CN112970634A - 一种小丑鱼鱼菜共生循环水繁育方法 - Google Patents
一种小丑鱼鱼菜共生循环水繁育方法 Download PDFInfo
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- CN112970634A CN112970634A CN202110159335.8A CN202110159335A CN112970634A CN 112970634 A CN112970634 A CN 112970634A CN 202110159335 A CN202110159335 A CN 202110159335A CN 112970634 A CN112970634 A CN 112970634A
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Abstract
本发明提供一种小丑鱼鱼菜共生循环水繁育方法,所述的方法包括:1)养水、2)种藻:3)繁育小丑鱼等步骤,既可以稳定生产,又可为循环水繁育***提供净化;藻缸内供海藻攀附的基质采用陶瓷环而不是海沙,有效扩大了培菌体积,同时在满足海藻须根攀附的基础上对水流循环没有任何阻碍,而且也不容易蓄积污染物。本发明充分满足了小丑鱼和海洋观赏藻类的生态需求,有效实现了立体混合繁育和养殖,增加了繁育和养殖的经济效益;同时小丑鱼的残饵与粪便被藻类作为营养有效吸收,提供了水质净化,使养殖水体的物质和能量平衡处于一种动态的平衡状态。
Description
技术领域
本发明属于水产养殖技术领域,具体涉及一种小丑鱼鱼菜共生循环水繁育方法。
背景技术
小丑鱼(Amphiprioninae)属于鲈形目雀鲷科海葵亚科,因为通常体侧有白色条纹,好似京剧中的丑角而得名,是一种热带珊瑚礁鱼类。已知自然种类有28种,一种来自棘颊雀鲷属(Premnas),其余来自双锯鱼属(Amphiprion)。小丑鱼在自然界中与海葵有着密不可分的共生关系,因此又称海葵鱼。
常见的小丑鱼有公子小丑鱼(amphiprion ocellaris)、红小丑鱼(Amphiprionfrenatus)、黑双带小丑鱼(amphiprion sebae)、透红小丑鱼(Premnas biaculeatus)、黑豹小丑鱼(Amphiprion latezonatus)等,多分布在印度洋、西太平洋的礁岩海域,形状怪异,体色多变,自然界中小丑鱼将海葵当作具有防御功能的居住地,而小丑又吸引其它鱼类靠近,增加海葵的捕食机会,所以小丑又被称为“海葵鱼”,小丑鱼同海葵是典型的共生关系,杂食性。
随着生活水平的提升,海水水族生物作为细分市场在水族市场中的比重越来越大,小丑鱼作为明星品种受到越来越多水族爱好者的喜爱。
野生小丑鱼经过一定的驯化均可以人工养殖,驯化半年至一年以上性腺发育成熟之后可以人工繁殖,而且不同品种的小丑鱼是可以进行杂交繁育的。目前市面上出现的毕加索、金砖、黑冰、熊猫、达芬奇等品种均是驯化改良后的人工品种。人工繁育小丑鱼群体对人工养殖环境的适应能力更强,成活率更高,在水族市场上供不应求,也对野生资源起到了一定的替代保护的作用。
而且,随着野生自然资源的下降和世界范围内对海洋生物资源的保护,采捕野生小丑鱼资源的成本会越来越高,人工繁育养殖小丑鱼是大势所趋。
循环水养殖是水产养殖诸多模式中工业化程度最高的一种生产模式,它通过建立污水处理设施,使养殖污水经过适当处理,又回到养殖水池中,循环使用。它与流水型养殖模式相比,可节水90%以上,节地高达99%,是未来水产养殖的发展方向。循环水养殖模式能减少养殖过程中对周边水环境依赖,对水产养殖业健康和可持续发展具有重要意义。
发明内容
本发明目的是提供一种小丑鱼与海洋观赏藻类鱼菜共生循环水繁育方法,从而弥补现有技术的不足。
本发明提供一种小丑鱼鱼菜共生循环水繁育方法,所述的方法包括如下的步骤:
1)养水:
