This collection of articles is a sampling of papers vironmental Toxicants and their Effects on the from the second biennial symposium for the 'Etho­ Ethology and Behavioral Ecology of Fishes', or­ logy and Behavioral Ecology of Fishes'. This con­ ganized by Mary Henry and Jack Ward featured ference was also the first North American Meeting invited papers by: John B. Sprague; Mary G. Henry & Gary J. Atchison; as well as contributed papers of the 'International Association of Fish Etholog­ ists' and was held October 19-22, 1979 ·on the Il­ by Robert A. Drummond, Daniel Abel & Chris­ linois State University campus in Normal. Illinois, topher C. Koenig; C. G. Prewitt & C. B. Stalnaker; U. S. A., the site for the first conference in 1977 Kenneth S. Lubinski; J. Doerzbacher & C. F. Bryan; and the proposed site for the third biennial con­ Michael A. Barry; Allen E. Bingham & Robert G. ference scheduled for May 1981. The organiza­ White. tional committee for these conferences is Jack The symposium 'Reproductive Tactics' was or­ Ward, Chairman, Illinois State University (Biology, ganized by Luther Brown, Jeff Baylis and David Normal, IL 61761); Jeffrey Baylis, University of Noakes, and featured invited papers by: Jerry F. Wisconsin (Zoology, Madison, WI 53706); Luther Downhower, Luther Brown, R. Pederson & G. Brown, George Mason University (Biology, Fair­ Staples; Roger Thibault; George Barlow; Richard fax, VA 22030); Mike Fitzsimmons, Louisiana State Borowsky & John Diffley; Jack Ward & J. I.

InhaltsangabeA new stereophotographic technique for analyzing the three dimensional structure of fish schools.- Computer tools for the analysis of schooling.- Facultative schooling behavior in the spottail shiner (Notropis hudsonius): possible costs and benefits.- Effects of alarm substance on schooling in the common shiner (Notropis cornutus, Cyprinidae).- Attraction of zebrafish, Brachydanio rerio, to isolated and partially purified chromatographic fractions.- Reduction of competition between bisexual and unisexual females of Poecilia in northeastern Mexico.- Synchronized maturation and breeding in natural populations of Xiphophorus variatus (Poeciliidae).- Maintenance of female mimicry as a reproductive strategy in bluegill sunfish (Lepomis macrochirus).- Patterns of parental investment, dispersal and size among coral-reef fishes.- The reproductive behaviour of Aequidens vittatus (Pisces, Cichlidae) in Surinam, South America.- Reproductive tactics of the Asian cichlids of the genus Etroplus in Sri Lanka.- Habitat segregation in a salt marsh among adult sticklebacks (Gasterosteidae).- Factors affecting fish diversity on a temperate reef.- Abstracts.