scholarly journals MANIPULASI TEGANGAN LISTRIK PADA SALINITAS YANG BERBEDA TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP BENIH IKAN KERLING (Tor tambroides)

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Farah Diana
Keyword(s):  
Electrical Conductivity ◽  
Growth Rate ◽  
Survival Rate ◽  
Biomass Growth ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Commercial Fish ◽  
Growth And Survival ◽  
Length Growth ◽  
Absolute Length

Tor tambroides (local name is kerling) is one of commercial fish espicially  in Aceh, West Java, and North Sumatra. Salinity and electrical conductivity is known can affecting to fish physiologi. Purpose of this study is to knowing survival rate and growth rate of Tor tambroides juvenile, with different salinity and electrical conductivity as treatment. Survival rate, daily growth rate, absolute length growth and biomass growth rate was used as variable test. Result of study show that electrical conductivity with different salinty (0,3,5,7 ppt) (during 30 days) unaffecting to daily growth rate and biomass growth rate. However, manipulation of electrical conductivity with different salinity have been affecting to absolute length growth and survival rate. The range of value for survival rate is ±83,33 – 100%, daily growth rate is ±0,40 – 0,71%, absolute length growth is ±1,30 – 2,27% and the range of value for biomass growth rate is ±0,102 – 0,183 gram.

scholarly journals Growth of green catfish seed fed on sludge worm and artificial feed combination

2014 ◽  
Vol 12 (1) ◽  
pp. 18
Author(s):  
Netti Aryani ◽  
Niken Ayu Pamungkas ◽  
. Adelina
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Survival Rate ◽  
Artificial Diet ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival ◽  
Absolute Length ◽  
The Absolute ◽  
Mystus Nemurus

<p class="NoParagraphStyle" align="center"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">This research aimed to obtain information of growth and survival of green catfish (<em>Mystus nemurus</em>) juvenile fed with sludge worm (<em>Tubifex</em> sp.; T) and artificial diet (PB) and added with the combination of 50% soybean pulp waste and 50% freshwater trash fish. Feeding was performed in several variation of time during 40 days of fish rearing. Average body length of juvenile was 12 mm and weight 2.8±0.0 mg, maintained at a density of 30 individuals/aquarium. The treatment in this research was T10PB30 (8–18 days old juvenile were fed with sludge worm and 18–48 days old fish were fed with artificial diet), T20PB20 (8–28 days old juvenile were fed with sludge worm and 28–48 days old were fed with artificial diet), T30PB10 (8–38 days old juvenile were fed with sludge worm and 38–48 days old were given artificial diet), PB40 (8–48 days old juvenile were fed artificial diet), T40 (8–48 days old juvenile were fed with sludge worm). The results indicated that the treatment of 40 days feeding with sludge worm provided the best growth and survival as daily growth rate of 16.4±28.0 g/day, the growth of the absolute length was 43.60±0.01 mm, the absolute body weight 2,047.2±35.0 mg and the survival rate was 96.44%. The best artificial feeding treatment was feeding with sludge worm for 30 days and with 10 days of artificial diet, results in daily growth rate of 4.53±0,25 mm/day, the growth of the absolute length 40.00±0.04 mm, the absolute body weight 1,447.2±15.0 mg, and the survival rate 94.44±2.60%.</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Keywords: artificial feed, sludge worm, growth, green catfish</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle" align="center"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk mendapatkan informasi pertumbuhan dan sintasan benih ikan baung (<em>Mystus nemurus</em>) dengan pemberian cacing sutra (<em>Tubifex</em> sp.; T) dan pakan buatan (PB) kombinasi 50% limbah ampas tahu dan 50% ikan rucah air tawar. Pakan diberikan dengan variasi lama waktu berbeda selama pemeliharaan 40 hari. Rerata panjang awal benih adalah 12 mm dan bobot tubuh 2,8±0,0 mg, dipelihara dengan kepadatan 30 ekor/akuarium. Perlakuan dalam penelitian ini adalah T10PB30 (benih umur 8–18 hari diberi pakan cacing sutra dan umur 18–48 hari pakan buatan), T20PB20 (benih umur 8–28 hari diberi cacing sutra dan umur 28–48 pakan buatan), T30PB10 (benih umur 8–38 diberi pakan cacing sutra dan umur 38–48 diberi pakan buatan), PB40 (benih umur 8–48 hari diberi pakan buatan), T40 (benih umur 8–48 hari diberi pakan cacing sutra). Hasil penelitian ini menunjukkan bahwa perbedaan lama waktu pemberian cacing sutra dan pakan buatan yang terbaik adalah pemberian pakan cacing sutra selama 40 hari dengan laju pertumbuhan harian 16,4±28,0 g/hari, pertumbuhan panjang mutlak 43,60±0,01 mm, bobot mutlak 2.047,2±35,0 mg, dan sintasan 96,44%. Selanjutnya variasi lama waktu pemberian pakan buatan yang terbaik adalah pemberian cacing sutra selama 30 hari dan pakan buatan sepuluh hari dengan laju pertumbuhan harian sebesar 4,53±0,25 mm/hari, pertumbuhan panjang mutlak 40,00±0,04 mm, bobot mutlak 1.447,2±15,0 mg, dan sintasan 94,44±2,60%.</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Kata kunci: pakan buatan, cacing sutra, pertumbuhan, ikan baung</p><p> </p>