在共生循环***中注入新鲜消毒的盐度为28~32的海水,开启水泵与蛋白分离器,打开紫外杀菌灯,控制水温22~26℃,盐度28~32,不间断循环后,往滤材仓中接种净化菌株和营养液来培养生物膜,至水体中NH4 +-N浓度<1.0mg/L,NO2 --N<0.1mg/L完成养水阶段;
所述的净化菌株为硝化杆菌和枯草芽孢杆菌的混合菌株,作为实施例的一种具体记载,其中硝化杆菌和枯草芽孢杆菌的数量比为1:2;
所述的营养液为添加了黏土和沸石粉的NH4 +-N溶液;
所述的NH4 +-N溶液为40mg/l的氯化铵溶液;
2)种藻:将陶瓷环清洗消毒,环孔朝上均匀的平铺在藻缸内;另取陶瓷环,将藻类的须根或匍匐茎穿过陶瓷环;将附着藻体的陶瓷环均匀铺设在养殖缸内平铺的陶瓷环之间进行养藻;
所述的藻类种植密度为25~35g/m2;水质指标为:水温22~26℃,盐度28~32,pH7.5~8.2,光照强度3000~4000lx。
所述的藻类,为葡萄藻、杉叶蕨藻、羽毛藻、鹿角藻、红葡萄藻、红千层或火焰藻;
3)繁育小丑鱼:规格雌性6-10cm,雄性4-5cm,体色正常、健康无损伤、活力充沛的小丑鱼作为亲鱼,投入养殖缸中,小丑鱼会自由活动,观察其行为,如果小丑鱼有争斗现象,说明两条均为雌性,需及时更换小的那条,直至两条鱼没有排斥,且有亲密接触的,即为配对成功。正常配对的小丑鱼会以繁殖罐为窝,两条鱼亲密的在窝中活动。小丑鱼亲鱼成对饲养,养殖期间水温26~28℃,盐度28~32,溶氧5mg/l以上,pH7.5~8.2,光照强度2000~3000lx,每日光照时间8~10hs。
养殖期间投喂营养加强饵料、小丑鱼用人工海水鱼饲料及卤虫无节幼体,并每周投喂一次或几次抗菌肽溶液浸泡的小丑鱼用人工海水鱼饲料(粗蛋白≥51%,粗脂肪≥10%,粗纤维≤3%,粗灰分≤16%;粒径1.2mm);所述的抗菌肽为氨基酸序列为SEQ ID NO:1的抗菌肽;
所述的小丑鱼营养加强饵料包含有如下的组分:虾肉50%、牡蛎肉25%、扇贝肉10%、鱿鱼肉10%、螺旋藻粉4%、多维1%,用自主绞肉器打匀,分装之后低温冷冻,投喂时,提前从冰箱拿出,待恢复至室温时再行投喂。
更进一步的,本发明方法所使用的小丑鱼鱼菜共生循环水繁育***,包括***架、底滤缸、繁殖缸和藻缸。***架对***起到固定支撑作用,藻缸设置在***架的最上层,繁殖缸在***架中间层,底滤缸设置在***架的最底层;
所述的繁殖缸使用隔断间隔区域,作为繁殖格,缸底钻眼设置排水管,排水管连接底滤缸;
所述的藻缸一侧处设置下水仓,仓内底部中央处钻眼设置排水管,藻缸剩余空间为藻类培植仓;所述的排水管连通至繁殖缸繁殖格;
所述的底滤缸设置净水***和循环水泵,繁殖缸排水管流入净水***,净化后的水通过水泵泵入藻缸培植仓和繁殖缸的繁殖格中形成上水管路;
进一步的藻缸下水仓排水孔安装一插管根据需要设置插管的高度,来控制下水仓的水位;
进一步的所述的***架是用型材、不锈钢材质或木质材料做的缸体支架,支架底部四角配置万向轮或可调地脚;
进一步的所述的底滤缸净水***和循环水泵,使用双层错层玻璃做隔板将底滤缸均匀分为4格,分别为沉淀仓、蛋分仓、滤材仓和泵仓;
进一步的所述的底滤缸材质为玻璃;
进一步的所述的繁殖缸设置在***中间层,玻璃材质,在距离缸壁背侧处设置格栅,格栅为亚克力格栅,格栅前侧区域均匀分格,作为繁殖格,格栅背侧区域底部中央处钻眼设置排水管;
进一步的所述的藻缸设置在***的顶层,玻璃材质,使用隔板将藻缸左侧设一下水仓,仓内底部中央处钻眼设置排水,剩余空间均匀分为三格,从右到左分别为一级藻缸、二级藻缸和三级藻缸;
进一步的,所述繁殖缸前侧繁殖格底部中央部分钻眼设置强排,所有繁殖缸的强排通过PVC管连接在一起,直接通连至排污管,形成强排管路;
进一步的,将所有繁殖缸排水管连接在一起,通连至底滤缸左侧沉淀仓,形成回水管路;
进一步的,底滤缸左侧沉淀仓上架设镂空塑料筐,框内铺设多层过滤棉作初级过滤,蛋分仓内设置蛋白分离器,作次级过滤,滤材仓内放置陶瓷环,培植硝化菌群,作三级过滤,泵仓内设置水泵,上水管通连至繁殖缸和藻缸,繁殖缸每一繁殖格均设置阀门调节水流和水压,并在每一层上设置总阀门用于调节水流和水压,藻缸仅将上水管通连至右侧一级藻缸,在出口处设置阀门用于调节水流,并在藻缸入水口处设置雨淋管;
