Article (Scientific journals)
A comparative study of sexual product quality in F1 hybrids of the bream Abramis brama X the silver bream Blicca bjoerkna
Nzau Matondo, Billy; Ovidio, Michaël; Philippart, Jean-Claude et al.
2012In Fisheries Science, 78, p. 1173-1178
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Keywords :
Semen; Eggs; Quality; Hybrids; Breams; Fish
Abstract :
[en] The gonadosomatic index at spawning, absolute fecundity, and egg size for the female sexual products as well as the density and consistency of semen for the male sexual products were examined in cultured Abramis brama 9 Blicca bjoerkna F1 hybrids and compared with the parental species at their first sexual maturity. Females ovulated under environmental conditions, and their eggs were weighed, counted and measured. Semen of males was macroscopically examined and spermatozoa counted using a hemocytometer. Results revealed that hybridization affected the quality of female and male gametes but with an overlap between hybrids and parents. The gonadosomatic index and fecundity were significantly lower than those of parental species. Egg sizes in hybrids showed a parental effect but to the benefit of hybrids. Semen of hybrids was more diluted which was classified into two groups: the white semen overlapping slightly with parents and the aqueous without any overlap with parents. Overlapped areas between hybrids and parents in term of quality of sexual products could translate that females and males of these hybrids have the biological capacity to produce high quality gametes and thus, a greater chance to produce F2 and backcross generations in rivers.
Research Center/Unit :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Zoology
Author, co-author :
Nzau Matondo, Billy  ;  Université de Liège - ULiège > Laboratoire de Démographie des Poissons et d'Hydroécologie (LDPH)
Ovidio, Michaël  ;  Université de Liège - ULiège > Laboratoire de Démographie des Poissons et d'Hydroécologie (LDPH)
Philippart, Jean-Claude ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Biologie du comportement - Ethologie et psychologie animale
Poncin, Pascal ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
A comparative study of sexual product quality in F1 hybrids of the bream Abramis brama X the silver bream Blicca bjoerkna
Publication date :
October 2012
Journal title :
Fisheries Science
ISSN :
0919-9268
eISSN :
1444-2906
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
78
Pages :
1173-1178
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 October 2012

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