Made available in DSpace on 2014-12-17T14:02:04Z (GMT). No. of bitstreams: 1 FrancileneMSR.pdf: 883736 bytes, checksum: 9ff46764b05c435a2c7a5daee094527a (MD5) Previous issue date: 2006-12-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The species psaroniocompsa incrustata (Lutz, 1910) was studied in relation to its abundance in different and seasonal periods, the physico-chemical of the breending ground and the fauna predation added to the immature of the species. The study was developed during eight months, from April to July, 2005 (rainy season) and from October, 2005 to January, 2006 (drought season), in one natural breending ground situated in the Pium river, that is part of the hydrographical basin of the Pirangi river in Rio Grande do Norte. The immature of Simuliidae were collected manually in vegetal substrate. At the same place, it was made one sampling of the associated fauna using Suber collectors and the measurement of the environment variants. It was also made one analysis of the stomach content of possible enemies of the simul?deos, to observe the predation of the associated fauna. It was collected 7.713 samples, all from de species P. Incrustata, it was observed a bigger abundance in the drought season, and the entomologic fauna associated totalizing 20.1314 species, distributed in the kinds: Diptera, Ephemeroptera, Odonata, Trichoptera, e Hemiptera, with a bigger representativity of Dipteros. The analysis of the stomach content of the species from the families Libellulidae and Hydropsychidae showed the presence of the simul?deos in only 4% of the material analysed, therefore it was not confirmed the presence of one efficient biological control of the simul?deos in this breending ground / A esp?cie Psaroniocompsa incrustata (Lutz, 1910) foi estudada quanto a abund?ncia em per?odos sazonais diferentes, a f?sico-qu?mica do criadouro e a preda??o da fauna associada sobre os imaturos desta esp?cie. O estudo foi realizado durante oito meses, abril ? julho de 2005 (esta??o de chuvas) e outubro/2005 ? janeiro/2006 (esta??o de seca), em um criadouro natural localizado no rio Pium, pertencente a Bacia Hidrogr?fica do rio Pirangi, no Rio Grande do Norte. Os imaturos de Simuliidae foram coletados manualmente em substrato vegetal. Nesse mesmo local, foi realizada a amostragem da fauna associada utilizando-se coletor do tipo Surber, e as medi??es das vari?veis ambientais. Para observar a preda??o da fauna associada, foi realizada a an?lise do conte?do estomacal de poss?veis inimigos naturais dos simul?deos. A coleta dos imaturos resultou em 7.713 exemplares, todos da esp?cie P. incrustata, sendo a sua maior abund?ncia observada na estac?o de seca, e a entomofauna associada, totalizou 20.314 esp?cimes, distribu?dos nas Ordens: Diptera, Ephemeroptera, Odonata, Trichoptera e Hemiptera, com maior representatividade dos d?pteros. A an?lise do conte?do estomacal dos esp?cimes das fam?lias Libellulidae e Hydropsychidae revelou a presen?a de simul?deos em apenas 4% do material examinado, n?o sendo constatado a realiza??o de um eficiente controle biol?gico por parte destes, sobre os simul?deos, nesse criadouro

Made available in DSpace on 2014-12-17T14:02:04Z (GMT). No. of bitstreams: 1 AdrieleNBS.pdf: 991262 bytes, checksum: 88abd567586e81bf3d057a2e257bf611 (MD5) Previous issue date: 2006-12-15 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The larval instars, seasonal occurrence and environmental factors influence on Psaroniocompsa incrustata (Lutz, 1910) (Diptera: Simuliidae) immature were studied according to its physical and chemical aspects of breeding water. Four collects were made at vegetal substrate from margin, middle and floating on the Pium river, city of N?sia Floresta, state of Rio Grande do Norte, Brazil at dry and wet season. Some of larval characters were used to determinate the larval instars number like lateral length of cephalic capsulae, antennae and the distance among cephalic apodema, as well as pH, water temperature, width, depth, stream velocity, discharge and pluviometric precipitation were used for physical factors. Seven larval instars were determined for this P. incrustata community being the lateral length of cephalic capsulae as the best structure with this meaning propose. The seasonality immature abundance of this species were found in dry season and a positive correlation with pH, stream velocity and precipitation / A esp?cie Psaroniocompsa incrustata (Lutz, 1910) (Diptera: Simuliidae) foi estudada quanto ao n?mero de est?dios larvais, ocorr?ncia sazonal e a influ?ncia dos fatores ambientais sobre os imaturos, com a caracteriza??o f?sica e qu?mica da ?gua do criadouro. A pesquisa em campo foi realizada no rio Pium, munic?pio de N?sia Floresta, estado do Rio Grande do Norte, Brasil. Para per?odos distintos (chuva / seca) ocorreram quatro coletas. As coletas dos imaturos de P. incrustata foram feitas diretamente do substrato vegetal localizados ?s margens, no leito e ? deriva do rio. Para a determina??o dos est?dios larvais foram mensurados o comprimento lateral da c?psula cef?lica, da antena e da dist?ncia entre os ap?demas cef?licos. Foram registrados: pH, temperatura da ?gua, largura, profundidade, velocidade, vaz?o e precipita??o pluviom?trica. Sete est?dios larvais foram determinados para esta popula??o de P. incrustata, sendo o comprimento lateral da c?psula cef?lica a estrutura que melhor delimitou os est?dios. A abund?ncia dos imaturos de P. incrustata variou sazonalmente, encontrando-se em maior quantidade no per?odo de seca, correlacionando-se de forma significativa com o pH, velocidade da ?gua e precipita??o pluviom?trica