Organochlorine residues in three heron species as related to diet and age
No abstract available.
Geology topics
Publications and source records attributed to T.S. Baskett.
No abstract available.
No abstract available.
Results confirmed pairing as the primary factor influencing perch-cooing rates of wild mourning doves ( Zenaida macroura ). Marked unmated males cooed at substantially higher rates (6.2x) than mated males, had greater probability of cooing (2.3x) during 3-minute periods, and continued cooing longer each morning than mated males. Population density was not a major factor affecting cooing. Unmated males cooed more frequently in the presence of other cooing doves (P < 0.05) than when alone, but the number of additional doves above 1 was unimportant. Cooing rates of both mated and unmated males on areas with dissimilar dove densities were not significantly different. Within limits of standard call-count procedure, weather exerted no detectable influence on cooing.
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