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Journal of Aquaculture Science
Published by Universitas Airlangga
ISSN : 25500910     EISSN : 25794817     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Journal of Aquaculture Science (JoAS) merupakan media pertukaran informasi dan karya ilmiah pada bidang Akuakultur meliputi teknik budidaya, teknologi, reproduksi dan penyakit ikan pada budidaya. Secara umum, Journal of Aquaculture Science menerima artikel hasil penelitian review artikel dan komunikasi singkat. Journal of Aquaculture Science terbit 2 kali dalam setahun (April dan Oktober).
Arjuna Subject : -
Articles 212 Documents
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Bioflokulan Materials from Carrageenan and Agar on Seaweed Harvesting Process of Phytoplankton Dunaliella salina Annur Ahadi Abdillah; Mochammad Amin Alamsjah; M. Nur Ghoyatul Amin
Journal of Aquaculture Science Vol 3 No 2 (2018): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v3i2.55

Abstract

Harvesting microalgae is an important part in the culture system to produce higher crop biomass. Microalga Harvesting can be done by several techniques such as centrifugation, filtration, sedimentation, flocculation, ultrasonic vibration, and using filter. The technique currently used on an industrial scale is flocculation. This technique is used because it is more quickly and efficiently. Flocculants safe materials are polymers of polysaccharide seaweed. The study was conducted to determine the efficiency of the use of flocculants from alginate, carrageenan, so that the flocculation process microalgae Dunaliella salina. Flocculation process at the 50-minute show flocculation by material alginate by 30.52%, 22.85% by carrageenan, 11 % by Agar, plankton without flocculation make flocculates only amounted to 3.96%. Flocculation process at 240-minutes unchanged where carrageenan increased flocculation becomes 39.84%. Agar increased to 31, 48%. Plankton added flocculant alginate did not experience significant changes that just turned into 30.89%. The research results Show best flocculation activity is carrageenan where flocculation speed equal to alginate that has been frequently used as flocculants.Keyword : Dunaliella salina, flocculants, Carrageenan, Alginate, Agar
Conversion Rate and Feed Efficiency of Silver Pompano Fish (Trachinotus blochii) With Different Frequency Giving Ibrahim Saputra; Wiwin Kusuma Atmaja Putra; Tri Yulianto
Journal of Aquaculture Science Vol 3 No 2 (2018): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v3i2.56

Abstract

The value of conversion rate and feed efficiency is a parameter for determining the quality, treatment, or feed given to the growth of Silver Pompano (Trachinotus blochii). The purpose of this study was to determine the effect of feeding frequency on feed conversion and efficiency and survival of Silver Pompano. The research method used was a Completely Randomized Design (RAL) with 3 treatments (Control namely feeding once a day, A was feeding 2 days, and B was feeding once every 3 days) with 3 replications. The best results were K treatment at 2.11 g (feed conversion ratio), 47.32% (feed efficiency), and 100% (survival). The conclusion of this study is that the treatment given during the study by ANOVA analysis did not give a significant effect on the conversion value and feed efficiency. Feeding with a frequency of 1 time a day (control) shows the best weight growth and can be applied to cultivation. Keywords: conversion rate, feed efficiency, Silver Pompano
The Effect of different Stocking Density on Ammonia Content (NH3) and Nitrite (NO2) in Catfish (Clarias Sp.) with Biofloc Aquaculture System Ahmad Nizar Fanani; Boedi Setya Rahardja; Prayogo .
Journal of Aquaculture Science Vol 3 No 2 (2018): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v3i2.57

