Calanoid copepods in the California Current system also have exhibited population-level step changes in abundance in response to strong ENSO events and PDO shifts (Rebstock, 2002).
and Pacific Sardine (Sardinops sagax), are also correlated strongly with both ENSO and PDO indices in the California Current system and in the Peru-Chile Current (Tibby, 1937; Hubbs, 1948; Niquen and Bouchon, 2004; Lehodey et al.
For example, in 2005 the spring transition off Vancouver Island occurred in late April, but persistent upwelling did not develop until late July (3) after the development of strong upwelling favorable wind stress in the northern California Current (Pierce et al.
Francis (2003) proclaimed Pacific hake the "poster child of the California Current", emphasizing that this fish "[serves] as a massive stabilizing bridge between the northern and southern parts of the California Current ecosystem" and is distributed "in response to physical and biological cues which vary greatly from year to year.
Prediction and confirmation of seasonal migration of Pacific sardine (Sardinops sagax) in the California Current Ecosystem.
Eastern Boundary Current Program: Report on climate change and the California Current Ecosystern.
west coast and large portions of the California Current ecosystem, and various agencies and institutions are actively collecting the biological and environmental data that will be needed to bring these plans to action (Ecosystem Plan Development Team (2)).
The high productivity of the California Current (CC) is primarily the result of local wind-driven seasonal upwelling and the interaction of alongshore currents with prominent coastal features such as capes, headlands, and bays that advect upwelled water masses into complex patterns of offshore filaments and coastal retentive eddies (Davis, 1985; Gan and Allen, 2002).
Upwelling is what brings nitrates into the Columbia River plume (Lohan and Bruland, 2006) and the California Current and ultimately determines primary and probably secondary production (Hickey and Banas, 2003).
Jack mackerel, which generally spawn off southern California (MacCall and Stauffer, 1983), are not commonly collected as juveniles very far north in the California Current.
1369-1403 in The early stages of fishes in the California Current
Small numbers of mugilid larvae have been collected during annual ichthyoplankton surveys (195 1-1984) conducted in the California Current
region; the highest larval concentrations occur in nearshore stations off central and southern Baja California during the summer and fall (Moser et al.