scholarly journals Effect of Hardness in 3 ppt of Water Salinity on growth and survival rates of Barb Fish (Barbus conhonius Hamilton-Buchanan)

2007 ◽  
Vol 4 (1) ◽  
pp. 17 ◽  
Author(s):  
Kukuh Nirmala ◽  
R. Wulandari ◽  
D. Djokosetiyanto
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Survival Rates ◽  
Water Hardness ◽  
Water Salinity ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival

<p>This study was conducted to determine the effect of hardness on growth and survival rate of barb fish (<em>Barbus conchonius</em> Hamilton-Buchanan) reared in the 3 ppt of water salinity.  Fish were reared in three different hardnesses, i.e., 54, 72,<sub> </sub>and 90 mg/L CaCO<sub>3 </sub>for 30 days.  The results of study showed that fish reared in water hardness of 72 mg/L CaCO<sub>3</sub> had higher daily growth rate (1.15%) compared with other treatments.  Daily growth rate of fish reared in water hardness of 54 and 90 mg/L CaCO<sub>3</sub> were 0.76 and 0.37%, respectively.  There was no effect of hardness on survival rate of barb fish.</p> <p>Keywords: barb fish, <em>Barbus conchonius</em>,  hardness, salinity</p> <p> </p> <p>ABSTRAK</p> <p>Penelitian ini bertujuan untuk mengetahui pengaruh kesadahan yang berbeda terhadap laju pertumbuhan dan tingkat kelangsungan hidup ikan barbir (<em>Barbus conchonius</em> Hamilton-Buchanan) yang dipelihara <a name="OLE_LINK2"></a><a name="OLE_LINK1">pada air bersalinitas 3 ppt.  </a>Ikan dipelihara dalam 3 tingkat kesadahan yang berbeda, yaitu 54 mg/L CaCO<sub>3</sub>, 72 mg/L CaCO<sub>3</sub>,<sub> </sub>dan 90 mg/L CaCO<sub>3 </sub>selama 30 hari.  Hasil penelitian menunjukkan bahwa laju perumbuhan harian tertinggi diperoleh pada ikan yang dipelihara pada kesadahan 72 mg/L CaCO<sub>3 </sub>(1,15%) dibandingkan dengan perlakuan lainnya. Laju pertumbuhan harian ikan yang dipelihara pada kesadahan 54 dan  90 mg/L CaCO<sub>3</sub> masing-masing mencapai 0,76% dan 0,37%.  Kelangsungan hidup ikan barb tidak dipengaruhi oleh kesadahan.</p> <p>Kata kunci: ikan barbir, <em>Barbus conchonius</em>, kesadahan, salinitas</p>

scholarly journals Effect of Stocking Density on Growth and Survival Rate of Giant Gouramy (Osphrenemus gouramy Lac.) Seed

