江苏兴化地区池塘养殖中华绒螯蟹生长性能与养殖效益分析

发布时间：2018-05-25 14:24

本文选题：中华绒螯蟹 + 养殖模式　；参考：《苏州大学》2016年硕士论文

【摘要】：本文以江苏地区中华绒螯蟹池塘养殖为研究对象,立足于江苏中华绒螯蟹养殖大县兴化及周边地区,以单个池塘为研究对象,选择使用同一品牌饲料的9个中华绒螯蟹养殖池塘,在同一个养殖年度内(2014年),依据其中华绒螯蟹的放养时间,苗种的放养规格,苗种的放养密度等数据,从收获的中华绒螯蟹商品蟹平均规格、雌雄蟹数量和重量比例、日增重等方面进行统计分析了池塘养殖中华绒螯蟹的生长性能和养殖的经济效益。比较分析不同中华绒螯蟹池塘养殖模式下的中华绒螯蟹生长速度,雌雄蟹所占重量比例,探讨出更好的池塘养殖模式及中华绒螯蟹各规格之间的比例。本文结果显示为中华绒螯蟹的养殖经济效益与中华绒螯蟹的池塘养殖模式、商品蟹个体规格、中华绒螯蟹的雌雄比例等有着直接的关系。(1)养殖规格较小的池塘即使产量取得不错的成绩也无法获得最佳的经济效益,因此中华绒螯蟹商品蟹个体规格大小是影响养殖效益的主要因素之一。商品蟹个体规格越大、市场价格好、养殖经济效益高,如7号和8号池塘的个体规格是9个池塘中平均个体规格最好的,分别为162.67g/只和162.24g/只,这两个池塘的养殖效益也是最好的,分别为7854.97元/667 m2和7430.81元/667 m2。(2)雄蟹比例高,得到的商品蟹个体规格大、养殖效益高,7号池塘中,雄蟹和雌蟹的个体比例为42.57%和57.43%,在9个池塘中是雌蟹个体比例最高的,其667m2效益为7854.97元,是9个目标池塘中最高的。(3)兴化地区现有的中华绒螯蟹养殖模式较为合理,既能满足中华绒螯蟹生长性能的最佳要求,又能获得良好的养殖经济效益。主养中华绒螯蟹,搭配青虾,虑食性鱼类搭配鲢鱼和鳙鱼的养殖模式能获得良好的经济效益,其中中华绒螯蟹数量密度在1200~1500尾/667m2,(规格5~6g/尾),青虾3~5kg/667m2,(3000尾/500g左右),花白鲢20~30尾/667m2,(规格0.5kg/尾上下),10~15尾鳜鱼苗(3~5cm体长),这样的池塘养殖模式能获得最佳的经济效益,如本文的7号池塘的667m2效益为7854.97元。
[Abstract]:This paper takes the pond culture of Eriocheir sinensis in Jiangsu as the research object, based on the Xinghua and its surrounding areas in the big counties of Jiangsu Province, and takes a single pond as the research object. Nine ponds of Chinese mitten crab (Eriocheir sinensis) with the same brand feed were selected and cultured in the same breeding year (2014), according to the data of the time of stocking of Eriocheir sinensis, the specification of seed species, the density of seed species, etc. The growth performance and economic benefit of cultured Eriocheir sinensis in ponds were analyzed in terms of the average size of commercial crab, the number and weight ratio of male and female crabs, daily gain and so on. The growth rate of Eriocheir sinensis and the weight ratio of female and male crabs in different pond culture models of Eriocheir sinensis were compared and analyzed, and the better pond culture model and the proportion between different specifications of Eriocheir sinensis were discussed. The results show that it is the economic benefit of Chinese mitten crab culture and the pond culture mode of Chinese mitten crab, and the individual specification of commercial crab. The ratio of male and female of Eriocheir sinensis has a direct relationship. Therefore, the individual size of commercial crabs is one of the main factors that affect the efficiency of culture. The larger the individual size of commercial crab is, the better the market price is, and the higher the economic benefit of breeding is. For example, the individual size of Pond No. 7 and Pond No. 8 is the best among the nine ponds, 162.67g/ only and 162.24g/ only, respectively. These two ponds are also the best ones, with a ratio of 7854.97 yuan / 667m2 and 7430.81 yuan / 667m2.2respectively) the ratio of male crab to male crab is high. The commercial crab has a large individual size and high culture benefit. In Pond No. 7, The individual ratio of male crab and female crab was 42.57% and 57.43% respectively. The proportion of female crab was the highest in nine ponds, and the 667m2 benefit was 7854.97 yuan, which was the highest in nine target ponds. It can not only meet the best requirements for the growth performance of Eriocheir sinensis, but also obtain good economic benefit. The main culture of Eriocheir sinensis, with shrimp, eating fish and silver carp and bighead carp, can obtain good economic benefits. The population density of Eriocheir sinensis is 1 200 / 1 500 / 667 m ~ 2 ~ (2) (standard 5~6g/ tail, 3 ~ 5 kg / 667 m ~ (2) ~ 2 ~ 3 000 / 500 g / 500), 20 30 / 66 ~ 7 m ~ 2 ~ (2) of silver carp (0.5kg/ tail / 1 015 / 3 ~ 5 cm). This kind of pond culture model can obtain the best economic benefit. For example, the 667m2 benefit of Pond No. 7 in this paper is 7854.97 yuan.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：S966.16

【相似文献】