Color polymorphism in Chauliognathus flavipes Fabricius (Coleoptera, Cantharidae): II. Patterns of emergence of morphs and mating system

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Abstract

This study presents data on the color polymorphism in Chauliognathus flavipes Fabricius 1781 (Coleoptera, Cantharidae), analysing the variations in the emergence pattern of phenotypic classes for elytra color and mating system. The frequency of the phenotypic classes varies significantly throughout the season (males:X² = 59,705; females: X² = 61,017; 10 gl; p<0.001) being similar in males and females. The frequency of classes does not differ significantly among the insects that were copulating and those that were not copulating at the time of collection, i.e., the matings are random for elytra color patterns. The variations observed in frequency of phenotypic classes are not influenced by factors associated with sex. Furthermore, the elytra color patterns probably do not influence the individuals' ability to copulate.

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Most cited references 16

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Sex differences in movement between natural feeding and mating sites and tradeoffs between food consumption, mating success and predator evasion in Mediterranean fruit flies (Diptera: Tephritidae)

B Katsoyannos, D R Papaj, J Hendrichs … (1991)

Systematic quantitative observations of the location and diel pattern of adult Mediterranean fruit fly, Ceratitis capitata (Wiedemann), activities were carried out in an orange grove and surroundings on the island of Chios in Greece. Natural fly foods were assessed for their contribution to fly longevity, fecundity and fertility. There were diel shifts in male and female location. Females required a substantial and varied diet to realize peak fecundity. This diet was acquired away from the primary host, orange. Foraging for food throughout most of the day on fig and non-host foliage (including feeding on bird droppings) as well as on fig fruit and grapes, females dispersed and fed more than males. A diet of grapes alone did not support any fecundity, contributing only to longevity. A diet of figs alone, on the other hand, sustained both longevity and egg production. Bird feces alone supported neither egg production nor longevity. However, when added to a diet of figs, bird feces significantly increased fly fecundity. Throughout most of the day, males aggregated in leks within the inner canopy of the primary host, orange. The arrival here during the warmest hours of the day of receptive females, followed by pair formation, reinforced the lek mating system on host foliage. In the afternoon, females shifted to orange fruit where they suffered from high predation mortality while ovipositing. Soon after, males also shifted to orange fruit, where they attempted matings with non-receptive ovipositing females. Male feeding on fig fruit occurred late in the day, a time when they were least likely to find a mate. Male survival did not differ between the natural diets. Tradeoffs between food consumption, mating success and predator evasion are discussed for each sex and related to fruit fly mating systems.

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Female Choice and the Mating Structure of a Natural Population of the Soldier Beetle, Chauliognathus pennsylvanicus

Michael J. Wade, David McCauley (1978)

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Density Dependent Sexual Selection and Positive Phenotypic Assortative Mating in Natural Populations of the Soldier Beetle, Chauliognathus pennsylvanicus

Denson Kelly McLain (1982)

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Author and article information

Journal

Journal ID (publisher-id): rbzool

Title: Revista Brasileira de Zoologia

Abbreviated Title: Rev. Bras. Zool.

Publisher: Sociedade Brasileira de Zoologia (Curitiba, PR, Brazil )

ISSN (Print): 0101-8175

Publication date (Print and electronic): June 1999

Volume: 16

Issue: 2

Pages: 441-446

Affiliations

[02] Porto Alegre Rio Grande do Sul orgnameUniversidade Federal do Rio Grande do Sul orgdiv1Departamento de Genética Brasil ama@ 123456if.ufrgs.br

[01] São Leopoldo Rio Grande do Sul orgnameUniversidade do Vale do Rio dos Sinos orgdiv1Centro de Ciências da Saúde orgdiv2Laboratório de Genética Brasil machado@ 123456cirrus.unisinos.tche.br