Population biology and ecology of the Pacific white-sided dolphin Lagenorhynchus obliquidens in the Northeastern Pacific: Part I: Distribution, seasonal movements and abundance with a bibliography and summary of specimen material

In 1979, under contract frcm the Southwest Fisheries Center, NMFS, we began a study of the population biology and ecology of white-sided dolphins in the northeastern Pacific. The study is being conducted in two phases. During Phase I, results of which are reported herein, we 1) reviewed and analyzed all available data on distribution, seasonal movements and abundance, 2) inventoried specimens collected from the study area and obtained for analysis all available data on specimen materials - photographs, external measurements, skeletons and osteological data, reproductive organs, teeth, parasites and stcmach contents,3) tabulated all raw and derived data and 4) assembled and reviewed available technical literature and prepared a bibliography. During Phase II, results of which will be reported separately, we are obtaining readings of layers in thin-sectioned teeth and performing analysis of all data, following Perrin (1975) and Walker (1981). Goals of analysis are to characterize geographic variation, morphology and general biology of Lagenorhynchus obliquidens in the northeastern Pacific Ocean. 1982 Contract no. NOAA/79-ABC-00201 NMFS (National Marine Fisheries Service) SWFSC (Southwest Fisheries Science Center) Library Public Domain 1930