Growth performance of 7-g Anguilla bicolor bicolor at different density

ABSTRACT This research was conducted to evaluate the performance of eel production at stocking density of 2 g/L, 3 g/L, and 4 g/L reared in recirculating system for 60 days. The experimental design used was completely randomized design. Fish were fed on sinking pellet given according to body weight. Collected data were survival, specific growth rate, biomass growth, feed convertion ratio, weight variance, blood profile, blood glucose, and cortisol levels.The results showed that the best performance was found in 4 g/L density with specific growth rate and biomass growth were 0.99±0.30 and 7.50±4.13 g/day, feed conversion ratio of 1.22±0.58, and weight variance of 21.72±3.60%. Stress responses parameters which consisted of cortisol and blood glucose levels showed no significant difference at 22.45± 8.59 nm/L and 31.92± 4.29 mg/dL, respectively. Blood profile in form of hemoglobin, hematocrit, red blood cell and differential leukocytes showed no significant differences except for the leukocyte parameters with the highest rate was achieved at the stocking density of 4 g/L (2.70±0.001x105 sel/mm3). In conclusion, the stocking density of 4 g/L produced the best physiological and production performance. Keywords: stocking density, growth, physiological response, eel, recirculation system ABSTRAK Penelitian ini bertujuan untuk mengevaluasi kinerja produksi dan respons fisiologis ikan sidat pada padat tebar 2 g/L, 3 g/L, dan 4 g/L dalam sistem resirkulasi selama 60 hari. Rancangan percobaan yang digunakan adalah rancangan acak lengkap. Pakan berupa pelet tenggelam diberikan sesuai bobot tubuh. Data yang diambil meliputi kelangsungan hidup, laju pertumbuhan spesifik, laju pertumbuhan biomassa, konversi pakan, koefisien keragaman bobot, gambaran darah, kadar glukosa darah, dan kadar kortisol. Hasil penelitian menunjukkan bahwa padat tebar berpengaruh nyata (P<0,05) terhadap laju pertumbuhan biomassa; pertumbuhan biomassa terbaik dicapai pada kepadatan 4 g/L dengan laju pertumbuhan spesifik dan laju pertumbuhan biomassa sebesar 0,99±0,30 dan 7,50±4,13, konversi pakan sebesar 1,22±0,58, dan koefisien keragaman sebesar 21,72±3,60%. Parameter respons stres yaitu kadar kortisol dan glukosa darah tidak menunjukkan perbedaan yang nyata, yaitu masing-masing sebesar 22,45±8,59 nm/L serta 31,92±4,29mg/dL. Gambaran darah berupa hemoglobin, hematokrit, jumlah sel darah merah dan diferensial leukosit tidak menunjukkan perbedaan yang nyata (P>0,05), kecuali pada parameter leukosit dengan nilai terbaik pada perlakuan 4 g/L (2,70±0,001 x105 sel/mm3). Hasil penelitian menunjukkan bahwa padat tebar 4 g/L menghasilkan kinerja fisiologis dan produksi terbaik. Kata kunci: padat tebar, pertumbuhan, respons fisiologis, ikan sidat, sistem resirkulasi

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Survival and growth responses of snakehead fish Channa striata Bloch. juvenile in aerated and unaerated acid sulfate water

Jurnal Akuakultur Indonesia ◽

10.19027/jai.16.1.60-67 ◽

2017 ◽

Vol 16 (1) ◽

pp. 60

Author(s):

, Purnamawati ◽

Daniel Djokosetiyanto ◽

Kukuh Nirmala ◽

Enang Harris ◽

Ridwan Affandi

Keyword(s):

