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Survival, growth, sexual maturation and reproduction of brook charr, Salvelinus fontinalis (Mitchill), Arctic charr, Salvelinus alpinus L., and their hybrids
Survival, growth, sexual maturation and reproduction of brook charr, Salvelinus fontinalis (Mitchill), Arctic charr, Salvelinus alpinus L., and their hybrids
- Source :
- Aquaculture Research, Aquaculture Research, Wiley, 1996, 27 (4), pp.245-253
- Publication Year :
- 1996
- Publisher :
- HAL CCSD, 1996.
-
Abstract
- Survival of hybrids (FA, AF) between brook charr, Salvelinus fontinalis (Mitchill), (FF) and Arctic charr, Salvelinus alpinus L., (AA) were compared at three fish farms. Survival of hybrids and Arctic charr was impaired in warm water. In cold water, brook charr and hybrids showed similar survival percentages until the spawning period. Each spawning period was followed by an increase of mortality, but to a much higher degree in brook charr. Growth was studied in the best (cold water) fish farm. During the first 2 years of rearing, brook charr had the highest relative weight. The weight of the two hybrids approached that of brook charr in the third year because of the drastic decrease of growth rate in brook charr after the spawning period. No differences between genotypes of either females or males could be detected in the eviscerated weights, the dressing percentages, or the gonado-somatic indexes. The two hybrids matured sexually, but their sperm quality was inferior to that of the pure species. Crosses between the 4-year-old breeders from the F1 population (FF, FA, AF and AA) were achieved. Survival from the eyed stage to 6 weeks post-hatching was significantly lower in F2 progeny than in back-crosses or pure species crosses. Even though the survival following spawning periods and the total biomass produced were better in hybrids than in brook charr raised in cold water, we believe the farming of this hybrid should not be carried out. The full development of sexually mature hybrids does not resolve problems linked with precocious sexual maturation in brook charr farming carried out in eastern Canada.
- Subjects :
- media_common.quotation_subject
Fish farming
[SDV]Life Sciences [q-bio]
Population
Zoology
Aquatic Science
03 medical and health sciences
Sexual maturity
education
ComputingMilieux_MISCELLANEOUS
030304 developmental biology
media_common
Hybrid
Salvelinus
0303 health sciences
education.field_of_study
biology
Ecology
04 agricultural and veterinary sciences
GENETIQUE
biology.organism_classification
[SDV] Life Sciences [q-bio]
Fontinalis
Arctic
040102 fisheries
0401 agriculture, forestry, and fisheries
OMBLE DE FONTAINE
Reproduction
Subjects
Details
- Language :
- English
- ISSN :
- 1355557X and 13652109
- Database :
- OpenAIRE
- Journal :
- Aquaculture Research, Aquaculture Research, Wiley, 1996, 27 (4), pp.245-253
- Accession number :
- edsair.doi.dedup.....dbe6272cc37be321db093fbe3eee20d6