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저수온기 및 고수온기에 있어서 배합사료를 공급한 넙치(Paralichthys olivaceus) 치어의 적정 공급율
김강웅,황남용,손맹현,김경덕,이준호,유의,윤용현,박건현,김성삼,이경준,배승철 한국수산과학회 2011 한국수산과학회지 Vol.44 No.4
Two feeding trials were conducted to investigate the optimum feeding rates in juvenile olive founder Paralichthys olivaceus fed practical expanded pellet(EP) containing 58.1% crude protein, 10.7% crude lipid, and 10.8% ash at low and high water temperatures. In the first experiment, triplicate groups of 15 fish with average weight of 7.7 g were fed at one of seven feeding rates(0, 1, 1.5, 2, 2.25, or 2.5% of body weight/day or to satiation) for 4 weeks at low water temperature. In the second experiment, quadruplicate groups of 20 fish with average weight of 5.5 g were fed at one of eight feeding rates(0, 3, 3.5, 4, 4.25, 4.5, or 4.75% of body weight/day or to satiation) for 4 weeks at high water temperature. Based on growth performance, we estimated that the optimum feeding rates for juvenile olive flounder were 1.97-2.51% and 4.82-6.36% of body weight/day at low and high water temperatures, respectively.
부세(Larimichthys crocea)의 수정란 및 종자생산 연구
박충열,송지훈,황남용,양사랑,양석우,박준택 한국수산해양기술학회 2022 수산해양기술연구 Vol.58 No.3
The experimental fish transplanted from China in 2015 was used after seedling production and cultivated. Breeding management for experiment was carried out from October 2020 to February 2021. Also, it succeeded in inducing artificial maturation three to four months earlier than wild broodstock and secured good quality fertilized eggs. The average size of fertilized eggs was 1.22 mm, at 20℃ Blastodisc (15 minutes post-fertilization), 2 cell (50 minutes), 4 cell (1 hours), 8 cell (2 hours), 16 cell (2 hours and 30 minutes), 32 cell (2 hours and 50 minutes), morula (3 hours), blastula (8 hours), gastrula (15 hours), skull formation (20 hours), organ formation (30 hours) and hatching yolk larvae stage (35 hours). The total length of the just hatched larvae were 2.50 ± 2 mm, and then gain growth of 42.5 mm by 60 days, reaching 45 ± 5 mm. 본 연구는 2020년 10월부터 2021년 5월까지 부세양 식의 기초가 되는 산란, 초기발생 및 성장에 관하여 조사 하였다. 5개월간 친어 성숙관리을 실시하여 GSI가 10~20의 높은 수치를 기록하였고, 자연산 친어 보다 3~4개월 빠른 인공적인 성성숙 유도에 성공하여 양질의 수정란을 확보하였다. 수정란은 36~60시간 만에 자어로 부화하였고, 2.5±0.2 mm의 전장을 나타냈으며, 이후 60 일 동안 먹이관리를 통해 45±5 mm로 성장하였다. 이번 연구를 통해 우리나라에서도 부세양식이 가능하다는 것이 입증되었고, 후속 연구를 통해 육상 및 가두리 에서 생산성 향상을 위한 적절한 양식 방법이 확립되어야 할 것이다. 뿐만 아니라, 전용사료 개발, 질병관리, 유전적 다양성 유지 등과 같은 추가적인 기반 연구가 수반되어야 할 것이며, 인공종자생산 시 친어 성숙에 관련된 수온, 광주기, 먹이 등 세부적인 연구도 추가로 진행되어야 할 것으로 사료된다. 부세 양식기술을 정량 화 하여 단기간 양성 방법을 구명하고, 대형어 생산기술 을 연구하여 중국에서 인기 있는 대형 부세를 역수출 하는 방법도 강구할 필요성이 있다고 판단된다.
대맛조개 (Solen grandis) 의 수정란 발생과 유생 성장
최보현,이동근,박충국,황남용,안신홍,강요한,고경동,이지수,이경식,박준택,이경우 한국패류학회 2022 The Korean Journal of Malacology Vol.38 No.4
Solen grandis is an industrially important edible bivalve that is traded at high prices as it is unfarmed and the production has decreased due to environmental pollution and overfishing. Major studies on Solen grandis have reported only basic research on reproductive development, change, etc., and no studies on spawning, egg development, and larval management have been reported for seed production and aquaculture technology development. Therefore, in this study, spawning was carried out using mature plaques secured through habitat survey for Solen grandis seed acid, and artificial seed production was succeeded, and the egg development process from fertilized egg to D phase larva and larval development process of 1 mm or more were observed through a microscope. Additionally, this study aims to develop technology for promoting seed production as basic research for fostering high value-added bivalve industrial varieties and resource recovery. Based on the existing research data, we conducted research on the development of fertilized eggs and larval development using the mature plaques of Solen grandis.