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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
The influence of selected environmental and behavioral factors on the degree of sociality in the family Herpestidae
 Poláková, Petra ; Landová, Eva (advisor) ; Mazoch, Vladimír (referee)
Sociality in mongooses (Heprestidae) is a frequently studied characteristic. It is not known which factors modulate the degree of sociality. There are hypotheses about influence of environmental factors (habitat openness, temperature, precipitation). In this thesis we tested the influence of these environmental factors, but we did not discover any relation. Yet we found a strong relation between versatility (ecological valence) and inhabited climate conditions. Sociality could be modified by reproductive parameters (adaptations in greater litter size, longer gestation period and longer lactation period). We discovered relations between sociality (number of individuals in a social group) and gestation period, sociality and lactation period and sociality and litter size. We used phylogenetical correlation and found that the relation between sociality and litter size is not significant. Greater litter size occurs in only one phylogenetical line; hence we consider greater litter size to be not a predisposition, but a result of transition to sociality. It is also not clear what is the ancestral state of sociality and used habitat on the base of the clade. Hypotheses say that the common ancestor of the mongooses was solitary and lived in a closed habitat, but based on our ancestral states reconstruction...
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The influence of selected environmental and behavioral factors on the degree of sociality in the family Herpestidae
 Poláková, Petra ; Landová, Eva (advisor) ; Mazoch, Vladimír (referee)
Sociality in mongooses (Heprestidae) is a frequently studied characteristic. It is not known which factors modulate the degree of sociality. There are hypotheses about influence of environmental factors (habitat openness, temperature, precipitation). In this thesis we tested the influence of these environmental factors, but we did not discover any relation. Yet we found a strong relation between versatility (ecological valence) and inhabited climate conditions. Sociality could be modified by reproductive parameters (adaptations in greater litter size, longer gestation period and longer lactation period). We discovered relations between sociality (number of individuals in a social group) and gestation period, sociality and lactation period and sociality and litter size. We used phylogenetical correlation and found that the relation between sociality and litter size is not significant. Greater litter size occurs in only one phylogenetical line; hence we consider greater litter size to be not a predisposition, but a result of transition to sociality. It is also not clear what is the ancestral state of sociality and used habitat on the base of the clade. Hypotheses say that the common ancestor of the mongooses was solitary and lived in a closed habitat, but based on our ancestral states reconstruction...
Detailed record

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