(Download) "Demographics of Coyotes (Canis Latrans) During the Late 1970S and 1990S in Southwestern Illinois." by Transactions of the Illinois State Academy of Science * eBook PDF Kindle ePub Free
eBook details
- Title: Demographics of Coyotes (Canis Latrans) During the Late 1970S and 1990S in Southwestern Illinois.
- Author : Transactions of the Illinois State Academy of Science
- Release Date : January 01, 2007
- Genre: Engineering,Books,Professional & Technical,
- Pages : * pages
- Size : 189 KB
Description
ABSTRACT We collected sex, age, and reproductive data from 100 coyotes harvested by fur-takers during the late-1970s and another 200 in the late-1990s from southwestern Illinois. The two samples had nearly identical male-female sex ratios (0.89:1 and 0.87:1, respectively), and neither differed significantly from parity. The percentage of juveniles (1 year of age) for the 1970s sample (69%) differed significantly from that of the 1990s sample (46%). The high percentage of juveniles in southwestern Illinois during the late-1970s affected breeding rates. Among adult (1 year of age) females, breeding rates were 53% and 72% for the 1970s and 1990s samples, respectively. The mean number of placental scars (PS) per breeding female of the 1970s sample (4.0) was lower, but did not differ significantly from that of the 1990s sample (4.9). The number of coyotes in southwestern Illinois, as elsewhere in the state increased during the late-1970s. Twenty years later, the coyote population in this area of the state and statewide had stabilized. During both time periods, the mean PS counts in this region of the state were lower than those reported for coyotes in more northern latitudes of Illinois.
 "Demographics of Coyotes (Canis Latrans) During the Late 1970S and 1990S in Southwestern Illinois." by Transactions of the Illinois State Academy of Science * eBook PDF Kindle ePub Free){kind=link}