Director's Report for 1978
Jennifer M. Shay

Aspects of parental care in the Yellow Warbler: a preliminary report
G. C. Biermann, Department of Zoology, University of Manitoba

Sources of selection on vocalization in wetland birds
Susan Cosens, Department of Zoology, University of Toronto

The ecology and distribution of Mustela frenata Lichtenstein in Manitoba: habitat selection at Delta Marsh
R. L. Gamble, Department of Zoology, University of Manitoba

A preliminary investigation of the distribution of Enteromorpha sp. in Delta Marsh, Manitoba
N. Hooper-Reid, Department of Botany, University of Manitoba

A study of the seasonal population dynamics of the tick Dermacentor variabilis, in a marshland habitat
K. G. Kgoroba, Department of Zoology, University of Manitoba

The Lake Manitoba stratigraphic record: a preliminary summary
W. M. Last and J. T. Teller, Department of Earth Sciences, University of Manitoba

Morphological variation in Plagiorchis noblei Park, 1936 (Trematoda: Plagiorchiidae) from Tyrannus tyrannus and T. verticalis (Aves: Tyrannidae)
D. I. MacKenzie and C. E. McKenzie, Department of Zoology, University of Manitoba

Comparison of the helminth fauna of Eastern and Western Kingbirds at Delta Marsh, Manitoba
D. I. Mackenzie, C. E. McKenzie and L. W. Brownlie, Department of Zoology, University of Manitoba

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