Abstract

The accumulation of waste in aquaculture can cause inorganic toxins  named ammonia (NH3) and nitrite (NO2) in water. Biofloc technology is one of the new alternative to solve the problem of ammonia (NH3) and nitrite (NO2) in aquaculture techniques adapted from sewage treatment. This study aims to determine the effect of stocking density of catfish (Clarias sp.) using biofloc system against ammonia and nitrite. This study used an experimental method to completely randomized design (CRD). Statistical analysis using Analysis of Variant (ANOVA) to determine the effect of treatment.The results of the study showed that the effect of stocking density of catfish (Clarias sp.) were significantly different (P <0.05) against ammonia (NH3). The lowest average production levels of ammonia (NH3) was the PO treatment (stocking density 15 fishes/15 L) of 0.1689 ± 0.0052, and the highest was treatment P3 (stocking density 30 fishes /15 L) of 0.1819 ± 0.0016. Effect of stocking density of African catfish (Clarias sp.) was not significantly different (P> 0.05) to nitrite (NO2). The lowest average content of nitrite production (NO 2) was the PO treatment (stocking density 15 fishes/15 L) of 0.0358 ± 0.0028 and the highest was P3 treatment (stocking density 30 fishes/15 L) of 0.0388 ± 0.0042. During the culture. temperature was  26,4-29,70C, dissolved oxygen was 5.2 to 8.3 mg / L and pH between 7.01 to 8.66. Keywords : Biofloc, ammonia, nitrite
The Effect of Immersion Duration in Thyroxine Hormone on Growth of Snakehead Fish Larvae (Channa striata) Muslim Muslim; Ade Dwi Sasanti; Apriana Apriana
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.63

Abstract

The aim of this research was to determine the best immertion duration to increase growth rate of snakehead fish larva. The research was conducted in Fish Breeding unit Batanghari Sembilan Indralaya, Kabupaten Ogan Ilir. This research used a Completely Randomized Design (CRD), with five treatments (0, 12, 24, 36, and 48 hours of immertion), with three replications. The parameters observed were growth, survival rate and water quality. The results of  this research show that the highest growth rate found in the 24 hours of treatment  with the average value of 0.17 g of weight and increase in length of 1.90 cm. The best survival contained in treatment of immersion for 36 hours with the average value of 71.67%. Key words: snakehead larvae, thyroxine, growth, immertion
Inhibition potency of drumstick leaf extract (Moringa oleifera) towards Aeromonas hydrophila: Preliminary Study for Aeromoniasis Treatment. Hapsari Kenconojati; Nina Rofi' Rukman
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.64

Abstract

The aim of this study was to know antibacterial potency of ethanolic extract of drumstick leaf against Aeromonas hydrophila in vitro. Total flavonoid, alkaloid, tannin and saponin of the ethanolic drumstick leaf extract were analyzed using spectrophotometry. Antibacterial activity test was carried out by disk diffusion and tube dilution method. Ethanolic extract of drumstick leaf contained flavonoids total as 71.9 mg quercetine equivalent/g, alkaloids total as 3 mg quinine equivalent/g, tannin as 24.7 mg tannic acid equivalent/g and saponin as 44.4 mg/g. The result of antibacterial test showed significant inhibition of Aeromonas hydrophila by drumstick leaf extract (P<0.05). The highest inhibition zone was produced by drumstick leaf extract with concentration of 100% which is 9.9± 0,162 mm. The minimum inhibition concentration (MIC) of drumstick leaf extract is 3.125%, while the minimum bactericidal concentration (MBC) is 6.25%. Based on this study, it can be concluded that drumstick leaf can be used as an alternative natural product of antibacterial agent which can be applied especially in aquaculture.
Fluctuation of Asymmetry of Hybrid Cantang Grouper (Epinephelus fuscoguttatus x Epinephelus lanceolatus) Originating from Situbondo and Bali Lailatul Lutfiyah; Darmawan Setia Budi
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.65

Abstract

Asymmetric fluctuations function as a measure of organ stability in pairs in an individual. This study aims to determine the value of asymmetric fluctuations in hybrid grouper hybrid fish from Situbondo and Bali. The study was conducted for 3 months, starting from July-September 2018. The grouper used in this study was 100 individuals from each region, with a size of 7-9 cm. Bilateral meristic characters measured include the pectoral fin, ventral fin and lateral line. The results showed that the ventral fin character of the grouper fish from Situbondo and Bali had a higher FA value of 0.6-0.7, while the lateral linea organ had a higher FAm value, 1.1 to 1.9. The FAgb value of the grouper originating from Situbondo has a high value compared to the grouper from Bali, which is 1.5-2.4.
Comparison of the number and distribution of chromosomes of three varieties of Nile tilapia (Oreochromis niloticus) Darmawan Setia Budi; Lailatul Lutfiyah; Arif Habib Fasya; Prayogo Prayogo
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.66

