| biological tags for stock separation in pacific herring clupea harengus pallasi in california. | a survey of the parasites of pacific herring (clupea harengus pallasi) off northern california identified 1 species of acanthocephala, 1 species of cestoda, 2 species of copepoda, 1 species and 1 family of digenea, 3 species of nematoda, and 3 species of protozoa. from this survey, lacistorhynchus dollfusi (cestoda), parahemiurus merus (digenea), and anisakis simplex, contracaecum sp., hysterothylacium sp. (nematoda) were selected as potential tags. herring were collected in tomales, san francis ... | 1992 | 1738068 |
| essential and toxic metals in nine fish species for human consumption from two coastal lagoons in the eastern gulf of california. | with the aim of knowing concentrations of cd, cu, fe, mn, pb and zn; percentage of daily mineral intake (pmi) for essential elements and percentage of weekly intake (pwi) of toxic metals in commercial fish from 2 coastal lagoons in the eastern gulf of california, analyses were carried out in 9 species. highest values of cd were detected in the liver of the sharks sphyrna lewini and carcharhinus leucas, pb was mostly detected in the liver of s. lewini; cu and mn in the liver and gills of the mull ... | 2007 | 17680479 |
| unexpectedly high mortality in pacific herring embryos exposed to the 2007 cosco busan oil spill in san francisco bay. | in november 2007, the container ship cosco busan released 54,000 gallons of bunker fuel oil into san francisco bay. the accident oiled shoreline near spawning habitats for the largest population of pacific herring on the west coast of the continental united states. we assessed the health and viability of herring embryos from oiled and unoiled locations that were either deposited by natural spawning or incubated in subtidal cages. three months after the spill, caged embryos at oiled sites showed ... | 2012 | 22203989 |
| 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 |
| citizen science reveals an extensive shift in the winter distribution of migratory western grebes. | marine waterbirds have shown variable trends in abundance over the past four decades with some species displaying steep declines along the pacific coast from british columbia through california. one of the most dramatic changes has been that of western grebes (aechmophorus occidentalis) in the salish sea. this region was a former core of the species wintering distribution but they have become increasingly rare prompting calls for conservation action. a more thorough understanding of this situati ... | 2013 | 23840328 |
| a risk-informed decision framework for setting environmental windows for dredging projects. | sediment dredging is necessary to sustain navigation infrastructure in ports and harbor areas. in the united states alone between 250 and 300 million cubic yards of sediment are dredged annually. dredging activities may cause stress on aquatic biota by locally increasing turbidity and suspended sediment concentrations, physically disturbing habitat by elevated sedimentation rates, interfering in migratory behaviors, and hydraulically entraining bottom dwelling organisms. environmental windows ar ... | 2008 | 18571217 |
| impacts of suspended sediments on fertilization, embryonic development, and early larval life stages of the pacific herring, clupea pallasi. | pacific herring reproduce in the san francisco bay estuary during times of the year when suspended sediment loads are highest due to freshwater input, yet little is known about the effects of sediment on herring early life stages. during the first 2 h after eggs contacted water, embryos were adhesive and susceptible to having sediment particles attach permanently to the chorion. treatment with suspended san francisco bay dredged sediments at ecologically relevant concentrations of 250 or 500 mg/ ... | 2009 | 19366928 |