<b>Ecologia de carrapatos VII — a escassa influência da luz do dia sobre oviposição e embriogênese de Boophilusmicroplus (Canestrini); equivalência de contagens de larvas e de cascas d'ovos</b>

Abstract

No significant difference was found for egg laying and egg embryonation from engorged female Boophilus microplus exposed to different intensities of diffuse daylight as filtered through "colorless" or amber-colored glasses. The countings of free larvae and of egg-shells were almost perfectly equivalent. Almost perfect correlation was also found between the weights of engorged females and either the number of eggs they produced, the number of hatched larvae and the resulting number of empty shells. The average egg number per miligram of engorged female ticks was 10 and this proportion did not differ for the smaller or the larger of the studied females. The proportion of shrivelled eggs, which is an index of dehydration, was higher for the smaller egg-masses as compared with the larger egg clumps and this seems to be a most plausible reason for the higher proportion of hatching in the larger masses of eggs.