. Biology of Peromyscus (Rodentia). Mice; Peromyscus. 8 ENDOCRINOLOGY Basil E. Eleftheriou Introduction ADDITIONAL COMPARATIVE in- formation is becoming in- creasingly important in endo- crinology because it will lead to the elucidation of general hor- monal regulatory systems. The genus Peromysciis, with over fifty species, provides the comparative endocrinologist a wide range of phylogenetic divergence within a single genus. Comparisons can be made with the thoroughly investigated laboratory rat and mouse of a different group of rodents. Although, endocrine investigations in Peromysciis are
. Biology of Peromyscus (Rodentia). Mice; Peromyscus. 8 ENDOCRINOLOGY Basil E. Eleftheriou Introduction ADDITIONAL COMPARATIVE in- formation is becoming in- creasingly important in endo- crinology because it will lead to the elucidation of general hor- monal regulatory systems. The genus Peromysciis, with over fifty species, provides the comparative endocrinologist a wide range of phylogenetic divergence within a single genus. Comparisons can be made with the thoroughly investigated laboratory rat and mouse of a different group of rodents. Although, endocrine investigations in Peromysciis are limited, the following summary, indicates the value of the comparative approach and some promising Thyroid Gland Thyroid involvement dviring growth and maturation has been amply demonstrated during postnatal life in the rat (Scow and Simpson, 1945; Salmon, 1936, 1938), mouse (Smith and Starkey, 1940; Hurst and Turner, 1947), guinea pig (Koger and Turner, 1943), rabbit (Koger and Turner, 1943), sheep (Simpson, 1924), goat (Simpson, 1924), dog (Dye and Manghan, 1929), cow (Brody and Kibler, 1941), pig (Movissu, 1892; Caylor and Schlotthauer, 1929), rhesus monkey (Fleischmann and Schumacher, 1943), and man (W^ilkins and Fleischmann, 1941; Hertz and Galli-Mainini, 1941). Similar studies in Peromysciis manicidatiis bairdi and P. m. gracilis have shown that the structure of the thyroid gland appears alike for both subspecies at birth (Fig. 1), but that at 70 days of age, bairdi exhibits a significantly higher thyroid activity than il2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original King, John Arthur, 1921-. [Stillwater, Okla. ] American Society of Mammalogist
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