WARKENTIN, K.M.: Hatching as a defense against egg predators: the role of vibrational cues Red-eyed treefrogs, Agalychnis callidryas, lay their eggs on vegetation overhanging water, into which the tadpoles fall at hatching. The age and developmental stage at which hatching occurs varies. The ability of hatchlings to escape from aquatic predators improves with development, and […]

Bee, M.A.*; Gerhardt, H.C.: Getting to Know You: Habituation as a Mechanism for Territorial Neighbor Recognition Territorial animals commonly exhibit low levels of aggression toward familiar neighbors in their usual territories and high levels of aggression toward strangers and neighbors in novel locations. Vocal recognition of neighbors is well known in songbirds, and also has […]

SPARKES, T.C.*; YAN, H.Y.; PRATER, C.; AKAMATSU, T: Condition-dependent acoustic signals and their importance for resolving aggressive conflicts in the skunk loach (Botia morleti): integrating sensory and behavioral approaches In the skunk loach, Botia morleti (Pisces, Cobitidae) sounds are produced during aggressive contests over access to hiding places. These contests are costly for both contestants […]

FRANK, C.L.: The nutritional ecology of food hoarding by red squirrels It has proposed that granivory and food hoarding coevolved repeatedly in mammals because seeds tend to retain their nutritional quality during storage, although this hypothesis has not been tested. The effects of prolonged storage on the nutritional composition of five conifer seed species hoarded […]

FOUGEROLLE, M.F.*; TURINGAN, R.G: The effects of prey type on the feeding biomechanics of Archosargus probatocephalus. Ubiquitous species in heterogeneous, coastal habitats typically encounter variable prey-resources. The biomechanical basis for the ability of A. probatocephalus to consume both soft and hard prey organisms within its environment was examined in an attempt to understand the mechanisms […]

MORGAN, S.M.*; ASHLEY-ROSS, M.A.; ANDERSON, D.J.: Incubation in Masked Boobies Lacking brood patches, masked boobies (Sula dactylatra) incubate eggs with their webbed feet. No studies to date have examined incubation temperature in masked boobies. Incubation temperatures were tracked for individual masked boobies nesting in a colony on the island of Espanola, Galapagos, Ecuador. Plastic Easter […]

DAVIS, E.S.: Forced Copulation as an Evolutionary Epiphenomenon To date, two general hypotheses regarding the evolutionary origin of forced copulation (FC) have been proposed. The first and most widely accepted was proposed by McKinney et al. (1983), who posited that FC serves as a secondary reproductive strategy for paired males. Although not essential to their […]

HIGGINS, C.L.; BUTLER, P.J.; STRAUSS, R.E.*: Discrimination of foraging paths produced by different search models The analysis of search paths plays a key role in optimal foraging theory. We developed a simplified model of resource acquisition in which we randomly dispersed N points (“food items”) of equal value within an arena, and considered only the […]

LYNN, S.E.*; BENOWITZ-FREDERICKS, Z.M.; HAYWARD, L.S.; WINGFIELD, J.C.: Testosterone influences male behavior during incubation but not during the parental phase in a temperate passerine Most monogamous male birds exhibit a peak in plasma testosterone (T) in the early spring coincident with territory establishment and pair bonding. Once nests are initiated, T declines precipitously and remains […]

PRETE, F.R.*; HURD, L.E.; JONES, T.; PORTMAN, R.; SINGH, T.B.; CO, J.E.: Scent of a Woman: The First Identification and Assay of a Mantid Pheromone Although insect pheromones are well studied, little is known about their roles in the life of predators such as praying mantids. We examined the mantis Sphodromantis lineola, to determine (1) […]