Comparing propagation potential of marine and cultured broodstocks of Fenneropenaeus indicus in Hormozgan Province
The propagation of marine and cultured broodstocks of Fenneropenaeus indicus were compared in 2003 in the center for training and stock enhancement in Kolahi port south of Iran. We used a factorial design to assess relative fecundity, percent of fertilization and hatching, number of nauplii, time of hatch, growth and survival rate in zoae, mysis, and PL. We also measured total weight and length of PL12. In this investigation 30 marine and 30 cultured broodstocks in their second stage of maturation were used in three replications, each including 10 marine and 10 cultured broodstocks. Induction of maturation was performed by ablation of eye stalk. After one week, 3 marine and 3 cultured broodstocks which were in their fourth stage of maturation were selected from each replication and were transferred to the spawning tanks. The offspring of each broodstock was reared separately till PL and the mentioned parameters were measured for each broodstock. Dunkan's mean test showed that the marine broodstocks produced nauplii more than the cultured broodstocks and the weight of the post larvae produced by marine broodstocks was more than that of the cultured broodstocks (P<0.05). However, cultured broodstocks had higher relative fecundity and growth rate in mysis and PL than marine broodstocks (P<0.05). The marine broodstocks were better than cultured broodstocks for some of the quantitative parameters, but there was no significant difference between the stocks in terms of the qualitative parameters.
| Main Authors: | , , , , |
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| Format: | article biblioteca |
| Language: | Persian |
| Published: |
2009
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| Subjects: | Aquaculture, Fenneropenaeus indicus, Marine Broodstocks, Culture Broodstocks, Propagation, Hormuzgan province, Iran, |
| Online Access: | http://hdl.handle.net/1834/38476 |
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| Summary: | The propagation of marine and cultured broodstocks of Fenneropenaeus indicus were compared in 2003 in the center for training and stock enhancement in Kolahi port south of Iran. We used a factorial design to assess relative fecundity, percent of fertilization and hatching, number of nauplii, time of hatch, growth and survival rate in zoae, mysis, and PL. We also measured total weight and length of PL12. In this investigation 30 marine and 30 cultured broodstocks in their second stage of maturation were used in three replications, each including 10 marine and 10 cultured broodstocks. Induction of maturation was performed by ablation of eye stalk. After one week, 3 marine and 3 cultured broodstocks which were in their fourth stage of maturation were selected from each replication and were transferred to the spawning tanks. The offspring of each broodstock was reared separately till PL and the mentioned parameters were measured for each broodstock. Dunkan's mean test showed that the marine broodstocks produced nauplii more than the cultured broodstocks and the weight of the post larvae produced by marine broodstocks was more than that of the cultured broodstocks (P<0.05). However, cultured broodstocks had higher relative fecundity and growth rate in mysis and PL than marine broodstocks (P<0.05). The marine broodstocks were better than cultured broodstocks for some of the quantitative parameters, but there was no significant difference between the stocks in terms of the qualitative parameters. |
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