2009 ◽  
Vol 8 (2) ◽  
pp. 199 ◽  
Author(s):  
S. Sarah ◽  
. Widanarni ◽  
Agus Oman Sudrajat
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Feed Efficiency ◽  
Stocking Density ◽  
Individual Growth ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Fish Yield ◽  
Growth And Survival ◽  
Individual Growth Rate

<p>This experiment was conducted to study the stocking density effect on growth and survival rate of giant gouramy seed in the aquarium. Fish were stocked at the density of 2.5; 5.0; 7.5 and 10 individual/l with average initial weight and length were 0.013 g and 5.56 mm, respectively. Fish were fed with silkworm (<em>Tubifex</em> sp.) <em>ad libitum</em> in the morning and evening for 22 days of experiment. Aquarium was siphoned and water was changed everyday for maintaining good water quality. Result showed that survival rate remain high in all treatment (93.5 - 95.5%). Increasing stocking density from 2.5 to 10 individual/I did not affect survival rate. On the other hand growth rate and feed efficiency decreased, while fish yield increased. Stocking density of 2,5 individual/l gave  the highest daily growth rate, individual growth rate, growth in length and feed efficiency of 12.94%, 0.0081 g/day, 16.84 mm and 12.51%; respectively. The highest value for fish yield (0,0360 g/l/day) was obtained from stocking density of 10 individual/l</p> <p>Key words: stocking density, seed, survival rate, growth rate, giant gouramy <em>Osphrenemus goramy</em></p> <p> </p> <p>ABSTRAK</p> <p>Keterbatasan pengadaan benih ikan gurame (<em>Osphronemus gourame </em>Lac.) disebabkan oleh tidak seimbangnya jumlah benih yang tersedia dengan kebutuhan usaha pembesaran. Teknik pembenihan yang digunakan sampai saat ini relatif sederhana dengan cara tradisional. Pemeliharaan gurame secara terkontrol di akuarium dapat menjawab tantangan dalam teknologi pembenihan gurame sekaligus sebagai sarana pola budidaya secara bertahap yang sedang berkembang saat ini. Produksi yang tinggi akan dicapai dengan pemeliharaan pada kepadatan yang tinggi. Pada keadaan lingkungan yang baik dan pakan yang mencukupi, peningkatan kepadatan akan disertai dengan peningkatan hasil. Jumlah ikan yang ditebar pada penelitian ini disesuaikan berdasarkan perlakuan yaitu 2,5; 5,0; 7,5 dan 10 ekor/l. Pengamatan terhadap ikan dilakukan sampai hari ke-22. Hasil pengamatan menunjukkan bahwa peningkatan kepadatan 2,5 - 10 ekor/l pada pemeliharaan benih gurame di akuarium mempengaruhi pertumbuhan, hasil dan efisiensi pakan, namun tidak berpengaruh terhadap kelangsungan hidup. Dengan meningkatnya padat penebaran, laju pertumbuhan dan efisiensi pakan semakin menurun, sedangkan hasil (<em>yield</em>) semakin meningkat. Padat penebaran 2,5 ekor/l menghasilkan laju pertumbuhan harian, laju pertumbuhan individu, pertumbuhan panjang mutlak dan efisiensi pakan tertinggi, masing-masing mencapai 12,94 %, 0,0081 g/hari, 16,84 mm dan 12,51 %. Sedangkan nilai tertinggi untuk hasil (<em>yield</em>) sebesar 0,0360 g/l/hari diperoleh pada padat penebaran 10,0 ekor/l.</p> <p>Kata kunci : padat tebar, pembenihan, gurame dan <em>Osphronemus gouramy</em></p>

scholarly journals SUHU OPTIMUM UNTUK LAJU PERTUMBUHAN DAN SINTASAN BENIH LOBSTER AIR TAWAR Cherax quadricarinatus

