Describes three experiments which investigated the behavior of "Colisa fasciata" males in full breeding condition subjected to competition for nest sites and a single female. Concludes that for these fish territorial dominance is established in a relatively short time, the period varying with the intensity of competition. (MLH)

Suggests that the use of anthropomorphic statements are appropriate when dealing with children operating at the preoperational and concrete levels. For these children anthropomorphic formulations are not only natural, but actually aid comprehension of the world theyobserve. (JR)

The excitement of sociobiology comes from the promise of the role it will play in humanistic investigation. Its potential importance beyond zoology lies in its logical position as the bridging discipline between the natural sciences on the one hand and social sciences and humanities on the other. (Author/AM)

The biology and ecology of the sea otter are described in this article. Degradation of otter habitats by humans is examined with management implications. (MA)

Describes the natural habitat, life-history, and behavior of gerbils. These animals do not drink water, are virtually odorless, can withstand wide temperature ranges, and require minimal attention. As a result they have become popular in research and science classrooms in recent years. (JR)

Describes methods of collecting crayfish and maintaining them in the classroom. Also discusses reproduction and molting of crayfish. (MA)

This article focuses on the mechanisms of the human brain which bring about body movements. Included is a discussion of the way in which the brain and spinal cord issue commands and receive signals. (Author/SA)

Describes a field trip to collect planarians as successful in generating interest in the sciences. This activity is suitable for all grade levels as a field trip or biology lab. Planarians can be easily collected from streams across the United States. Once in the classroom, planaria are easily fed and cared for. (SAH)

Presents an experiment that teaches the evolutionary approach to the study of animal behavior. (ASK)

Presents a laboratory experiment that examines the aggressive behavior of male paradise fish. Students design the experiment, collect data, and analyze and interpret the results. This activity is appropriate for biology, ecology, and animal behavior classes and allows students to be involved in the entire scientific process. (Author/NB)

Examines threatened extinction of birds and recommends agencies adopt policies which minimize the pace of extinctions through the setting aside of large preserves which protect natural vegetation formation and the animal life. (BR)

The life patterns, behaviors, and functions of the social insects, the honeybees, are presented in this publication. Illustrations and information are offered on the topic areas of: (1) the honeybee society (explaining the jobs of the queen, worker, and drone bees); (2) the hive (describing how the hive is constructed, how new bees develop, and…

Describes three experiments for undergraduates which illustrate associations of parasites with their host. Includes a table of parasite-induced alterations of selected host species. Instructional suggestions are also provided. (ML)