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The role of olfactory cues, social behavior, and duration of recall in the recognition of familiar conspecifics was investigated in collared lemmings (Dicrostonyx groenlandicus).
Familiarity was established by housing a male and female together for 30 days. After a separation of 1,...
Polymorphism at an enzyme locus encoding for malate dehydrogenase was studied in 92 nests of the ant Formica sanguinea, mainly in Finland. Four alleles segregated at the locus. In seven nests all workers were homozygous for a single allele. In all other nests heterozygotes were observed....
Several probability models are used to examine the hypothesis that mud-nesting Hymenoptera include empty, yet sealed, cells in their nests to reduce the success of parasites that break into the nest after its completion and destroy the immature host therein. We examine optimal empty cell...
The dolichoderine ant Conomyrma bicolor interferes with the activity of other desert ants when their nest entrances are in close proximity. C. bicolor workers surround these nests, pick up small stones and other objects with their mandibles, and drop them down the nest entrances.
Defense of an area has often been suggested to be more likely when the area contains critical resources which are available more continously, more reliably, or in greater concentration. We report a case in which field experiments and observations of two closely related primate species do not...
The predictions of game theory concerning the use of resource assessment strategies by animals in conflict situations were tested through study of the agonistic behavior of the funnel-web spider, Ageleropsis aperta, in disputes over web sites and associated territories. Specifically,...
We studied the social and mating behavior of Myotis lucifugus at two hibernacula (Renfrew Mine and Tyendinaga Cave) in Ontario during the swarming and hibernation periods of 1976 and 1977.
During July the population of bats arriving at the hibernacula consisted of adult males and...
As part of an overall study of the social behavior of the little brown bat, Myotis lucifugus, we compiled the vocal repertoire of this gregarious species in its natural habitat. Ten vocalizations were identified and associated with certain behavioral contexts.
The postcopulatory behavior of the damselfly Calopteryx maculata (De Beauvois) (Odonata: Calopterygidae) was studied in field populations to determine the adaptive significance of guarding of ovipositing females by males. Of particular interest was an explanation for the guarding of...
Under laboratory conditions echolocation sounds were recorded from four Megaderma lyra catching a mouse in complete darkness from an experimental table. Flight paths and sequences of sound emission were synchronously recorded by stroboscopic photography and high-speed tape-recording (Figs....
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