ẢNH HƯỞNG CỦA MẬT ĐỘ VÀ TẦN SUẤT CHO ĂN ĐẾN HIỆU QUẢ ƯƠNG GIỐNG VÀ STRESS Ở CÁ LEO – Wallago attu (Bloch & Schneider, 1801)

2021 ◽  
Vol 5 (3) ◽  
pp. 2633-2644
Author(s):  
Võ Đức Nghĩa ◽  
Nguyễn Đức Thành ◽  
Lê Thị Thu An ◽  
Phan Thanh Hiệp ◽  
Nguyễn Văn Huy
Keyword(s):  
Survival Rate ◽  
Negative Relationship ◽  
Stocking Density ◽  
Cortisol Concentration ◽  
Larval Rearing ◽  
Feeding Frequency ◽  
Growth And Survival ◽  
Larval Stages ◽  
Wallago Attu ◽  
Stress Levels

Nhằm xác định ảnh hưởng của mật độ và tần suất cho ăn đến sinh trưởng và tỉ lệ sống cá Leo Wallago attu giai đoạn ương giống, thí nghiệm được tiến hành với 5 mức mật độ (1, 2, 4, 8 và 16 con/L) và các tần suất cho ăn (1, 2, 3, 4 và 5 lần/ngày). Kết quả nghiên cứu cho thấy mật độ ương và tần suất cho ăn đã ảnh hưởng có ý nghĩa thống kê đến tỉ lệ sống của cá thí nghiệm. Tỉ lệ sống của cá giảm ở mật độ ương nuôi cao (p<0,05). Tỉ lệ ăn thịt đồng loại giảm ở các nghiệm thức mật độ nuôi thấp. Tần suất cho cá ăn có tương quan thuận với tỉ lệ sống, tỉ lệ sống của cá tăng trên 50% khi tăng số lần cho ăn lên 3 – 5 ngày/lần. Tỉ lệ ăn thịt đồng loại của cá có mối tương quan nghịch với tần suất cho ăn. Nồng độ cortisol trong máu cá được xem như chỉ thị đối với mức độ stress của cá.  Kết quả của nghiên cứu này cho thấy rằng nồng độ cortisol của cá Leo ở mật độ nuôi cao và tần suất cho ăn 1 và 2 lần/ngày cao hơn so với những nghiệm thức còn lại. Do vậy, mức độ stress của cá Leo có thể được xem như một trong những yếu tố chính dẫn đến hiện tượng ăn thịt lẫn nhau và làm giảm tỉ lệ sống đối với loài cá này ở giai đoạn giống. Những kết quả của nghiên cứu này có thể cung cấp thông tin hữu ích nhằm nâng cao hiệu quả của việc ương nuôi cá Leo giống thông qua quản lý mật độ nuôi và tần suất cho ăn. ABSTRACT In order to elucidate the effects of stocking density and feeding frequency on the growth and survival of Wallago attu, post-hatch larvae were stocked at different densities (1, 2, 4, 8 and 16 individuals per liter) and fed with (1, 2, 3, 4 and 5-times per day). The results indicate that stocking density and feeding frequency had significant influences on the survival rate of the larvae (p<0.05). In particular, the survival rate of larvae decreased at trials with high stocking density (p<0.05) due to the cannibalism. The percentage of cannibalism decreased in treatments with low stocking densities. Regarding effects of feeding frequency, the proportionality between the survival rate of larvae and high feeding frequency was observed in this study (p<0.05). The survival rate of larvae reached 50% when fish were fed 3 -5 times per day. The cannibalism had negative relationship with frequency of daily feeding. The cortisol concentration in fish blood is considered as an indicator of stress levels of fish. The results of this study indicated that cortisol concentration of W. attu reared at high stocking density and fed 1-2 times/day was higher than that in other treatments. Therefore, stress levels of W. attu could be one of the main factors causing cannibalism and reduction of survival rate at larval stages. This study provided useful information to enhance the effectiveness of larval rearing of W. attu via controlling stocking density and feeding frequency.  

