Search results for "Female gonad"

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Pigmentation polymorphism in the invasive amphipod Dikerogammarus villosus : some insights into its maintenance

2004

Dikerogammarus villosus, a freshwater invasive amphipod, exhibits conspicuous pigmentation polymorphism. This polymorphism is documented in two recently colonized areas, the Saand Moselle rivers (north-eastern France), and some of the mechanisms by which pigmentation polymorphism can arise and be maintained are addressed. Body size, reproductive status, fecundity and mate choice are compared among morphs of D. villosus in field samples collected in summer 2001. Body size and female gonad developmental stage were comparable among the different morphs, suggesting that polymorphism is not the result of changes in pigmentation with age or moult- cycle. Fecundity and reproductive status (paired …

0106 biological sciencesDevelopmental stagegenetic structuresbiologyEcology[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE]010604 marine biology & hydrobiologyfungiZoologyRandom combinationDikerogammarus villosusBody sizeFecunditybiology.organism_classification010603 evolutionary biology01 natural sciencesMate choiceAnimal Science and ZoologyMoultingFemale gonadComputingMilieux_MISCELLANEOUSEcology Evolution Behavior and SystematicsJournal of Zoology

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