| Do the genetically distinct common carp populations show different reproductive indices? |
| Paper ID : 1109-ICIAQUA |
| Authors |
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Samira Nazemroaya *1, Seyed Abdolsaheb Mortezavizadeh2, Ayeh Sadat Sadr2, Mohammad Youneszadeh Feshalami2, Fatemeh Hekmatpour2, Hossein Houshmand3, Mina Ahangarzadeh2, Farahnaz Kianersi2 1South Iran Aquaculture Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran 2South of Iran Aquaculture Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran 3South of Iran Aquaculture Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organization, Ahvaz, Iran. |
| Abstract |
| This study aimed to compare reproductive indices of broodstocks between genetically different populations of gathered live common carp (Cyprinus carpio) gene bank, TATA (Hungarian-originated), Iranian, and RAN (China-originated), in South Iran Aquaculture Research Institute. The genetic variation leading to distinguish these populations were achieved by GBS analysis in previous study, showing highest genetic distance between RAN and those two population. Sperm quality, including spermatocrit, sperm density per milliliter, percentage of motile sperm, and motility duration, were assayed to evaluate male and working and relative fecundity, egg diameter, fertilization, and hatching rates, and larval size prior to stocking and female reproductive indices, respectively. The results showed that, despite the lowest sperm volume, sperm density per milliliter, and percentage of spermatocrit in RAN, it had the highest motile sperm percentage and the motility duration, which resulted in the most elevated fertilization rate (p<0.05). Egg diameter did not differ meaningfully in populations (p>0.05). Lowest hatching rate belonged to Iranian population (p<0.05). The highest larval survival rate 24 hours post-hatching was observed in RAN, and the lowest one in TATA and Iranian populations (p<0.05). RAN population gained the highest larval survival rate 72 hours after hatching, although it did not differ significantly with the Iranian and TATA (p>0.05) populations. The larval size prior to pond stocking in TATA and Iranian populations is significantly smaller than RAN (p<0.05). The finding indicated that RAN and Iranian populations performed satisfactorily in male and female reproductive indices, respectively. It is worth to consider hybridization between the two populations in future studies. |
| Keywords |
| Breeding, Broodstocks, Reproduction, Fecundity, Egg, Sperm |
| Status: Abstract Accepted (Oral Presentation) |