Condition of kokanee (Oncorhynchus nerka) population in Tolmachevskoye reservoir in 2017
نویسندگان
چکیده
منابع مشابه
The origin and genetic divergence of “black” kokanee, a novel reproductive ecotype of Oncorhynchus nerka
Kokanee and sockeye salmon are the freshwater-resident and anadromous forms, respectively, of Oncorhynchus nerka. Unique populations of “black” kokanee are found in Lake Saiko, Japan, and in Anderson and Seton lakes in the southwestern interior of British Columbia. They are distinct from other populations of O. nerka in that black kokanee display black nuptial colouration and they spawn between...
متن کاملSeasonal Variations in Relative Weight of Lake Trout (Salvelinus namaycush), Kokanee Salmon (Oncorhynchus nerka), Rainbow Trout (Onocorhynchus mykiss), and Brown Trout (Salmo trutta) in Blue Mesa Reservoir, Colorado
Blue Mesa Reservoir is the largest body of water in Colorado and is located on the western slope of the Rocky Mountains at an elevation of 7520 feet. Blue Mesa Reservoir contains recreationally important populations of l ake trout (Salvelinus namaycush), kokanee salmon (Oncorhynchus nerka), rainbow trout (Onocorhynchus mykiss), and brown trout (Salmo trutta). A management challenge in recent ye...
متن کاملProlongation of the Life Span of Kokanee Salmon (oncorhynchus Nerka Kennerlyi) by Castration before Beginning of Gonad Development.
elegance. Although much more precision could be added to the system, it is doubtful whether the purely qualitative aspects could ever be removed. The shape of the generating curve, for example, is generally irregular enough to greatly hinder mathematical description. Furthermore, the complete generating curve, as a closed curve, can rarely be seen, and thus its position relative to the axis of ...
متن کاملDensity-Dependent Growth in Juvenile Sockeye Salmon (Oncorhynchus Nerka)
Data gathered over 77 lake-years from 4 coastal British Columbia sockeye salmon nursery lakes suggest that density-dependent growth reductions are only possible at exceptionally high fry densities. In Great Central Lake (n=33 years) and Sproat Lakes (n=30 years) there was no relationship between smolt weight and mean summer fry densities ranging from 760-3800 fry ha -1 . However, in two years w...
متن کاملRecent Ecological Divergence despite Migration in Sockeye Salmon (oncorhynchus Nerka)
Ecological divergence may result when populations experience different selection regimes, but there is considerable discussion about the role of migration at the beginning stages of divergence before reproductive isolating mechanisms have evolved. However, detection of past migration is difficult in current populations and tools to differentiate genetic similarities due to migration versus rece...
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ژورنال
عنوان ژورنال: The researches of the aquatic biological resources of Kamchatka and of the north-west part of the Pacific Ocean
سال: 2017
ISSN: 2072-8212
DOI: 10.15853/2072-8212.2017.47.46-64