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EXPERIMENTAL HYBRIDIZATIONS BETWEEN POPULATIONS OF CAVERNICOLOUS PTOMAPHAGUS BEETLES (COLEOPTERA: LEIODIDAE: CHOLEVINAE)

Published online by Cambridge University Press:  31 May 2012

Stewart B. Peck
Stewart B. Peck
Affiliation:
Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6
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Abstract

Fourteen reciprocal crosses between 11 populations (demes) of troglobitic (obligately cavernicolous) Ptomaphagus beetles were made. Numbers of F1 and F2 larvae and adults are reported. Markedly lower fecundity (but not fertility), viability, and longevity in the hybrids between morphologically distinct populations from Alabama caves indicate substantial reproductive isolation. This and distributional data suggest that the morphologically distinguishable populations are full species.

Résumé

Quatorze croisements réciproques entre 11 populations (dèmes) de coléoptères troglobies (obligatoirement cavernicoles) du genre Ptomaphagus ont été effectués. Les nombres de larves et d'adultes des F1 et F2 sont rapportés. La fécondité (et non pas fertilité), la viabilité et la longévité réduites des hybrides entre des populations morphologiquement distinctes de grottes de l'Alabama, montrent un état avancé d'isolation reproductive. Ceci ajouté aux données de répartition indique que les populations morphologiquement distinctes constituent des espèces vraies.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 5 , May 1983 , pp. 445 - 452
Copyright
Copyright © Entomological Society of Canada 1983

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