scholarly journals PENGARUH PERBEDAAN PADAT TEBAR LARVA TERHADAP PERTUMBUHAN DAN SINTASAN PADA IKAN UCENG (Nemacheilus fasciatus)

2019 ◽  
Vol 18 (2) ◽  
pp. 209-214
Author(s):  
Jojo Subagja ◽  
Vitas Atmadi Prakoso ◽  
Otong Zenal Arifin ◽  
Anang Hari Kristanto
Keyword(s):  
Weight Gain ◽  
Survival Rate ◽  
Specific Growth ◽  
Negative Impact ◽  
Fish Larvae ◽  
Survival Rates ◽  
Stocking Density ◽  
Larval Rearing ◽  
Growth And Survival ◽  
Length Gain

Proper stocking density on larval rearing of barred loach (Nemacheilus fasciatus Valenciennes, 1846) is very important in terms of obtaining the best growth and survival rate. This study was aimed to observe the growth and survival rate of barred loach subjected to different larval stocking density. Fish larvae were obtained by artificial spawning from in aquarium. Larvae were stocked on aquariums (50 × 40 × 30 cm) with three stocking density treatments (5, 10, and 15 individuals/L) and three replications. The experimental fish larvae were fed by Artemia and commercial feed (crude protein content: 30%) and feeding frequency twice per day (ad libitum). The length and weight were reassured every 10 days during 70 days of rearing period. Temperature, pH, and dissolved oxygen were measured at each treatment. Data obtained from measurements were analysed to assess the length gain, weight gain, specific growth rate (SGR), biomass gain, and survival rate. The results showed length gain of 3.35 ± 0.01, 2.94 ± 0.10, and 2.82 ± 0.15 cm and weight gain of 0.573 ± 0.023, 0.436 ± 0.018, and 0.417 ± 0.043 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Specific growth rates and biomass growth were of 6.22 ± 0.41, 5.93 ± 0.21, and 5.68 ± 0.41 %/day and 94.04 ± 5.39, 146.80 ± 3.81, and 167.24 ± 17.48 g in larval stocking density of 5, 10 and 15 individuals/L, respectively. Meanwhile, the survival rates obtained in this study were 89.13 ± 7.25, 93.13 ± 5.13, and 76.50 ± 3.54 % in larval stocking density of 5, 10 and 15 individuals/L, respectively. Increased stocking density has a negative impact on the growth and survival rate of barred loach.

NATURAL FEEDING OF SLUDGE WORMS (Tubifex sp.) WITH DIFFERENT FEEDING RATE ON GROWTH AND SURVIVAL RATE OF CTENOPOMA (Ctenopoma acutirostre) FISH SEEDS

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Muhammad Atilah Setiawan ◽  
Muarif Muarif ◽  
Fia Sri Mumpuni
Keyword(s):  
Survival Rate ◽  
Feeding Rate ◽  
Specific Growth ◽  
Feeding Frequency ◽  
Initial Weight ◽  
Growth And Survival ◽  
Randomized Design ◽  
Absolute Length ◽  
Test Fish ◽  
Completely Randomized Design

The aim of this study was to determine the growth and survival rate of Ctenopoma fish seeds. This study used a completely randomized design with 3 treatments and 3 replications. The treatment in this study was a different feeding rate using natural feed of Tubifex sp  namely A (8%), B (10%), and C (12%) ). The test fish used was Ctenopoma fish seeds with an initial length of 2.40 ± 0.10 cm and an initial weight of 0.32 ± 0.05 g. Fish seeds are cultivated  for 28 days with feeding frequency twice a day. The results of research showed that the use of different feeding rate had an significantly different (P<0.05) on the specific growth  rate and absolute length growth with the best results in the treatment C. The survival rate was not significantly different between treatments (P>0.05). Key Words: Ctenopoma, feeding rate, growth, survival rate 

scholarly journals EFFECTS OF DIFFERENT pH SETTINGS ON GROWTH AND SURVIVAL OF COMMON CARP RAJADANU STRAIN