Abstract

The aims of this study is to determine the number and distribution of the chromosomes of three Nile tilapia (Oreochromis niloticus) varieties as basic information in the process of identifying the characteristics of varieties in tilapia. This research was conducted in August-October 2016, at the Unair Banyuwangi PSDKU laboratory. The research procedures included rearing of test fish, immersion of test fish with colchicine solution and tissue preservation, preparation of preparations and staining, and observation. Based on the results of the study, it was found that each variety of tilapia (black, red, and white) showed a difference in the spread of chromosomes, while the number of chromosomes was the same, namely 44 pieces.
The Effect of Giving Combination Concentration of Leaves of Moringa oleifera with Walne Fertilizer in Culture Media on the Growth and Content of Carotenoids in Dunaliella salina Nurita Wahyuni; Boedi Setya Rahardja; Muhammad Hanif Azhar
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.67

Abstract

The purpose of this study was to determine the effect and optimal dose of addition of Moringa oleifera leaf extract on culture media to the growth and content of carotenoids of Dunaliella salina. The research method used was experimental with Completely Randomized Design (CRD) as the experimental design. The treatments used were different doses of Moringa leaf extract, namely A (100% walne media), B (75% Media walne + 25% Moringa leaf extract), C (50% Media walne + 50% Moringa leaf extract), D ( 25% Media walne + 75% Moringa leaf extract), E (100% Moringa leaf extract) with a dose of Moringa leaf extract that is 28 ml (100%) with repetitions 4 times. The results showed that the addition of Moringa oleifera leaf extract had a significantly different effect (P <0.05) on growth. Based on the density of Dunaliella salina showed the best treatment, namely at treatment B (75% walne + 25% Moringa extract). The best specific growth rate is found in treatment B (75% walne + 25% Moringa extract). The carotenoid content after treatment was not significantly different (P> 0.05) so that the carotenoid content in the control (treatment A) had the highest level of 1.39 µg / ml and the lowest was in treatment C of 0.19 µg / ml.
Parasites Inventory in Freshwater and Seawater fish at Fish Quarantine Center and Quality Control of Fisheries Product in Surabaya II Alvin Avia; Suciyono Suciyono; M.F. Ulkhaq
Journal of Aquaculture Science Vol 4 No 1 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i1.68

Abstract

One disease that often attacts fish is a group of parasites or parasitic diseases, parasites are not only dangerous because they are related to their activities, but also trigger the emergence of other pathogenic organisms and cause infections. Therefore, it is necessary to take fish quarantine measures to prevent the spread of diseases carried out by fish quarantine centers. This study was conducted to determine the type of parasite that infested fish samples and determine the prevalence and intensity of fish samples. A total of 48 sample fish consisting of freshwater and seawater fish were analyzed in the laboratory of Balai Karantina Ikan, Pengendalian Mutu dan Keamanan Hasil Perikanan Surabaya II during December - January 2019, either directly or directly (ectoparasites and endoparasites). Parasitic identification was carried out visually and microscopically with an approach based on identification books. The types of parasites that we found during the study consisted of Argulus sp, Trichodina sp, Anisakis sp., Gnathostoma spinigerum, and Gnathostoma spinigerum. The highest prevalence in Scomber Scombrus with Anisakis sp. Amounting  to 77.8%, mean while, the lowest prevalence and the intensity is found in Thunnus sp. The prevalence and intensity of parasites are influenced by water quality and pollution.
Escherichia coli and Salmonella sp. On Fishery Frozen Products at the Fish Quarantine, Quality Control, and Fisheries Product Safety Center Surabaya II, East Java Santika Dwi Christanti
Journal of Aquaculture Science Vol 4 No 2 (2019): Journal Of Aquaculture Science
Publisher : Airlangga University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31093/joas.v4i2.69

Abstract

Frozen fishery products are a type of commodity with varying levels of development, both in whole and in the form of pieces. Fishery products are foodstuffs that are very easily contaminated with pathogenic microbes that can cause food poisoning and cause disease outbreaks in consumers. This study aims to find out the different types of pathogenic bacteria that contaminate fishery frozen products. The fishery frozen products studied came from tuna, mackerel, mollusks and crustaceans. Examination of Escherichia coli bacteria using the METHOD ISO 16649-3:2015 and Salmonella sp bacteria. It uses iso 6579:2002. The results of tests that have been done can be known that frozen fishery products there are positively contaminated and negative contaminated with Escherichia coli and Salmonella sp.

Page 12 of 22 | Total Record : 212

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