Open AccessẢNH HƯỞNG CỦA ĐỘ MẶN ĐẾN HIỆU QUẢ SINH SẢN CỦA NGÁN BỐ MẸ (AUSTRIELLA CORRUGATA) TRONG ĐIỀU KIỆN NUÔI VỖ
Author(s) -
Nguyen Xuan Thanh,
Luc Van Long,
Trần Thị Thu Trang,
Pham Quoc Hung
Publication year - 2019
Publication title -
vietnam journal of marine science and technology/vietnam journal of marine science and technology (vietnam academy of science and technology)
Language(s) - English
Resource type - Journals
ISSN - 1859-3097
DOI - 10.15625/1859-3097/19/1/9256
Subject(s) - broodstock , salinity , biology , fecundity , hatchery , fishery , zoology , human fertilization , aquaculture , ecology , fish <actinopterygii> , agronomy , population , demography , sociology
This study was conducted to evaluate the effect of dietary, salinity on the reproductive efficiency of mud clam broodstock (Austriella corrugata) in the maturing condition. The reproductive efficiency was assessed by survival rate, maturation rate, actual fecundity, spawning rate, fertilization rate, reproductive efficiency rate (100*D-veliger/fertilized eggs), larval quality. The experiment was held in the five dietaries and three salinities (18‰, 23‰ and 28‰). Three replicates were carried out for each treatment. Results showed that the reproductive efficiency of using fresh algae complex in 28‰ salinity was the highest and the larvae are in good quality, followed by that in the 23‰ salinity but having no statistically significant difference ( p > 0.05) while that in the 18‰ salinity experienced the least (p < 0.05). This study on dietary, salinity suggests that fresh algae complex in the salinity of 28 ± 1‰ is suitable for maturing broodstock of mud clam. These findings will contribute to building up hatchery production techniques as well as helping protection of natural stock and developing sustainable mud clam resource.