Rapid proliferation of the parasitic copepod, Salmincola californiensis (Dana), on kokanee salmon, Oncorhynchus nerka (Walbaum), in a large Colorado reservoir

2021 ◽  
Author(s):  
Jesse M. Lepak ◽  
Adam G. Hansen ◽  
Mevin B. Hooten ◽  
Daniel Brauch ◽  
Estevan M. Vigil
Keyword(s):  
Oncorhynchus Nerka ◽  
Parasitic Copepod ◽  
Kokanee Salmon

Prevalence and intensity of the parasitic copepod (Salmincola californiensis) on Kokanee salmon (Oncorhynchus nerka) in a reservoir in Colorado

2014 ◽  
Vol 59 (1) ◽  
pp. 126-129 ◽  
Author(s):  
Lauren N. Hargis ◽  
Jesse M. Lepak ◽  
Estevan M. Vigil ◽  
Carolyn Gunn
Keyword(s):  
Oncorhynchus Nerka ◽  
Parasitic Copepod ◽  
Kokanee Salmon

Elevation of plasma cortisol during the spawning migration of landlocked kokanee salmon (Oncorhynchus nerka kennerlyi)

2000 ◽  
Vol 127 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Laura L Carruth ◽  
Robert M Dores ◽  
Tammy A Maldonado ◽  
David O Norris ◽  
Tina Ruth ◽  
...  
Keyword(s):  
Plasma Cortisol ◽  
Oncorhynchus Nerka ◽  
Spawning Migration ◽  
Kokanee Salmon

Impact of the Introduction of Kokanee (Oncorhynchus nerka) and Opossum Shrimp (Mysis relicta) on a Subalpine Lake

1978 ◽  
Vol 35 (12) ◽  
pp. 1572-1579 ◽  
Author(s):  
Mark D. Morgan ◽  
Stephen T. Threlkeld ◽  
Charles R. Goldman
Keyword(s):  
Population Dynamics ◽  
Lake Trout ◽  
Oncorhynchus Nerka ◽  
Food Sources ◽  
Mysis Relicta ◽  
Kokanee Salmon ◽  
Opossum Shrimp ◽  
Cladoceran Species ◽  
Subalpine Lake ◽  
The Impact

Introductions of opossum shrimp (Mysis relicta) and kokanee salmon (Oncorhynchus nerka) are common management tools for improvement of local sport fisheries. This paper summarizes published information from varied sources and presents supplemental data on the impact of these introductions on the Lake Tahoe zooplankton and fish communities. Concomitant with peak spawning runs of kokanee and the establishment and high densities of Mysis was the disappearance of the three pelagic cladoceran species in the lake. Population dynamics analysis of the cladoceran populations indicate that their elimination was due to increasing death rates (related to Mysis and kokanee predation) and decreasing birth rates (possibly related to cultural eutrophication). Changes have also been observed in the fish populations. Lake trout have altered their food habits to include large quantities of Mysis, but this has been done to the exclusion of other prey types. Thus, improvement in lake trout condition has been indicated only in years when Mysis is abundant. Recent evidence of a sustained decline in the mysid population suggests that unless lake trout shift back to more traditional food sources, their condition could deteriorate to below pre-mysid levels. Finally, mean weight and abundance of kokanee spawners have declined since the cladoceran disappearance, suggesting a negative impact on the whole population which fed heavily on cladocerans. Key words: opossum shrimp, kokanee salmon, population dynamics, cladoceran decline, introductions, subalpine lake

Rule curves for irrigation drawdown and kokanee salmon (Oncorhynchus nerka) egg to fry survival

1981 ◽  
Vol 1 ◽  
pp. 195-218 ◽  
Author(s):  
Q.J. Stober ◽  
R.W. Tyler
Keyword(s):  
Oncorhynchus Nerka ◽  
Kokanee Salmon ◽  
Rule Curves

scholarly journals Immunocytochemical Investigation of a Salmonid Olfactory System-Specific Protein in the Kokanee Salmon (Oncorhynchus nerka)

1996 ◽  
Vol 13 (5) ◽  
pp. 647-653 ◽  
Author(s):  
Hideaki Kudo ◽  
Hiroshi Ueda ◽  
Kohei Yamauchi
Keyword(s):  
Olfactory System ◽  
Oncorhynchus Nerka ◽  
Specific Protein ◽  
Kokanee Salmon ◽  
Immunocytochemical Investigation

scholarly journals Kokanee salmon (Oncorhynchus nerka) population survey at the Helena Valley Reservoir /

1977 ◽  
Author(s):  
Daniel John. O'Neill ◽  
Donald Casper. Moen
Keyword(s):  
Population Survey ◽  
Oncorhynchus Nerka ◽  
Kokanee Salmon

Characteristics of a Naturalized Kokanee Salmon Oncorhynchus nerka Population in Atypical Habitat

2019 ◽  
Vol 181 (1) ◽  
pp. 123
Author(s):  
John Lyons ◽  
David A. Seibel ◽  
Daniel L. Walchak ◽  
Justin M. Haglund ◽  
Aaron F. Nolan ◽  
...  
Keyword(s):  
Oncorhynchus Nerka ◽  
Kokanee Salmon

Molybdenum Concentrations in Tissues of Rainbow Trout (Salmo gairdneri) and Kokanee Salmon (Oncorhynchus nerka) from Waters Differing Widely in Molybdenum Content

1973 ◽  
Vol 30 (6) ◽  
pp. 841-842 ◽  
Author(s):  
James V. Ward
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Nerka ◽  
Weight Basis ◽  
Molybdenum Content ◽  
Salmo Gairdneri ◽  
Kokanee Salmon ◽  
Water Fish ◽  
Wet Weight ◽  
Molybdenum Concentration

Concentrations of molybdenum in tissues of rainbow trout (Salmo gairdneri) from three waters increased only slightly with increase in molybdenum concentration of the water. Fish from high (300 ppb) molybdenum water had mean concentrations of 13–332 ppb on a wet-weight basis; those from low (6 ppb) molybdenum water, 10–146 ppb; and those from trace molybdenum water, 5–118 ppb. Rainbow trout exhibited generally higher molybdenum concentrations than did kokanee salmon (Oncorhynchus nerka) in high molybdenum water. A possible plateau mechanism concerning molybdenum accumulation by salmonids is discussed.

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