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Differential Mating Success Of Male Wing Morphs Of The Cricket, Gryllus Rubens, Cami L. Holtmeier, Anthony J. Zera
Differential Mating Success Of Male Wing Morphs Of The Cricket, Gryllus Rubens, Cami L. Holtmeier, Anthony J. Zera
Anthony Zera Publications
Genetically marked individuals were used to study differential mating success between male wing morphs of the cricket, Gryllus rubens. Previous studies of Gryllus rubens and other wing-dimorphic insects have documented that flightless short-winged or wingless females typically attain reproductive maturity earlier and oviposit more eggs relative to their long-winged counterparts. This study was done to determine if flightless males also exhibit enhanced reproductive characteristics. Segregation analyses documented the genetic basis of allozymes used to infer paternity in subsequent experiments. Control experiments documented the absence of effects on mating success independent of wing morph due to (1) the genetic stock …
Differential Allocation Of Resources Underlies The Dispersal-Reproduction Trade-Off In The Wing-Dimorphic Cricket, Gryllus Rubens, Simon Mole, Anthony J. Zera
Differential Allocation Of Resources Underlies The Dispersal-Reproduction Trade-Off In The Wing-Dimorphic Cricket, Gryllus Rubens, Simon Mole, Anthony J. Zera
Anthony Zera Publications
The cricket, Gryllus rubens (Orthoptera, Gryllidae), exists in natural populations as either a fully-winged (LW), flight-capable morph or as a short-winged (SW) morph that cannot fly. The SW morph is substantially more fecund than the LW morph. In this study we report on the physiological basis of this trade-off between flight capability and fecundity. Results from gravimetric feeding trials indicate that LW and SW morphs are equivalent in their consumption and digestion of food. However, during the adult stage, the LW morph is less efficient in converting assimilated nutrients into biomass. This may be a consequence of the respired loss …