2016 ◽  
Vol 1 (1) ◽  
pp. 67
Author(s):  
Irin Iriana Kusmini ◽  
Wartono Hadie ◽  
Elinda P Sianipar
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Water Temperature ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Cherax Quadricarinatus ◽  
Growth And Survival ◽  
Randomized Design ◽  
Red Claw Crayfish ◽  
C 30

Tujuan penelitian untuk mengetahui pengaruh suhu air yang memberikan hasil terbaik bagi laju pertumbuhan dan sintasan benih lobster air tawar, red claw. Rancangan percobaan yang digunakan adalah rancangan acak lengkap (RAL) yang terdiri atas empat perlakuan, yaitu pada suhu air 26°C, 28°C, 30°C, dan 32°C; masing-masing perlakuan tiga ulangan. Parameter yang diamati adalah laju pertumbuhan harian dan sintasan benih lobster red claw. Hasil penelitian menunjukkan bahwa laju pertumbuhan harian dan sintasan benih lobster tertinggi terdapat pada suhu 28°C, yaitu sebesar 1,15% dan 85,93%. Laju pertumbuhan harian dan sintasan benih lobster mencapai optimum pada suhu 28°C, yaitu sebesar 1,05% dan 85,93%.The aim this research was to find out the effect of water temperature to the growth and survival rate of red claw crayfish (Cherax quadricarinatus) juvenile. The experiment design used completely randomized design (CRD) with four treatments of water temperature i.e. 26°C, 28°C, 30°C, 32°C and each of the treatments was replicated three times. Parameters observed are daily growth rate and survival rate of red claw crayfish juvenile. The result showed that temperatures were effected to growth rate and survival rate of red claw crayfish juvenile which expressed through quadratic response curve. The highest daily growth rate and survival rate of red claw crayfish fry was found on temperature 28°C C i.e. 1.15% and 85.93%. The optimum growth rate and survival rate was found on temperature 28°C i.e. 1.05% and 85.93%.

scholarly journals The Effect of Potassium Diformate Addition to Feed on Growth and Survival Rates of Common Carp (Cyprinus carpio L.)

2020 ◽  
pp. 1-8
Author(s):  
Ayi Yustiati ◽  
Mahmud Sa’id ◽  
. Junianto ◽  
Ibnu Bangkit Bioshina Suryadi
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Common Carp ◽  
Survival Rates ◽  
Stocking Density ◽  
Good Effect ◽  
Optimal Dosage ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival

This research aimed to determine the optimal dosage of potassium diformate addition to commercial feed in order to increase the growth and survival rate of common carp seeds. The method used in this research was experimental in a completely randomized design (CRD) consisting of five treatments and four replications. The treatments used were A (control), B with addition of potassium diformate (0.2%), C (0.3%), D (0.4%), and E (0.5%). For test fish, there were 200 of Common carp seeds with a size of 2-3 cm. The media used was 20 aquariums with a size of 40x30x40 cm3 and a stocking density of 10 individuals/aquarium. The rearing period was 35 days and the amount of feed given was 3% of the fish body weight. The parameters observed included water quality (temperature, pH, and dissolved oxygen) which were observed every 7 days for 35 days. Other parameters  monitored were daily growth rate, survival rate, feed efficiency, and the acidity level of the intestine. The results showed that 0.3% addition of potassium diformate gave the best results with a daily growth rate value of 3.21%, highest survival of 98%, efficiency of feed utilization of 64.83%, and a decrease in intestinal pH which helped the process of protein absorption in the fish body. In conclution, the addition of potassium diformate has good effect on growth and survival rates of common carp.

scholarly journals The application of integrated multi-trophic aquaculture (IMTA) using floating net cages on Tilapia fish with native fish (Peres, Lemeduk, and Depik)

