Results 131 to 140 of about 553 (184)

Sex ratios in bumble bee colonies: Complications due to orphaning?

Behavioral Ecology and Sociobiology, 1980
Highly male-biased investment ratios (1:2.86, F:M, biomass wet weight) were found among reproductives reared by 32 Bombus terricola colonies set out in the field and 35 B. melanopygus colonies held in laboratory confinement. The numerical sex ratios were almost identical for the two species (1 queen to 6.1 males).
Robin E. Owen, F. H. Rodd, R. C. Plowright   +2 more
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Algerian Orphans and Colonial Christianity in Algeria, 1866-1939

French History, 2006
This article considers the exceptional fate of the orphan survivors of the great Algerian demographic crisis of the late 1860s who subsequently converted to Catholicism. Using a prosopographical approach, this study seeks to highlight the complexities of national identity in France and to explore some of the racial tensions emerging in Algeria in the ...
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Hierarchy length in orphaned colonies of the ant Temnothorax nylanderi

Naturwissenschaften, 2008
Workers of the ant Temnothorax nylanderi form dominance orders in orphaned colonies in which only one or a few top-ranking workers begin to produce males from unfertilized eggs. Between one and 11 individuals initiated 80% of all aggression in 14 queenless colonies.
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Reproductive hierarchies and status discrimination in orphaned colonies of Pachycondyla apicalis ants

Animal Behaviour, 2010
In group-living animals where dominance hierarchies occur, aggression can be reduced if individuals are able to recognize each other. To do this, and to adapt their behaviour suitably when faced with a rival, individuals may rely on two nonmutually exclusive recognition means: they could recognize group members individually and/or their social status ...
Pierre Blacher, Emmanuel Lecoutey, Dominique Fresneau, Elise Nowbahari   +3 more
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The Limits of the Human? Exhibiting Colonial Orphans in Victorian Culture

2020
On the 24th of June, 1848, the Examiner covered an exhibition in Egyptian Hall: one of many which exhibited indigenous peoples from around the world. It had at its centre two Bushman orphans, a fifteen year old boy and an eight year old girl described as: ‘pathetic elf-like creatures with triangular-shaped faces and slant eyes that gave them a foxy ...
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Family Policy and Orphan Schools in Early Colonial Australia

Journal of Interdisciplinary History, 1991
Family Policy and Orphan Schools in Early Colonial Australia Australia is renowned for its "convict heritage." Although that heritage is frequently celebrated as a colorful part of the national character, it provided a strange crucible in which social practices and structures were formulated.
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Absconding and colony mergers of orphaned Cape honey bees (Apis mellifera capensis)

Journal of Apicultural Research, 2011
(2011). Absconding and colony mergers of orphaned Cape honey bees (Apis mellifera capensis) Journal of Apicultural Research: Vol. 50, No. 2, pp. 165-166.
Neumann, Peter, Hepburn, H. R.
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Origin of male-biased sex allocation in orphaned colonies of the termite, Coptotermes lacteus

Behavioral Ecology and Sociobiology, 2002
In eusocial insects, sex allocation often constitutes a ground for intracolonial conflicts. This occurrence provides ideal opportunities to test kin-selection theory. A vast literature on this topic is available for social Hymenoptera, but the same field remains almost untouched in termites.
Roisin, Yves, Lenz, Michael
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Orphaning does not affect the colony productivity of the primitive eusocial wasp Polistes snelleni

Insectes Sociaux, 2014
In colonies of primitively eusocial wasps, some dominant workers become successive queens and inherit queenship after the death of the foundress queens. Although workers in many species do not mate, workers of Polistes snelleni are capable of mating and female production. In this study, we removed foundress queens from colonies of P.
K. Yamasaki, K. Tsuchida
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Orphan outpost: Cape Breton colony, 1784--1820

2012
Abstract not available.
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