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Showing 1 to 8 of 8 for “"Pogonomyrmex"”.
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Evolution of colony characteristics in the harvester ant genus Pogonomyrmex
Die Gattung Pogonomyrmex ist besonders gut geeignet, um die Evolution der Charakteristika von Ameisenkolonien allgemein zu untersuchen, und insbesondere deren soziogenetische Struktur, da die Biologie für einige ihrer Arten sehr gut bekannt ist, und eine Diversität an Paarungshäufigkeiten und …
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Daily Nest Opening and Closing of the Ant Pogonomyrmex Californicus
<p>In a study of timing in this ant ten of the twelve nests which were observed opened synchronously in the morning and closed in the evening. However, one was never seen to close and another closed during the day and stayed open at night.</p> <p>A seasonal progression was shown by later opening …
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Ecology and Evolution of Caste and Polymorphism in Pogonomyrmex Seed Harvester Ants
In conclusion, the many independent origins of caste in the social insects likely resulted from variation in the proximate factors that can yield phenotypic differences (e.g., larval diet, genetic variation, social regulation) and variation in the selective pressures favoring caste differentiation …
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Field Behavior Comparison of 8 Species of California Desert Ants
… outside the nest ranged from strictly diurnal in Pogonomyrmex californicus to bimodal to nocturnal in Pheidole barbata. Four aspects of surface activity, foraging, nest work, patrolling, and convening, also differed among species in hour and/or in relative proportion of such activity. Finally, …
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Comparison of Laboratory Rhythms in Several Species and Genera of Ants
… have been made at the genus level. Four genera (Pogonomyrmex, Veromessor, Formica, Myrmecocystus) of ants were compared, two of them represented by two species each. Under controlled temperatures, in alternating light and dark, there was more difference in phase of rhythm among than within …
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Simulating the evolution of recruitment behavior in foraging Ants
… behavior of harvester ants of the genus Pogonomyrmex. We optimized the behavior of these models using genetic algorithms over a variety of food distributions and colony sizes, and validated their behavior by comparison with data collected on harvester ants foraging for seeds in the field. …
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Assessing the Effects of Biotic and Abiotic Factors on Ephedra viridis Seed Size
… seed preferences of harvester ants (Pogonomyrmex occidentalis) across varying microhabitat regimes, 2) Intraspecific plant response through seed size evolution to recent climate trends, and 3) Neighboring shrub influence on seed size across environmental gradients.The primary findings …
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Host and Seasonal Effects on the Infection Dynamics of Skrjabinoptera Phrynosoma (Ortlepp) Schulz, 1927, a Parasitic Nematode of Horned Lizards
… characteristics (sex and SVL) were analyzed. Pogonomyrmex spp. harvester ants were collected and dissected to determine the prevalence of infection in this intermediate host. The number of non-gravid female nematodes as well as the number of juvenile nematodes in lizards' stomachs decreased …