Synopsis
Bluesac disease is one of the major causes of post-hatching embryo mortality in salmonids. The incidence of bluesac is strongly inherited in splake (Salvelinus fontinalis × S. namaycush hybrid) under hatchery conditions. Lake charr, F2 splake, F6 splake, and lake charr backcrosses of F6 splake had incidences of 7%, 23%, 5% and 40% respectively. For the backcrosses, which are of practical interest because they are used for experimental plantings in the Great Lakes and northern Ontario inland lakes, the variation among families in the incidence of bluesac is primarily determined by the splake parent. Hence the incidence of bluesac disease in the progeny of splake and lake chair is considered to be a character of the splake parent. The heritability of this character in the splake is about 0.74. The level of bluesac in the backcrosses can, therefore, be significantly reduced in one generation by selecting as breeders those splake that produce low levels of bluesac in test backcrosses to lake charr.
Similar content being viewed by others
References cited
Atkinson, N.J. 1932. A bacterial disease of trout eggs and fry and its prophylaxis with acriflavine. Trans. Am. Fish. Soc. 15: 229–250.
Ayles, G.B. 1972. The inheritance of early survival in Salvelinus namaycush × S. fontinalis hybrids (splake trout). Ph. D. Thesis. Univ. Toronto, Toronto. 173 pp.
Ayles G.B. 1974. Relative importance of additive genetic and maternal sources of variation in early survival of young splake hybrids (Salvelinus fontinalis × S. namaycush). J. Fish. Res. Board Can. 31: 1499–1502.
Becker, W.A. 1967. Manual of procedures in quantitative genetics. Washington State Univ. Press, Pullman, Wash. 130 pp.
Dietrich, E. 1939. Die Hydrocoele Embryonalis (Dotterblasenwassersueht) der Salmoniden. Zeitschrift für Fischerei 36: 605–642.
Falconer. D.S. 1960. Introduction to quantitative genetics. Oliver and Boyd. 365 pp.
Snedecor G.W. & W.G. Cochran 1967. Statistical methods. 6th ed. Iowa State Univ. Press, Ames Iowa. 593 pp.
Tait J.S. 1970. A method of selecting trout hybrids (Salvelinus fontinalis × S. namaycush) for ability to retain swimbladder gas. J. Fish. Res. Board Can. 27: 39–45.
Wolf, K. 1957. Experimental induction of blue-sac disease. Trans Am. Fish. Soc. 86: 61–70.
Wolf, K. 1969. Blue-sac disease of fish. United States Department of the Interior. Fishery Leaflet FDL-15 February 1969. 4 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ihssen, P. Inheritance of bluesac disease for hatchery charr of the genus Salvelinus . Environ Biol Fish 3, 317–320 (1978). https://doi.org/10.1007/BF00001459
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00001459