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Aquacultura Indonesiana

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Published by Universitas Diponegoro

ISSN : 02160749 EISSN : 24776939 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

Aquacultura Indonesiana (AI) is publishes original and peer-reviewed, English language papers concerned with culture of aquatic plants and animals. Subjects approriate for this journal would include, but not necessarily be limited to, nutrition, diseases, genetics and breeding, physiology, environmental quality, culture system enginering. husbandry practices, and economics and marketing. Fragmentary reports will not be considered for publication; coherent research should be published in a single paper. Preliminary studies, simple case reports, baseline data, parasite host or range extentions, and other such curiosities will not be considered for publication in the journal.

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Articles 6 Documents

Search results for , issue " Vol 19, No 2 (2018)" : 6 Documents clear

Optimum Feeding Rate for the Sub-adult Olive Flounder, Paralichthys olivaceus, Fed Practical Extruded Pellets at Optimum Water Temperature Shin, Seung-Jun; Shin, Seung-Jun; Bai, Sungchul C.; Bai, Sungchul C.; Lee, Kyeong-Jun; Lee, Kyeong-Jun; Kim, Jeong-Dae; Kim, Jeong-Dae; Kim, Sung-Sam
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

We investigated the effects of feeding rate on the growth, blood components, and histology of the growing olive flounder (Paralichthys olivaceus). We determined the optimum feeding rate (initial fish mean weight = 525.3 ± 7.12 g) at the optimum water temperature. Two replicate groups of fish were fed a commercial diet at rates of 0%, 0.2%, 0.4%, 0.6%, and 0.8% (i.e., to satiation) of body weight (BW) per day. The feeding trial was conducted using a flow-through system, with ten of 1.2-metric-ton aquaria receiving filtered seawater between 20.5 and 24.5°C, for 3 weeks. Weight gain (WG) and specific growth rate (SGR) were significantly greater in fish fed with satiation at 0.8% BW/day compared to fish fed at 0.2% BW/day, and with unfed fish. These parameters were negative, and significantly lower, in the starved fish compared to the fish fed the experimental diet, for all feeding rates. There were no significant differences in WG and SGR among fish fed at 0.2%, 0.4%, and 0.6% BW/day, and among those fed at 0.4%, 0.6% and 0.8% of BW/day. The histological changes in tissues were not significant in the hepatopancreas, kidney, or anterior intestine of fish fed at 0%, 0.4%, and 0.8% of BW/day. Broken-line regression analysis based on weight gain demonstrated that the optimum feeding rate for an olive flounder weighing 525 g was 0.70% BW/day at optimum water temperature.

A Tale of Two Urchins - Implications for In-Situ Breeding of the Endangered Banggai Cardinalfish (Pterapogon kauderni) Ndobe, Samliok; Jompa, Jamaluddin; Moore, Abigail
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

The endangered Banggai cardinalfish Pterapogon kauderni, endemic to the Banggai Archipelago in Central Sulawesi, Indonesia, is a national and global priority conservation species. To support stock recovery based on in-situ breeding, using the symbiosis between the Banggai cardinalfish and its microhabitat (especially urchins of Genus Diadema), specific research objectives were: (i) identify the Diadema species associated with Banggai cardinalfish in the wild; (ii) investigate Banggai cardinalfish preference between these Diadema species. Belt transect data (5 sites) found wild Banggai cardinalfish of all size classes associated with Diadema setosum and Diadema savignyi. Preference trials were conducted in a controlled environment (concrete tanks) with three replicates. Nine sub-adult Banggai cardinalfish (35-42 mm SL), 12 D. setosum and 12 D. savignyi were placed in each tank. Banggai cardinalfish association (D. savignyi, D. setosum, none) was recorded hourly (06:00-18:00) for three days and results analysed in RStudio-1.0.143. Banggai cardinalfish did not show significant preference for either D. savignyi or D. setosum. These results indicate that D. savignyi and D. setosum can be used impartially in further research on in-situ breeding to facilitate recovery of Banggai cardinalfish stocks. However stock recovery measures should consider genetic connectivity and the natural balance between the two urchin species.

Effect of Predigested Artificial Diet Using Papain Enzyme on the Degree of Protein Hydrolysis and Protease Enzyme Activity of Mud Crab (Scylla olivacea) Larvae at Zoea 2 and 3 Stages Haryati, Haryati; Fujaya, Yushinta; Saade, Edison
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

