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Showing posts from July, 2022

A common parasitic disease which cause problem in carp farming - Fish lice ( argulus sp).

Hello everyone:            Today we will see about the common parasite infection fish lice which is caused by argulus species.  Carp farming:            Polyculture of carps is common in all over India. Different species, different feeds, different environmental parameters causes various problems in aquaculture sector.  Fish lice :            It is a parasitic infection which is caused by argulus species. Argulus is a crustacean parasite which undergoes different lifestages. This parasite attached to the skin and scales of the fish and continually sucks the tissues and blood from host body.                It gives more irritation to the fish. It causes wound and leads to secondary bacterial and viral infections.   Life stages:               Argulus species like Argulus stamensis, Argulus japonicus are mostly causes secondary infection to the host.                            Argulus            Attached to the host body                   Develop into adult                            Eg

Best stocking densities for polyculture of carps.

Hello everyone:           Today we will see about the optimum stocking ratios of IMC and CMC in polyculture.  1. Species selection:          Select the species which have high local market price in your area. If I select catla, rohu, grass carp, common carp then we have to fix the ratio of stocking.  2. Are you able to do supplement feeding?           We have to fix the stocking densities based on this question also.          If your pond have more organic matter or you are using more organic manure in your pond? Then you can stock Common carp and mrigal Or tilapia in 30-40%.          If you are stocking grass carp and rohu in high numbers, the wastes of herbivores can be easily digested by common carp.          Silver carp is very useful to control algal blooms and reduce the oxygen depletion during night times.           Catla with 10-15% , rohu with 30-40%, mrigal 10-20%, grass carp 10-20% and rest of common carp is preferable. Most of the places silver carp not have sufficient mark

How to select a perfect site for vannamei farming?

Hello everyone:    Today we will see about different ways to select an perfect site for vannamei farming.      This blog will help for beginners for selecting site.  * P.vannamei is commonly cultured around the world due to its adaptability and growth.  * Most of the persons showing intrest to do farming.  Some of the common questions to select an better site.  1. Select the species for culture.       If I selecting p.vannamei , then I have to select saline water area for better performance.  2. Soil texture and soil type ( clayey sandy or clayey loamy soil better for maintaining good primary productivity)  3. Better to avoid sandy sites. ( Problems occurs by turbidity, problems in nutrient storage etc..)  4. If it is coastal area, we have to analyse about high tide in that region.  5. Locate the best water sources and analyse water quality. If using sea water, better to check bacterial loads at regular intervals.  6. If you are using bore water, the checking of water quality at regu

Must needed pond in farm - ETP.

Hello everyone :         Today we will see about effluent treatment pond management and it's need.  What is the need?         Direct pumping of waste water into outside will causes,  * Environmental issues like Eutropication, accumulation of excessive organic load, which affects production and life of essential primary producers.  * It creates BOD, COD problems which affects the growth of other aquactic organism in creek or river.  * If you used any chemicals, then discharge of this water affects the water quality.  We can tell many environment issues.......  * Disease prevalence.  * Untreated discharge of water into outside will be the root cause of disease prevalence. It affects other farms also. ETP will helps you..    ETP to farmers: Hi, I am ETP pond, pls construct me 🙂 in your site.  Farmer to ETP pond: why? Why I have to construct?  ETP to farmers : I will give you money from your farm waste. Farmer to ETP : what? 😳 How?  ETP to farmer : Pls read below and share this blog