Growth responses of age 0 white perch and yellow perch from field-enclosure experiments |
| |
Authors: | Donna L Parrish F Joseph Margraf |
| |
Institution: | (1) Ohio Cooperative Fish and Wildlife Research Unit, The Ohio State University, 43210 Columbus, Ohio, USA;(2) Present address: Vermont Cooperative Fish and Wildlife Research Unit, School of Natural Resources, University of Vermont, 05405 Burlington, VT, USA;(3) Present address: West Virginia Cooperative Fish and Wildlife Research Unit, West-Virginia University, 26506 Morgantown, West Virginia, USA |
| |
Abstract: | In this paper, we investigate the potential for competition between age 0 white perch Morone americana and yellow perch Perca flavescens in field-enclosure experiments. In 1986 and 1987, different densities of white perch and yellow perch were stocked into cages in the western basin of Lake Erie and their growth responses determined. Fish were weighed and measured pre- and post-stocking. In 1986 when fish were food-limited, individual growth of both species were negatively affected by increased total fish density; yellow perch to a greater extent. In 1987, experiments were carried out later in the year at lower temperatures. Yellow perch were shown to feed and continue to grow at lower water temperatures than white perch. We conclude that competition in summer may be mitigated in the fall because of differences in thermal optima between these two species. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|