2018 ◽  
Vol 13 (2) ◽  
pp. 57 ◽  
Author(s):  
Vitas Atmadi Prakoso ◽  
Deni Radona
Keyword(s):  
Survival Rate ◽  
Common Carp ◽  
Culture Media ◽  
Stocking Density ◽  
Quality Parameters ◽  
Fish Length ◽  
Total Biomass ◽  
Growth And Survival ◽  
Fish Group ◽  
Ph Range

pH is one of the important water quality parameters in aquaculture. This study aimed to observe the growth performance and survival rate of common carp (Cyprinus carpio) Rajadanu strain reared in culture media with different pH levels. Fish (length: 3.60 ± 0.18 cm; weight: 1.68 ± 0.18 g) were stocked in nine aquariums (40 cm x 40 cm x 30 cm) for 10 days with a stocking density of 25 fish per aquarium. The treatments used were (A) pH 4-5, (B) pH 5-6, and (C) pH 6-7, with three replications. A commercial feed containing 28% protein was given daily and as much as 3% of the total biomass. The observed data were analyzed using variance analysis (ANOVA), followed by Duncan test. The results showed that the pH treatments did not affect the growth (length and weight) and survival rate of common carp Rajadanu strain (P>0.05). The best growth was achieved by the fish group reared in water with a pH range of 6-7 (length = 0.38 cm; weight = 0.17 g). The highest survival was attained by the fish group reared in water with a pH range of 5-6 (90.66%).

scholarly journals ANALISIS PERTUMBUHAN DAN TINGKAT KELANGSUNGAN HIDUP IKAN NILA (Oreochromis niloticus) DENGAN PEMBERIAN PAKAN PELET DARI SUMBER YANG BERBEDA

2021 ◽  
Vol 46 (1) ◽  
pp. 89
Author(s):  
Elrifadah - Elrifadah
Keyword(s):  
Survival Rate ◽  
Nile Tilapia ◽  
Stocking Density ◽  
Average Weight ◽  
Average Yield ◽  
Feed Conversion ◽  
Growth And Survival ◽  
Randomized Design ◽  
Level 3 ◽  
Pellet Feed

This study was aim to determine the different pellet feed source on the growth and survival rate of Nile tilapia. The purpose of this research was to provide information of the best feed for the growth and survival rate of Nile tilapia.Completely Randomized Design, with 3 treatments ( treatment A: community-made pellet, treatment B: commercial pellet PF500; treatment C: commercial pellet 885) and 3 replicate was used for the research. Nile tilapia with 3-4 cm length placed in nine aquariums with stocking density 6 fishes/L. Feeding treatment given twice a day at level 3 %/ body weight.  The parameters observed include growth rates, survival, and feed conversion. Supporting data was observed for water quality. Observation was carried out for 30 days.The results showed that the average weight, in treatment A was 101,66 g, treatment B was 118.33 g, and treatment C was 128.33 g. The average yield of relative growth in treatment A was 111.44%, treatment B was 134.23%, and treatment C was 135.76%. Treatment C shows the highest value, then treatment B and treatment A. The average yield of feed conversion, treatment A was 1.11; treatment B 3.21; and treatment C was 3.37. Survival rate of all treatments was 100%.

