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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Investiga??es preliminares sobre a sesibilidade parasit?ria de duas ra?as de coelhos a Rhipicephalus sanguineus (Latreille, 1806) (Acari:Ixodidae) / Preliminary Investigations on Parasitic Sensitivity of Two Breeds of Rabbits to Rhipicephalus sanguineus (Latreille,1806) (Acari: Ixodidae).

Pinto, Fl?via Santos 28 February 2000 (has links)
Made available in DSpace on 2016-04-28T20:15:28Z (GMT). No. of bitstreams: 1 2000- Flavia Santos Pinto.pdf: 229877 bytes, checksum: 5ac9dc34947f0f90f514886c5e4e15e0 (MD5) Previous issue date: 2000-02-28 / The natural sensitivity of two breeds of rabbit, White New Zealand (WNZ) e California (CA), and their crossbreeds (CB) to Rhipicephalus sanguineus were compared under experimental conditions. Three rabbits of each breed, without previously tick exposure, were infested once with 2300 larvae, 100 nymphs and 40 adults (20 males + 20 females). The experiment with the parasitic phase was conducted in the environment while the free-living phase was conducted under 27 ? 1? C, 80 ? 10 % relative humidity and scotophase. The dynamic of the sensitivity had in the larvae phase a variation statistically significant (p<0.05) in the pr?ecdise period, with the best performance in the CB group. However, the percentage of recovery was greater in the treatment of WNZ. In the adult phase, females of the WNZ group presented a greater mean weight (p<0.0) e did not differ from the Nutritional Efficiency Index(NEI) from CB, which had the best performance. For larvae of the females in the three treatments the only statistic variation (p<0.05) was with the period hatching, where the CA group presented the smallest period, the CB group presented the greatest and the WNZ group did not change statistically in the both. The life cycle in all three groups was very close, without great differences according to the treatment received. / A sensibilidade natural a Rhipicephalus sanguineus de duas ra?as de coelhos, Nova Zel?ndia e Calif?rnia, e seus mesti?os foi comparada em condi??es experimentais. Tr?s coelhos de cada ra?a, sem contato pr?vio com carrapatos, foram infestados uma ?nica vez com 2300 larvas, 100 ninfas e 40 adultos (20 machos + 20 f?meas). O experimento com a fase parasit?ria foi conduzido no meio ambiente enquanto que o da fase de vida livre foi conduzido a 27 ? 1? C, 80 ? 10 % de umidade relativa e escotofase. A din?mica da sensibilidade obteve na fase larval uma varia??o estatisticamente significativa ( p< 0,05) no per?odo de pr?-ecdise com melhor desempenho no grupo Mesti?o, por?m o percentual de recupera??o foi maior no tratamento Nova Zel?ndia. N?o houve diferen?a estatisticamente significativa (p> 0,05) na fase de ninfas, onde o grupo de melhor desempenho foi o Calif?rnia. Na fase adulta , as f?meas do grupo Nova Zel?ndia apresentaram maior peso m?dio(p<0,05) e n?o diferiram para o ?ndice de Efici?ncia Nutricional do tratamento Mesti?o, o qual teve melhor desempenho. Para larvas oriundas das f?meas que passaram pelos tr?s tratamentos a ?nica varia??o estat?stica (p<0,05) foi com o per?odo de eclos?o, onde o grupo Calif?rnia apresentou menor per?odo, o grupo Mesti?o o maior e Nova Zel?ndia n?o variou estatisticamente destes dois. O ciclo biol?gico nos tr?s grupos foi muito pr?ximo, sem grandes diferen?as de acordo com o tratamento recebido.

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