DEPIK ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 219-224
Author(s):  
Nurfadillah Nurfadillah ◽  
Iwan Hasri ◽  
Muhammad Reza Purnama ◽  
Adrian Damora ◽  
Siska Mellisa
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Biomass Production ◽  
Environmental Problems ◽  
Daily Growth ◽  
Absolute Weight ◽  
Length Growth ◽  
Weight Growth ◽  
Absolute Length ◽  
Net Cages

Environmental problems due to aquaculture occur along with the increase in aquaculture production. IMTA is one system used as a solution in dealing with environmental problems. The objective of this study was to analyze the growth performance, survival rate, and production of the main commodity (tilapia) and the supporting commodities (Peres, Lemeduk, and Depik) which are applied through the application of integrated multi-trophic aquaculture (IMTA) using floating net cages. This research was conducted at the Lukup Badak Fish Seed Center, Central Aceh from July to August 2020. The experimental design used was a completely randomized design (CRD) with 4 treatments and 3 replications, namely: A (tilapia), B (tilapia and peres), C (tilapia and lemeduk), and D (tilapia and depik). ANOVA test results showed that the IMTA system had a significant effect on absolute length growth, absolute weight growth, specific growth rate (SGR), survival rate, and biomass production of tilapia (P0.05). The results showed that maintenance for 42 days produced the highest value in treatment B with the increase in absolute length growth (4.26cm±0.24); absolute weight growth (5.47g±0.45), specific daily growth rate (2.28%/day±0.13) and the highest tilapia biomass production (480g/0.5m2±19.25). The highest survival rate was found in treatment C (82.42%±2.28). It was concluded that the treatment using the IMTA system was better than without the IMTA system.Keywords:IMTAWater qualityGrowth performanceTrophic interactionBiomass production

scholarly journals Effects of stocking density on growth and survival of tilapia cultured in biofloc technology system in brackish water

2020 ◽  
Vol 20 (2) ◽  
pp. 221-230
Author(s):  
Nguyen Xuan Thanh ◽  
Le Duc Cuong ◽  
Le Minh Hiep ◽  
Dao Thi Anh Tuyet
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Specific Growth ◽  
Stocking Density ◽  
Control Treatment ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival ◽  
Technology System ◽  
Biofloc Technology

This study examined the effect of stocking density on growth and survival of tilapia cultured in biofloc technology system. Three different stocking densities cultured in biofloc technology were 6 fish/m3, 8 fish/m3 and 10 fish/m3 for 86 days in triplicate for each treatment. The stocking density of the control lot was 3 fish/m3 cultured without biofloc technology. Initial stocking weight ranged from 2–3 g/fish. The water quality parameters were monitored and regulated in the suitable ranges for biofloc technology and for the growth and development of tilapia. The results showed that specific growth rate of fish cultured at a density of 6 fish/m3 was higher than that in the treatments of 8 fish/m3 and 10 fish/m3 with the average values of 5.72%; 5.62% and 5.43%, respectively, and the specific growth rate of fish in the control treatment was 5.71%. Daily growth rate of fish cultured at a density of 6 fish/m3 was higher than that cultured at densities of 8 fish/m3 and 10 fish/m3 with average values of 3.19 g/day, 2.98 g/day, and 2.55 g/day, respectively; and the daily growth rate of the control treatment was 3.27 g/day. Survival rate of tilapia cultured at densities of 6 fish/m3 and 8 fish/m3 was 100%, whereas survival rate of tilapia cultured at a density of 10 fish/m3 was 95.75%, and it was 88.9% for the control lot. The research results provide a scientific basis to propose tilapia culture technique in biofloc technology in brackish water, with the density of 6–8 fish/m3.

scholarly journals Probiotic aplication for growth and survival rate of vaname shrimp Litopenaeus vannamei with different density

