01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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Resultados da Pesquisa
Item Hábito alimentar de Pachygrapsus transversus (Gibbes, 1850) (Brachyura: Grapsidae) em um ambiente recifal na praia de Gaibú (Pernambuco-Brasil)(2021-12-17) Pinto, Rômulo Marinho Falcão; Melo Júnior, Mauro de; Santana, Julianna de Lemos; http://lattes.cnpq.br/9898797268971400; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/8561109253699688The aim of this study was to discribe feeding behavior of Pachygrapsus transversus (Gibbes, 1850, in the beach of Gaibú, verifying the occurence frequence, abundance and relative contribution of each food item in total volume of ingested food, comparing data between different aspects such as sex, stage of moltcicle, sample locals and seasonality on collected sample group in Gaibú beach, considering that this is one of the most common species of the Grapsidae Family in brazilian and northeanstern coast which have known influence in different trophic levels, potentiated factor by their abundance and omnivorous habit. The samplings were realized monthly during the sizygy tides between the period of september/2018 and september/2019, there were determinated two points of sampling, point 1 beying near the beach and point 2 beying closer to the sea. There was used the point method to calculate the occurence frequence, relative contribution and food index of each item. The chi-square test (X²) with significance level at 5% (a = 0,05), for analyze possible diferences between both sexes. The ER (stage of repletion) is related to how much each stomach is full, there were defined 3 stages for ER, which are: low fullness (E1), medium fullness (E2), total fullness (E3) and empty (E0). Each repletion stage recives one value to be integrated to the calculations of the poiting method, for calculate the food index, relative contribution and the relative frequence of each food item. The results showed one variety of 15 food itens: algae, mond, shell fragments, sea urchin thorn, amphipoda, sedment, eggs, microplastic, gastropoda, mite, isopoda, stomatopoda, copepoda, chironomidae larva, coleóptera, beying these vegetable and animals food, characterizing, thus, their omnivory also in the local of this study. Mond and algae were the most representative itens showing, respectively, 59.73% and 55.75% of volume in the stomach contente. The presence of sedment and other food itens rich in minerals showed changes according to the moltcicle stage, indicating that can variate accordingly the bigger necessity of minerals, as a result of the formation of the carapace in cases of individuals in the pre molt and post molt phases. There were verified the presence of microplastic in 22.79% of stomachs, in the form of blue and red fibers. There were not found significant difference in relation to the food index between male and female, as in referente to the feeding in general as in ingestion of microplastic. However, in a smaller scale, looking to the relative frequence, there was found more microplastic in ovigerous females, indicating a bigger susceptibility to the contamination by them, what can be explained by the bigger quantity of food ingested by ovigerous females, because of the bigger energy demand.Item Ecologia trófica de Coleodactylus meridionalis (Boulenger, 1888)(Squamata, Sphaerodactylidae) Nordeste, Brasil(2021-12-17) Ferreira, Christian Felipe de Barros; Moura, Geraldo Jorge Barbosa de; Tinôco, Moacir Santos; http://lattes.cnpq.br/0433618384031837; http://lattes.cnpq.br/1348666346504103; http://lattes.cnpq.br/1718763845321714The genus Coleodactylus is composed of five species distributed in South America, but with a low degree of study about it. The Coleodactylus meridionalis, one of the species of the genus, has a wide distribution in the Brazilian territory, occupying several habitats in the Caatinga, Restinga, ”Brejos de altitude” and Atlantic Forest ecosystems. Knowing that the study of diet can tell us a lot about the natural history of the species, this study focused attention on one of the smallest species of lizard in the northeast region of Brazil. Based on the above, the objective was to characterize the trophic ecology of C. meridionalis, identifying prey at the lowest possible taxonomic level and investigating the presence of variation between age and sex, as well as compiling data from the literature that provide information on the trophic ecology of the genus Coleodactylus. The animals used were provided by the Herpetological Collection of the Laboratory of Herpetological and Paleoherpetological Studies of the Federal Rural University of Pernambuco (LEHP- UFRPE), of the Herpetological Collection of the Animal Ecology and Conservation Center of the Catholic University of Salvador (CHECOA-UCSAL) and from the Herpetological Collection of the Regional Center for Ophiology at the Federal University of Ceará (CHUFC-NUROF). Due to the low N of individuals analyzed with stomach content by ecosystem, this work can better understand the trophic patterns of animals from the ”Brejos de altitude”. The animals were measured in relation to snout-vent length (CRC) with a digital pachymeter and opened through a longitudinal incision, having their stomachs removed and opened for analysis of their content, in cases where it was possible to measure the stomach content, these were measured, and identified at the lowest possible taxonomic level, then preserved in 70% alcohol. The diet of the animals analyzed was divided into 8 categories of ingested prey, with hymenoptera (Ants), arachnids (mites, spiders and Pseudoscorpions) and coleoptera (Beetles) being most of the diet of the analyzed lizards. The analysis of variance test (ANOVA) found sexual dimorphism in the species, with females being larger in size compared to males, the study also found the absence of the influence of sex or age on the species' diet, with females, males and juveniles sharing the same diet. This tends to generate intraspecific and interspecific competition since other individuals of the genus also feed on a large part of the diet of C. meridionalis. The largest numbers of prey were hymenoptera, which may demonstrate passive foraging behavior (Sit-and-wait). Data compiled from the literature show the low amount of data on the genus, mainly on diet, where species such as C. brachystoma and C. elizae do not have this type of data studied. This study deepens the knowledge about a genus so little scientifically targeted and with such scarce data, studies that can come to help in the creation of conservation projects and more efficient management of the species and the ecosystems where it lives.