Crab allergic cages, relates to a cage aquaculture, especially relates to a crab allergic device for marine crab megalopa and the first to the third period from. Provides a method to improve the survival rate of abnormal crab, crab crab cage convenient sale metamorphosis. The utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is characterized in that the utility model is provided with a. The utility model has the advantages of reducing the labor amount of personnel operation, avoiding the loss caused by improper operation, simple and compact structure, and can be used repeatedly.
【技术实现步骤摘要】
本技术涉及一种水产养殖网箱,尤其是涉及一种适用于海洋蟹类大眼幼体和第一至第三期仔蟹的蟹苗变态装置。
技术介绍
青蟹和梭子蟹是我国重要的海水养殖蟹类。当人工育苗进行到蟹苗(大眼幼体和仔蟹)阶段,幼体的生活方式由浮游转换成为底栖,对生存面积的需求骤然加大;另外,由于蟹苗具有互相残杀的生活习性,在这个阶段往往出现很高的死亡率,严重削减了蟹苗成活率。如何增加育苗池内蟹苗的生存面积,已成为解决问题的关键。此外,海洋蟹类出售的蟹苗通常为仔蟹,按照现今通用的方法,必须放干育苗池水,才能完全清理出仔蟹,该过程不仅耗费时间,而且会损伤仔蟹的身体。因此,仔蟹的出池技术亟需得到改进。
技术实现思路
本技术旨在针对现有的蟹苗出池技术中存在的缺点,提供一种提高蟹苗变态成活率,方便仔蟹出售的蟹苗变态网箱。本技术设有网框、浮体和网衣,浮体设于网框上,网衣的上部开口连接在网框上,网衣为20~40目。所述的网框可为方形、三角形、圆形或椭圆形等网框,网框可为管状网框或杆状网框,网框可为塑料管网框、竹管网框、金属管网框或木杆网框等。所述的浮体可为浮块、浮球、浮杆等。所述的网衣可为筛绢网衣、尼龙网衣或蚊帐布网衣等。所述的网框最好为长方形网框,其长、宽最好分别为100~200、50~100cm。浮体设4个,分别设在长方形网框的4根边框上。网衣的长、宽、高最好分别为100~200、50~100、50~100cm。当本技术置于育苗池中时,能够保持飘浮并使网框高出水面。由于网衣由20~40目的筛绢网、尼龙网等制成,因此饵料生物可以自由出入网箱,而蟹苗不会逃逸出去。使用时,将变态网箱放入育苗池中,再将大眼幼体转移入 ...
【技术保护点】
蟹苗变态网箱,其特征在于设有网框、浮体和网衣,浮体设于网框上,网衣的上部开口连接在网框上,网衣为20~40目。
【技术特征摘要】
1.蟹苗变态网箱,其特征在于设有网框、浮体和网衣,浮体设于网框上,网衣的上部开口连接在网框上,网衣为20~40目。2.如权利要求1所述的蟹苗变态网箱,其特征在于所述的网框为方形网框、三角形网框、圆形网框或椭圆形网框。3.如权利要求1所述的蟹苗变态网箱,其特征在于网框为管状网框或杆状网框。4.如权利要求1或2或3所述的蟹苗变态网箱,其特征在于网框为塑料管网框、竹管网框、金属管网框或木杆网框。5.如权利要求1所述的蟹苗变态网箱,其特征在于所述的浮体为浮块、浮球、浮杆。6.如权利要求1所述的蟹苗变态网箱,其...
【专利技术属性】
技术研发人员:叶海辉,陈学雷,林琼武,王桂忠,李少菁,艾春香,
申请(专利权)人:厦门大学,
类型:实用新型
国别省市:92[中国|厦门]
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