Growth Rate ◽

Blood Glucose ◽

Specific Growth Rate ◽

Feed Efficiency ◽

Specific Growth ◽

Stocking Density ◽

Water Volume ◽

Growth Responses ◽

Acid Sulfate ◽

Channa Striata

ABSTRACT The aim of the research was to analyze survival rate, specific growth rate, albumin, and feed efficiency and physiological (blood glucose, cortisol, dan haemoglobin) responses of snake head fish juvenil that reared at aerated and unaerated of tidal land water have been conducted in the laboratory. Experiments using completely randomized design with aerated and unaerated as a treatment, and each treatment has twelve replications. The snakehead fish juvenil wich length 2.4±0.2 cm and weight of 0.21±0.05 g reared in the aquarium that are size 30×25×35 cm (water volume 25 L) with a stocking density 2 juvenile/L, for 40 days. The fishes were fed with commercial feed with protein content about 40%, feeding two times a day (morning and afternoon) were at satiation. Replacement of water done every two days about 10% of the total water volume in the aquarium. The results showed that unaerated median significantly affected to biometric and physiological response of juvenile of snake head fish. The media un-aerated gives the best results shown by the higher value of survival (92%), specific growth rate (6.73%/ day), feed efficiency (78.22%), protein retention (41.91%), energy retention (30.81%) value of albumin (6.60 g/100 mL) and the haemoglobin (5.58 g/dL), and have the lowest value of cortisol (21.49 ng/L) and blood glucose (43.36 mg/100 mL). Keywords: acid sulfate water, growth rate, aeration, Channa striata ABSTRAK Penelitian ini bertujuan untuk menganalisis respons kelangsungan hidup, pertumbuhan spesifik, albumin, dan efisiensi pakan dan fisiologis (kortisol, glukosa darah, dan hemoglobin) juvenil ikan gabus yang dipelihara dengan dan tanpa aerasi pada media air rawa pasang surut. Penelitian menggunakan rancangan acak lengkap dengan aerasi dan tanpa aerasi sebagai perlakuan, dan masing-masing perlakuan memiliki 12 ulangan. Juvenil ikan gabus berukuran panjang 2,4±0,3 cm dan bobot 0,21±0,03 g dipelihara dalam akuarium 30×25×35 cm (volume 25 L) dengan padat tebar 2 ekor/L, selama 40 hari. Ikan diberi pakan berupa pakan komersial dengan kadar protein ±40%, pemberian pakan dua kali sehari (pagi dan sore) at satiation. Penggantian air dan penyiponan dilakukan dua hari sekali sebanyak 10% dari volume total dalam akuarium. Hasil penelitian menunjukkan bahwa perlakuan tanpa aerasi berpengaruh nyata terhadap respons biometrik dan fisiologis juvenil ikan gabus. Media tanpa aerasi memberikan hasil yang lebih baik ditunjukkan oleh kelangsungan hidup (92%), laju pertumbuhan spesifik (6,73%/ hari), efisiensi pakan (78,22%), retensi protein (41,91%), retensi energi (30,81%), kadar albumin (6,60 g/100 mL), dan hemoglobin (5,85 g/dL) yang lebih tinggi, sedangkan kadar kortisol (219 ng/L) dan glukosa darah (43,36 mg/100 mL) yang terendah. Kata kunci: media sulfat masam, pertumbuhan, aerasi, Channa striata

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Tambatinga juveniles performance in a recirculation aquaculture system with different stocking densities

Research Society and Development ◽

10.33448/rsd-v9i5.3317 ◽

2020 ◽

Vol 9 (5) ◽

pp. e178953317 ◽

Cited By ~ 1

Author(s):

Rebeca Maria Sousa ◽

Romério Rodrigues dos Santos Silva ◽

Anália Sousa dos Santos ◽

Camila Vieira da Silva ◽

João Avelar Magalhães ◽

...

Keyword(s):

Growth Rate ◽

Weight Gain ◽

Specific Growth Rate ◽

Specific Growth ◽

Stocking Density ◽

Field Research ◽

Experimental Period ◽

Feed Conversion ◽

Significant Difference ◽

Final Survival

In a quantitative field research, the objective of this work was to determine the best stocking density for tambatinga juveniles (Colossoma macropomum × Piaractus brachypomus) in a recirculation system during 50 days of cultivation. Tambatinga juveniles (0.72±0.02 g) were distributed in 0.08 m3 polyethylene boxes with densities of 5, 10 and 15 fish/box, with five replicates per treatment. During the experimental period, water quality, weight gain, apparent feed conversion, specific growth rate, carcass yield, proximate composition and final survival were evaluated. The water parameters remained stable and in the desired range for the species during the experimental period (temperature 25±1.52° C, pH 5.85±0.7 and dissolved oxygen 6.51±0.05 mg L-1). Statistical analyzes showed no significant difference for apparent feed conversion and survival rate. The lowest stocking density (5 fish/box) showed greater weight gain and specific growth rate, while the density of 10 fish/box showed high lipid deposition in the carcass. Aiming at greater weight gain and better specific growth rate, the results indicated that the density of 5 fish/box (0.08 m3), is the most suitable for juveniles of this species.

