Showing papers in "Animal Behaviour in 1982"

TL;DR: Re-examining hypotheses that might explain the evolved tendency for juvenile male dispersal in many mammal species is attempted by comparing dispersal patterns in many species of mammals.

TL;DR: Male and female zebra finches are affected by the colour of plastic leg bands worn by opposite-sex conspecifics, and find certain colours more attractive, and others less attractive, than the natural unbanded condition.

TL;DR: Evidence is presented to suggest that the ducks initially use the frequency of supply of food items at a patch to assess its profitability, but they can, over a longer time scale, use other cues.

TL;DR: This paper found that free-ranging vervet monkeys grunt to each other in a variety of social situations: when approaching a dominant or subordinate individual, when moving into a new area of their range, or when observing another group.

TL;DR: It is determined that the defensive responses used by two agamid lizards, Agama savignyi and A. pallida, change as a function of body temperature.

TL;DR: Five hypotheses of cache recovery behaviour in Clark's nutcracker (Nucifraga columbiana) were examined experimentally and it was found that seed-caching nutcrackers relocated caches using large objects as remembered visual cues.

TL;DR: These newly-discovered song cycles produce significant mating enhancement in D. melanogaster and D. simulans, with the females showing a preference for songs which carry both the species-specific IPI and the Species- specific IPI rhythm.

TL;DR: Results of the principal components analyses indicate that the sounds can be divided into three major classes: blow sounds, slaps, and calls; and that the repertoire of calls is a continuum with certain types more common than others.

TL;DR: For example, Hazlett et al. as discussed by the authors found that crabs behaved as if they expected a certain kind of shell to be available, thus the visually mediated orientation. But the crabs could not discriminate between the shell species.

TL;DR: Observations of wintering house sparrows feeding at feeders placed at different distances from a brushpile and in positions differentially exposed to the wind supported the hypothesis that where food patches are equal in net energy return, foragers use the one furnishing the most protection from predation.

TL;DR: The functional significance of the familiarity and kinship effects found is discussed, including differences between the sexes in the types of interaction showing kinships effects, and differences between adult and juvenile mice are briefly discussed.

TL;DR: Much of this suggests that parental care patterns vary within species and may often be adjusted by individuals according to prevailing and projected conditions.

TL;DR: It is suggested that males, by being polyterritorial, deceive females into accepting polygyny; and females can be deceived since they do not have time to find out the marital status of males.

TL;DR: This paper found that the birds matched their own songs most often and those of strangers least when the stimulus song was very similar in detailed structure to their own rendition of the song and this was confirmed in a second experiment in which they played ‘similar’ and ‘different’ renditions recorded from strangers.

TL;DR: The social interactions within groups of Norway rats (Rattus norvegicus) had a strong impact on the individual pattern of copulation which, in turn, affects sperm precedence and the probability of implantation in this species.

TL;DR: Ontogenetic differences in constancy of daytime school locales and migration routes may result from learning, facilitated perhaps by greater overlap of age cohorts in large juveniles, plus stabilizing selection due to greater predation on smaller, behaviourally variable fish.

TL;DR: Uca pugilator, the sand fiddler crab, constructs two kinds of burrows in protected, sandy upper-intertidal and supratidal substrates on the west coast of Florida as discussed by the authors.

TL;DR: Cows showed a marked decrease in calf-directed activities with time after parturition, more pronounced in older animals, which recommenced ingestive behaviour sooner and Primiparous dams showed a higher incidence of abnormal maternal behaviour.

TL;DR: Behavioural evidence that a salamander can evict intruders from a defended area and thus support the hypothesis of territoriality among terrestrial salamanders is provided.

TL;DR: Female katydids receive a large spermatophore at mating which they subsequently eat, and when given the choice between two singing males of different weights, females always mated with the larger individual.

TL;DR: Tadpoles preferentially formed schools with familiar siblings over both familiar and unfamiliar non-siblings, suggesting that sibling discrimination is not based on familiarity alone.

TL;DR: Both the degree of boldness shown towards a pike and the level of aggression shown towards conspecifics varied significantly between sites; sticklebacks coexisting with abundant predators showed the lowest level of both these responses, but this was less clear-cut in the case of intraspecific aggression.

TL;DR: Past association with the mother appears to be the single most important factor mediating male discrimination of young, and prior contact with a specific female's urine reduced a male's propensity for subsequently killing her young.

TL;DR: The foraging ecology of the swallow was investigated in the field and compared with predictions of optimal foraging theory, and it is shown that it is profitable in terms of net energy gain for the swallow to take a mixture of large and small items, whereas optimalForaging theory would predict exclusive specialization on large, high-ranking items.

TL;DR: Overall, house martins were the most sensitive to travel time effects, but in a quantitative test the predicted load size was 20–40% less than the observed size for a range of realistic travel times.

TL;DR: Song-rates were significantly correlated with later participation in parental care, measured as the share taken, relative to their mate's share, in feeding nestlings, and defending them from predators by warning and distraction displays.

TL;DR: There is evidence that the process of pair formation starts within minutes of the introduction of unfamiliar zebra finches, and some females solicited their mates, during the first recording session of this study.

TL;DR: Results of the first series do not differ significantly from previously reported preferences of dark-eyed juncos, birds weighing 10 g less than the white-crowned sparrows, and a design intended to resemble dietary selection is examined.

TL;DR: The results suggest that the infant's social network mirrors that of its mother both in the first weeks of life and as late as 30 weeks of age, and it is suggested that the ontogeny of early social relationships resembles a process of differentiation.

TL;DR: Results are consistent with both a phenotypic matching and a genetic recognition system of kin recognition, and suggest that both learned and innate components may play a role in R. cascadae sibling recognition.