DAVENPORT, Iowa – The chase for the 2014 track championships at the Davenport Speedway will begin with the Koehler Electric season opener this Friday, April 25. All five weekly classes, Petersen Plumbing & Heating IMCA Late Models, EMS IMCA Modifieds, Koehler Electric Street Stocks, Hawkeye Auto IMCA SportMods, and Roto-Rooter 4-Stocks, will see action on the quarter-mile dirt oval. Davenport Speedway is located at the Mississippi Valley Fairgrounds, on West Locust Street. Pit gates will open Friday at 4:30 p.m., with hot laps at 6:30 p.m. and racing at 7 p.m. For additional information on DRT TRAK Racing events, visit our new website at www.davenportspeedway.com or call 563 652-5302.
The cost and benefits of territorial tenure, and factors affecting mating success in male Antarctic fur seals
The timing, location and duration of territorial tenure, and the mating success and return rates of male Antarctic fur seals (Arctocephalus gazella) were measured over four consecutive breeding seasons (1984–87) on Bird Island (54°00’S, 38°02’W), South Georgia. Tenure duration (days) followed a heavily skewed, Poisson-like distribution (median 13.08 days, maximum 75 days) and was positively related to the number of years of tenure (rs= 0.52, P 0.7) or to the level of mating success in the current year (P > 0.15). It was, however, positively related to the duration of tenure in the current year (P < 0.0001). The overall annual return rate was 43% which is not significantly different from the survival rate for the general male population and suggests that territorial tenure does not contribute to increased mortality in male Antarctic fur seals.