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EFFECT OF STOCKING DENSITY ON THE GROWTH PERFORMANCE OF RED TILAPIA IN ZEOLITE SUPPLEMENTED CLOSED SYSTEM

Jurnal Teknologi ◽

10.11113/jurnalteknologi.v83.17146 ◽

2021 ◽

Vol 83 (5) ◽

pp. 85-92

Author(s):

Ku Boon Hong ◽

Musfiroh Jani ◽

Rabiatul Adawiyah Meor Mohamad Zain ◽

Norashikin Mohd Fauzi

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Growth Performance ◽

Closed System ◽

Specific Growth ◽

Stocking Density ◽

World Population ◽

Red Tilapia ◽

Significant Difference ◽

Length Gain

Food demand is expected to surge due to the increase of world population. Malaysia is one of the top fish consumption countries in Asia, but the reduction of capture fishery has led to the increase for aquaculture for tilapia to overcome the demand. Thus, the objective of this study was to compare the growth performance of red tilapia at different stocking densities of zeolite supplemented closed system. Red tilapia fry was stocked into aquarium. Five treatments (containing zeolite and without zeolite) with two replicates were used. Food was given twice a day with 2% of total biomass of the fish. Weight and length of red tilapia were measured every two weeks. The zeolite treatments which recorded the highest final mean weight was T1 with the lowest stocking density (5 fish) while in T5 (highest stocking density), lowest mean weight was recorded. Specific growth rate and length gain in T1 was significantly higher than other treatments. On the other hand, there was no significant difference in growth parameters between the treatments with and without zeolite. The results revealed that red tilapia stocked in the T1 of the lowest stocking density (5 fish) had the highest growth performance than the fish in other treatments. Compared to other treatments, T1 recorded the highest final length and weight, weight and length gain, Specific Growth Rate % (SGR) among the treatments. The findings will be useful for the practitioners to understand the best practice for stocking density in zeolite supplemented closed system.

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Utilization of fish waste as fish meal substitute in formulated fish diet on the growth performance of Nile tilapia fish fry (Oreochromis niloticus)

Food Research ◽

10.26656/fr.2017.5(s4).001 ◽

2021 ◽

Vol 5 (S4) ◽

pp. 21-29

Author(s):

Anizah M.R. ◽

S.R. Manaf ◽

Hilaliyah M.J.N.

Keyword(s):

Growth Rate ◽

Weight Gain ◽

Specific Growth Rate ◽

Protein Level ◽

Nile Tilapia ◽

Fish Meal ◽

Specific Growth ◽

Fish Diet ◽

Fish Waste ◽

Significant Difference

Fish meal is generally expended as the foremost protein supply in the fish diet. The rising cost of this component inflicted the aquaculture industry to seek a substitute in lessening the pellet cost. Thus, fish waste was tested in this study to investigate its viability. An experiment was performed to study the effects of fish waste and carcass on the growth performance of Nile tilapia fry. Solid fish waste of three different common species available in Mukah’s wet market was formulated into an artificial diet. The diet was formulated into three treatments consist of three protein levels (40%, 45% and 50%) with 4000 kcal/kg energy. A controlled group was fed with a commercial pellet consisting of 45% protein level. Fish were fed at 4% of body weight twice daily for 45 days. Fry reared in a controlled group was discovered highest weight gain, specific growth rate and length gain. There was no significant difference in all treatments for all parameters measured. The lowest weight gain and specific growth rate were recorded in fish fed 45% protein level (T2) group. Fish in T3 (50%) achieved the highest survival rate while T1 (40%) group recorded the lowest. The best and lowest Feed Conversion ratio (FCR) was recorded in the control group. In conclusion, the performance of formulated feed using fish waste is similar to commercial pellet as no significant difference can be observed in all parameters measured.

