The population dynamics of Tanypus stellatus in Goshen Bay of Utah Lake was investigated from July 18, 1973, to August 5, 1974. Samples were collected from three stations with an Ekman grab and a K-B corer. The samples were washed in a 110 micron nitex screen and then floated in a sucrose solution. The K-B core was used to determine the vertical distribution of Tanypus stellatus. Ninety-six percent of the Tanypus stellatus larvae are located in the top five centimeters; 99 percent are less than ten centimeters deep. The Ekman grab was used to study the population dynamics of the larvae. The population trends observed are likely true for the entire bay and possibly the lake also. Early instar larvae tend to be contagiously distributed and later instars are more randomly distributed. Two emergence periods occurred. One in July and one in August. Larvae overwintered in the first and second instar. Possible temperature relationships are also discussed.
College and Department
Plant and Wildlife Sciences
BYU ScholarsArchive Citation
Shiozawa, Dennis Kenji, "The population dynamics of Tanypus stellatus Coquillett (Diptera: chironomidae) in Goshen Bay of Utah Lake" (1974). Theses and Dissertations. 7872.