进一步的,将顶层藻缸排水管联通至繁殖缸,并通过管道分流至各繁殖格;在每一繁殖格均设置阀门调节水流和水压并设置总阀门用于调节水流和水压;
进一步的,泵仓水泵接出的上水管和藻缸接出的排水管分布在各繁殖格的入水口位置相对,并在入水口末端接鸭嘴口,鸭嘴口位置贴着繁殖格缸壁相对,鸭嘴口的高度略高于繁殖格内水位,调节各阀门,使每一繁殖格内均形成循环水流;
进一步的,底滤缸分格时调节隔板的高度,使水位高度沉淀仓>蛋分仓>滤材仓>泵仓;藻缸分格时调节隔板的高度,使水位高度一级藻缸>二级藻缸>三级藻缸>下水仓;
进一步的,底滤缸和藻缸隔板为双层错位玻璃;
进一步的,底滤缸沉淀仓内设置紫外线杀菌灯、控温***;紫外线杀菌灯波长为240-260nm,控温***调节水温为22-26℃;
进一步的,所有藻缸内底层均匀铺设一层中空透孔的陶瓷环,供海洋观赏藻类攀附;
进一步的,繁殖缸上设置LED生物光源,光照强度2000-3000lx,灯珠白色光源,光源设置自动定时,开启时间为每日7:00-17:00;藻缸上也设置LED生物光源,灯珠选择蓝色和红色光源,光源设置自动定时,开启时间为每日9:00-17:00。
进一步的,繁殖缸繁殖格之间的玻璃隔板用黑色塑料纸黏贴上,避免不同繁殖格内小丑鱼互相看到而打斗;每一繁殖格内侧卧放置合适大小消毒过的陶制花盆作为繁殖罐。
本发明针对的繁育养殖对象是小丑鱼和海洋观赏藻类,海洋观赏藻类的养殖缸放在***的顶层,既可以稳定生产,又可为循环水繁育***提供净化;藻缸内供海藻攀附的基质采用陶瓷环而不是海沙,有效扩大了培菌体积,同时在满足海藻须根攀附的基础上对水流循环没有任何阻碍,而且也不容易蓄积污染物。本发明充分满足了小丑鱼和海洋观赏藻类的生态需求,有效实现了立体混合繁育和养殖,增加了繁育和养殖的经济效益;同时小丑鱼的残饵与粪便被藻类作为营养有效吸收,提供了水质净化,使养殖水体的物质和能量平衡处于一种动态的平衡状态。本发明同时提供了人工配置海水来繁育小丑鱼和海洋观赏藻类的方法,有效地拓展了小丑鱼和海洋观赏藻类的繁育养殖空间,是小丑鱼和海洋观赏藻类的一种灵活有效的繁育养殖方式补充。
附图说明
图1:小丑鱼鱼菜共生循环水繁育***结构图;
图2:小丑鱼鱼菜共生循环水繁育***藻缸的结构图;
图3:小丑鱼鱼菜共生循环水繁育***繁殖缸的结构图
图4:小丑鱼鱼菜共生循环水繁育***底滤缸的结构图;
附图中:1.***架;2.繁殖缸;2.1格栅2.2繁殖格;3底滤缸3.1沉淀仓、3.2蛋分仓、3.3滤材仓、3.4泵仓、3.5泵,4藻缸,4.1插管,4.2下水仓,4.3培植仓,5上水管,5.1雨淋管,6.强排,7.排水管,8阀门,9排污管,10.隔板
具体实施方式
传统小丑鱼和藻类的养殖是分别在水泥育苗池或栽培池中进行的,受制于季节因素、地域因素,也较易受到水源和养殖环境的限制。申请人在充分考虑养殖对象的生态习性和养殖繁育需求的基础上,充分利用循环水养殖模式的优势,构建了本发明养殖对象立体混合繁育和养殖模式。有力地拓展了养殖对象的繁育养殖空间,实现了小丑鱼与海洋观赏藻类“鱼菜共生”式稳定高效健康繁育与养殖。而且本***可以作为一个独立可复制的单元,可以根据市场需求和产值效益进行扩展。下面结合实施例对本发明进行详细的描述。
实施例1
本发明提供小丑鱼鱼菜共生循环水繁育***,包括***架1、底滤缸3、繁殖缸2和藻缸4。
所述的***架1对***起到固定支撑作用,所述的藻缸4设置在***架的最上层,所述的养殖缸2在***架中间层,所述的底滤缸3设置在***架1的最底层;
所述的繁殖缸2在距离缸壁背侧处设置亚克力格栅,格栅2.1前侧区域使用隔断间隔区域,作为繁殖格2.2,格栅背侧处缸底钻眼设置排水管,排水管7连接底滤缸3;
所述的藻缸4左侧处设一下水仓4.2,下水仓4.2内底部中央处钻眼设置排水管7,剩余空间种植藻类;所述的排水管连通至繁殖缸的繁殖格2.2;