2018 ◽  
Vol 2 (2) ◽  
pp. 41 ◽  
Author(s):  
Abdul Rakhfid ◽  
Wa Ode Halida ◽  
Rochmady Rochmady ◽  
Fendi Fendi
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Litopenaeus Vannamei ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival ◽  
Randomized Design ◽  
Individual Survival ◽  
Absolute Growth ◽  
Completely Randomized Design

The study aimed to determine the growth and survival of Litopenaeus vannamei shrimp with the application of probiotics to different stocking densities.  The study was conducted from May to June 2018 at the Balai Benih Ikan Pantai (BBIP) Ghonebalano, Duruka District, Muna Regency, using a Completely Randomized Design (CRD) with three levels of solid stocking treatment namely treatment A is 18 individu per container, treatment B is 24  individu per container and treatment C is 30  individu per container with three replications.  Data analysis using Variance Analysis (ANOVA) at the confidence level of 95% (α 0.05).  The results showed that the highest daily growth was obtained at 24 individual densities of 5.88% per day, compared to 18 individual densities of 5.86% per day and 30 individual densities of 5.74% per day.  The highest absolute growth is obtained at 24 individual density of 2.43 g per individu, then 18 individual density of 2.15 g per individual, and the lowest at 30 individual density of 2.02 g per individual.  Survival at a density of 18 individual and a density of 24 individual at 88.89%, while a 30-ind density of 86.67%.  Analysis of variance (α 0.05) showed that the application of probiotics to different stocking densities had no significant effect on the daily growth rate of vannamei shrimp (p<0.939), absolute growth of vannamei shrimp (p<0.080), and survival of vannamei shrimp (p<0.744).

scholarly journals Effect of Addition of Banana Peel Extract on Commercial Feed as an Effort to Reduce Patin Cannibalism (Pangasius hypophthalmus) Larval Stage

2019 ◽  
pp. 1-9
Author(s):  
Kiki Haetami ◽  
Irfan Zidni ◽  
Rita Rostika ◽  
Wisnu Ginanjar
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Fish Larvae ◽  
Banana Peel ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Length Growth ◽  
Commercial Feed ◽  
Absolute Length ◽  
Peel Extract

This research aims to determine the best concentration of banana peel extract used in commercial feed on the survival of patin fish larvae. The research was conducted on April 2, 2019 until June 1, 2019 which took place at the Aquaculture Laboratory of the Faculty of Fisheries and Marine Sciences, Padjadjaran University. The making of banana peel extract was carried out at the Central Labforatory, Padjadjaran University. The research method was carried out experimentally with Completely Randomized Design (CRD). This research uses five treatments that are repeated three times. The treatment in this research consisted of the addition of banana peel extract on commercial feed at a dose of 0%, 0.50%, 0.75%, 1.00 and 1.25% per kilogram of feed. The parameters observed in this research were survival, absolute length growth, daily growth rate, and water quality. The analysis used is the f test and descriptive analysis. Parameters tested using the f test include survival, absolute length growth, and daily growth rate. While water quality was tested descriptively. Survival rates, absolute length growth, and growth rates ranged from 75.33% to 86.96%, 1.29 - 1.32 cm and 2.95% -3.00% respectively. The observation of water quality include temperature, pH and DO respectively waters ranged from 28.00 to 30.20 °C, 7.22 to 8.18 and 5.40 to 6.70 mg /L. Based on research results concluded that the concentration of banana peel extract 0% - 1% produced a survival rate of 81.70% - 86.96% and was better than the addition of banana peel extract with a concentration of 1.25% which resulted in a survival rate of 75.53%. The suggestion from this study is to improve the survival of patin fish larvae can be added banana peel extract with a concentration of 0.75% or equivalent to 7.5 g / Kg of feed.

scholarly journals Effect of Rearing Density on Growth and Survival Rate of Balashark (Balantiocheilus melanopterus Blkr.) Fry at Recirculation Culture System

