Inbreeding and brood stock management
This manual, written for extension workers, aquaculturists, and those who work with natural resource management programmes, primarily deals with the problems caused by unwanted inbreeding in cultured fish populations and describes management techniques that can be used to prevent or minimize inbreeding. The manual also describes how inbreeding can be used to improve captive populations of fish. The manual contains chapters on: basic genetics and the genetics of inbreeding; how to determine individual inbreeding values when pedigrees are known; how to determine the average inbreeding value in a population when pedigrees are not known; genetic drift, which is random changes in gene frequency; how inbreeding programmes can be used to improve cultured populations of food fish; how to prevent inbreeding depression and loss of genetic variance in farmed populations; and recommendations on how to manage cultured populations of fish to prevent unwanted inbreeding and genetic drift from depressing productivity, profits, and survival. One of the most important aspects of managing a closed population of fish at a fish farm or fish culture station is the management of the population's effective breeding number, because inbreeding is inversely related to the effective breeding number. Techniques to determine and manage the effective breeding number are described, and recommended minimum effective breeding numbers are provided for a variety of farm sizes and fish culture goals. A number of culture techniques can affect inbreeding, and ways to modify them so there is minimal impact on inbreeding are discussed. Finally, ways to minimize inbreeding during selective breeding programmes are described.
| Main Authors: | , |
|---|---|
| Format: | Texto biblioteca |
| Language: | |
| Published: |
Rome (Italy) FAO
1999
|
| Subjects: | AQUACULTURE, INBREEDING, BREEDING STOCK, GENETIC VARIATION, CHROMOSOME MANIPULATION, INLAND FISHERIES, GERMPLASM CONSERVATION, PECHE CONTINENTALE, CONSERVATION DU MATERIEL GENETIQUE, ANIMAL REPRODUCTEUR, VARIATION GENETIQUE, MANIPULATION CHROMOSOMIQUE, PESCA CONTINENTAL, CONSERVACION DEL GERMOPLASMA, ACUICULTURA, ENDOGAMIA, ANIMAL REPRODUCTOR, VARIACION GENETICA, MANIPULACION DE CROMOSOMAS, |
| Online Access: | http://www.fao.org/3/x3840e/X3840E.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | This manual, written for extension workers, aquaculturists, and those who work with natural resource management programmes, primarily deals with the problems caused by unwanted inbreeding in cultured fish populations and describes management techniques that can be used to prevent or minimize inbreeding. The manual also describes how inbreeding can be used to improve captive populations of fish. The manual contains chapters on: basic genetics and the genetics of inbreeding; how to determine individual inbreeding values when pedigrees are known; how to determine the average inbreeding value in a population when pedigrees are not known; genetic drift, which is random changes in gene frequency; how inbreeding programmes can be used to improve cultured populations of food fish; how to prevent inbreeding depression and loss of genetic variance in farmed populations; and recommendations on how to manage cultured populations of fish to prevent unwanted inbreeding and genetic drift from depressing productivity, profits, and survival. One of the most important aspects of managing a closed population of fish at a fish farm or fish culture station is the management of the population's effective breeding number, because inbreeding is inversely related to the effective breeding number. Techniques to determine and manage the effective breeding number are described, and recommended minimum effective breeding numbers are provided for a variety of farm sizes and fish culture goals. A number of culture techniques can affect inbreeding, and ways to modify them so there is minimal impact on inbreeding are discussed. Finally, ways to minimize inbreeding during selective breeding programmes are described. |
|---|