本研究针对斑鳜苗种培育、鱼种养殖和成鱼养殖3个阶段开展了相应的生态养殖

In this study, for scherzeri fry rearing, fish farming and fish farming into three stages carried out the corresponding ecological farming trials, including fry rearing test, domestication and artificial feed feeding trials in different stocking of large-sized fish cultivation scherzeri kinds of tests, water spinach floating bed for scherzeri large size fingerling rearing and scherzeri to test the effect of ecological fish polyculture trials, in addition to common diseases and prevention methods scherzeri fry rearing and develop the project implementation process since 2016 has been in to sum up. The test results show larval rearing stage, 6872 newly hatched larvae cultivated to 20d, the full-length 2.5 cm were harvested spot mandarin seedlings 5143, foster the survival rate was 74.83%. Artificial diet and feeding domesticated results show, the entire length of the body 3cm spot mandarin seedlings stocking densities of 333 / m2 and 500 / m2, tame food success rate of 70.2% and 65.5%, respectively; the full-length 5cm when spot mandarin seedlings stocking density of 250 / m2 and 375 / m2, respectively, tame food success rate of 86.2% and 83.3%, respectively. Scherzeri different stocking large-sized fish cultivation test showed the highest survival rate of 50 / m3 and 100 / m3 density two groups, reached 100.0%; 300 / m3 minimum density group of 89.0%; 50 WPG tail / m3 density and a specific group of the highest growth rate, of 1.97% and 490.57%, respectively, minimum 300 / m3 density component, of 1.55% and 303.77%, respectively. Convolvulus floats in scherzeri large size fingerlings effect test results show, spinach floating bed can effectively reduce the + -N water NH4, NO2 - N content, with the increase of cultivated area, the purification effect is more pronounced; on the growth rate scherzeri also improved to some extent, but the effect was not significant. Scherzeri into polyculture fish ecology test results show, as the main support to scherzeri breed, with silver carp, bighead carp and grass carp ecological farming model achieved good breeding results. Per mu 596.3kg, wherein scherzeri total 350.5kg, silver carp, bighead carp and carp production reached 245.8kg, 95.22% survival rate, sampling specifications greater than 300g / tail reach marketable size.

This study carried out corresponding ecological breeding tests in three stages of breeding, fish breeding and adult fish culture, including seedling breeding test, artificial feed domestication and feeding test, different stocking density breeding of large-size species species test, hollow vegetable floating bed on the breeding effect of the large-size species of spot mackerel, and the ecological mixed breeding test of the spot-sin-seed edgy species since the implementation of the 2016 project. The experimental results of the seedling breeding stage showed that 6872 first-time hatched fish were cultivated in 20d, and the total harvest was 2.5 cm of the total length of the spot mackerel fry 5143 tails, with a survival rate of 74.83%. The results of artificial feed domestication and feeding test showed that when the stocking density of 3cm-long-form pheasants was 333 tails/m2 and 500 tails/m2, the success rate of domestication was 70.2% and 65.5%, respectively, and the stocking density of 5cm-length moat seedlings was 250 tails/m2 and 375 tails/m2, respectively, and the success rate of domestication was 86.2% and 8.3% respectively. The results of the experiment of breeding large-size species of plaque in different stocking density showthat that the survival rate is highest in the 50 tail/m3 and 100 tail/m3 density groups, both reaching 100.0%, and the lowest density group of 300 tail/m3 is 89. 0%; 50 tail/m3 density group has the highest weight gain rate and specific growth rate, 490.57% and 1.97%, respectively, and 300 tail/m3 density group is the lowest, 303.77% and 1.55%, respectively. The results of the test results of the hollow vegetable floating bed on the large-size species breeding of the spot-shaped species showthat that the hollow vegetable floating bed can effectively reduce the content of the water body NH4-N, NO2-N, and the purification effect is more obvious with the increase of the cultivated area. The results of the ecological mixed breeding test show that the ecological breeding mode of the spotfish as the main breeding species and the herring, the herring and the grass fish, has achieved good breeding results. The yield reached 596.3kg per mu, of which the total production of the spot fish 350.5kg, the total output of herring, herring and grass fish reached 245.8kg, the survival rate of 95.22%, the sampling specification is greater than 300g/tail, to reach the market specifications.

In this study, the corresponding ecological culture experiments were carried out in three stages: seedling culture, fish culture and adult fish culture, including seedling culture experiment, artificial feed domestication and feeding experiment, large-scale fish culture experiment with different stocking density, large-scale fish culture effect experiment of caviar floating bed on large-scale fish culture of Siniperca chuatsi and ecological mixed culture experiment of adult fish of Siniperca chuatsi Since the implementation, the common diseases and control methods in the process of seedling cultivation and cultivation of Siniperca chuatsi have been summarized. The results showed that 6872 newly hatched larvae were cultured for 20 days, and 5143 larvae with a total length of 2.5 cm were harvested, the survival rate was 74.83%. The results of artificial feed domestication and feeding showed that when the stocking density of Siniperca mandarin fish fry with a total length of 3cm was 333 tails / m2 and 500 tails / m2, the success rate of domestication was 70.2% and 65.5% respectively; when the stocking density of Siniperca mandarin fish fry with a total length of 5cm was 250 tails / m2 and 375 tails / m2, the success rate of domestication was 86.2% and 83.3% respectively. The results of the experiment of cultivating large-scale mandarin fish with different stocking density showed that the survival rate of 50 tail / m3 and 100 tail / m3 was the highest, reaching 100.0%; that of 300 tail / m3 was the lowest, 89.0%; that of 50 tail / m3 was the highest, 490.57% and 1.97%, and that of 300 tail / m3 was the lowest, 303.77% and 1.55%, respectively. The results showed that the content of NH4 + - N and NO2-N in the water body could be effectively reduced by the floating bed of the cabbage, and the purification effect was more obvious with the increase of the cultivation area; the growth speed of the mandarin fish was also improved to some extent, but the effect was not significant. The results of the ecological mixed culture of adult Siniperca chuatsi show that the main culture species is Siniperca chuatsi, which is combined with the ecological culture mode of silver carp, silver carp and grass carp. The yield per mu reached 596.3kg, including 350.5kg of Siniperca chuatsi, 245.8kg of silver carp, mullet and grass carp, with a survival rate of 95.22%. The sampling specification was more than 300g / tail, reaching the market specification.