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Sexual selection: lessons from hermaphrodite mating systems.
  • J. Leonard
  • Biology, Medicine
  • Integrative and comparative biology
  • 10 May 2006
Over the last 130 years, research has established that (a) sexual selection exists and is widespread in the plant and animal kingdoms; (b) it does not necessarily entail sexual dimorphism; evenExpand
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Male-Female Conflict in a Simultaneous Hermaphrodite Resolved by Sperm Trading
On decrit le mode de copulation de Navanax inermis gastropode marin hermaphrodite et on le compare au systeme copulateur du poisson Hypoplectrus
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Bateman's Principle and Simultaneous Hermaphrodites: A Paradox1
  • J. Leonard
  • Medicine, Biology
  • Integrative and comparative biology
  • 1 November 2005
Abstract Bateman's principle states that reproductive success is limited a) in females by the resources available for egg production; and b) in males, only by access to females and/or eggs. TheExpand
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Courtship, copulation, and sperm trading in the sea slug, Navanax inermis (Opisthobranchia: Cephalaspidea)
Navanax inermis are internally fertilizing, simultaneous hermaphrodites that normally mate in pairs. Copulations usually occur in bouts with active alternation of sexual roles and function. Over theExpand
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Sex and the simultaneous hermaphrodite: testing models of male-female conflict in a sea slug, Navanax intermis (Opisthobranchia)
Abstract navanax inermis is a simultaneously hermaphroditic sea slug with unilateral copulation. Individuals alternate sexual roles over a series of copulations within a period of hours. LaboratoryExpand
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Sexual conflict in simultaneous hermaphrodites: evidence from serranid fishes
  • J. Leonard
  • Biology
  • Environmental Biology of Fishes
  • 1 February 1993
SynopsisMuch of modern mating systems theory is founded on the assumption that a conflict of interests between males and females acts to shape reproductive strategies. If sexual conflict exists itExpand
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Comparative reproductive biology of Ariolimax californicus and A. dolichophallus (Gastropoda; Stylommiatophora)
Summary Traits which differ among species in a genus are considered to be the product of relatively rapid evolution. Laboratory studies indicate that copulation differs between two species of theExpand
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Phally polymorphism and reproductive biology in Ariolimax (Ariolimax) buttoni (Pilsbry and Vanatta, 1896) (Stylommatophora: Arionidae)*
Phally polymorphism, whereby some individuals in a hermaphroditic species have a complete functional penis (euphally), whereas others lack a penis (aphally) or have a reduced, non-functional penisExpand
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Familial heart block and sinus bradycardia. Classification and natural history.
Abstract Study of 1 family and review of 18 revealed a spectrum of inherited bradycardia from pure familial heart block (10 families), through combined familial heart block and sinus bradycardia (6Expand
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