Elimination of fish predators on nursery Pond - Summary.docx.pdf

Elimination of pest, predators and nuisance weeds on nursery Pond Pest – is a plant or animal detrimental to humans or human concerns including crops, livestock, and forestry. The term is also used of organisms that cause a nuisance. -any unwanted organism that live in...

Elimination of pest, predators and nuisance weeds on nursery Pond Pest – is a plant or animal detrimental to humans or human concerns including crops, livestock, and forestry. The term is also used of organisms that cause a nuisance. -any unwanted organism that live in the pond. -it compet to the culturable fishes in feeds, dissolve oxygen and other nutrients in the pond. Predators - an animal that hunts, kills, and eats other animals Predators can be controlled using different methods: A. Pond poisoning or pesticides application. To be sure that all predators and unwanted species are eliminated, it is recommended to poison the pond. Poison or pesticides are applied by spraying it all over the pond bottom with at least 0.5 – 1.0-foot water. It is advised not to spray poison to a totally drained pond because when the poison stick to the soil, it is difficult to wash the pond. Kinds of pesticides: a. Organic b. Chemical  1. Biodegradable 2. non-biodegradable B. Mechanical removal. Draining and drying the pond normally eliminate predators. To induce fresh water species, which bury themselves in the mud to come out to the surface, let water to enter and subsequently drain after few days. Screen gates properly to prevent the entry of predators and other species of fishes. C. Chemical method. Pesticides should be resorted only when physical means of control failed or when days are cloudy and there is insufficient time for thorough drying. Organic pesticides are recommended because they are biodegradable. In using pesticides, it is important that one must read, understand, and follow instructions on the container carefully. Other Techniques in Eliminating/Controlling Pond Predators 1. Fine-Weave Netting -A net covering a fishpond is a physical barrier that prevents snakes from entering the pond and accessing its fish. 2. Fences 3. Fishstock guardians (Security guards) 4. PIR sensors to trigger a response to the unwanted arrival. 5. Automatic water-jets, such as the Contech Scarecrow, 6. Scarecrow 7. Birds Barriers (screen)