所述的底滤缸3设置净水***和循环水泵,繁殖缸2排水管流入净水***,净化后的水通过水泵3.5泵入藻缸培植仓4.3和繁殖缸的繁殖格2.2中;
优选的所述的***架是用型材、不锈钢材质或木质材料做的缸体支架,其长度150cm,宽度60cm,高度230cm,分为四层,层高分别为65cm、55cm、55cm、55cm;
优选的所述的底滤缸有净水***和循环水泵,使用双层错层玻璃将底滤缸均匀分为4格,分别为沉淀仓3.1、蛋分仓3.2、滤材仓3.3和泵仓3.4;
优选的所述的底滤缸3玻璃材质,玻璃厚度8mm,长度150cm,宽度60cm,高度40cm;
优选的所述的底滤缸和藻缸隔板10为双层错位玻璃;
优选的所述的繁殖缸2设置在***的第二层和第三层,玻璃材质,玻璃厚度8mm,长度150cm,宽度60cm,高度35cm,在距离缸壁背侧15cm处设置亚克力格栅,格栅2.1前侧区域均匀分为5格,作为繁殖格2.2,格栅背侧区域底部中央处钻眼设置排水管,排水钻眼尺寸50cm;
优选的所述的藻缸4设置在***的顶层,玻璃材质,玻璃厚度8mm,长度150cm,宽度60cm,高度35cm,在藻缸左侧15cm处设一下水仓,仓内底部中央处钻眼设置排水,排水钻眼尺寸50cm,排水孔安装一插管4.1根据需要设置插管的高度,来控制水仓的水位,剩余空间均匀分为三格,从右到左分别为一级藻缸、二级藻缸和三级藻缸;
优选的所述繁殖缸前侧各繁殖格底部中央部分钻眼设置强排,排水钻眼尺寸25cm,两个繁殖缸的所有强排6通过PVC管连接在一起,直接通连排污管9,形成强排管路;
优选的将第二层和第三层繁殖缸排水连接在一起,通联至底滤缸左侧沉淀仓3.1,形成回水管路;
优选的底滤缸左侧沉淀仓3.1上架设镂空塑料筐,框内铺设多层过滤棉作初级过滤,蛋分仓3.2内设置蛋白分离器,作次级过滤,滤材仓3.3内放置陶瓷环,培植硝化菌群,作三级过滤,泵仓内设置水泵,上水管5通连至繁殖缸和藻缸,繁殖缸2每一繁殖格2.2均设置阀门调节水流和水压,并在每一层上设置总阀门用于调节水流和水压,藻缸仅将上水管通连至右侧一级藻缸,并在出口处设置阀门8用于调节水流和水压;
所述的藻缸上水管5端点处安装雨淋管5.1,可以分散水流和水压,使净化后的水更均匀地与藻类植物接触,利于藻类培植生长;
优选的将顶层藻缸下水仓4.2排水单独连通至第二层和第三层繁殖缸,并通过管道分流至各繁殖格;在每一繁殖格均设置阀门调节水流和水压并在第二层和第三层上设置总阀门用于调节水流和水压;
优选的泵仓水泵接出的上水管5和藻缸4接出的排水管7分布在各繁殖格的入水口位置相对,并在入水口末端接鸭嘴口,鸭嘴口位置贴着繁殖格缸壁相对,鸭嘴口的高度略高于繁殖格内水位,调节各阀门,使每一繁殖格2.2内均形成循环水流;
优选的底滤缸分格时调节隔板的高度,使水位高度沉淀仓3.1>蛋分仓3.2>滤材仓3.3>泵仓3.4;藻缸分格时调节隔板的高度,使水位高度一级藻缸>二级藻缸>三级藻缸>下水仓;
优选的底滤缸沉淀仓内设置紫外线杀菌灯、控温***;紫外线杀菌灯波长为240-260nm,控温***调节水温为22-26℃;
优选的所有藻缸内底层均匀铺设一层中空透孔的陶瓷环,供海洋观赏藻类攀附;
优选的繁殖缸上设置LED生物光源,光照强度2000-3000lx,灯珠白色光源,光源设置自动定时,开启时间为每日7:00-17:00;藻缸上也设置LED生物光源,灯珠选择蓝色和红色光源,光源设置自动定时,开启时间为每日9:00-17:00;
优选的繁殖缸内繁殖格之间的玻璃隔板用黑色塑料纸黏贴上,避免不同繁殖格内小丑鱼互相看到而打斗;每一繁殖格内侧卧放置合适大小消毒过的陶制花盆作为繁殖罐。
实施例2:
本发明提供一种小丑鱼鱼菜共生循环水繁育方法,包括养水、种藻、投鱼管理和采收等环节。具体步骤如下:
1、养水:利用实施例1所提供的***,注入新鲜消毒的海水,开启水泵与蛋白分离器,打开紫外杀菌灯,控制水温22~26℃,盐度28~32,不间断循环3天后,往浮性滤材仓和沉性滤材仓中注入净化菌株,并辅以微生物挂膜营养液(1L水体添加5ml营养液),用以加速微生物载体(滤材)生物膜的形成;养水1月后,检测水中氨氮和亚硝酸氮浓度,至NH4 +-N浓度<1.0mg/L,NO2 --N<0.1mg/L,即为养水阶段完成。
所述的净化菌株为硝化杆菌和枯草芽孢杆菌的混合菌株,其一种具体比例为1:2比例混合液,
进一步的,所用净化菌株经纯化培养后,挑取单菌落接入液体培养基进行扩大培养。液体培养基采用胰蛋白胨大豆肉汤液体培养基,制备活菌浓度为109cfu/ml以上的接种液。
其中液体培养基的成分为1L蒸馏水中含胰蛋白胨15g、大豆蛋白胨5g、葡萄糖4g、氯化钠28g、磷酸氢二钾3g,经121℃高压灭菌15min后备用。
所述的微生物挂膜营养液为添加了黏土和沸石粉的NH4 +-N溶液;
所述的NH4 +-N溶液是40mg/l的氯化铵溶液;
进一步的,黏土为河口沉积泥沙凝结而成,将其暴晒干燥后粉碎,并经300目筛绢过筛;沸石粉购自市场,也经300目筛绢过筛。过筛后得到的超细黏土和沸石粉按照2:1的比例混合,取2g黏土和沸石粉的超细颗粒混合物注入1L 40mg/l的氯化铵溶液中,在容器中强力通气使之在NH4 +-N溶液中悬浮均匀,即制成营养液,
进一步的,浮性滤材仓和沉性滤材仓中均匀注入净化菌株接种液和微生物挂膜营养液,最终使两个滤材仓中净化菌株的浓度达到103cfu/ml。
进一步的,此步骤中新鲜消毒的海水可以直接取自然海水消毒处理,也可以用市售海水盐来配置海水,配置海水可以选取纯净水或消毒后的自来水,配置盐度为28~32。
2、种藻:植株亲本来自于野采或市场购买,经一星期暂养驯化达到亲本标准;将陶瓷环清洗消毒,环孔朝上均匀的平铺在养殖缸内;选取匍匐茎多的藻体,轻柔地将缠绕成团的藻团分成单株,选取新生枝较长、颜色鲜嫩的藻体,将其须根及匍匐茎,用镊子小心穿过陶瓷环;将附着藻体的陶瓷环均匀铺设在养殖缸内平铺的陶瓷环之间,陶瓷环凹凸不平的表面为藻体须根的附着提供了较好的条件,固定时直立茎向上,匍匐茎横向延伸,假根在下面,便于附着在陶瓷环上。附在陶瓷环上的植株大约2天后长出新的白色假根,丝状假根能附着在陶瓷环上,随后匍匐茎和直立茎的长度和数量也进行增长。新生的小枝呈白色,随后会逐渐变绿,慢慢饱满。种藻之后两周,植株完全适应水体环境,生物量稳步增多。
进一步的,此一步骤藻类种植密度为25~35g/m2,水质指标为:水温22~26℃,盐度28~32,pH7.5~8.2,光照强度3000~4000lx。
进一步的,一级藻缸水位较深,栽种羽毛藻和杉叶蕨藻;二级藻缸水位适中,栽种葡萄藻;三级藻缸水位较低,栽种红葡萄藻。
3、投鱼管理:选取市售野生或人工培育的小丑鱼,选取规格雌性6-10cm,雄性4-5cm,体色正常、健康无损伤、活力充沛的小丑鱼作为亲鱼,入缸前进行检疫,经三天暂养适应水质环境。将雌雄小丑鱼投入养殖缸中,小丑鱼会自由活动,观察其行为,如果小丑鱼有争斗现象,说明两条均为雌性,需及时更换小的那条,直至两条鱼没有排斥,且有亲密接触的,即为配对成功。正常配对的小丑鱼会以繁殖罐为窝,两条鱼亲密的在窝中活动。
进一步的,小丑鱼初次进缸时需转水,首先将盛小丑鱼的塑料袋连鱼带水放至***水体中平衡水温半小时,然后将小丑鱼连带运输的水倒入空水桶中,采用滴定的方法,将养殖***内的水逐步滴加至盛小丑鱼的水桶中,至水桶中滴加的水是原来水量的2倍即可将小丑鱼用抄网仔细的捞入***的养殖缸中。
小丑鱼养殖期间控制水温26~28℃,盐度28~32,溶氧5mg/l以上,pH7.5~8.2,光照强度2000~3000lx,光源设置自动定时开启,光照时间设置为每日7~17:30;;每天7:30、12:30和17:00定时投喂,每周用复合微生素、免疫多糖和抗菌肽溶液浸泡小丑鱼专用人工海水鱼饲料做成药饵,投喂小丑鱼一次;每日下午投喂二十分钟后吸底换水一次;每天定时清洗蛋白分离器;每周定时清洗过滤棉;每周***整体换水10%。
进一步的,小丑鱼7:30投喂自制营养加强饵料;12:30投喂小丑鱼专用人工海水鱼饲料;17:00投喂卤虫无节幼体。
