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All Journal Indonesian Journal of Tropical Aquatic
Mujtahidah, Tholibah
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Agriculture, Biological Sciences & Forestry

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THE INFLUENCE OF CONCENTRATION LIQUID WASTE OF TOFU PRODUCTION TO DAPHNIA SP CULTIVATION BIOMASS Mujtahidah, Tholibah; Kusuma, Baruna
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Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v2i2.11148

Abstract

A natural feed of freshwater fish as long as it depends on worms tubifex is hard to be cultivated. Daphnia sp is one of the kinds of Cladocera zooplankton to be an alternative as a natural feed for seed of fish. The liquid tofu waste generally is a problem that is going on in every regional particularly around the Kedu Residency, Central Java. The liquid waste has the nutritional value that can be used for cultivation Daphnia sp. The right concentration of liquid waste tofu to the cultivation of  Daphnia sp. has not been studied. This research aimed to find out the influence of concentration out over the density of waste biomass and the visibility of morphology Daphnia sp. The experiment used Complete Randomized Design (CRD) with three treatments and three repetitions, 25:75, 50:50, dan 75:100 (TI, T2, and T3, respectively), tofu liquid waste and water.  The results concluded that T3 has repercussions for the density and biomass Daphnia sp. The density of Daphnia sp. was shown by treating 75 % of liquid tofu waste with 31.33 ind L-1 on average and while biomass was 4.6 g L-1 on average. The visibility of Daphnia sp morphology was cultivated with liquid tofu waste compared with Daphnia sp. cultivated using wastewater of catfish cultivation as a control group.Keywords: Biomass, Daphnia sp., Liquid tofu waste, Present of morphology
THE REPRODUCTIVE CYCLE OF PUNTIUS BINOTATUS ON THE MIDDLE OF THE RAINING SEASON Mujtahidah, Tholibah; Marsoedi, Marsoedi; Widodo, Maheno Sri
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Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v2i1.9678

Abstract

Spotted barb (Puntius binotatus) is one of tropical fish in Indonesia freshwater, which has high economic value. To maintain the stock in nature, information about the reproduction cycle in the mid raining season is required for conservation so that we can control the catch of spotted barb. This study aimed to examine the effect of raining season on GMS, GSI and GI?s male and female. Observation methods were used as a tool to collect the data. The result of the research showed that a variety of GMS, GSI and GI?s male and female. Quantity of oocyte primer 423; 664; 480; 380; meanwhile that quantity of oosite secondary oocyte 73; 172; 411; 230. Result of water quality measured in the river as temperature 28-30oC, pH 6,8-7 and Dissolved Oxygen (DO) 3-3,4 ppm. The gonad weightgreatly influenced the rate of GMS, GSI, and GI in determining fish reproductionwas interrelated and directly proportional. Increasing of GMSwas affected by the increasing value of GSI and similarly the GI value which is directly proportional with increasing of GSI and GMS. The reproductive cycle of gonadal maturity spotted barb increased during themid rainy season.
Co-Authors Kusuma, Baruna Maheno Sri Widodo, Maheno Sri Marsoedi Marsoedi