Results 181 to 190 of about 316,826 (222)
Some of the next articles are maybe not open access.
Orphaning does not affect the colony productivity of the primitive eusocial wasp Polistes snelleni
Insectes Sociaux, 2014In 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
openaire +1 more source
Journal of Insect Physiology, 2010
Differentiation of neotenics is easily induced by orphaning the worker termites of Reticulitermes speratus (Kolbe). Although it has previously been reported that the sex ratio of neotenics is female-biased, the background of this phenomenon and the gonad developmental process of workers in artificially orphaned colonies are unknown.
Hirofumi Watanabe
exaly +3 more sources
Differentiation of neotenics is easily induced by orphaning the worker termites of Reticulitermes speratus (Kolbe). Although it has previously been reported that the sex ratio of neotenics is female-biased, the background of this phenomenon and the gonad developmental process of workers in artificially orphaned colonies are unknown.
Hirofumi Watanabe
exaly +3 more sources
Insectes Sociaux, 1993
Colonies ofCoptotermes lacteus (Froggatt) from a site in coastal south-eastern Australia were experimentally orphaned in early 1989. Sample colonies were examined 3, 6, 12, 18, 24 or 30 months later for their caste composition, the presence of replacement reproductives and brood. All replacement reproductives were nymphoid neotenics.
M. Lenz, S. Runko
openaire +1 more source
Colonies ofCoptotermes lacteus (Froggatt) from a site in coastal south-eastern Australia were experimentally orphaned in early 1989. Sample colonies were examined 3, 6, 12, 18, 24 or 30 months later for their caste composition, the presence of replacement reproductives and brood. All replacement reproductives were nymphoid neotenics.
M. Lenz, S. Runko
openaire +1 more source
Molecular Ecology, 2011
AbstractIn genetically diverse insect societies (polygynous or polyandrous queens), the production of new queens can set the ground for competition among lineages. This competition can be very intense when workers can reproduce using thelytoky as worker lineages that manage to produce new queens gain a huge benefit.
Chéron, Blandine +3 more
openaire +4 more sources
AbstractIn genetically diverse insect societies (polygynous or polyandrous queens), the production of new queens can set the ground for competition among lineages. This competition can be very intense when workers can reproduce using thelytoky as worker lineages that manage to produce new queens gain a huge benefit.
Chéron, Blandine +3 more
openaire +4 more sources
Ethology Ecology & Evolution, 2001
We compared alate production and the behaviour of workers and queens among polygynous, monogynous and orphan colonies of Myrmica kotokui, a member of the M. rubra complex. The level of inactivity of workers and queens was lower in polygynous colonies than in monogynous colonies. However, alate production per worker was not higher in polygynous colonies,
T. Kikuchi, S. Higashi
openaire +1 more source
We compared alate production and the behaviour of workers and queens among polygynous, monogynous and orphan colonies of Myrmica kotokui, a member of the M. rubra complex. The level of inactivity of workers and queens was lower in polygynous colonies than in monogynous colonies. However, alate production per worker was not higher in polygynous colonies,
T. Kikuchi, S. Higashi
openaire +1 more source
Insectes Sociaux, 2009
The truce between honey bee (Apis spp.) workers over reproduction is broken in the absence of their queen. Queenright workers generally abstain from personal reproduction, raising only the queen’s offspring. Queenless workers activate their ovaries, produce eggs, and reduce the rate at which they destroy worker-laid eggs, so that some eggs are reared ...
N. C. Chapman +4 more
openaire +1 more source
The truce between honey bee (Apis spp.) workers over reproduction is broken in the absence of their queen. Queenright workers generally abstain from personal reproduction, raising only the queen’s offspring. Queenless workers activate their ovaries, produce eggs, and reduce the rate at which they destroy worker-laid eggs, so that some eggs are reared ...
N. C. Chapman +4 more
openaire +1 more source
Fostering procedures for orphaned infants in a breeding colony of African green monkeys.
Contemporary topics in laboratory animal science, 2004We developed procedures to foster orphaned African green monkey infants to females with natural infants of a similar age to the foster infant (< 1 month). Our purpose was to assess the feasibility of fostering additional infants to females with natural infants.
M Babette, Fontenot +2 more
openaire +1 more source
Journal of Ethology, 1991
Worker reproduction and related behavior in 2 orphan colonies ofPolistes jadwigae, one of which had been maintained by a queen and 5 artificially introduced alien workers, were observed. After the queen loss, a dominance hierarchy was established among workers, and several workers laid eggs without physical interference from other workers.
openaire +1 more source
Worker reproduction and related behavior in 2 orphan colonies ofPolistes jadwigae, one of which had been maintained by a queen and 5 artificially introduced alien workers, were observed. After the queen loss, a dominance hierarchy was established among workers, and several workers laid eggs without physical interference from other workers.
openaire +1 more source
‘Orphan’ as a category of analysis: Historicizing ‘child rescue’ in colonial India, 1860s–1920s
ChildhoodThis article makes a case for using “orphan” as an analytical category in historicizing child rescue in nineteenth and early-twentieth centuries colonial India. It argues that child rescue efforts in the 19th century were tied to the concept of jati, and were therefore largely communitarian in nature.
openaire +1 more source