A Towhee in December

Assessment of Nuclear Moisture Density Gauges at a Secondary Standard Dosimetry Laboratory in Ghana during December 2015–December 2017

Introduction: Nuclear moisture density gauges are widely used in construction industry in different countries across the world, including Ghana, on a large scale. Like all irradiating devices, the nuclear gauges should be subjected to radiation safety assessment based on radiation protection and safety principles. Regarding this, the objective of this research was to i...

Systematic3 of the White-throated Towhee (pzpzlo Albzcollzs)

BAGNARA, J. T., T. D. TAYLOR, AND M. E. HADLEY. 1968. The dermal chromatophore unit. J. Cell Biol. 38:67-79. ENGELS, W. L. 1959. The influence of different day lengths on the testes of a transequatorial migrant, the Bobolink (D&&onyx oryzioorus), p. 759766. In Photoperiodism and related phenomena in plants and animals. Publ. 55, Amer. Assoc. Adv. Sci., Washington, D.C. FISHER, R. A., AND F. YAT...

Cover vol. 12, no. 6, December 2015

cover 16-6 December 2019

Negative energy balance in a male songbird, the Abert's towhee, constrains the testicular endocrine response to luteinizing hormone stimulation

Energy deficiency can suppress reproductive functions in vertebrates. As the orchestrator of reproductive function, endocrine activity of the hypothalamo-pituitary-gonadal (HPG) axis is potentially an important mechanism mediating such effects. Previous experiments in wild-caught birds found inconsistent relationships between energy deficiency and seasonal reproductive function, but these exper...