GREEN MUSSEL (Perna viridis) AND SILKWORM (Tubifex sp.) FEEDING TRIAL AS AN ALTERNATIVE FEED FOR CRAYFISH SEEDS (Cherax Quadricarinatus)

The high cost of shrimp or lobster feed is also a problem in the sustainability of aquaculture, even though freshwater crayfish, including eaters, require proper and relatively cheap feed selection. One source of feed that can be used as an alternative is green clams and silk worms. This study aims to determine which feed is better and more affordable for freshwater lobster seeds, so that the sustainability of cultivation can be well maintained in terms of economy, quality and quantity. The method used was descriptive comparing between the two feeds given a dose of each treatment, namely 10% of the lobster seed biomass, then analyzed using a 95% confidence level t-test. The results showed a significant effect (P <0.05), on the absolute length growth and absolute weight of freshwater lobster seeds. The absolute length of the seeds given green shellfish feed is 0.94 ± 0.38 cm and silkworm feed is 0.66 ± 0.27 cm, for the absolute weight of green shellfish feed is 5.11 ± 0.38 gr and silk worm feed 2.68 ± 0.18 gr. The best results from the two feeding treatments for freshwater lobster seeds were using green shellfish feed with an absolute weight value of 5.11 ± 0.38 gr and the absolute length is 0.94 ± 0.38 cm. So that green shellfish feed can be used as a better alternative feed for the cultivation of freshwater lobster seed enlargement

GREEN MUSSEL (Perna viridis) AND SILKWORM (Tubifex sp.) FEEDING TRIAL AS AN ALTERNATIVE FEED FOR CRAYFISH SEEDS (Cherax quadricarinatus)

The high cost of shrimp or lobster feed is also a problem in the sustainability of aquaculture, even though freshwater crayfish, including eaters, require proper and relatively cheap feed selection. One source of feed that can be used as an alternative is green clams and silk worms. This study aims to determine which feed is better and more affordable for freshwater lobster seeds, so that the sustainability of cultivation can be well maintained in terms of economy, quality and quantity. The method used was descriptive comparing between the two feeds given a dose of each treatment, namely 10% of the lobster seed biomass, then analyzed using a 95% confidence level t-test. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The results showed a significant effect (P &lt;0.05), on the absolute length growth and absolute weight of freshwater lobster seeds. The absolute length of the seeds given green shellfish feed is 0.94 ± 0.38 cm and silkworm feed is 0.66 ± 0.27 cm, for the absolute weight of green shellfish feed is 5.11 ± 0.38 gr and silk worm feed 2.68 ± 0.18 gr. The best results from the two feeding treatments for freshwater lobster seeds were using green shellfish feed with an absolute weight value of 5.11 ± 0.38 gr and the absolute length is 0.94 ± 0.38 cm. So that green shellfish feed can be used as a better alternative feed for the cultivation of freshwater lobster seed enlargement

KUALITAS AIR DAN STATUS KESUBURAN PERAIRAN DI TELAGA NGIPIK, WADUK BUNDER DAN TELAGA DOWO DI KABUPATEN GRESIK

Ngipik, bunder and dowo reservoirs or dowo are one of the repositories in Gresik regency located in the center of the city that has been utilized by the community for industrial, agricultural and domestic purposes, while also being used for tourism purposes. The study aims to determine water quality and evaluate the status of water fertility in three reservoirs/lakes (Ngipik, Bunder and Dowo) in Gresik district. The research activities were carried out from 16 to 20 July 2019. The data collection method used a survey method with stratified random sampling at three different stations. The results of water quality measurements show that overall that the water quality in the three reservoirs/ponds is still good for aquaculture activities except Ngipik Lake based on phosphate values of 0.75 - 3 ppm can be categorize including the status of dense eutrophic waters so specific management plans are needed to optimize its utilization. Whereas in the Bunder reservoir and Dowo ponds, the phosphate content has not detected, so its water status is oligotrophic

The Utilazation of Fisherman Catch for Nugget Product

The fisheries sector is essential for the nourishment for marine life of coastal communities, use of fishery resources into livelihood of fishermen. In connection with that, this activity aims to increase the sale value of shrimp through counseling activities shrimp nuggets processing and product diversification. The method used is counseling and mentoring activities to produce diversified products which are followed by partner groups, especially women and housewives, as well as surrounding communities who have the desire to become entrepreneurs. The result is processed into products such as nuggets. The conclusion is that the shrimp commodity has a profitable business opportunity by increasing the selling price, so that it can increase the income of the community in the Kroman Village, Gresik District, Gresik Regency