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Factors affecting hatching rate of eggs of ladybirds
 MAŠÍN, Vladislav
Hatching rate of eggs of ladybirds (Coleoptera: Coccinellidae) is affected by biotic and abiotic factors. Parental age, multiple matings, presence of male-killing agents, quantity and quality of food are the biotic factors. Temperature and wavelengths of light are the abiotic factors up to now tested. We reviewed these above mentioned factors that authors of diverse studies measured,and in addition, we retrieved data on fecundity and its relation to hatching rate. In 7 cases, hatching rate was significantly positively correlated to fecundity, in another 5 cases, there was no clear relationship. We argue that in unsuitable conditions visualized by low fecundity, female ladybirds lay higher proportion of infertile eggs as so called trophic eggs for feeding the neonate larvae.
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2 Mašín, Vladimír
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