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PHYSIOLOGICAL AND BEHAVIORAL RESPONSES TO PREDATORS SHAPE THE GROWTH/PREDATION RISK TRADE-OFF IN DAMSELFLIES
The results indicate that Enallagma and Ischnura species differ in physiological stress responses to the presence of predators, and this difference may facilitate the coexistence of En allagMA and Is Schnura species in the field.
The role of trematode parasites in larval anuran communities: an aquatic ecologist’s guide to the major players
This review argues that only recently has the role of factors such as trematode parasite infections been incorporated into studies of the population and community dynamics of aquatic systems, and argues that this is due to difficulties faced by aquatic ecologists in sifting through the complex systematics that pervade the parasite literature.
A comparative study of activity levels in larval anurans and response to the presence of different predators
- J. Richardson
A phylogenetic analysis of change in behavior revealed strong positive correlations in evolution of these behaviors and suggests constraints on the ability of larval anurans to independently modify activity levels in the presence versus absence of predators.
Daphnia in tadpole mesocosms: trophic links and interactions with Batrachochytrium dendrobatidis
Daphnia is a keystone zooplankton grazer in intact freshwater ecosystems, whose importance to amphibians may be overlooked and can suppress chytrid epidemics by consuming zoospores and may therefore play a role in Bd infection dynamics.
Adaptive Maternal Adjustments of Offspring Size in Response to Conspecific Density in Two Populations of the Least Killifish, Heterandria formosa
- J. Leips, J. Richardson, F. Helen Rodd, J. Travis
- Biology, MedicineEvolution; international journal of organic…
- 24 April 2009
Plastic responses to density for females from one population that experiences high and variable densities and another that experiences low and less-variable densities are examined, suggesting that this response is evolutionarily conserved in this species.
Male - female morph interactions in the damselfly Nehalennia irene (Hagen)
Overall, males were more attracted to gynochrome females; however, males that showed high response intensity to model males were equally likely to grasp models of the gynchrome and androchrome females.
A comparative study of phenotypic traits related to resource utilization in anuran communities
- J. Richardson
- BiologyEvolutionary Ecology
- 1 March 2002
Results indicate that different lineages have diversified in different ways into the same pond types, and negative correlations between evolutionary change in both mass and growth rate (both stages), and mass and consumption rate (late stage), suggest the presence of trade-offs.
The effect of artificial light on male breeding-season behaviour in green frogs, Rana clamitans melanota
This work quantifies the effects of artificial light on calling and movement behaviour in a rural population of male green frogs (Rana clamitans melanota (Rafinesque, 1820)) during the breeding season and demonstrates that male green frog behaviour is affected by the presence of Artificial light in a manner that has the potential to...
The Behavioral Response of Larval Amphibians (Ranidae) to Threats from Predators and Parasites
The results from this study highlight the importance of considering multiple selective pressures faced by organisms and how this shapes their behavior.
Effects of Chemical Cues on Foraging in Damselfly Larvae, Enallagma antennatum
This study shows a cost in terms of reduced foraging in response to chemical cues and further defines the ability of prey to respond discerningly tochemical cues.