[Download] "Biological Sciences." by Journal of the Alabama Academy of Science ~ eBook PDF Kindle ePub Free
eBook details
- Title: Biological Sciences.
- Author : Journal of the Alabama Academy of Science
- Release Date : January 01, 2004
- Genre: Engineering,Books,Professional & Technical,
- Pages : * pages
- Size : 201 KB
Description
VERTEBRATE ROAD-KILL SURVEY OF THE MOBILE-BAY CAUSEWAY III. David H. Nelson, Department of Biology, University of South Alabama, Mobile, AL 36688. Cynthia Scardamalia-Nelson, Counselor, Providence Hospital, Mobile, AL 36608. A systematic survey was conducted weekly during 2003 by bicycle (or automobile) on the Mobile Bay Causeway to assess the numbers of vertebrates killed by vehicular traffic. More than 933 organisms were encountered, representing 102 species of vertebrates: 5 amphibians (n=166), 26 reptiles (n=309), 55 birds (n=339), and 16 mammals (n=119). Southern leopard frogs (Rana utricularia) were the most abundant amphibian observed (March to December) representing 73% of all amphibians. "Endangered" Alabama red-bellied turtles (Pseudemys alabamensis, n=99) were the most common reptile, accounting for 32% of all reptiles; most of these (67) were hatchlings. Laughing gulls (Larus atricilla, n=54) and Starlings (Sturnus vulgaris, n=52) were the most frequently encountered birds (representing 16% and 15% of birds, respectively). Raccoons (Procyon lotor, n=42) and Opossums (Didelphis marsupialis, n=36) accounted for 35% and 30% of all mammals, respectively. The most significant finding of this continuing study is the confirmation of 67 hatchlings (March-May, November), 29 adult females (most gravid; May-August), and 3 juveniles (Sept-Oct) of the Alabama red-bellied turtle. Most hatchlings overwintered in the nest to emerge in the early spring. For the last three years, the impact of vehicular mortality on this endangered species has been profound. We also documented the presence of the Florida green water snake (Nerodia floridana) in Baldwin County, Alabama.
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