Selasa, 15 Juni 2021

Focus on Quality of Shrimp Fry

Focus on Quality of Shrimp Fry


In order to produce quality and healthy vannamei, very strict biosecurity and quality control (QC) must be applied, including the quality of shrimp fry

Bali, was once known as a centre for grouper and white snapper culture. At the moment, many farmers are starting to move or switch to other commodities, such as vannamei shrimp. However, culturing shrimp is not only about investing in ponds, but also all of the connected aspects.


Shrimp qualilty, starting with the fry quality, which must also be considered with precision. As stated by Yudi Hermawan, Manager of PT Sukses Abadi, a shrimp farm that located in Sukadana Village, Kubu District, Karangasem Regency, Bali. He explained, shrimp culture is not just a bandwagon attempt and farmer should not be complacent to do it.


“In the farms, technical and non-technical factors must be balanced. Here, we have been exposed to all kinds of diseases, but we have learned a lot from there,” said Yudi, who applies a stocking density of 250 shrimps per square meter (m2) in the ponds he manages.

Quality fry for quality production
Dani Jatnika, HOU Shrimp Hatchery PT STP Singaraja Bali agreed up the serious culture techniques. According to him, 'jumping' into shrimp culture must be really thorough and detailed, especially from the fry quality. Moreover, this friendly man also explained that the development of virus challenges from year to year is increasing.


In hatcheries, for example, many farmers apply special conditions for broodstock into hatchery installations. In 2015, broodstock can enter the hatchery installation, with enough to be declared free of five types of viruses. “Now (from 2016 to 2021), there have already been 9 viruses spreading. The development of the virus is fast. So, if from the broodstock that we ordered there are indications of the virus and are positive, they must be destroyed immediately, "said Dani.


Dani then continued that, it is not an easy matter to continue to exist 'investing' in the upstream sector. In addition to quality feed for broodstock which is still limited (including cultivated worms), fungal diseases, lethargy (fatigue), also viruses are still lurking. "At the beginning of the process, we were dealing with mushrooms," said Dani.


Teguh Arifin from Quality Control (QC) hatchery PT STP Singaraja said that the application of biosecurity was really tightened. Water quality is the main parameter for the success of naupli production. “First, we check the quality of the water, from the incoming water, the treatment to the reservoir and before the water is distributed. Parameters of nitrite, ammonium, temperature, sedimentation and more. Before the water is added to the ready-to-use reservoir, it must be deposited for at least six hours,” explained Teguh.


Then second, continued Teguh, microbiological checks at all activity points were carried out. Third, checking the carrier media, the parent itself. Before the parent is quarantined, water checks, microbiology, PCR, are also virus free.


Not to forget, said Teguh, the quality of feed is also controlled. Feeding is done 6 times a day, a maximum of 30 percent of the biomass. Feeding in the form of worms was propagated to the female parent (by 60%) for gonad maturation. As for the male parent, the squid is propagated.


In addition, which does not escape from QC is egg fertility, temperature, degree of fertilization to egg hatchability are also controlled. The next process is scoring/grading naupli which is done in the morning. Naupli scoring parameters include Hatch Rate, activity, deformity (completeness of organs), body length. "The calculation uses a point system. Eligible to send to the larval unit, if entered in grades a, b, c. And a good naupli, it responds to light," explained Teguh. Trobos/ning-denpasar





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