| Autor: |
James W. Treasurer, Carol Cox |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Aquaculture. 275:51-57 |
| ISSN: |
0044-8486 |
| DOI: |
10.1016/j.aquaculture.2008.01.006 |
| Popis: |
Intra-abdominal adhesions resulting from ip vaccination affect ovaries and may have an impact on broodstock fecundity and egg quality. The effects of ip and dms vaccination on reproductive success and immune protection in Salmo salar were compared. Cumulative mortalities for 12–16 weeks post vaccination were 1–5% in range for ip vaccinated fish and 0.5–1% in dms fish. Growth of vaccinated fish in both groups dipped for 3 to 6 weeks post vaccination but pre transfer growth did not differ. Vaccine induced lesions from ip vaccination were mild and did not affect oocyte development, with mean score values from 0.95–1.03 and melanin deposition of 1.5–1.7. High antibody titres to A. salmonicida ssp salmonicida were present in all fish 16 weeks after vaccination by either the dms or ip route. In bacterial challenge rps was over 98% and there was no significant difference in immune protection with dms or ip vaccination. Broodstock vaccinated ip showed minor grade adhesions affecting the ovary on spawning but residual eggs were stripped easily by hand. A mean gonadosomatic index of 38.8% was higher in the ip vaccinated fish as was relative fecundity at 1999 eggs kg− 1. The percentage of normal viable eggs at 180 degree days development did not differ between vaccination routes at 70% in dms and 68% in ip fish respectively. It is concluded that, although ovaries of ip vaccinated fish displayed adhesions, egg production and viability were not affected. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect