Study On Biology Characteristic And Breeding Technology Of Lamprotula Leai In Dongting Lake Area

This article in Hunan Huaron East Lake and Dongting Lake's Lamprotula leai resources distribution and its environment in the investigation research foundation, studied the gathering freshwater mussel's biology characteristic, and by the manual simulation Lamprotula leai environment condition, carried on domesticates the cultivation experiment, was for the purpose of discussing its biology characteristic as well as the artificial domesticated theory and the technology and so on the age, growth, life habit, feeding habits, shape characteristic, reproduction characteristic, for the reclamation and the protection Lamprotula leai waters ecological environment, multiplied and uses this resources development high grade has the nucleus bead provides the scientific material. The findings indicates:1 , South Dongting Lake and Huaron East Lake's Lamprotula leai resources all seriously reduces, but Huaron East Lake 2 meters above water deep places Lamprotula leai resources quantity is slightly for many. Two places water bodies float the biomass are more, diatom, hides the algae is in the majority, the Lamprotula leai is basic is takes the main food by these two big algae gate. The resources quantity drops the main reason should be each place electric power overflows to catch creates.2, Lamprotula leai carries on the age appraisal to 61 fishing for back lumps, 4, 5, 6 ages occupy the proportion correlation are high, 1 age does not have, 2, 8 ages are least. The young age freshwater mussel few main reasons, possibly are the hook are bigger, on hooks with difficulty; Also possibly is when electric power fishing for dies by the electric shock.3 , Part exterior growth essential factor of mature Lamprotula leai to carries on the survey and the statistical analysis, to find Lamprotula leai's shell long and shell high and shell width can grows along with the weight and the age increase, but to reach the certain degree, increases heavily besides the shell, other each growth essential factor nearly does not grow.4, Analysis thing of intestines indicates, Lamprotula leai has the certain selectivity to food, no matter which kind of algae is occupies thesuperiority in breeds the waters and the natural waters, , it all is take the diatom as main food.5> Through carries on the survey and the analysis to Lamprotula leai shape characteristic^ obtains it has many different characteristics with other Freshwater mussel, the color is from shallowly to depth, gradually turns the vandyck brown by the yellow with age , the body weight and each kind of characteristic size all is growing, the mature Lamprotula leai back appears one peak two valleys, but the infant Lamprotula leai do not appears, the majority of its annual ring is obvious, generally exudes for the cream color red in shell inside. 16 Lamprotula leai on left and right shell weight to carries measures , to find Lamprotula leai right shell is common heavy and thick. The Lamprotula leai individual pulp is not certainly heavy, the infant Lamprotula leai occupies the proportion correlation is high, but the mature Lamprotula leai pulp weight only accounts 10-13% for the live body weight, but the shell heavy accounts 65-76% for the proportion reaches.6> Lamprotula leai is a kind of dioecisms freshwater mussels.The eggs mature in March and begin pregnancy in April. The pregnancy contents are about 300,000-500,000 ,they were distributed on all the four gills.7> The water temperature is 10-33°C, the pH value is 6.5-8.0, the diaphaneity is 45-100 cm, alkalinity is 2-3N,and the total hardness is 2.5-7.5N, the contents of Ca2+ are 15-40mg/L, the contents of Mg2+ are 5-15mg/L, the contents of SiC>2 are 1.0-8.0mg/L, which are the most adaptive water condition for Lamprotula leai In the Artificial breeding experiment,Its superiority food biology population is Bacillariophyta > euglenophyta> protozoon, The infind Lamprotula leai is suitable hangs raises in the pond> the lake> the drainage ditch.Lamprotula leai in general cultivation waters slow-growing, about one month only can grow 0.8-2g, the mature Lamprotula leai grows slowly.