The ability of mud crab (Scylla olivacea) larvae to digest artificial diet depends on the availability of digestive enzyme. To enhance the larvaes capability to utilize artificial diet can be conducted by adding exogenous enzyme to the diet.The aim of this research was to determine the dose of papain enzyme and stadia of predigest artificial diet that produced the best degree of protein hydrolysis and protease enzyme activity. Completely randomized designwas used to evaluate the effect of papain enzyme dose on the degree of protein, with four treatment and three replications, namely the doses of 0.0%, 1.5%, 3.0%, and 4.5%. Factorial pattern with the completely randomized design was used to evaluate the effect of papain enzyme dose and the proper predigest artificial feeding stage on the activity of protease enzyme. The first factor was the papain enzyme dose (0.0%, 1.5%, 3.0%, and 4.5%), while second factor was the stadia of larvae when it is fed with predigested artificial diet (zoea 2 and zoea 3 stadia). The research showed that the difference of papain enzyme dose provides real effect on degree of protein hydrolysis either on JP 0 or JP 1 diet brands (P<0.05). Degree of protein hydrolysis of the diet predigested with 0.0% papain enzyme was the lowest and has real difference (P<0.05) with the 1.5%, 3.0% and 4.5% doses. Degree of protein hydrolysis on 3% dose of papain enzyme does not provide real difference with the 4.5%, namely 19.753% and 22.890% respectively in JP 0, 18.707 % and 20.430 % in JP 1, but has real difference (P<0.05) with 1.5% doses. The difference papain enzyme dose and stadia of predigest artificial diet as well as the interaction between both of them had significant effect (p<0.05) on the activity of protease enzyme. On the larvae of zoea 2 stadia, the activity of protease enzyme on the larvae fed with predigest artificial diet starting from zoea 2 stadia with 3.0% and 4.5% papain enzyme dose or those still fed with natural diet does not provide real difference, but is higher and provides real difference than 0% and 1.5% doses. On the larvae of zoea 3 stadia, the activity of protease enzyme to the larvae fed with artificial diet starting from zoea 2 with 0% and 1.5% papain enzyme doses, and those fed with artificial diet starting from zoea 3 stadia with 0% papain enzyme dose does not provide real difference (p>0.05) but is lower and provides real difference than other treatments. Protease enzyme activity on the larvae fed with predigest artificial diet using 4.5% papain enzyme starting at zoea 2 stadia , was not significantly different (P <0.05) compared to larvae fed artificial diet which was predigest with 0.0%, 1.5%, 3.0 and 4.5 papain enzyme started at Zoea 3. Based on the degree of protein hydrolysis, papain enzymes can be used to hydrolyze artificial diet in doses ranging from 3.0% to 4.5%. Based on the activity of protease enzymes, mud crab larvae (Scylla olivacea) predigested artificial diet using 4.5% papain enzyme can be provided to the larvae starting from zoea 2 stadia.

Dosage Optimization of Artificial Digestive Enzymes in Feed to Improve The Digestibility and Growth of Osphronemus gourami Bokau, Rietje J.M; Febriani, Dian; Indariyanti, Nur; Rakhmawati, Rakhmawati
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

One of the obstacles often encountered in the cultivation of gourami is a relatively slow rate of growth compared with other freshwater fishes. This slow growth is partly due to the incomplete and unbalanced nutritional content and the low ability of the fish to digest a certain type of feed materials. The ability to digest fish feed types depends on the quality and quantity of feed and enzymes present in the digestive tract. The enzymes released by the glands in the gut have the function to digest food elements. Among the enzymes involved in digestion are amylase, protease, lipase, cellulase, pectinase, and pullulanase. To improve digestion, the use of artificial enzymes in certain doses is combined with natural food such as papaya to optimize the dose of artificial enzymes. The use of papaya is already widely used as a food supplement, especially in the gourami grow-out culture. Aside from being natural food, papaya leaves can also serve as a natural source of digestive enzymes. The objective of this study is to determine the optimal dose of artificial enzymes added to feed which can improve the digestibility and growth of gourami. In this study, treatments of artificial feeding of gourami are used with the addition of artificial enzymes amounting to 1% (A), 2% (B), 3% (C), papaya leaves and pellets (D), and pellets alone (E). Results after two months rearing showed that the digestibility of feed supplemented with natural enzymes in papaya (papain) can be further improve optimized by the addition of artificial digestive enzymes in a dose of 3% of the weight of the feed. Fish of this treatment group showed faster growth compared with other treatments.

Research Update: Development of Plant-based Diets for Florida pompano Trachinotus carolinus Novriadi, Romi; Davis, D. Allen
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

The development of sustainable and economically sound practical diet in the coming years will depend on the reduction of fish meal and the increased inclusion of sustainable protein sources. Over the years, our laboratory has systematically reduced the inclusion levels of fish meal and other animal protein sources by using a range of alternative plant-protein sources. These diets may be further improved through the use of specialized proteins, supplements for limiting amino acids, enzyme and attractants. Good success has been seen with corn protein concentrates, advanced processing products of soybean meal, such as soy protein concentrates and advanced soy product (enzyme treated or fermented soy). Based on the results of our research, the proportion of animal meal can be reduced to 12 % in our current formulations without any detrimental effects on pompano performance and nutrient retention. In addition, the use of fermented soy or the combination of enzyme-treated soy with proper inclusion level of squid hydrolysates as an attractant has proven to improve the functional properties of SBM and lead to better liver and intestine condition of pompano. Considering the sizeable body of knowledge concerning nutrition for Florida pompano, all information taken from this species could be used as the starting point to develop better feed formulations for Silver pompano production in Indonesia.

The Effect of Water Temperature on Incubation Period, Hatching Rate, Normalities of The Larvae and Survival Rate of Snakehead Fish Channa striata Muslim, Muslim; Fitrani, Mirna; Afrianto, A.M.
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

The aims of this research were to determine the hatching performance of snakehead fish egg which incubated at different water temperature. This research had been conducted in the Fish Breeding Unit “Batanghari Sembilan”, Indralaya South Sumatera Indonesia. This research was an experimental research with 5 treatments of water temperature P1 (26 ± 0.5°C), P2 (28 ± 0.5°C), P3 (30 ± 0.5°C), P4 (32 ± 0.5°C), P5 (34 ± 0.5°C) and 3 repetitions. The results showed that incubation period needed at P1: 30.01 hours, P2: 28.02 hours, P3:23.13 hours, P4: 21.03 hours, P5: 20.12 hours. The best treatment for hatching rate, normality and survival rate were P2 treatment, 86.33%, 100% and 97.3%, respectively. Even though the fastest incubation period was the P5 treatment (20.12 hours). Water quality of the research was intolerance range, pH (4.17-5.32) and Dissolved Oxygen (6.23-6.71 mg.L-1). Based on the results acquired, incubation temperature at 28 ± 0.5°C produced the best hatching rate, normality, and survival rate.

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