Search results for "Hetaerina"

showing 3 items of 3 documents

Immunocompetence and resource holding potential in the damselfly, Calopteryx virgo L

2004

It is generally believed that resource holding potential reliably reflects male quality, but empirical evidence showing this is scarce. Here we show that the outcome of male-male competition may predict male immunocompetence in the territorial damselfly, Calopteryx virgo (Odonata: Calopterygidae). We staged contests between 27 pairs of males and found that winners of the contests showed higher immunocompetence, measured as encapsulation response, compared with that of losers. Furthermore, the winners had larger fat reserves. We also collected 29 males that had not been used in staged contests, and found that in these males encapsulation response correlated positively with an individual’s fa…

HetaerinaCalopteryx virgobiologyEcologyHemocytebiology.organism_classificationOdonatadamselfly; encapsulation rate; fat; hemocyte; immunocompetence; male-male competition; resource holding potentialCalopterygidaeDamselflyAnimal Science and ZoologyResource holding potentialImmunocompetenceEcology Evolution Behavior and SystematicsBehavioral Ecology
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Immunocompetence, developmental stability and wingspot size in the damselflyCalopteryx splendensL.

2000

Calopteryx splendens males exhibit a remarkable variation in wing pigmentation both within and between populations. In this study, we examined whether the wingspots of male C. splendens are related to male quality. We measured the nylon implant encapsulation rate for 85 males and found that males with larger wingspots had a faster encapsulation rate, indicating a better immunocompetence. We also found that the encapsulation rate was positively correlated with the density of haemocytes in the haemolymph. Another measurement of male quality, fluctuating asymmetry of wingspots, correlated negatively with the size of the wingspots. Males with asymmetrical wingspots also had lower encapsulation …

MaleHetaerinaInsectaanimal structuresGeneral Immunology and MicrobiologybiologyPigmentationEcologyGeneral Medicinebiology.organism_classificationModels BiologicalGeneral Biochemistry Genetics and Molecular BiologyFluctuating asymmetryAquatic organismsCalopterygidaeDamselflyAnimalsWings AnimalImmunocompetenceGeneral Agricultural and Biological SciencesImmunocompetenceResearch ArticleGeneral Environmental ScienceProceedings of the Royal Society of London. Series B: Biological Sciences
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Interspecific aggression and character displacement in the damselfly Calopteryx splendens

2004

Problems in species recognition are thought to affect the evolution of secondary sexual characters mainly through avoidance of maladaptive hybridization. Another, but much less studied avenue for the evolution of sexual characters due to species recognition problems is through interspecific aggression. In the damselfly, Calopteryx splendens, males have pigmented wing spots as a sexual character. Large-spotted males resemble males of another species, Calopteryx virgo, causing potential problems in species recognition. In this study, we investigate whether there is character displacement in wing spot size and whether interspecific aggression could cause this pattern. We found first that wing …

SympatryInsectaPopulation DynamicsZoologyOdonataDamselflyCalopterygidaeSpecies SpecificityCharacter displacementmedicineAnimalsWings AnimalSelection GeneticFinlandEcology Evolution Behavior and SystematicsHetaerinaSex CharacteristicsbiologyPigmentationEcologyAggressionInterspecific competitionbiology.organism_classificationBiological EvolutionAggressionmedicine.symptomTerritorialityJournal of Evolutionary Biology
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