A study designed to investigate the effects of permanent maternal separation in infant rhesus monkeys, 60, 90, and 120 days of age, and housed individually or in Paris. Monkeys separated at 90 days and housed individually showed the highest levels of disturbance. (DP)

The use of a trained sea lion to locate and attach a retrieval device to submerged instruments and test equipment is described. (CP)

To examine the effects of vomeronasal deprivation on strike-induced chemosensory searching (SICS) in rattlesnakes we used a newly developed technique to anesthetize the vomeronasal organs. We compared rate of tongue flicking after striking prey in avomic rattlesnakes to vomic controls. Avomic rattlesnakes exhibited significantly fewer tongue…

Key pecking by 3 pigeons was maintained by a multiple fixed-ratio 10, fixed-ratio 30, fixed-ratio 90 schedule of food presentation. Components differed with respect to amount of reinforcement, such that the unit price was 10 responses per 1-s access to food. Acute administration of morphine, "l"-methadone, and cocaine dose-dependently decreased…

Small deviations from bilateral symmetry (fluctuating asymmetries) are cues to fitness differences in some animals. Therefore, researchers have considered whether animals use these small asymmetries as visual cues to determine appropriate behavioral responses (e.g., mate preferences). However, there have been few systematic studies of animals'…

Biology laboratories are usually designed around convenient and available subjects. For example, for animal laboratories "Daphnia magna," "Drosophila melanogaster," frogs, rats, and mice are common animals that are relatively easy to obtain, relatively cheap, and consequently lend themselves well to laboratory experimentation. On many campuses, …

The purpose of the present study was to examine the relative adequacy of the dry mouth vs. emotional theories of SIP using the desalivate rat. (Author)

Food preferences set by delayed visceral effects facilitate memory research and predator control. (Author/RH)

Analogies can be useful in the study of behavior, physiology, and comparative evolution. Dangers in mistaking a homology for an analogy are discussed. (RH)

The diverse effects of light on plants and animals are reviewed in general. The conditioned behavior of fruit flies is also discussed. For the second article in this series, see SE 511 548. (DT)

Reviews phenomena associated with social separation from attachment objects in nonhuman primates. Evaluates four theoretical treatments of separation in light of existing data: Bowlby's attachment-object-loss theory, Kaufman's conservation-withdrawal theory, Seligman's learned helplessness theory, and Solomon and Corbit's opponent-process theory.…

This Sioux tale recounts the death of a village after the destruction of sacred snakes. (RTS)

An unusual innovation that has been used at Dover Plains Environmental Education Center and which involves a scarecrow is described in this article on birdwatching. (JC)