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Previous issue date: 2009-02-20 / The objective of the present study was to describe the biological aspects of Argas
(Persicargas) miniatus in controlled conditions to 27?1?C and 80?10% (RH) and outdoor
condition. The eggs originated of A. (P.) miniatus females were incubated in conditions
mentioned above. The emerged larvae were fed in chick, while the nymphal and adult stages
were fed in chicken. The nymphal instars biological characteristics were studied to 15, 30 and
60 days fast periods. The biological aspects of nymphal and adult stages were studied in
outdoor condition in the dry (May to October) and rainy (November to April) station. The
feeding time, recovery percentage, mortality percentage, weight before and after feeding,
molting periods, preoviposition and oviposition, daily eggs output, incubation period,
hatching percentage, estimated reproduction and nutritional index were evaluated. The larvae
medium weight was 0,94 ? 0,13mg with a medium weight gain of approximately 81,37 times.
In acclimatized camera the molting medium period was 6,37?0,24 days, while in outdoor
conditions it was 8,12?0,95 days. When evaluated the larvae fixation capacity submitted to
different fast periods was observed that unfed larvae maintained in acclimatized camera and
outdoor conditions were capable to attachment in birds with fast periods from 6 to 75 days
and 8 to 60 days, respectively. When nymphs were submitted to 15 and 30 days fast periods,
in both conditions, the development of second and third nymphal instars happened. When
submitted to 60 fast period days were verified mortality of 28 and 37% in acclimatized
camera and outdoor condition, respectively and survivors do not attachment on the hosts. The
nymphs of second instar submitted to 60 fast days developed, in both conditions, in third
nymphal instar and male adults. Still in the group submitted to 60 fast days, the nymphs of
third instar developed in adults (42,42% and 40,54% males; 36,36% and 48,65% females in
outdoor condition and acclimatized camera, respectively) and the others developed in third
nymphs instars, and further, developed in female adults. The medium number of produced
eggs varied of 46 to 138 eggs in the 18 female s oviposition maintained in controlled
conditions; 41 to 108 eggs in the 9 female s oviposition at the rainy station; and 74 to 138
eggs for the females at the dry station, with significant difference in all experimental
conditions. The medium duration of the cycle with adults occurrence in N2 was 49.05 days in
acclimatized camera, 53.01 days in the dry station and 67.41 days in the rainy station. The
results obtained in the present study demonstrate that the biological aspects of A. (P.) miniatus
are influenced by climatic factors, occurring a biological cycle prolongation during the dry
station, period that the temperature is lower. / O objetivo do presente estudo foi descrever os aspectos biol?gicos de Argas (Persicargas)
miniatus em condi??es controladas a 27?1?C e 80?10% (UR) e ambiente de laborat?rio. Os
ovos oriundos de f?meas de A. (P.) miniatus foram incubados nas condi??es descritas acima.
As larvas emergidas foram alimentadas em aves jovens, enquanto que os est?gios ninfais e
adultos foram alimentados em aves adultas. As caracter?sticas biol?gicas dos ?nstares ninfais
foram estudadas em per?odos de jejum de 15, 30 e 60 dias. Os aspectos biol?gicos dos
est?gios ninfais e adultos foram estudados em condi??o ambiente de laborat?rio nas esta??es
secas (Maio a Outubro) e chuvosas (Novembro a Abril). Foram avaliados: tempo de
alimenta??o, taxa de recupera??o, taxa de mortalidade, peso antes e ap?s a alimenta??o,
per?odos de muda, pr?-postura e postura, n?mero de posturas e de ovos, per?odo de incuba??o,
percentual de eclos?o, reprodu??o estimada e ?ndice nutricional. O peso m?dio das larvas foi
de 0,94 ? 0,13mg com ganho m?dio de peso de aproximadamente 81,37 vezes. Em c?mara
climatizada o per?odo m?dio de muda foi de 6,37?0,24 dias, enquanto que em condi??es de
ambiente de laborat?rio a m?dia foi 8,12?0,95 dias. Ao avaliar a capacidade de fixa??o de
larvas submetidas a diferentes per?odos de jejum observou-se que as larvas n?o alimentadas
mantidas em c?mara climatizada e em condi??es ambientais de laborat?rio foram capazes de
se fixar sobre as aves com per?odos de jejum de 6 a 75 dias e 8 a 60 dias, respectivamente.
Quando as ninfas foram submetidas a um per?odo de jejum de 15 e 30 dias, nas duas
condi??es estudadas, ocorreu o desenvolvimento de ninfas de segundo e terceiro instares.
Quando submetidas a 60 dias de jejum verificou-se mortalidade de 28 e 37% em c?mara
climatizada e em ambiente de laborat?rio, respectivamente e as sobreviventes n?o se fixaram
sobre os hospedeiros. As ninfas de segundo instar submetidas ao jejum de 60 dias
desenvolveram, em ambas condi??es estudadas, ninfas de terceiro instar e adultos machos.
Ainda no grupo submetido a 60 dias de jejum, as ninfas de terceiro instar desenvolveram
adultos (42,42% e 40,54% de machos; 36,36% e 48,65% f?meas nas condi??es de ambiente
de laborat?rio e B.O.D., respectivamente) e as demais se desenvolveram em ninfas de quarto
instar, que posteriormente, se desenvolveram em adultos f?meas. O n?mero m?dio de ovos
produzidos variou entre 46 e 138 ovos nas 18 posturas das f?meas mantidas em ambiente
controlado; 41 e 108 ovos nas 9 posturas das f?meas das esta??es chuvosas; e 74 e 138 ovos
para as f?meas da esta??o seca, com diferen?a significativa em todas as condi??es
experimentais. A dura??o m?dia do ciclo com ocorr?ncia de adultos em N2 foi de 49,05 dias
em c?mara climatizada, 53,01 dias nas esta??es secas e 67,41 dias nas esta??es chuvosas. Os
resultados obtidos no presente estudo demonstram que os aspectos biol?gicos de A. (P.)
miniatus s?o influenciados por fatores clim?ticos, de modo que ocorre um prolongamento do
ciclo biol?gico durante a esta??o seca, per?odo que a temperatura ? mais baixa.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:tede/771 |
| Date | 20 February 2009 |
| Creators | Santos, Huarrisson Azevedo |
| Contributors | Massard, Carlos Luiz, Faccini, Jo?o Luiz Horacio |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Curso de P?s-Gradua??o em Ci?ncias Veterin?rias, UFRRJ, Brasil, Parasitologia Veterin?ria |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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