Effect of Feeding Frequency on Growth and Survival Rate of Clarias gariepinus Fingerlings Reared in Plastic Bowls

2014 ◽  
Vol 9 (5) ◽  
pp. 425-429 ◽  
Author(s):  
F.P. Asuwaju ◽  
V.O. Onyeche ◽  
K.E. Ogbuebunu ◽  
H.F. Moradun ◽  
E.A. Robert
Keyword(s):  
Survival Rate ◽  
Clarias Gariepinus ◽  
Feeding Frequency ◽  
Growth And Survival ◽  
Effect Of Feeding

scholarly journals Efficacy and suitability of whole wheat flour on the growth and survival of Rohu (Labeo rohita)

2019 ◽  
Vol 6 (2) ◽  
pp. 345-352
Author(s):  
Shovon Sarker ◽  
Md Fazle Rohani ◽  
Md Shafiqur Rahman ◽  
Md Sazzad Hossain
Keyword(s):  
Weight Gain ◽  
Survival Rate ◽  
Growth Performance ◽  
Wheat Flour ◽  
Labeo Rohita ◽  
Stocking Density ◽  
Quality Parameters ◽  
Whole Wheat Flour ◽  
Growth And Survival ◽  
Whole Wheat

The efficacy and suitability of dietary whole wheat flour supplementation was evaluated on the growth performance and survival of rohu (Labeo rohita). The study was conducted in 12 experimental aquaria at the Wet Laboratory, Department of Aquaculture, Bangladesh Agricultural University, Mymensingh. A total of 180 fingerlings of mean initial weight of 1.744±00 g were stocked at the same stocking density (268 fingerlings/m3). Four different treatments (T1, T2, T3 and T4) each with three replications were performed having different level of whole wheat flour such as 0% whole wheat flour (T1), 5% whole wheat flour (T2), 10% whole wheat flour (T3) and 15% whole wheat flour (T4). Feeds were supplied at 5% body weight twice daily in the morning at 9.00 am and in the afternoon at 5.00 pm throughout the study period. The rations were adjusted every week when new weights of the fish for various experimental aquariums were determined. At the end of the 63 days study period, the growth performance parameters such as mean final weight (g), weight gain (g), percent weight gain (%), specific growth rate (%/day) and the best feed utilization in terms of food conversion ratio were found highest at treatment 4 where fishes were fed with inclusion of 15% whole wheat flour and lowest was found at treatment 1 (fed with inclusion of 0% whole wheat flour). Water quality parameters were within the acceptable range and survival rate was found 100% in all treatment. Therefore, it can be concluded that treatment 4 (highest growth performance and survival rate of L. rohita with supplementation of 15% whole wheat flour containing diet) can be chosen by fish farmers for commercial culture of this species. Res. Agric., Livest. Fish.6(2): 345-352, August 2019

scholarly journals Pengaruh ketinggian air dalam pemeliharaan larva ikan hias botia (Chromobotia macracanthus, Bleeker)

2014 ◽  
Vol 1 (1) ◽  
pp. 24 ◽  
Author(s):  
Maulina Sari ◽  
Muhammad Hatta ◽  
Asep Permana
Keyword(s):  
Weight Gain ◽  
Survival Rate ◽  
Water Level ◽  
Fish Larvae ◽  
Quality Parameters ◽  
Water Levels ◽  
Average Weight ◽  
Larval Rearing ◽  
Growth And Survival ◽  
Average Value

