RAJAKARUNA, R.S.*; BROWN, J.A.; KAUKINEN, K.; MILLER, K.M.: MHC genes influence the kin recognition in juvenile Atlantic salmon Several animal species have the ability to recognize kin from unrelated conspecifics. In salmonids, juveniles can discriminate between unfamiliar kin and unrelated individuals. They probably use a phenotype matching mechanism for the recognition, which involves comparison of […]

KAATZ, I.M.*; LOBEL, P.S.: Intra- and Interspecific Differences in Sound Production in the Neotropical Catfish Genus Corydoras (Callichthyidae) The behavioral contexts of sound production and differences among sounds produced by callichthyid catfishes were characterized using captive populations observed in monospecific groups (10-15 adults per species). Disturbance is a context in which many families of catfishes […]

HUMFELD, SARAH C.*; GERHARDT, H. CARL: Male Acoustic Preferences Parallel Female Mate Choice Preferences Male green treefrogs (Hyla cinerea) attract potential mates, as well as sexual parasites, with their advertisement call. Males using the alternative satellite mating tactic, position themselves silently near a calling male and attempt to intercept females attracted to the caller. In […]

KORZAN, W.J.*; SUMMERS, T.R.; SUMMERS, C.H.: Live or Reflected Aggression Comparison of two established ethological paradigms suggest that the type of experimental design can influence the efficacy of social signaling and the vigor of aggressive display. In two experiments display of social aggression was stimulated in Anolis carolinensis either by a reflection in a mirror […]

HAHN, T. P. *; KELSEY, T. R.; PEREYRA, M. E.: Geographic variation in flight calls of a nomadic cardueline finch, the evening grosbeak (Coccothraustes vespertinus). Many species of oscine songbirds display vocal variation in the form of song dialects. Variation in non-song vocalizations, or calls, is less familiar. Calls, unlike song, are often thought to […]

KARASOV, W.H.; MCSWAN, E.L.; WRIGHT, J.: Begging and digestion by nestling Pied flycatchers in relation to short- and long-term nutritional need An important question regarding parent-nestling interactions is how features of begging relate to nestling physiological status. Nestling birds of different ages, sizes, or developmental histories may have different nutritional needs. How accurately does nestling […]

COSTA, DP; BURNS, JM; CROCKER, DE; FEDAK, MA; TRUMBLE, S; GALES, N: Winter Foraging Ecology of Crabeater Seals The Antarctic marine environment undergoes considerable inter- and intra- annual variability, resulting in marked variation in the spatial and temporal availability of prey for vertebrate predators. Crabeater seals offer a unique opportunity to better understand the foraging […]

KROCHMAL, A.R.; BAKKEN, G.S.: Western Diamond-backed Rattlesnakes (Crotalus atrox) Use Their Facial Pits To Mediate Thermoregulatory Behavior Behavioral thermoregulation can impact foraging behavior, increase predation risk, and impart physiological costs. Locating thermally favorable microsites efficiently would minimize these constraints. Emitted thermal radiation is a direct indicator of an object’s surface temperature; using it as a […]

ANGILLETTA, M.J.*; PRINGLE, R.M.: Thermal Requirements of Offspring Drive the Nesting Behavior of Fence Lizards In squamate reptiles, thermal properties of nests have dramatic consequences for the survival and phenotypes of offspring. Optimal nest sites have been predicted from laboratory studies of the growth and survival of embryos, but tests of these predictions have been […]

YOUNG, B.A.; MORAIN, M.: Prey Localization by Vibration Detection in Saharan Sand Vipers (Cerastes) Snakes of the genus Cerastes are ambush predators which launch strikes while partially, or fully, buried in sand. Our observations indicated that the mouth and snout are typically covered in sand, and tongue flicks are rarely observed prior to predatory strikes. […]