Bullfrog eggs collection and hatching

First, the method of picking eggs. After fertilization, the bullfrog eggs are dispersed into a thin layer that adheres to the plants. The frog eggs are best harvested within 30 minutes of spawning. Therefore, during the bullfrog spawning season (late April to June), early in the morning, frog raisers should go to the frog pond pool for a week, especially in the morning when the big frog buzzes. If it is found that there are frog eggs in the pond, they should be picked up and hatched in the hatching pond immediately. The eggs cannot be left in the spawning pond for a long time so as to avoid the big frogs and the fish from swallowing. When picking eggs, it is best to put people in the water. Hand sharp scissors to cut off the plants under the egg membrane. Gently move one layer of frog eggs along with the attached eggs and the water into a clean container with inner walls such as wash basins and plastic buckets. When laying eggs, slowly place the egg container in the hatchery water, slowly tilt the container, and gently transfer the bullfrog fertilized eggs to the hatching pool water. Due to the softness of the film of bullfrog eggs, it is not appropriate to use dip nets for picking eggs. Second, the attention of eggs. One must keep the bullfrog's eggs floating in the water's direction, that is, the black spots (animal poles) face upwards; secondly, the frog eggs that are partially submerged by the big frog are buried in the underwater frog eggs and should be attached to the aquatic grass to float After the water is collected, the third is when picking the eggs, if you find that you are holding bullfrogs for love spawning, do not disturb them, and wait for them to spawn after the spawning and rowing. Third, the artificial hatching of frog eggs. The collected frog eggs should be quickly sent to the incubation pool for incubation, generally 5000-6000 eggs per square meter. The hatchery pond water is maintained at a depth of 30-40 centimeters and is preferably slow-moving. At a water temperature of 22-25[deg.] C., the fertilized bullfrog eggs can be hatched into pupa membranes after 3-4 days. Bombyx mori eggs require high levels of dissolved oxygen during hatching, and the amount of dissolved oxygen in the hatchery pool water is preferably kept above 5 mg/l. To this end, when hatching, on the one hand to keep the water fresh, dissolved oxygen to ensure more than 5 mg / l, it is best to use microfluidic water hatching; the other hand, do not let the hatching of frog eggs densely integrated group, so as not to avoid the dense part of the frog Eggs died of poisoning due to lack of oxygen and metabolites that did not diffuse easily. In addition, a shade shed must be set up above the hatching tank to prevent strong light from being exposed to sunlight and rainstorm showering pools, causing a significant increase in the temperature of the hatching pool and affecting the hatching of frog eggs.

Herbal Extracts

Botanical Extracts ,Natural Extracts ,Herbal Extracts

Vitajoy Biotech Co., Ltd. , http://www.suaminoacids.com