Penelitian ini bertujuan untuk mengetahui pengaruh ketinggian air yang berbeda terhadap pertumbuhan dan kelangsungan hidup larva ikan botia (Chromobotia macracanthus, Bleeker). Hasil penelitian menunjukkan bahwa sintasan atau kelangsungan hidup tertinggi terdapat pada perlakuan B dengan ketinggian air 10 cm yaitu sebesar 98.88%, sedangkan kelangsungan hidup terendah terdapat pada perlakuan A dengan ketinggian air 5 cm yaitu sebesar 97.99%. Pertambahan bobot nilai tertinggi terjadi pada perlakuan A dengan ketinggian air 5 cm dengan nilai bobot rata–rata 0.02252 gr dan pertambahan bobot rata–rata terendah terjadi pada perlakuan C dengan ketinggian air 15 cm yaitu sebesar 0.01132 gr. Pertambahan panjang rata–rata tertinggi terjadi pada perlakuan A yaitu sebesar 0.42 cm dan yang terendah terjadi pada perlakuan B yaitu sebesar 0.29 cm. Parameter kualitas air selama penelitian masih dalam kisaran optimal dimana suhu 24,3–28,9oC, pH 6,5–7,0, DO 6,84–7,69 ppm, NH3 0,00–0,03 ppm, NO2 0,00–0,07 ppm. Analisis statistik dengan uji F diperoleh bahwa ketinggian air yang berbeda dalam pemeliharaan larva ikan botia (C. macracanthus, Bleeker) berbeda sangat nyata (P>0.01) terhadap pertambahan bobot dengan nilai Fhitung (21.00) > Ftabel (10.92), dan berbeda sangat nyata terhadap pertambahan panjang dengan nilai Fhitung (23.56) > Ftabel (10.92), sedangkan untuk sintasan atau kelangsungan hidup tidak berbeda nyata antar perlakuan. Hasil uji BNT menunjukkan, setiap perlakuan memberikan pengaruh terhadap pertumbuhan dan tidak berpengaruh terhadap kelangsungan hidup.The study aims to determine the effect of different water levels on the growth and survival of fish larvae Botia (Chromobotia macracanthus, Bleeker). The results showed that the survival rate was highest in treatment B with the water level was 10 cm which was equal to 98.88 %, whereas the lowest survival rate was found in treatment A with the water level was 5 cm which was equal to 97.99 %. The highest value of weight gain occurred in treatment A with average value in weight was 0.02252 g and the average weight gain was lowest in the treatment of C that reached 0.01132 g. The highest growth of length was occured in treatment A that was equal to 0.42 cm and the lowest occurred in treatment B that was 0.29 cm. Water quality parameters during the study were in the tolerance range where the optimum temperature were 24,3-28,9 oC , pH 6.5 to 7.0, DO 6.84 to 7.69 ppm, NH3 0.00 to 0.03 ppm , NO2 0.00 to 0.07 ppm . Statistical analysis by F test showed that the different water levels in the larval rearing of fish Botia (C. macracanthus, Bleeker) was significantly different ( P > 0.01) in the weight gain with the value of Fcount ( 21.00 ) > Ftable ( 10.92 ), and it was significantly different against the length with the value of F count ( 23:56 ) > F table ( 10.92), while for the survival rate showed has not significantly different between treatments. The LSD test showed that all the treatment were effected the growth rate, but not for survival rate.

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 THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)

2018 ◽  
Vol 13 (2) ◽  
pp. 63
Author(s):  
Haryati Haryati ◽  
Yushinta Fujaya ◽  
Early Septiningsih
Keyword(s):  
Survival Rate ◽  
Artificial Diet ◽  
Control Treatment ◽  
Larval Rearing ◽  
Mud Crab ◽  
Artificial Diets ◽  
Growth And Survival ◽  
The Third ◽  
Crab Larvae ◽  
Research Experiment

Live foods such as rotifers and Artemia are commonly used as foods in larval rearing of mud crab (S. olivacea). However, the continuous availability and nutritional consistency of live foods are difficult to control. Thus, the development of artificial diets to partially or fully replaced live foods is needed to overcome the limitations of live foods. The purpose of this research was to determine the best stage at which mud crab larvae can be weaned from live foods to artificial diets. The research experiment consisted of: treatment-1, the larvae were fed with live foods from zoea-1 to megalopa stages as the control treatment; treatment-2, the larvae were fed with artificial diet from zoea-2 to megalopa stages; and treatment-3, the larvae were fed with artificial diet from zoea-3 to megalopa stages. In treatment-4, artificial diet was given from zoea-4 to megalopa stages. The growth and survival rate of larvae in treatment-1, 3, and 4 were not significantly different (P>0.05) but significantly different with treatment-2. Based on the present results, this study suggests that artificial diet can be given to mud crab larvae (S. olivacea) from the third zoea stage.

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