2008 ◽  
Vol 7 (2) ◽  
pp. 189
Author(s):  
I. Effendi ◽  
T.D. Ratih ◽  
T. Kadarini
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Survival Rate ◽  
Population Data ◽  
Fish Length ◽  
Market Demand ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival ◽  
Rearing Density

<p>Population of balashark (<em>Balantiocheilus melanopterus</em>, Blkr.) in nature has been decreased.  Therefore, domestication is needed to recover the stock and meet the market demand.  This study was conducted to determine rearing density producing the best survival and growth rate of fish.  Fry of balashark in length of 1.5 cm and body weight of 0.2 g were reared at density of 1, 2, 3 and 4 fish/l in recirculation aquarium 50×50×40 cm<sup>3</sup> system.  During experiment, fish were fed on <em>Tubifex</em> two times daily at 15% body weight or 0.168 g/fish.  Sampling of fish length and body weight was done every two weeks by 10% of population.   Data were analyzed using ANOVA and polynomial orthogonal test.  The results indicated that daily growth rate by weight (Y1) of fish decreased by increasing the rearing density (X).  Response of daily growth rate related to rearing density was negatively linear as Y1= 7.3563 - 0.253X.  Daily growth rate by length was also decreased by increasing the rearing density.  Their response was also negatively linear as Y2 = 0.7411 - 0.0358X. Food efficiency of was decreased by increasing the rearing density at 0.69, 0.61, 0.53 and 0.36%, respectively.  Survival rate of fish in each treatment was relatively similar, ranged from 95.0 to 98.5%.   Thus, best growth and survival rate were obtained by rearing fish at density of 1 fish/l.</p> <p>Keywords: balashark, <em>Balantiocheilus melanopterus</em>, density, growth, survival rate</p> <p> </p> <p>ABSTRAK</p> <p>Populasi benih ikan balashark (<em>Balantiocheilus melanopterus</em>, Blkr.) dialam menurun. Oleh karena itu perlu dilakukan upaya budidaya (domestikasi) untuk memulihkan stok dan memenuhi permintaan pasar. Penelitian ini bertujuan untuk mengetahui padat penebaran yang memberikan kelangsungan hidup dan pertumbuhan terbaik dalam sistem budidaya. Benih ikan balashark yang berukuran rata-rata 1,5 cm dan bobot 0,2 g ditebar dengan kepadatan 1, 2, 3 dan 4 ekor/liter dalam akuarium berukuran 50×50×40 cm<sup>3</sup> yang dirancang dalam suatu sistem resirkulasi. Selama pemeliharaan, benih ikan ini diberi cacing sutera dua kali sehari sebanyak 15% bobot tubuh atau 0,168 g per ekor. Pengukuran panjang dan bobot ikan dilakukan dua minggu sekali sebanyak 10% populasi. Data diuji dengan sidik ragam dan uji respon dengan polinomial orthogonal. Laju pertumbuhan berat harian (Y1) benih ikan balashark semakin menurun dengan bertambahnya padat penebaran (x), respon yang diberikan laju pertumbuhan berat harian terhadap padat tebar adalah linier negatif mengikuti persamaan Y1 = 7,3563 - 0,253x. Laju pertumbuhan panjang harian (Y2) benih ikan balashark juga semakin menurun dengan bertambahnya padat penebaran (x). Respon yang diberikan juga berupa linier negatif mengikuti persamaan Y2 = 0,7411 - 0,0358 x. Efisiensi pemberian pakan benih ikan balashark untuk padat penebaran 1-4 ekor/liter masing-masing pemberian adalah 0,69, 0,61, 0,53 dan 0,36%.  Tingkat kelangsungan hidup ikan relatif sama, berkisar antara 95,0 sampai 98,5%. Dengan demikian pertumbuhan dan kelangsungan hidup terbaik diperoleh pada padat tebar 1 ekor/l. <em></em></p> <p>Kata kunci: balashark, <em>Balantiocheilus melanopterus</em>, kepadatan, pertumbuhan, kelangsungan hidup</p>

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