Results 301 to 310 of about 41,694 (345)
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Catecholamines in social wasps
Comparative Biochemistry and Physiology Part A: Physiology, 1974Abstract 1. 1. Various tissues originating from several species of social wasps showed significant amounts of catecholamines (noradrenaline, adrenaline, dopamine and 5-hydroxytryptamine). 2. 2. Dopamine proved to be the most abundant among the catecholamines examined. 3. 3.
Jacob Ishay +3 more
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Emerging patterns in social wasp invasions
Current Opinion in Insect Science, 2021Invasive species are a main driver of biodiversity loss and ecological change globally. Consequently, there is a need to understand how invaders damage ecosystems and to develop effective management strategies. Social wasps (Hymenoptera: Vespidae) include some of the world's most ecologically damaging invasive insects.
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DISTANCES, ASSUMPTIONS AND SOCIAL WASPS
Cladistics, 1992The use of distance data in phylogenetic inference retains adherents in molecular systematics, despite the well-established cladistic critique of distances. Molecular distance matrices have been supposed to measure evolutionary divergence; how- ever, trees based upon analyses of such matrices are generally uninterpretable as doing so-under realistic ...
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TESTING SCENARIOS: WASP SOCIAL BEHAVIOR
Cladistics, 1989Abstract— A complex evolutionary model is tested with a cladistic approach. Cladograms constructed for all of the genera of social Vespidae are optimized for characters associated with social behavior. The character state assignments to the interior nodes are compared with the stages envisioned in the “polygynous family” hypothesis for the evolution of
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The thermogenic center in social wasps
Journal of Electron Microscopy, 2006In the social wasps Vespa orientalis and Paravespula germanica (Hymenoptera, Vespinae), a thermogenic center has been found in the dorsal part of the first thoracic segment. The temperature in this region of the prothorax is higher by 6-9 degrees C than that at the tip of the abdomen, and this in actively flying hornets outside the nest (workers, males
Jacob S, Ishay +5 more
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Nature, 1974
Wasps: An Account of the Biology and Natural History of Solitary and Social Wasps, with Particular Reference to Those of the British Isles. By J. P. Spradbery. Pp. xvi + 408 (28 plates). (Sidgwick and Jackson: London, September 1973; University of Washington: Seattle, November 1973.) £8.50; $17.50.
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Wasps: An Account of the Biology and Natural History of Solitary and Social Wasps, with Particular Reference to Those of the British Isles. By J. P. Spradbery. Pp. xvi + 408 (28 plates). (Sidgwick and Jackson: London, September 1973; University of Washington: Seattle, November 1973.) £8.50; $17.50.
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The Australian social wasps (Hymenoptera : Vespidae).
Australian Journal of Zoology, 1978The social wasps of Australia are described, together with a few from New Guinea which are allied to the Australian ones and contribute to the understanding of their taxonomic position. The larvae and the nesting habits of the wasps are described so far as they are known. Three genera occur in Australia.
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Social Wasp (Hymenoptera: Vespidae) Foraging Behavior
Annual Review of Entomology, 2000▪ Abstract Social wasps (Hymenoptera: Vespidae) forage for water, pulp, carbohydrates, and animal protein. When hunting, social wasps are opportunistic generalists and use a variety of mechanisms to locate and choose prey. Individual foragers are influenced by past foraging experience and by the presence of other foragers on resources.
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Social contracts in wasp societies
Nature, 1992THE stability of social groups requires that conflicts among group members somehow be resolved. Recent models predict that sub-ordinates may be allowed limited reproduction by dominant colony-mates as an inducement to stay and aid dominants1– For such 'social contracts' to be evolutionarily stable, attempted reproductive cheating by dominants must be ...
Hudson K. Reeve, Peter Nonacs
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Natural Thermoelectric Heat Pump in Social Wasps
Physical Review Letters, 2003Photographs of wasps or hornets, taken with different temperature sensitive infrared cameras, reveal body temperatures that are sometimes significantly lower than the ambient temperature. This suggests that the hornets possess an intrinsic biological heat pump mechanism which can be used to achieve such cooling.
Jacob S, Ishay +4 more
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