Two cooperatively social populations of the theridiid spider Anelosimus studiosus in a temperate region
Article Abstract:
Research was conducted to test whether Anelosimus studiosus have the traits that define a cooperatively social spider species. Web volume was determined in situ while the nests and support plant materials of the animals were collected for colony demographics. Results showed that inherited territories played a critical role in the persistence of groups. They also indicated that adult females did not discriminate their own eggs and offspring from those of other females under manipulated conditions.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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Division of labour can be morphological and/or temporal: a reply to Tsuji
Article Abstract:
Reversion of the Japanese queenless ant, Pristomyrnex pungens, to being a communal nester is unfounded. The Japanese queenless ant demonstrates the three characteristics of eusociality. Individuals exhibit indiscriminate caring of the young. There is also reproductve division of labor among reproductive and non-reproductive workers. The third evidence of eusociality where overlap of generations such that offspring can assist parents may be inferred.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1992
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Brood division in birds in relation to offspring size: sibling rivalry and parental control
Article Abstract:
Altricial birds share the care of their broods, but the size of the offspring may influence how the male and female apportion food. Many ideas have been proposed to account for such actions, with one explanation suggesting that differences are the result of sibling rivalry. A new study of the American robin examines the sibling rivalry hypothesis and concludes that, of the several hypotheses analysed, it is the best-supported.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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