Bacharelado em Ciências Biológicas (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/5
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
Navegar
2 resultados
Resultados da Pesquisa
Item Ecologia trófica e migração vertical de Diaphus brachycephalus na Região Norte do Brasil(2024-03-08) Generozo, Roberta Domingos; Frédou, Thierry; http://lattes.cnpq.br/8119220407894290; http://lattes.cnpq.br/0486964779126254Lanternfish (Myctophidae) are among the most abundant vertebrates in the world, they connect the oceanic vertical layers and represent an important trophic link between zooplankton and large consumers. However, despite its importance, there is still a lack of studies and information regarding some aspects of its ecology. Therefore, this study investigated the trophic ecology and vertical migration of the species Diaphus brachycephalus in the Northern Region of Brazil, as well as characterizing the composition and the most important items in the diet, evaluating the breadth of the trophic niche and evaluating the dietary difference concerning depth and period of day. To investigate trophodynamics, the specimens' stomachs and contents were analyzed. To define migration patterns, the vertical distribution of the species was observed during periods of day and night. Of the 83 stomachs analyzed, all of them contained prey in their contents. In total, 20 types of food items were found. The diet was mainly composed of crustaceans and molluscs. The breadth of the trophic niche showed that D. brachycephalus has a generalist diet. The multidimensional analysis (nMDS) result showed that the factors, period of day and depth did not influence feeding patterns. Vertical distribution patterns showed that during the day, the species predominated in upper mesopelagic waters, with a small part of the population also present in lower mesopelagic regions. At night, its distribution peaked in superficial epipelagic regions, with part of the population also present in upper and lower mesopelagic regions. The study showed that crustaceans were the most abundant and important group for D. brachycephalus. The species was classified as an asynchronous migrant, as only part of its population migrated at night. It was also classified in Group II as a vertical migrant with an upper mesopelagic distribution.Item Ecologia trófica de Amphisbaena vermicularis Wagler, 1824, (Squamata, Amphisbaenidae) Nordeste, Brasil(2021-12-17) Silva, Pedro Vinicius Freire Guedes da; Moura, Geraldo Jorge Barbosa de; Maciel, Renata Perez; http://lattes.cnpq.br/9083555957024860; http://lattes.cnpq.br/1348666346504103; http://lattes.cnpq.br/5792351278939394Amphisbaena vermicularis is a legless reptile with reduced vision, but with good chemical and sound perception. It is a fossorial animal, the difficulty in studying its behavior, distribution, and ecology. The objective of this work is to analyze the diet of Amphisbaena vermicularis, as well as the parameters related to the trophic ecology of the research. A total of 57 animals (16 males, 14 schoolchildren, 24 juveniles, and 3 unidentified) from the herpetological collection of the Universidade Federal do Ceará were transported. For each individual, eight morphometric measurements were taken: cloacal rostrum length, mandibular width, body width, body height, head width, head width, head length, and tail length, these measurements were used to quantify the degree of sexual dimorphism of the species. Stomach contents were developed and measured in length and width. Of the 57 holding 32 aggregates with empty stomachs, while 25 had identifiable prey in the digestive tract, the most found item was Formicidae, with a frequency of 44.12%, followed by Blattaria with 23.53%, Coleoptera larvae with 17 .65%, Isoptera with 8.82%, and Coleoptera and Araneae tied with 2.94%, totaling 137 food items. Statistical tests indicated an absence of variation between the diet of males, persists, and juveniles. The results of the present work reveal that A. vermicularis is a generalist predator feeding on arthropods randomly, according to their body capacity.