| fisheries productivity in the northeastern pacific ocean over the past 2,200 years. | historical catch records suggest that climatic variability has had basin-wide effects on the northern pacific and its fish populations, such as salmon, sardines and anchovies. however, these records are too short to define the nature and frequency of patterns. we reconstructed approximately 2,200-year records of sockeye salmon abundance from sediment cores obtained from salmon nursery lakes on kodiak island, alaska. large shifts in abundance, which far exceed the decadal-scale variability record ... | 2002 | 11961553 |
| chlorinated hydrocarbons in pelagic forage fishes and squid of the southern california bight. | large quantities of ddt and polychlorinated biphenyls (pcbs) have been historically discharged to the southern california bight (scb). while these contaminants have bioaccumulated in sediment-associated fishes, little data exist on concentrations of these compounds in pelagic forage species that are the likely food source for larger predatory mammals and birds. the goal of the present study was to assess the extent and magnitude of ddt and pcb bioaccumulation in the four major pelagic species of ... | 2007 | 17941729 |
| mortality of sea lions along the central california coast linked to a toxic diatom bloom. | over 400 california sea lions (zalophus californianus) died and many others displayed signs of neurological dysfunction along the central california coast during may and june 1998. a bloom of pseudo-nitzschia australis (diatom) was observed in the monterey bay region during the same period. this bloom was associated with production of domoic acid (da), a neurotoxin that was also detected in planktivorous fish, including the northern anchovy (engraulis mordax), and in sea lion body fluids. these ... | 2000 | 10638756 |
| prey fish returned to forster's tern colonies suggest spatial and temporal differences in fish composition and availability. | predators sample the available prey community when foraging; thus, changes in the environment may be reflected by changes in predator diet and foraging preferences. we examined forster's tern (sterna forsteri) prey species over an 11-year period by sampling approximately 10,000 prey fish returned to 17 breeding colonies in south san francisco bay, california. we compared the species composition among repeatedly-sampled colonies (≥ 4 years), using both relative species abundance and the compositi ... | 2018 | 29543811 |