Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Biology
Food Availability And Parasite Infection Influence Mating Tactics In Guppies (Poecilia Reticulata), Gita R. Kolluru, Gregory F. Grether, Eric Dunlop, Sandra H. South
Food Availability And Parasite Infection Influence Mating Tactics In Guppies (Poecilia Reticulata), Gita R. Kolluru, Gregory F. Grether, Eric Dunlop, Sandra H. South
Biological Sciences
Despite the important effects of diet and parasite infection on male reproductive behavior, few studies have simultaneously addressed their influence on intrasexual selection (male–male competition). We examined the synergistic effects of 2 naturally varying environmental factors, lifetime food intake and infection, with the monogenean parasite Gyrodactylus turnbulli on the mating tactics and foraging behavior of male guppies (Poecilia reticulata). We allowed fish to interact directly with each other during observations and found that unparasitized males won more intermale contests, courted females more frequently, and received positive responses to courtship displays more frequently than males that had been infected. …
The Effects Of Carotenoid And Food Intake On Caudal Fin Regeneration In Male Guppies, Gita R. Kolluru, N. C. Ruiz, N. Del Cid, Eric Dunlop, Gregory F. Grether
The Effects Of Carotenoid And Food Intake On Caudal Fin Regeneration In Male Guppies, Gita R. Kolluru, N. C. Ruiz, N. Del Cid, Eric Dunlop, Gregory F. Grether
Biological Sciences
The trade‐offs involved in allocating carotenoid pigments and food to healing and regrowing damaged caudal fin tissue v. other functions were examined in guppies Poecilia reticulata, a species in which females prefer males that display larger amounts of carotenoids in their skin. The guppies were derived from four natural populations in Trinidad that differed in resource availability but not predation intensity. Carotenoids, food and site of origin did not affect either absolute or relative fin regrowth, which suggested that fin regeneration in guppies was not constrained by carotenoid availability. It is possible that carotenoid intake influences fin regeneration in …
The Effects Of Resource Availability On Alternative Mating Tactics In Guppies (Poecilia Reticulata), Gita R. Kolluru, Gregory F. Grether
The Effects Of Resource Availability On Alternative Mating Tactics In Guppies (Poecilia Reticulata), Gita R. Kolluru, Gregory F. Grether
Biological Sciences
Food availability can influence the optimal allocation of time and energy among alternative behaviors such as foraging, courting, and competing for mates. If populations differ consistently in food availability, selection may cause geographic divergence in allocation strategies. At the opposite extreme, a norm of reaction may evolve such that food intake influences the allocation strategy of individuals in the same way in all populations. Between these two extremes, food intake reaction norms may diverge genetically among populations. For example, at sites where food is scarce, selection may strengthen the effect of food intake on behavior, whereas at sites with abundant …