Nghiên cứu này được thực hiện nhằm đánh giá ảnh hưởng của thức ăn, độ mặn đến hiệu quả sinh sản của ngán bố mẹ Austriella corrugata trong điều kiện nuôi vỗ. Hiệu quả sinh sản của ngán bố mẹ được đánh giá thông qua các chỉ tiêu về tỷ lệ sống, tỷ lệ thành thục, tỷ lệ sinh sản, sức sinh sản thực tế, tỷ lệ thụ tinh của trứng, tỷ lệ sinh sản hiệu quả (100*ấu trùng chữ D/trứng thụ tinh), chất lượng của ấu trùng | Vietnam Journal of Marine Science and Technology Vol. 19 No. 1 2019 115 125 DOI https 1859-3097 19 1 9256 https jmst Effects of dietary salinity on the reproductive efficiency of mud clam broodstock Austriella corrugata in maturing condition Nguyen Xuan Thanh1 Luc Van Long2 Tran Thi Thu Trang1 Pham Quoc Hung3 1 Institute of Marine Environment and Resources VAST Vietnam 2 Quang Ninh Centre for Fishery Seed Production and Science Technology Quang Ninh Vietnam 3 Nha Trang University Khanh Hoa Vietnam E-mail thanhnx@ Received 26 April 2017 Accepted 30 December 2017 2019 Vietnam Academy of Science and Technology VAST Abstract 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 gt while that in the 18 salinity experienced the least p lt . 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. Keywords Austriella corrugata dietary salinity mud clam reproductive efficiency. Citation Nguyen Xuan Thanh Luc Van Long Tran Thi Thu Trang Pham Quoc Hung 2019. Effects of dietary salinity on the .
