The invention relates to a large-scale propagation method of the river sand ganchanna based on timely temperature control. The specific operation steps are as follows: (1) in the pre production culture of parent fish, Elodea was transplanted in the parent fish culture pool, Chinese baby shrimp was put in, and at the same time, the parent of river sand ganchanna was put in according to the ratio of male and female, (2) the environment was built, and the fresh snails were put in to purify the water quality; (3) the artificial spawning nest was set, and the tubular artificial ovaries were formed by binding two circular green tiles; (4) the artificial acceleration was carried out During labor, it is found that there are eggs stuck in the artificial ovary, the water in the pool is drained, the parent fish is caught, the spawning pool is set up, and oxytocin is injected to the parent fish; (5) temperature control incubation is carried out in time, the embryo develops to the stage of neuroembryo, and transferred to the indoor temperature control incubation in time. The method reduces the adverse effect of environmental stress on embryo development in the early stage of hatching of fertilized eggs; compared with the whole process of temperature controlled hatching, the method can save energy and reduce consumption by 73%, reduce deformity rate by 8%, improve hatching rate of fertilized eggs by 11%, and shorten 5-7 days compared with normal temperature hatching.
【技术实现步骤摘要】
一种基于适时控温的河川沙塘鳢规模化高效繁殖方法
本专利技术属于水产养殖
,涉及一种河川沙塘鳢繁殖方法,具体涉及一种基于适时控温的河川沙塘鳢规模化高效繁殖方法。
技术介绍
河川沙塘鳢(OdontobutispotamophilaGünther),隶属鲈形目、塘鳢科、沙塘鳢属,俗称“虎头鲨”、“呆子鱼”、“土步鱼”,分布于中国长江中下游及其支流、钱塘江水系和闽江水系等,为中国特有种。因其肉味鲜美、营养价值和药用价值高而备受青睐,尤其是2010年上海世博会上被誉为“世博第一菜”后,更是名声大噪,其售价也不断攀升,上海、杭州地区最高可达150~200元/千克。目前,河川沙塘鳢商品鱼主要来自天然水体捕捞和池塘人工增殖,随着河川沙塘鳢苗种人工繁殖和养殖技术研究与实践的不断深入,相应的技术专利技术也相继面世。现阶段,河川沙塘鳢规模化繁殖中的难点和主要问题有:一、自然产卵时间过于分散,完全仿生态繁殖效率低。即便同一地区同池培育的亲本产卵时间也要持续一月有余,且产卵受气候条件影响大。二、受精卵孵化时间过长,无亲鱼护卵情况下孵化率低。人工繁殖条件下,自然水体孵化水温低,受精卵孵化出膜时间一般在20天~30天,水霉发生几率大,由于河川沙塘鳢为巢穴产卵,卵粒分布较为集中,一旦局部感染水霉会蔓延周边正常发育胚胎造成连片坏死,甚至全军覆没。如采用受精卵全程控温流水孵化,虽可缩短孵化周期,减少水霉发生,但全程控温能耗大、成本高,且由于河川沙塘鳢胚胎发育初期对环境较为敏感,易出现胚胎发育畸形、孵化率不高等问题。专利技术 ...
【技术保护点】
1.一种基于适时控温的河川沙塘鳢规模化繁殖方法,其特征在于操作步骤如下:/n(1)亲鱼产前培育/n12月至翌年2月,在水深15cm~20cm的亲鱼培育池中移植伊乐藻,半个月后,注水至水深50cm~60cm,每667m
【技术特征摘要】
20181120 CN 20181138338821.一种基于适时控温的河川沙塘鳢规模化繁殖方法,其特征在于操作步骤如下:
(1)亲鱼产前培育
12月至翌年2月,在水深15cm~20cm的亲鱼培育池中移植伊乐藻,半个月后,注水至水深50cm~60cm,每667m2投放35kg~45kg饵料虾,同时按雌雄比1:1.1~1.2投放75kg~100kg河川沙塘鳢亲本,其中雌鱼个体重35g~45g,雄鱼个体重60g~75g;
(2)环境营造
3月下旬,向亲鱼培育池内投放螺蛳,以净化水质;
(3)设置人工产卵巢
4月初,在亲鱼培育池中设置3~5个人工产卵巢,每日检查人工产卵巢内有无卵粒附着;
待发现人工产卵巢内粘有卵粒时,及时抽干池水,起捕亲鱼并将亲鱼暂时养殖于网箱中;接着按1个/m2人工产卵巢的量将人工产卵巢均布在池塘四周形成产卵池,且均悬置于距池底10~12cm处;给产卵池注水,水位恢复至原位;
(4)人工催产
捞起亲鱼,采用胸鳍基部注射法注射催产素,每kg雌鱼按垂体(PG)8mg+地欧酮(DOM)12mg+维生素C(Vc)300mg进行注射,雄鱼减半;将注射催产素的亲鱼放回产卵池,48h~60h后,亲鱼开始产卵;
(5)适时控温孵化
定期观察受精卵发育情况,当观察到胚胎发育至神经胚阶段,及时将附着卵粒的人工产卵巢移入室内孵化池中,孵化池的水深为30cm~40cm、流速为0...
【专利技术属性】
技术研发人员:凌俊,江河,段国庆,胡玉婷,潘庭双,周华兴,陈小雷,汪焕,
申请(专利权)人:安徽省农业科学院水产研究所,
类型:发明
国别省市:安徽;34
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