There are comparatively few records of pregnant females, especially in the eastern North Pacific. However, there are a large number of juveniles and young of the year fish in the southern California Bight indicating that it is a nursery area. In summer, the Southern California Bight is home to a large population of Shortfin Mako sharks (Klimley et al. 2002, Holts and Kohin 2003). Abundance surveys and fishing reports indicate that juvenile mako sharks appear in the Bight in spring when water temperatures rise above 16°C and may depart from the area in fall when water temperatures decline.
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