Effects of LHRHa treatments upon the timing of ovulation and upon egg and offspring quality in Arctic charr, Salvelinus alpinus (L.)

H. HARALDSSON*, T. SVEINSSON, S. SKÚLASON

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Abstract Five groups of Arctic charr, Salvelinus alpinus (L.), were studied, each group consisting of 13 females. The fish in four of the groups received a single intramuscular (IM) injection: three groups were injected with LHRHa in various forms and dosages, and one was injected with saline (control). The females in the fifth group were implanted with controlled‐diffusion implants containing LHRH analogue. Ovulation in two of the treatment groups (30μg/kg D‐Ala6 LHRH and 150μg/kg D‐Trp6 LHRH) occurred earlier, and was better synchronized, than in the control group. The treatments did not significantly affect (1) the weight of eggs released from each female; (2) egg size, weight, or chemical composition; (3) mortality rates; (4) hatching times or the length of alevins. The fertilization rate in one of the treatment groups (150 μg/kg D‐Trp6) was significantly lower than in the control group.

Original languageEnglish
Pages (from-to)145-150
Number of pages6
JournalAquaculture Research
Volume24
Issue number2
DOIs
Publication statusPublished - Mar 1993

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