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Growth performance of siamese gourami Trichopodus pectoralis seed with different stocking density to optimize production capacity: optimum temperature and salinity application

E3S Web of Conferences ◽

10.1051/e3sconf/20184702007 ◽

2018 ◽

Vol 47 ◽

pp. 02007

Author(s):

Lies Setijaningsih ◽

Dewi Puspaningsih ◽

Imam Taufik

Keyword(s):

Growth Rate ◽

Survival Rate ◽

Specific Growth Rate ◽

Growth Performance ◽

Specific Growth ◽

Production Capacity ◽

Stocking Density ◽

Optimum Temperature ◽

Slow Growth Rate ◽

Randomized Design

Fulfill needs of Siamese gourami still rely on the catch from nature, so the population in nature has become decreased. The increase of Siamese gourami fish production from culture is still constrained by the survival rate and slow growth rate in the seed phase. The purpose of this research was to determine the effect of Siamese gourami stocking density on the application of optimum temperature and salinity to growth performance for optimization of production capacity. Application of optimum temperature and salinity refers to the results of previous research, i.e., temperature of 28 °C and salinity 3 ‰. Siamese gourami seed with length of 2.96 ± 0.42 cm and weight of 5.27 ± 0.10 g used in the research. The experimental design used completely randomized design with four treatments, i.e. 1 fish L-1, 2 fish L-1, 3 fish L-1 and 4 fish L-1. The results showed that there were an effect of different stocking density on absolute growth weight and length, survival rate, specific growth rate and productivity. This is shown in the C treatment which growth was 4.95 ± 0.037 g, length 3.51 ± 0.01 cm, survival rate 93.47%, specific growth rate 1.22% and fish productivity of 625.76 g.

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Growth performance of 3-g Anguilla bicolor bicolor at different density

Jurnal Akuakultur Indonesia ◽

10.19027/jai.13.46-53 ◽

2015 ◽

Vol 13 (1) ◽

pp. 46

Author(s):

Sufal Diansyah ◽

Tatag Budiardi ◽

Agus Oman Sudrajat

Keyword(s):

Blood Glucose ◽

Specific Growth ◽

Stocking Density ◽

Growth Stress ◽

Feed Conversion ◽

Blood Profile ◽

Randomized Design ◽

Recirculation System ◽

Completely Randomized Design ◽

Average Body

ABSTRACT This study was carried out to evaluate growth performancce of eel (Anguilla bicolor bicolor) at the density of 2 g/L, 3 g/L, and 4 g/L in the recirculation system. The experimental design used was completely randomized design with three replications. The eel used for this study was Anguilla bicolor bicolor at stadia elver with average body weight of 3 g/fish. Fish were reared for 60 days. Analysis of the blood profile and blood glucose level were done every ten days, while cortisol measurement was performed three times on the day-0, 30, and 60. Results showed that stocking density affected biomass growth. The best stocking density was 4 g/L with the growth of 10.62 g biomass/day, the specific growth of 1.47%, 1.16 feed conversion, and survival of 96.24%. All treatments did not give significant effect on the blood glucose and cortisol level. Keywords: elver, stocking density, growth, stress response, recirculation system ABSTRAK Penelitian ini dilakukan untuk mengevaluasi kinerja pertumbuhan ikan sidat (Anguilla bicolor bicolor) dengan padat tebar 2 g/L, 3 g/L, dan 4 g/L dalam sistem resirkulasi. Rancangan percobaan yang digunakan adalah rancangan acak lengkap dengan tiga ulangan. Ikan sidat yang digunakan adalah spesies Anguilla bicolor bicolor stadia elver dengan bobot rata-rata 3±1 g/ekor. Pemeliharaan dilakukan selama 60 hari. Analisis gambaran darah dan glukosa darah dilakukan setiap sepuluh hari sekali, sedangkan pengukuran kortisol dilakukan sebanyak tiga kali yaitu pada hari ke-0, 30, dan 60. Hasil penelitian menunjukkan bahwa perlakuan padat tebar berpengaruh nyata terhadap laju pertumbuhan biomassa. Padat tebar terbaik adalah 4 g/L dengan laju pertumbuhan biomassa 10,62 g/hari, laju pertumbuhan spesifik 1,47%, konversi pakan 1,16, dan sintasan 96,24%. Semua perlakuan padat tebar tidak memberikan pengaruh yang nyata terhadap kadar glukosa darah dan kortisol. Kata kunci : elver, padat tebar, pertumbuhan, respons stres, sistem resirkulasi

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The Effect of Ploidy on Growth and Feeding Pattern of Diploid and Triploid Turbot Scophthalmus maximus Under Communal Rearing Condition

Turkish Journal of Fisheries and Aquatic Sciences ◽

10.4194/1303-2712-v21_6_02 ◽

2021 ◽

Vol 21 (06) ◽

pp. 275-281

Author(s):

