By M. Demerec (Ed.)
Read or Download Advances in Genetics, Vol. 5 PDF
Best mammals books
Bats: A World of Science and Mystery
There are greater than 1,300 species of bats—or nearly 1 / 4 of the world’s mammal species. yet sooner than you minimize in worry from those bushy “creatures of the night,” ponder the bat’s basic function in our environment. A unmarried brown bat can devour numerous thousand bugs in an evening.
Spliceosomal Pre-mRNA Splicing: Methods and Protocols
Supplying a advisor to classical experimental techniques to decipher splicing mechanisms and experimental recommendations that depend upon novel multi-disciplinary techniques, Spliceosomal Pre-mRNA Splicing: equipment and Protocols describes the speculation of different pre-mRNA splicing in seven introductory chapters after which introduces protocols and their theoretical history proper for a number of experimental examine.
- Foreign Compound Metabolism in Mammals Volume 6
- Mating Males: An Evolutionary Perspective on Mammalian Reproduction
- Antarctic Seals: Research Methods and Techniques
- The Coat Colors of Mice: A Model for Mammalian Gene Action and Interaction
- Apes, Language, and the Human Mind
Extra info for Advances in Genetics, Vol. 5
I n one set of observations, all young had disappeared from the population in 9 weeks, but this could have been accounted for in part by dispersal. Bourliere (1951) quotes evidence of a similarly short life span for Microtus guentheri from Bodenheimer and for Citellus pygmaeus from Kalabuchov. The only argument contrary to the considerable evidence that a small mammal rarely lives out its potential life span in nature comes from Hamilton (1937b, 1940). He apparently believed that Microtus pennsylvanicus “burns out” physiologically because of (1) attainment of sexual maturity at an uncommonly early age, (2) extreme prolificness, and (3) little cessation of activity in its search for food.
Both of these experiments indicated movement from areas of high to areas of low population density. Stickel (1946) demonstrated similar behavior in Peromyscus leucopus when she marked the mice on a circular, 17-acre area before beginning to remove the mice from a central, 1-acre plot. As the animals were removed from the central plot, others were taken there from increasingly greater distances. Spencer (1941) ran snap-traps on a 5-acre plot for a period of 10 months to measure “drift” in rodent populations.
A t the end of 2 weeks, the population had rebuilt to 25, of which 20 were sexually mature animals that moved from adjacent areas and 2 were young mice. 9-acre area inhabited by 1 pair of deer mice 28 W. PRANK BLAIR vas overpopulated when 22 adult males, 19 adult females, and 4 young females were released there. Trapping during the second week revealed only the resident pair, 2 liberated adult males and 3 females, and 5 juvenile mice. Ten of the mice that disappeared were retaken at distances of 825 to 1815 feet.