscopically according to the Brown-Peterson scale. The ratio of gonads to each other was proposed by Schaeffer (1956). Mean length at sexual maturity was calculated using the relative frequency of adults per length class. Morphological characters were rostrum, antirostrum, acoustic sulcus, ostium, tail, and margins. The measures used for the calculated heights were morphometric measurements, length, and weight of the otolith, which were correlated with each other and with length. The observed sex ratio was 3.4F:1M, which could be due to sex separation. The monthly distribution of the proportion of maturation periods indicates that the site is likely a breeding area for the species. Abiotic and biotic factors, especially temperature, are essential for biological changes in the species. Correlations between high individuals suggest that measures of growth together and how they grow, as well as otolith changes. The information obtained in this study may contribute to the conservation of the Atlantic Ocean.Item Biologia reprodutiva do bonito-listrado, Katsuwonus pelamis (Perciformes: Scombridae), no Arquipélago de São Pedro e São Paulo, Brasil(2021-03-05) Xavier, Victória Sincorá; Hazin, Fábio Hissa Vieira; Bezerra, Natalia Priscila Alves; http://lattes.cnpq.br/5613525779232672; http://lattes.cnpq.br/2479583060761727; http://lattes.cnpq.br/3068003817335469Item Biologia reprodutiva e ecologia trófica do peixe Larimus breviceps (Perciformes: Sciaenidae) no litoral da Paraíba(2021-01-29) Silva, Lucas Vinícius Santos; Frédou, Flávia Lucena; http://lattes.cnpq.br/4779271407117528; http://lattes.cnpq.br/5258131874570501The shorthead drum Larimus breviceps is one of the main bycatch species of the shrimp fisheries in Brazil. However, studies addressing the biology and fisheries impacts on this species are still scarce (e.g., macroscopic, and microscopic ovarian maturation, oocyte development, seasonal variation in the diet, morphometric attributes, isotope analysis). Here, we describe the main aspects of the reproductive biology and the feeding ecology of L. breviceps on Paraíba, northeast Brazil. A total of 970 individuals (549 females and 421 males) were caught between December 2016 and November 2017 through a beach seine. The total length (TL) varied from 4.2 to 23.0 cm. Females dominated over males (1 female: 0.77 male). The gonads were described by macroscopic and microscopic analysis. The ovaries were composed by oogonia, pre-vitellogenic, vitellogenic, mature and atretic oocytes. Thereafter, the following stages were thus defined for females: immature, initial development, advanced development, mature and regressing. The period of highest reproductive activity occurs between November and March and immature individuals occur throughout the year. The mean length at first maturity (L50) was 11.1 cm TL. To the feeding ecology study, a subsample of 419 stomachs were analyzed. The total length (TL) varied between 6.3 and 19.2 cm. Nine feeding categories were defined for L. breviceps. Sergestidae was characterized as the main prey (IAi=83%). The diet composition displayed a different pattern for juveniles and adults. Significant differences were found for peduncle flatness index and body flatness index in 49 individuals (27 juveniles and 19 adults); indicating that adults are faster swimmers than juveniles. A total of 40 individuals (dry season = 20; rainy season = 20) were selected for stable isotope analysis. Differences were found in δ13C values for different size classes in the dry season, with juveniles feeding on preys with higher δ13C levels than the adults. The shorthead drum had a trophic level between the third and fourth position, classifying the species as a carnivore predator. The information provided here contributes to the overall knowledge of this species and may be useful for further development of management practices that ensure sustainability of marine species exploitation.