Access the full text.
Sign up today, get DeepDyve free for 14 days.
N. Ryman, G. Ståhl (1980)
Genetic changes in hatchery stocks of brown trout (Salmo trutta).Canadian Journal of Fisheries and Aquatic Sciences, 37
S. Wright (1943)
Isolation by Distance.Genetics, 28 2
F. Allendorf, R. Leary (1988)
Conservation and Distribution of Genetic Variation in a Polytypic Species, the Cutthroat TroutConservation Biology, 2
A. Kapuscinski, J. Lannan (1984)
Application of a conceptual fitness model for managing Pacific salmon fisheriesAquaculture, 43
N. Ryman, F. Allendorf, G. Ståhl (1979)
Reproductive isolation with little genetic divergence in sympatric populations of brown trout (Salmo trutta).Genetics, 92 1
G. Meffe (1986)
Conservation Genetics and the Management of Endangered FishesFisheries, 11
S. Wright (1950)
Genetical structure of populations.Nature, 166 4215
C. Krueger, A. Gharrett, Terrence Dehring, F. Allendorf (1981)
Genetic Aspects of Fisheries Rehabilitation ProgramsCanadian Journal of Fisheries and Aquatic Sciences, 38
M. Soulé, M. Gilpin, W. Conway, T. Foose (1986)
The millenium ark: How long a voyage, how many staterooms, how many passengers?Zoo Biology, 5
P. Larkin (1981)
A Perspective on Population Genetics and Salmon ManagementCanadian Journal of Fisheries and Aquatic Sciences, 38
N. Ryman (1983)
Patterns of distribution of biochemical genetic variation in salmonids: differences between species.Aquaculture, 33
S. Wright (1931)
Evolution in mendelian populationsBulletin of Mathematical Biology, 52
K. Hindar, N. Ryman, F. Utter (1991)
Genetic Effects of Cultured Fish on Natural Fish PopulationsCanadian Journal of Fisheries and Aquatic Sciences, 48
A. Kapuscinski, J. Lannan (1986)
A conceptual genetic fitness model for fisheries managementCanadian Journal of Fisheries and Aquatic Sciences, 43
F. Utter (1981)
Biological Criteria for Definition of Species and Distinct Intraspecific Populations of Anadromous Salmonids Under the U.S. Endangered Species Act of 1973Canadian Journal of Fisheries and Aquatic Sciences, 38
R. Waples (1987)
A MULTISPECIES APPROACH TO THE ANALYSIS OF GENE FLOW IN MARINE SHORE FISHESEvolution, 41
N. Ryman, L. Laikre (1991)
Effects of Supportive Breeding on the Genetically Effective Population SizeConservation Biology, 5
R. Lande, G. Barrowclough (1987)
Viable Populations for Conservation: Effective population size, genetic variation, and their use in population management
M. Slatkin (1987)
Gene flow and the geographic structure of natural populations.Science, 236 4803
U. Gyllensten (1985)
The genetic structure of fish: differences in the intraspecific distribution of biochemical genetic variation between marine, anadromous, and freshwater speciesJournal of Fish Biology, 26
This paper discusses three aspects of genetic conservation relating to fishery management and fish culture, namely (1) the goal for conservation (what to conserve), (2) a guideline for assessing acceptable levels of gene flow among populations. and (3) the effect on the genetically effective population size resulting from stock enhancement. Goal for conservation: The goal for genetic conservation is to maintain genetic variability between and within populations. It has been suggested recently, as an alternative to that goal, that in the context of fisheries management conservation should strive at maintaining the variance or the distribution of fitness. The characteristics of this model are discussed from the perspective of population genetics. It is concluded that although the fitness approach may appear attractive it is not compatible with the more general objective of maintaining genetic diversity between and within populations. Acceptable levels of gene, flow: A tension exists between the need for protection of natural fish populations and the rapidly expanding levels of aquaculture causing increased migration into those populations. Guidelines are needed for assessing levels of introgression that are acceptable in the context of genetic conservation. To avoid unrealistically restrictive recommendations it is suggested that acceptable levels of introgression are related to those occurring naturally. It is argued that assessments of acceptable levels of introgression should be made on the basis of spontaneously occurring gene flow estimated from genetic data using parameters such as Fst or similar ones. Stock enhancement and effective size: In the context of genetic conservation previously published recommendations on stocking have focussed on the need to identify the genetic structure within the region in question to ensure that the appropriate population is targeted for propagation and release. There is, however, an additional aspect that appears to have been largely unrecognized: the reduction of the genetically effective size of the total population that may result from breeding‐release programmes aimed at supporting wild stocks. The details of this problem are introduced and discussed.
Journal of Fish Biology – Wiley
Published: Dec 1, 1991
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.