The effect of feed larvae Chironomus sp. and high pellet protein to seedling goldfish (Carassius auratus)

Abstract

Goldfish production increase in four years, specifically 66,823,000 in 2010 to 72,997,000 in 2014. The increment of goldfish production growth altogether with problems which is a discontinuity of fry stock. The solution for this problem is the purpose of this study, which is understood techniques in Goldfish (Carassius auratus) hatchery. The feed given to goldfish brood is blood worms (Chironomus sp. larvae) and pellets with a ratio of 50:50 as much as 3% of the biomass. Goldfish hatchery techniques involve broodstock cultivation, spawning techniques, larval development observation, and larval cultivation. Two kinds of Goldfish used, namely Oranda and Mutiara Goldfish. The results of Oranda goldfish spawning and Mutiara goldfish spawning consecutively are Fecundity 875 eggs, FR 94%, HR 91.83%, SR 93.04% and Fecundity 3850 eggs, FR 93.66%, HR 92.48%, and SR 91.10%. Larval development observation includes embryogenesis until post-hatched larval. Larval cultivation consists of giving various types of feeds, which are artemia nauplii (for 3-7 days old larval), Moina (for 7-14 days old larval), and blood worm or tubifex (> 14 days old larval). Fertilized goldfish eggs will develop through several phases, including zygotes, initial cleavage, blastula, gastrula, segmentation, pharyngula, egg hatching, and development of larvae after hatching.

Gastropod Community Structure as Environmental Change Signals for Tropical Status In Sedati Waters, Indonesia

“…Temperature is the same as salinity, having a positive relationship with an abundance of gastropods (Cabuk et al, 2004;Dwiardan et al, 2020;Damayanti et al, 2020). Garg et al (2009) revealed that high water temperature caused increased decomposition so that the amount of organic matter and macrophytes increased.…”

Providing feed from a mixed of chicken broth and chicken manure with different dosages on nutritional content Daphnia magna

“…If the water quality of the maintenance media is appropriate, it will support the cultivation of Daphnia magna. [29] states that cultivated organisms will eat as much feed as they get and will grow rapidly if the water quality is good and suitable for life, on the contrary if the water quality is poor, it will cause the cultured organisms to be stressed and disturbed so that their nutrient absorption will be reduced [30].…”

Analysis of high protein feed on the maintenance of tilapia (Oreochromis niloticus) broodstock in brackishwater culture

“…Maintenance techniques for Tilapia broodstock included pond preparation, broodstock preparation, broodstock selection, broodstock feeding, water quality management, and pest and disease control [13] [14]. Tilapia can be produced in different farming systems and scales with higher or lower dependence on inputs, especially feed.…”