Journal of Aquaculture Science

Front Matter

2024-05-12T15:34:02+07:00

Back Matter

2024-05-12T15:34:43+07:00

Phagositosis Index (PI) Value and Total Vibrio Count (TVC) Of Litopenaeus vannamei in Intensive Pound

2024-03-01T13:50:25+07:00

Whiteleg shrimp (Litopenaeus vannamei) is one of the main fishery commodities since it has a high economic value. Vaname shrimp cultivated is done intensively where the stocking density and the amount of feed required are high. High stocking densities can trigger stress, increase possibility of physical contact among shrimps, and the spread of disease in shrimp becomes faster. The most common shrimp disease is Vibriosis where whiteleg shrimp are infected by Vibrio sp.. Whiteleg shrimp has an innate immunity system thus hemolymph has an important role in shrimp body defense. In this study, the research method used was purposive random sampling and was conducted from August to September 2023 by 50 shrimps sample. Assay of phagocytosis index (IF) which is a cellular response of the vaname shrimp body defense system was conducted at the Center for Brackish Water Aquaculture (BBPBAP) Jepara by applying a bacterial suspension of Staphylococcus sp. which has been attenuated and bacterial staining. Calculation of Total Vibrio Count (TVC) was conducted at the Laboratory of Bacteriology and Mycology, Faculty of Veterinary Medicine, Universitas Airlangga, by using TCBS (Thiosulfate Citrate Bile Salt Sucrose Agar) agar media from Vibrio sp. bacteria cultured from the hepatopancreas of shrimp samples. The results showed that vaname shrimp cultured in intensive ponds were infected with Vibrio sp. with a TVC value of 3.3x10⁵ cfu/ml and an IF value of 0.87.

Intensity and Infestation Degree of Ectoparasite on White Leg Shrimp (Litopenaeus vannamei) Cultivated in Intensive Ponds

2023-11-30T00:42:24+07:00

White leg shrimp (Litopenaeus vannamei) is a widely cultivated commodity in Indonesia. The high demand of white leg shrimp requires increased production. High stocking density in intensive cultivation and excessive amounts of feed are obstacles in white leg shrimp productiom. It will cause the shrimp to become stressed and susceptible to pathogen attack , one of them is ectoparasite. This research was conducted from August to September 2023 with the aim of determining the intensity and infestation degree of ectoparasite on white leg shrimp that cultivated in intensive ponds. The samples of white leg shrimp in this study were 50 individuals by purposive random sampling method. Observations were carried out by natif method in the Cultivation and Anatomy Laboratory, Faculty of Fisheries and Marine, Airlangga University. The results showed that white leg shrimp cultivated in intensive ponds were infested by Zoothamnium sp. with intensity 184 individuals/head, Vorticella sp. with intensity 268 individuals/head and Epistylis sp. with intensity 235 individuals/head. Each ectoparasite has a very severe infestation degree

Concentration Of Honey As A Coating In Dry Storage on Ephipia Hatchability and Survival rate of Moina macrocopa nauplii

2023-10-03T15:23:19+07:00

Moina macrocopa is natural feed that commonly found in tropical waters. Ephippia can be stored and hatched at any time. Embryo stability can be protect by controlling the water content through coating technology. Honey solution can be used as a coating that have a osmotic regulation for prevent embryo from drought while ephipia entering the dormant stage. This research aims to determine the effect of concentration on the hatchability of ephipia and the survival of M. macrocopa nauplii. The research method used in this study was experimental with a completely randomised design (CRD) using five treatments and four replications. The results showed that coating ephipia using honey had a significantly different effect on the hatchability of M. macrocopa ephipia (p<0,05). However, the concentration of honey was not significantly different on the survival of M. macrocopa nauplii.

Keywords : Ephipia, Honey, Moina macrocopa, Coating

Case report; Identification of Bacteria in Catfish (Pangasius sp.) at the Palembang Fish Quarantine Station

2024-02-22T09:53:14+07:00

One of the causes of disease attacks can be caused by bacteria, two of which are Edwardsiella ictaluri and Streptococcus agalactiae which often attack catfish. One of the causes of disease attacks can be caused by bacteria, two of which are Edwardsiella ictaluri and Streptococcus agalactiae which often attack catfish. Disease attacks can be prevented as early as possible by periodically identifying certain bacteria so that it can facilitate appropriate treatment to prevent them. This activity aimed to study bacterial identification techniques in catfish (Pangasius sp.) at the Fish Quarantine Station for Quality Control and Safety of Fishery Products in Palembang. The method used in this activity is quantitative by field observation and collecting primary and secondary data. Activities carried out include the preparation of tools and materials. Media creation, test sample preparation, bacterial isolation, bacterial purification, basic tests, biochemical tests, and instrument digestion. The approach was carried out through basic tests and biochemical tests. Data analysis was presented in tabular form and discussed descriptively. Results: There were no bacteria with the characteristics of Edwardsiella ictaluri and Streptococcus agalactiae found in catfish observed from December 2022 to January 2023.

The Effect of Addition of Fermented Gamal Leaf Flour (Gliricidia sepium) in Feed on Seed Growth Freshwater Pomfret Fish (Colossoma macropomum)

2024-04-04T10:37:42+07:00

Gamal leaves have good potential to be used as an alternative feed ingredient for herbivorous and omnivorous fish species. The aim of this research is to determine the effect and optimal dose of adding fermented gamal leaf flour as a feed ingredient on the growth of freshwater pomfret seeds (Colossoma macropomum). The test fish used in this study were freshwater pomfret fish (C. macropomum) with a body length of 6.3–7 cm and weight of 2.6–4.12 g. Experimental fish were maintained at a stocking density of 10 fish/container for 40 days. Feeding is carried out at 07:00 WIB, 12:00 WIB, and 17:00 WIB. The research method used a Completely Randomized Design (CRD) method with six treatments and three replications. Treatment A did not add fermented gamal leaf flour (0%), treatments B, C, D, E, and F added fermented gamal leaf flour 10%, 20%, 30%, 40%, and 50%. The addition of fermented gamal leaf flour in feed had an effect (P<0.05) on absolute growth in length and weight, specific growth rate, feed utilization efficiency and feed conversion ratio, but had no effect (P>0.05) on the viability of pomfret seeds. tasteless (P<0.05). The best growth results were obtained in treatment E (40%), with absolute length and weight growth values of 2.01 cm and 1.81 g, specific growth rate of 4.54%/day, feed conversion ratio of 1.48, and feed utilization efficiency 68.78%.

Monitoring Diseases in Water of Vannamei Shrimp (Litopenaeus Vannamei), Banyuwangi District

2024-04-05T10:14:06+07:00

Banyuwangi Regency has high potential for vannamei shrimp farming. Vannamei shrimp farming is susceptible to disease attack. Disease monitoring serves to determine the distribution of disease in vannamei shrimp ponds. The purpose of this study was to monitor disease in vannamei shrimp pond waters of Banyuwangi Regency. This research method uses descriptive method. Monitoring of water quality parameters insitu and exitu. Disease monitoring using Real-Time PCR Quant studio 5 to detect AHPND, WSSV, EHP, and IMNV. The analysis used was descriptive analysis. The results showed that the water quality in vannamei shrimp ponds in Banyuwangi Regency was an average temperature of 25.8℃, average salinity of 33.9 g.L-1 , average dissolved oxygen (DO) 7.15 mg.L-1 , average pH 8.15, average ammonia 0.257 mg.L-1 , average nitrite 0.04 mg.L-1 , average nitrate 4.9 mg.L-1 . As for the disease, there are three types, namely AHPND, EHP, and IMNV.