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pro vyhledávání: '"J H Helle"'
Autor:
J. H. Helle
Publikováno v:
Journal of Fish Biology. 35:99-107
Data on age- and size-at-maturity, growth, and abundance of chum salmon were collected from 1959 to 1977 at Olsen Creek in Prince William Sound, Alaska. Age composition of spawners (3 to 6-year-olds) varied from year to year: 4-year-old fish were the
Autor:
C M Guthrie, J H Helle, S McKinnell, J. F. Koerner, Bruce L. Wing, A. J. Thomson, E. A. Black
Publikováno v:
Aquaculture Research. 28:145-157
The first catches of Atlantic salmon, Salmo salar L., in British Columbia (BC) waters occurred in 1987. The first reported escape of Atlantic salmon (2000 individuals) occurred in 1988. From 1988 to 1995, 97 799 Atlantic salmon were reported escaped
Autor:
C. D. Russell, S. L. Hawkins, Anthony J. Gharrett, C. M. Kondzela, J. H. Helle, Charles M. Guthrie
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 51:50-64
Allozymes from 46 loci were analyzed from chum salmon (Oncorhynchus keta) collected at 61 locations in southeast Alaska and northern British Columbia. Of the 42 variable loci, 21 had a common allele frequency
Publikováno v:
Genetic Conservation of Salmonid Fishes ISBN: 9781461362425
Although there are numerous serious threats to the persistence of individual wild pink (Oncorhynchus gorbuscha), chum (O. keta), sockeye (O. nerka), coho (O. kisutch), and chinook (O. tshawytscha) salmon populations in their native range, these speci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d85ef6dcd8e57ae3e43a0a991e37b8e9
https://doi.org/10.1007/978-1-4615-2866-1_25
https://doi.org/10.1007/978-1-4615-2866-1_25
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 38:1867-1876
Examples of desired genetic changes produced in fish by selective breeding are contrasted with those of unintentional and often harmful genetic changes resulting from artificial propagation over prolonged periods, e.g. reduced longevity and reduced t