Ilhan Aydin

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Specific Growth ◽

Scophthalmus Maximus ◽

Average Weight ◽

Feed Conversion ◽

Farmed Fish ◽

Conversion Rates ◽

Significant Difference ◽

Turbot Scophthalmus Maximus

Triploidy induction is a useful tool to produce sterile fish that prevents interbreeding of farmed fish with wild counterparts. In this study, growth performance and feed conversion rates of 12-months old diploid and triploid turbot that reared both communally and separately for 16 months at constant water temperature determined. At the end of the experiment, diploid, triploid, and communally reared groups reached an average weight of 672.4±21.0 g, 659.2±25.3 g and 660.5±12.0 g, respectively. Any significant differences were not observed in the weight of separately reared diploid and triploid turbot groups. In contrast, triploid fish in the communal group were significantly heavier than diploids at the end of the rearing period. The feed conversion rate of the ploidy group did not show any significant difference between groups. The highest mean specific growth rate was observed in the triploids in communal groups, whereas the diploids in communal groups had the lowest mean specific growth rate. The weight and length gain rates of the groups were similar. Diploid turbot growth appeared to be negatively affected by communal ploidy rearing. The results of the present study indicate that triploid turbot farm escapees may be advantageous in terms of growth in nature.

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Evaluation of larvae production and growth of juvenile red tilapia NIFI F1 during the nursery phase

Jurnal Iktiologi Indonesia ◽

10.32491/jii.v18i3.420 ◽

2019 ◽

Vol 18 (3) ◽

pp. 251

Author(s):

Adam Robisalmi ◽

Priadi Setyawan ◽

Bambang Gunadi

Keyword(s):

Growth Rate ◽

Survival Rate ◽

Specific Growth Rate ◽

Seed Production ◽

Specific Growth ◽

Stocking Density ◽

Brood Stock ◽

Female Ratio ◽

Red Tilapia ◽

Ad Libitum

Genetic quality improvement can be done through breeding programs. The indicator of success in the selection is the improvement of the character of production. Larval production and growth of NIFI of F1generation red tilapia seeds in the selection and its control parents were evaluated in this study. The research was conducted at the Fish Breeding Research Center for four months. Spawning was carried out on freshwater ponds of cage with size of 1 x 1 m. Tilapia brood stock were stocked with male to female ratio of 1: 1. The larvae rearing were conducted in the cage with size 2x2x1 m3 and stocking density 125 m-2. Pellets with a protein content of 38-40% are given to ad libitum larvae three times a day for first month, and then feeding rate was given 15-20% daily from biomass. Seed production, growth, specific growth rate, and survival rate were observed. The results of the experiment show a difference between fish selected and control. Seed production of selection reached 540 ± 114 and controls 508 ± 142. The growth performance of selected red tilapia juvenile showed higher compared with the control. The mean length of selected population reached 6.33 ± 0.43 cm , weight gain 6.60 ± 0.52 g, specific growth rate 7.33 ± 0% g days-1 and survival rate 81.50 ± 4.46% were respectively and the control population 5.76 ± 0.52 cm ; 4,90 ± 0.58 g; 4.50 ± 0.35% g days-1; and 74.85 ± 3.26%. These values indicate that the growth of red tilapia juvenile NIFI F1 generation was increased 25.76%.AbstrakSalah satu upaya yang dapat dilakukan untuk meningkatkan kualitas genetik yaitu melalui program pemuliaan. Per-baikan karakter reproduksi dan pertumbuhan dapat digunakan sebagai indikator keberhasilan seleksi. Penelitian ini bertujuan untuk mengevaluasi produksi larva dan pertumbuhan benih ikan nila merah NIFI F1 dari induk seleksi dan kontrol. Kegiatan dilaksanakan selama empat bulan di Balai Riset Pemuliaan Ikan. Pemijahan dilakukan di kolam air tawar pada hapa 1 m x1 m. Perbandingan induk ikan nila jantan dan betina 1:1. Larva yang sudah dipanen dimasukkan pada hapa pendederan ukuran 2x2x1 m3 dengan padat tebar 125 ekor m-2 . Selama pendederan , larva diberi pakan (protein 38-42%) secara ad libitum tiga kali sehari pada bulan pertama dan selanjutnya diberi pakan dua kali sehari 15-20% dari biomassa. Pakan yang diberikan selama pendederan mempunyai protein berkisar 38-42%. Parameter yang diamati meliputi produksi larva, pertumbuhan, laju pertumbuhan spesifik, dan sintasan. Hasil penelitian menunjukkan produksi larva ikan nila merah seleksi yaitu 540±114 ekor dan kontrol 508±142 ekor. Performa pertumbuhan benih ikan nila merah seleksi menunjukkan hasil yang lebih tinggi dibanding kontrol dengan nilai pertumbuhan panjang 6,33 ±0,43cm, pertumbuhan bobot 6,60±0,52 g, laju pertumbuhan spesifik 7,33±0% g hari-1 serta sintasan 81,50±4,46%, se-dangkan populasi kontrol masing-masing 5,76±0,52 cm; 4,90±0,58 g; 4,50±0,35% g hari-1; dan 74,85±3,26%. Nilai ini menunjukkan bahwa ada peningkatan pertumbuhan sebesar 25,76% pada benih ikan nila merah NIFI F1.

