Differences in stability effects on the marine survival of hatchery pink salmon (Oncorhynchus gorbuscha) within the upwelling and downwelling domains of the northeast Pacific Ocean

2012 ◽  
Vol 21 (6) ◽  
pp. 430-444 ◽  
Author(s):  
SARA E. MILLER ◽  
MILO D. ADKISON ◽  
LEWIS J. HALDORSON
Keyword(s):  
Pacific Ocean ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Northeast Pacific ◽  
Marine Survival ◽  
Northeast Pacific Ocean ◽  
Upwelling And Downwelling

Possible Effects of the Sitka Eddy on Sockeye (Oncorhynchus nerka) and Pink Salmon (Oncorhynchus gorbuscha) Migration off Southeast Alaska

1986 ◽  
Vol 43 (2) ◽  
pp. 498-504 ◽  
Author(s):  
Kevin Hamilton ◽  
Lawrence A. Mysak
Keyword(s):  
Oncorhynchus Nerka ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Surface Currents ◽  
Oceanic Circulation ◽  
Migration Routes ◽  
Southeast Alaska ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Northeast Pacific ◽  
Northeast Pacific Ocean

The interannual variability of sockeye (Oncorhynchus nerka) and pink salmon (Oncorhynchus gorbuscha) catches during 1952–62 from southeast Alaska and northern British Columbia is examined in relation to the appearance and disappearance of the Sitka eddy in the offshore oceanic circulation. In years when this large (~300 km in diameter) and intense (surface currents ~0.5 m/s) vortex is present, the spawning migration routes of salmon returning to the Nass and Skeena rivers tend to be deflected southward. An analysis of salmon tagging data collected during 1957 (when the eddy was absent) and 1958 (when the eddy was present) supports this conclusion. The southward deflection during 1958 is a particularly interesting result in light of many other observations which show that several fish species were displaced northward during the 1958 warming of the northeast Pacific Ocean.

Short-term Rearing of Pink Salmon (Oncorhynchus gorbuscha) Fry: Effect on Survival and Biomass of Returning Adults

1981 ◽  
Vol 38 (5) ◽  
pp. 554-558 ◽  
Author(s):  
Roy M. Martin ◽  
William R. Heard ◽  
Alex C. Wertheimer
Keyword(s):  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Short Term ◽  
Marine Diatoms ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Salmon Fry ◽  
Marine Survival

Survival of pink salmon (Onchorynchus gorbuscha) fry could theoretically be improved if they were reared to a larger size before being released into the estuary. Three lots of 1975-brood pink salmon fry, reared from eggs in a hatchery, were cultured in floating estuarine raceways for 30, 60, and 90 d before being released into the Little Port Walter estuary on Baranof Island, southeastern Alaska. An unfed control lot was released after emergence. Four groups of 15 000 fry each were differentially fin marked. Total marine survival for the four lots was computed from recoveries of marked adults in the Little Port Walter vicinity in 1977. Survival from release to return was lowest for the control lot (3.1%); increased for fry reared for 30 and 60 d (4.6 and 5.2%, respectively); and decreased for fry cultured for 90 d (4.3%). Mortalities in lots cultured for 60 and 90 d significantly reduced the numbers of fry released in these groups. Mortalities were associated with the marine diatoms Chaetoceros spp. Mean length and weight of returning adults declined with increased fry-rearing time. Compared with the control lot, adults from fry cultured for 30 d had 39% more biomass; adults from fry cultured for 60 d had the same biomass; and adults from fry cultured for 90 d had 45% less biomass. Culturing fry for 30 d in the raceways significantly increased the number and biomass of returning adults.Key words: short-term rearing, Oncorhynchus gorbuscha, floating estuarine raceways, marine survival, biomass

Survival of pink salmon (Oncorhynchus gorbuscha) fry to adulthood following a 10-day exposure to the aromatic hydrocarbon water-soluble fraction of crude oil and release to the Pacific Ocean

1999 ◽  
Vol 56 (11) ◽  
pp. 2087-2098 ◽  
Author(s):  
I K Birtwell ◽  
R Fink ◽  
D Brand ◽  
R Alexander ◽  
C D McAllister
Keyword(s):  
Pacific Ocean ◽  
Crude Oil ◽  
Soluble Fraction ◽  
Pink Salmon ◽  
Water Soluble ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Water Soluble Fraction ◽  
The Pacific ◽  
The Pacific Ocean

Saltwater-acclimated, coded-wire tagged, and adipose fin clipped pink salmon (Oncorhynchus gorbuscha) fry were exposed for 10 days to seawater (control) or 25-54 μg·L-1 (low dose) or 178-349 μg·L-1 (high dose) of the water-soluble fraction (WSF) of North Slope crude oil. The WSF was composed primarily of monoaromatics and was acutely lethal to the fry: 96-h LC50 ranged from 1 to 2.8 mg·L-1. After exposure the fry (30 000 per treatment) were released into the Pacific Ocean to complete their life cycle. The experiment was replicated in 1990, 1991, and 1992. There was no consistent significant dose-dependent effect of the 10-day exposure to the crude oil WSF on growth of the pink salmon prior to their release. Adult pink salmon from this experiment were captured in fisheries and also recovered from their natal Quinsam River, British Columbia. Pink salmon from each treatment group were recovered in similar numbers. Exposure of populations of fry to the WSF of crude oil and release to the Pacfic Ocean did not result in a detectable effect on their survival to maturity. Fry from all treatment groups incurred typically high mortality following release, and there were no discernible effects on survival that were attributable to exposure to the WSF of crude oil.

scholarly journals Ecological factors influencing lifetime productivity of pink salmon (Oncorhynchus gorbuscha) in an Alaskan stream

2017 ◽  
Vol 74 (9) ◽  
pp. 1325-1336 ◽  
Author(s):  
Christopher V. Manhard ◽  
John E. Joyce ◽  
William W. Smoker ◽  
Anthony J. Gharrett
Keyword(s):  
Time Series ◽  
Juvenile Fish ◽  
Pink Salmon ◽  
Survival Rates ◽  
Ecological Factors ◽  
Environmental Data ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Substrate Quality ◽  
Marine Survival

Ecological factors underlying freshwater productivity and marine survival of pink salmon (Oncorhynchus gorbuscha) were evaluated by analyzing a 30 year time series of local environmental data and censuses of migrating adult and juvenile fish collected at Auke Creek, Alaska. Freshwater productivity was influenced primarily by spawning habitat limitation and less so by stream temperature and flow. Furthermore, a trend of declining freshwater productivity was detected over the time series, which may be related to observed declines in spawning substrate quality and in the duration of the adult migration. Marine survival was highly variable among brood years and was influenced by physical conditions in the nearshore marine environment; warm sea-surface temperatures during nearshore residency were associated with higher marine survival rates, whereas high stream flows late in the fry emigration period were associated with reduced marine survival. Simulations of adult recruitment, based on ecological factors in the freshwater and marine environments, indicated that the productivity of pink salmon in this stream is determined primarily by early marine survival.

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