Academic literature on the topic 'Canthon cyanellus – Reproduction'

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Journal articles on the topic "Canthon cyanellus – Reproduction"

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Favila, Mario, and Ivette Chamorro-Florescano. "The reproductive status of both sexes affects the frequency of mating and the reproductive success of males in the ball roller beetle Canthon cyanellus cyanellus (Coleoptera: Scarabaeidae)." Behaviour 146, no. 11 (2009): 1499–512. http://dx.doi.org/10.1163/156853909x445560.

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AbstractSeveral studies have shown that males assess female reproductive status and use different mechanisms to increase their reproductive success. However, a male's reproductive status can also affect its own reproductive success. In Canthon cyanellus cyanellus, a male–female pair makes several brood balls during nesting and both care for the brood balls. However, in females that are transported to the nest by males, the spermatheca is often already filled with viable sperm from other males, such that sperm competition is strong. We analyze the effect of the reproductive status of males and females on the frequency of mating during brood ball construction, as well as the reproductive success of males that nest with previously mated females. Virgin and previously mated males copulated with the same frequency before the construction of each brood ball when they nested with virgin females. However, when both types of males nested with previously mated females, the frequency of mating increased before the construction of the first brood ball. The paternity of previously mated males was significantly higher (82%) than that of virgin males (62%). Therefore, the reproductive status of both sexes of C. c. cyanellus affects the frequency of mating and the reproductive success of males.
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Favila, Mario, and Ivette Chamorro-Florescano. "Male reproductive status affects contest outcome during nidification in Canthon cyanellus cyanellus LeConte (Coleoptera: Scarabaeidae)." Behaviour 145, no. 12 (2008): 1811–21. http://dx.doi.org/10.1163/156853908786279637.

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Nolasco-Soto, Janet, Mario E. Favila, Alejandro Espinosa De Los Monteros, Jorge González-Astorga, Gonzalo Halffter, Jorge Valdez-Carrasco, Jorge Ari Noriega, and Eduardo Galante. "Variations in genetic structure and male genitalia suggest recent lineage diversification in the Neotropical dung beetle complex Canthon cyanellus (Scarabaeidae: Scarabaeinae)." Biological Journal of the Linnean Society 131, no. 3 (September 9, 2020): 505–20. http://dx.doi.org/10.1093/biolinnean/blaa131.

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Abstract We analysed the genetic divergence and morphology of the aedeagus (i.e. phallobase and parameres) in Canthon cyanellus at different geographical levels. The results from both approaches were compared with the current taxonomic assignment of the C. cyanellus complex, which includes three subspecies. We found a high variation in all the morphological characters of the aedeagus in the populations analysed; the morphometric variation was not geographically structured, either by population or by region. The genealogical analysis indicates a significant genetic structure that does not match either the morphological variation in the male genitalia or the previous subspecific taxonomic classification. Our results suggest that the morphological variation of the aedeagus is seemingly not an isolating reproductive barrier and that the intra- and interpopulation morphological variability of the aedeagus in the C. cyanellus complex does not permit the division into several species. We suggest that other evolutionary forces, such as genetic drift and sexual selection, have influenced the evolution of the male genitalia and the incipient differentiation of this species complex.
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Salomão, Renato Portela, Lucrecia Arellano, Carmen Huerta, and Jorge Leonel León-Cortés. "Do sexual gonadic maturity and age determine habitat occupancy of Canthon cyanellus LeConte, 1859 (Coleoptera: Scarabaeidae)?" Canadian Entomologist, April 14, 2021, 1–16. http://dx.doi.org/10.4039/tce.2021.9.

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Abstract High-quality habitats presumably have the resources required to sustain relatively high rates of survival and reproduction. We assessed how habitat type and local environmental conditions determine the distribution of individuals of Canthon cyanellus (Coleoptera: Scarabaeidae), an eurytopic dung beetle, according to age category and sexual gonadic maturity. Beetles were surveyed in forest fragments, live fences, and pastures in Mexico. Individuals were categorised into six age categories according to the glandular volumes in males and oocyte number and length in females. Mature females in forest fragments were the most abundant females found among the habitats. Air humidity and soil hardness were positively and negatively related to mature female abundance, respectively. Mature beetles were the most abundant among males, and higher abundance of males occurred in forest fragments than in live fences and pastures. Light quantity was negatively related to the abundance of young males. Compared to forest fragments, females in pastures had larger oocytes. However, sites with higher soil hardness and air humidity had females with lower numbers of oocytes. Our results demonstrate that, although C. cyanellus occurs across a wide range of habitats, forest habitats might host sexually mature individuals, which translates into more effective individual dispersion and potential reproduction.
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Ortiz Domínguez, Maribel, and Mario E. Favila. "Evaluation of the Infestation Rate of Blaesoxipha alcedo in the Carrion Roller Scarab Canthon cyanellus cyanellus and Its Effect on Reproductive Behavior." Journal of Insect Science 14, no. 1 (January 1, 2014). http://dx.doi.org/10.1093/jisesa/ieu002.

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Dissertations / Theses on the topic "Canthon cyanellus – Reproduction"

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Martínez, Morales Imelda. "Activité reproductrice et ses contrôles chez le mâle et la femelle de Canthon indigaceus chevrolati et C. Cyanellus cyanellus (Coléoptères, Scarabaeinae)." Paris 6, 1991. http://www.theses.fr/1991PA066232.

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L'activité reproductrice a été etudiée chez les mâles et les femelles de deux espèces de Canthon à comportements nidificateurs différentes, C. Indigaceus chevrolati et C. Cyanellus cyanellus, pendant la prénidification, la nidification et la postnidification. Pour chacune des périodes comportementales nous avons établi les caractéristiques physiologiques des gonades, des glandes annexes mâles, des centres neuroendocrines et endocrines. Chez les deux espèces, la prénidification est caractérisée par un accroissement progressif de l'activité des cellules de la pars intercerebralis et des corpora allata, par la maturation des gonades et par l'apparition des sécrétions des glandes annexes mâles. Pendant la nidification, l'activité reproductrice des deux sexes diffère selon l'espèce. Chez C. I. Chevrolati, elle est continue, avec maintien de l'état physiologique atteint a la fin de la prénidification. Chez C. C. Cyanellus, elle est cyclique: pendant les soins du nid assurés par le couple, il y a arrêt de l'activité neuroendocrine et endocrine, de celle des glandes annexes et des gonades, avec dégénerescences ovariennes et testiculaires. La postnidification est caracterisée par l'arrêt définitif des activités neuroendocrines et endocrines, des gonades et des glandes annexes. Nous avons montré certains des contrôles de la reproduction de Canthon. Celle-ci dépend des facteurs environnementaux liés à la saison des pluies. Elle est contrôlée par les neurosécrétions des cellules a de la pars intercerebralis et par les hormones juvéniles des corpora allata. Nous avons mis en évidence la nécessité d'un premier accouplement pendant la prénidification pour l'achèvement de la maturation ovarienne
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