进一步地说,小丑鱼自制营养加强饲料主要原料为虾肉50%、牡蛎肉25%、扇贝肉10%、鱿鱼肉10%、螺旋藻粉4%、多维1%,用自主绞肉器打匀,分装之后低温冷冻,投喂时,提前从冰箱拿出,待恢复至室温时再行投喂。本发明提供的小丑鱼自制营养加强饲料是根据小丑鱼的需求针对性的调配的,有利于保持营养的均衡和性腺的强化。
小丑鱼专用人工海水鱼饲料可以采用市售的产品。
4、采收:每2月对繁育***顶层藻缸进行一次采收;对小丑鱼卵的采收要根据小丑鱼的性腺发育状况来进行。野生小丑鱼需养殖半年以上性腺才会发育成熟,人工小丑鱼需要研制一年以上性腺才会发育成熟,根据小丑鱼实际发育情况进行护理,当小丑鱼有啄板现象(清理繁殖罐)时,即说明小丑鱼即将繁殖;当繁殖罐上出现小丑鱼粘附的鱼卵时,可对小丑鱼加强护理,保持安静。小丑鱼亲鱼会对受精卵小心看护,用鳍为受精卵输送氧气,啄掉死去发白的鱼卵。当出卵7天,小丑鱼鱼卵眼点突出即将起飞时,即可把繁殖罐采收到单独的孵化缸中孵化。
进一步的,进行藻缸采收时,可根据不同藻类生长情况进行采收,部分收获以降低养殖密度;藻体根据生长程度进行收割,以采收直立茎为主,保留部分藻种用于下一周期养殖。
进一步的,当小丑鱼已经达到初次性成熟并繁殖过一次之后,可对小丑鱼进行营养强化,小丑鱼的繁殖周期为2周左右,2周后,小丑鱼会再次产卵,根据小丑鱼胚胎发育情况可再次采收。
按照上述的方法,依托青岛农业大学海洋科学与工程学院构建规格为长1.5米,宽0.6米,高度2.3米的小丑鱼鱼菜共生循环水繁育***,选取小丑鱼-公子小丑、红小丑、透红小丑、金透红小丑、黑公子小丑、黑背心小丑,选取藻类-葡萄藻、羽毛藻、杉叶蕨藻、红葡萄藻。开展生态混合繁育。小丑鱼是游泳活拨的鱼类,其有强烈的领域行为,在生活时喜欢雌雄配对,如果有两个雌鱼在一起,其会互相争斗,直至一方死亡,因此在放置鱼时首先根据大小规格进行区分雌雄,一般雌性5cm以上,雄性4cm左右,在每一繁殖格内各放置一对鱼,仔细观察,如出现打斗的现象,及时分开,如出现雌雄互相亲昵,则为配对成功;葡萄藻、羽毛藻、杉叶蕨藻、红葡萄藻则利用须根和匍匐茎附着在陶瓷环上,直立茎竖直生长;水循环***底滤设置沉淀仓、蛋分仓、滤材仓和泵仓,沉淀仓上架设镂空塑料筐,筐内铺设多层滤棉;通过滤棉过滤、沉淀过滤、蛋白分离器过滤和硝化***(滤料仓)过滤等环节,保障水循环***水质;优良的水质保证了繁殖格中小丑鱼的水质条件,小丑鱼的残饵和粪便为藻缸中观赏藻类的生长提供了营养,同时也对水质净化起到了重要作用。
混养规格:葡萄藻、羽毛藻、杉叶蕨藻、红葡萄藻植株亲本购至水族市场,经一星期暂养驯化达到亲本标准;选取浅绿色、匍匐茎多的藻体(红葡萄藻则选取造粒红润、匍匐茎多的);轻柔地将缠绕成团的藻团分成单株,选取新生枝较长、颜色鲜嫩的藻体。小丑鱼购自市场野捕,选取雌雄5~6cm,雄性4cm健康活力好的野生小丑鱼作为亲本,暂养于山东省青岛农业大学海洋科学与工程学院室内海水循环水养殖***中,经三天暂养适应水质环境。小丑鱼初次进缸时需转水,首先将盛小丑鱼的塑料袋连鱼带水放至***水体中平衡水温半小时,然后将小丑鱼连带运输的水倒入空水桶中,采用滴定的方法,将养殖***内的水逐步滴加至盛小丑鱼的水桶中,至水桶中滴加的水是原来水量的2倍即可将小丑鱼用抄网仔细的捞入***的暂养缸中。
混养顺序:小丑鱼鱼菜共生循环水繁育***经4周的循环运转,培养硝化菌群,将准备好的葡萄藻、羽毛藻、杉叶蕨藻、红葡萄藻藻体均匀固定在养殖缸底层陶瓷环上,固定时直立茎向上,匍匐茎横向延伸,假根在下面,便于附着在陶瓷环上。一级藻缸水位较深,栽种羽毛藻和杉叶蕨藻;二级藻缸水位适中,栽种葡萄藻;三级藻缸水位较低,栽种红葡萄藻。附在陶瓷环上的植株大约2天后长出白色假根,丝状假根能附着在陶瓷环上,随后匍匐茎和直立茎的长度和数量也进行增长。新生的小枝呈白色,随后会逐渐变绿(红葡萄藻变红),慢慢饱满。1周后将暂养的小丑鱼放入养殖缸繁殖格内,小丑鱼会自由活动,观察其行为,如果小丑鱼有争斗现象,说明两条均为雌性,需及时更换小的那条,直至两条鱼没有排斥,且有亲密接触的,即为配对成功。混养1天后,小丑鱼即可正常投喂。