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Growth Kinetic Study on Lyophilized and Cryopreserved Pleurotus sajor-caju Spawn

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.754-755.1076 ◽

2015 ◽

Vol 754-755 ◽

pp. 1076-1080

Author(s):

Sharul Aida Mohd Shayuti ◽

Shi Fern Chong ◽

Zarina Zakaria ◽

Dachyar Arbain ◽

Noorulnajwa Diyana Yaacob

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Doubling Time ◽

Specific Growth ◽

Maximum Growth ◽

Maximum Growth Rate ◽

Maximum Specific Growth Rate ◽

High Survival ◽

Significant Difference ◽

Preservation Technique

A study was conducted to determine the most optimal preservation technique for P. sajor-caju spawns which produce maximum specific growth rate and shortest doubling time by using contois kinetic model. The analyzed experimental data showed that lyophilized P. sajor-caju spawn showed the highest maximum specific growth rate, and shortest doubling time compared to cryopreserved P. sajor-caju spawn and 4oC stored P. spawn. There was no significant difference in aspect of growth rate between the lyophilization and cryopreservation techniques which were; 0.148 (μmax)/ (g/day) and 0.147(μmax)/ (g/day) respectively. Based on the result, lyophilization technique was considered as the best preservation technique for preserving P. sajor-caju spawn due to high maximum growth rate which indicates high survival after exposure to preservation treatment.

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Jenis Dan Pengaruh Keberadaan Alga Filamen Pada Kegiatan Budidaya Eucheuma cottonii Di Perairan Teluk Kotania, Seram Bagian Barat, Maluku (The Effect of the Existence of Filament Algae on Eucheuma Cottonii Cultivation Activity in Kotania Gulf Waters, West Seram, Maluku)

Jurnal Sains Terapan ◽

10.29244/jstsv.3.1.8-15 ◽

1970 ◽

Vol 3 (1) ◽

pp. 8-15

Author(s):

Wahyu Purbiantoro ◽

Wida Lesmana ◽

Hairarti Arfah

Keyword(s):

Growth Rate ◽

Specific Growth Rate ◽

Specific Growth ◽

Local People ◽

Algae Biomass ◽

Significant Difference ◽

Biomass Ratio ◽

Eucheuma Cottonii

The success of Eucheuma cottonii cultivation in the Gulf Kotania, West Seram, Maluku was influenced by various factors, one of them was the existence of filament algae. This study aims to identify filament algae patching on the thalus E. cottonii, the influence of filament algae biomass on specific growth rate (SGR) of E. cottonii in trial raft and the differences of filament algae biomass patching on the thalus E. cottonii cultivated by local people in three different locations. The first study was conducted in trial raft, then the identifications and measurements of filament algae biomass patching on the thalus and the measurements of E. cottonii biomass were performed on day 34 and 50. In the second study, the identifications and measurements of filament algae biomass patching on the thalus E. cottonii has been done on the three difference locations where E. cottonii has been cultivated by local people. The results showed that Lyngbia sp. was a species of filament algae found in thalus E. cottonii in which the algae patch on. The presence of filament algae on the thalus with biomass ratio 1:81, did not affect significantly on SGR of E. cottonii in trial raft. Meanwhile, filament algae biomass obtained from three different locations showed a significant difference, where the filament algae biomass in Wael Village was the highest.Keywords: Filament Alga, Lyngbia sp., Eucheuma cottonii, Gulf Kotania

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