养殖管理:控制水温26~28℃,盐度28~30,溶氧5mg/l以上,pH7.5~8.2,光照强度2000~3000lx,光源设置自动定时开启,光照时间设置为每日7~17:30;每天7:30、12:30和17:00定时投喂,小丑鱼7:30投喂自制营养加强饵料;12:30投喂小丑鱼专用人工海水鱼饲料;17:00投喂卤虫无节幼体。下午投喂二十分钟后吸底换水一次;每天定时清洗蛋白分离器;每周定时清洗过滤棉;每周***整体换水10%。
繁育养殖周期自2020年6月8日至2020年12月7日,共计180天。
混养效果:经过180天养殖,已获得配对成功的10对小丑鱼亲鱼,其中公子小丑鱼2对,红小丑鱼2对,透红小丑鱼2对,金透红小丑鱼1对,黑公子小丑鱼1对,黑背心小丑鱼1对,黑背心小丑♀×黑公子小丑鱼♂1对。其中能够繁殖生产的有公子小丑鱼1对、红小丑鱼1对,透红小丑鱼有啄板现象,即将进行初次繁殖;葡萄藻、羽毛藻、杉叶蕨藻、红葡萄藻已经采收3次,其生长速度:羽毛藻>葡萄藻>杉叶蕨藻>红葡萄藻;藻体总重从250克长至2538克,增重率为1015.2%,成活率100%。
海洋观赏藻类的须根和匍匐茎攀附在藻缸底层的陶瓷环上,直立茎挺直生长,吸收水中的氮磷。本发明方法充分利用了小丑鱼和海洋观赏藻类的生态特点,有效实现了立体混合繁育和养殖,增加了繁育和养殖经济效益;同时小丑鱼的残饵与粪便被藻类作为营养有效吸收,提供了水质净化,使养殖水体的物质和能量处于一种动态的平衡状态。
为了提高小丑鱼的免疫力,使用氨基酸序列为
LISDLLIGETESHPQTRYEDQLVW CLGTLTGYPTKPDNP(SEQ ID NO:1)的抗菌肽浸泡小丑鱼专用人工海水鱼颗粒饲料,该抗菌肽对副溶血弧菌、嗜水气单胞菌和迟缓爱德华氏菌具有明显的抑菌能力(表1)。
表1:抗菌肽(SEQ ID NO:1)对多种水产致病菌的最低抑菌浓度
小丑鱼性格活拨,杂食性偏肉食性,肠道较短,较易受到肠道细菌性疾病的侵袭。本发明中所用的抗菌肽对小丑鱼主要肠道致病菌副溶血弧菌、嗜水气单胞菌均有较好的抑菌效果,有利于小丑鱼肠道的健康养殖。而且本发明中采用的抗菌肽溶液浸泡颗粒饲料做成药饵的给药途径不会使小丑鱼产生应激反应。
Claims (10)
1.一种小丑鱼鱼菜共生循环水繁育方法,其特征在于,所述的方法包括如下的步骤:
(1)养水:在共生循环***中注入新鲜消毒的盐度为28~32的海水,开启水泵与蛋白分离器,打开紫外杀菌灯,控制水温22~26℃,盐度28~32,不间断循环后,往滤材仓中接种净化菌株和营养液来培养生物膜,至水体中NH4+-N浓度<1.0mg/L,NO2--N<0.1mg/L完成养水阶段;
(2)种藻:将陶瓷环清洗消毒,环孔朝上均匀的平铺在藻缸内;另取陶瓷环,将藻类的须根或匍匐茎穿过陶瓷环;将附着藻体的陶瓷环均匀铺设在养殖缸内平铺的陶瓷环之间进行养藻;
(3)繁育小丑鱼:规格雌性6-10cm,雄性4-5cm,体色正常、健康无损伤、活力充沛的小丑鱼作为亲鱼,投入养殖缸中,小丑鱼亲鱼成对饲养,养殖期间水温26~28℃,盐度28~32,溶氧5mg/l以上,pH7.5~8.2,光照强度2000~3000lx,每日光照时间8~10hs;
养殖期间投喂小丑鱼营养加强饵料、小丑鱼用人工海水鱼饲料及卤虫无节幼体,并每周投喂一次或几次抗菌肽溶液浸泡的小丑鱼用人工海水鱼饲料;
所述的藻类种植密度为25~35g/m2;水质指标为:水温22~26℃,盐度28~32,pH7.5~8.2,光照强度3000~4000lx;
所述的藻类,为葡萄藻、杉叶蕨藻、羽毛藻、鹿角藻、红葡萄藻、红千层或火焰藻。
2.根据权利要求1所述的小丑鱼鱼菜共生循环水繁育方法,其特征在于,所述的净化菌株为硝化杆菌和枯草芽孢杆菌的混合菌株,所述的硝化杆菌和枯草芽孢杆菌的数量比为1:2。
3.根据权利要求1所述的小丑鱼鱼菜共生循环水繁育方法,其特征在于,所述的营养液为添加了黏土和沸石粉的NH4 +-N溶液;所述的NH4 +-N溶液为40mg/l的氯化铵溶液。
4.根据权利要求1所述的小丑鱼鱼菜共生循环水繁育方法,其特征在于,所述的小丑鱼用人工海水鱼饲料包含有如下的组分:粗蛋白≥51%,粗脂肪≥10%,粗纤维≤3%,粗灰分≤16%;粒径1.2mm;所述的抗菌肽为氨基酸序列为SEQ ID NO:1的抗菌肽。
5.根据权利要求1所述的小丑鱼鱼菜共生循环水繁育方法,其特征在于,所述的小丑鱼营养加强饵料包含有如下的组分:虾肉50%、牡蛎肉25%、扇贝肉10%、鱿鱼肉10%、螺旋藻粉4%、多维1%。
6.根据权利要求1-5所述的小丑鱼鱼菜共生循环水繁育方法所使用的循环水繁育***,其特征在于,所述的循环水***包括***架(1)、底滤缸(3)、繁殖缸(2)和藻缸(4);
所述的***架(1)对***起到固定支撑作用,所述的藻缸(4)设置在***架(1)的最上层,所述的繁殖缸(2)在***架(1)中间层,所述的底滤缸(3)设置在***架(1)的最底层;
所述的繁殖缸(2)在距离缸壁背侧处设置亚克力格栅,格栅(2.1)前侧区域使用隔板间隔区域,作为繁殖格(2.2),格栅背侧处缸底钻眼设置排水管(7),所述的排水管(7)连接底滤缸(3);
所述的藻缸(4)一侧处设置下水仓(4.2),仓内底部中央处钻眼设置排水管(7),藻缸(4)剩余空间为藻类培植仓(4.3);所述的排水管(7)连通至繁殖格(2.2);
所述的底滤缸(3)设置净水***和循环水泵,繁殖缸(2)排水管(7)流入净水***,净化后的水通过水泵由上水管(5)泵入藻缸培植仓(4.3)和繁殖缸(2)的繁殖格(2.2)中形成上水管路;
所述的上水管(5)连通至繁殖格(2.2)和藻缸(4),繁殖缸(2)每一繁殖格(2.2)均设置阀门(8)调节水流和水压,并在每一层上设置总阀门用于调节水流和水压,上水管(5)连通至右侧一级藻缸(4),在出口处设置阀门(8)用于调节水流,并在藻缸(4)入水口处设置雨淋管(5.1);
所述的繁殖格(2.2)底部中央部分钻眼设置强排(6),所有繁殖缸(2)的强排(6)通过PVC管连接在一起,直接连通至排污管(9),形成强排管路;
所述的繁殖缸(2)排水管(7)连接在一起,连通至底滤缸(3)左侧沉淀仓(3.1),形成回水管路。
7.根据权利要求6所述的小丑鱼鱼菜共生循环水繁育***,其特征在于,所述的藻缸(4)下水仓(4.2)排水孔安装一插管(4.1)根据需要设置插管(4.1)的高度,来控制下水仓(4.2)的水位;
所述的藻缸(4)设置在***的顶层,使用隔板(10)将藻缸(4)左侧设一下水仓(4.2),仓内底部中央处钻眼设置排水,剩余空间均匀分为三格,从右到左分别为一级藻缸、二级藻缸和三级藻缸。
8.根据权利要求6所述的小丑鱼鱼菜共生循环水繁育***,其特征在于,所述的***架(1)是用型材、不锈钢材质或木质材料做的缸体支架,支架底部四角配置万向轮或可调地脚。
9.根据权利要求6所述的小丑鱼鱼菜共生循环水繁育***,其特征在于,所述的底滤缸(3)设置净水***和循环水泵,使用隔板(10)将底滤缸(3)均匀分为4格,分别为沉淀仓(3.1)、蛋分仓(3.2)、滤材仓(3.3)和泵仓(3.4)。
10.根据权利要求9所述的小丑鱼鱼菜共生循环水繁育***,其特征在于,所述的底滤缸(3)分格时用隔板(10)调节高度,使水位高度沉淀仓(3.1)>蛋分仓(3.2)>滤材仓(3.3)>泵仓(3.4);藻缸(4)分格时调节隔板(10)的高度,使水位高度一级藻缸(4)>二级藻缸(4)>三级藻缸(4)>下水仓(4.2);
所述的底滤缸(3)和藻缸(4)的隔板(10)为双层错位玻璃;
所述的底滤缸(3)左侧沉淀仓(3.1)上架设镂空塑料筐,框内铺设多层过滤棉作初级过滤,蛋分仓(3.2)内设置蛋白分离器,作次级过滤,滤材仓(3.3)内放置陶瓷环,培植硝化菌群,作三级过滤,泵仓(3.4)内设置水泵。
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