Pub Date : 2022-04-18DOI: 10.20884/1.oa.2022.18.s1.975
Muhamad Amril Idrus, Krisnawan Nandito, Annisa Megia Sari
East Nusa Tenggara (NTT) Province has many business potentials in the marine and fisheries sectors, especially fish as a commodity. East Flores District is one of the fish landing centers for fishing vessels in the East Nusa Tenggara Province. The objective of this study was to determine the activities of fishing vessels and to find out the catches that have been landed at Amagarapati Fish Landing Port. The location of this study was determined by purposive sampling, while the research location was carried out at Amagarapati Fish Landing Port. This research was conducted in July-October 2021. A descriptive survey was chosen as the data collection method by conducting direct observations in the field such as giving interviews and distributing questionnaires to the fishermen and Amagarapati Fish Landing Port’s employees. The results of this study showed that fishing activities at Amagarapati Fish Landing Port were running normally as usual even though Implementation of restrictions on community activities (PPKM) was implemented in East Flores Regency, the fish caught were dominated by Skipjack, Mackerel Tuna, Tuna, Mackerel Scad, and Atlantic Menhaden. There was an obstacle in the decline in fish prices due to the decline in people's purchasing power, tuna exports to the United States experienced a decline due to the lockdown destination countries. The catch that landed at Amagarapati Fish Landing Port 2,527.5 Tons of catches were reduced due to bad weather, the availability of fish bait for pole and line vessels was limited so that it hampered fishing activities.Keywords: Amagarapati Fish Landing Port, Fish Catch, and Fishing Vessels
{"title":"Catch Fish Profile at Amagarapati Fish Landing Port, East Flores Regency, East Nusa Tenggara Province","authors":"Muhamad Amril Idrus, Krisnawan Nandito, Annisa Megia Sari","doi":"10.20884/1.oa.2022.18.s1.975","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.s1.975","url":null,"abstract":"East Nusa Tenggara (NTT) Province has many business potentials in the marine and fisheries sectors, especially fish as a commodity. East Flores District is one of the fish landing centers for fishing vessels in the East Nusa Tenggara Province. The objective of this study was to determine the activities of fishing vessels and to find out the catches that have been landed at Amagarapati Fish Landing Port. The location of this study was determined by purposive sampling, while the research location was carried out at Amagarapati Fish Landing Port. This research was conducted in July-October 2021. A descriptive survey was chosen as the data collection method by conducting direct observations in the field such as giving interviews and distributing questionnaires to the fishermen and Amagarapati Fish Landing Port’s employees. The results of this study showed that fishing activities at Amagarapati Fish Landing Port were running normally as usual even though Implementation of restrictions on community activities (PPKM) was implemented in East Flores Regency, the fish caught were dominated by Skipjack, Mackerel Tuna, Tuna, Mackerel Scad, and Atlantic Menhaden. There was an obstacle in the decline in fish prices due to the decline in people's purchasing power, tuna exports to the United States experienced a decline due to the lockdown destination countries. The catch that landed at Amagarapati Fish Landing Port 2,527.5 Tons of catches were reduced due to bad weather, the availability of fish bait for pole and line vessels was limited so that it hampered fishing activities.Keywords: Amagarapati Fish Landing Port, Fish Catch, and Fishing Vessels","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44631462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-18DOI: 10.20884/1.oa.2022.18.s1.983
Ikhsan Khasani, A. Sopian, F. Anggraini, W. Pamungkas
The high productivity and quality of the harvested prawn are the main objectives of the intensive giant freshwater prawn (GFP) culture. Therefore, the breeding program to create a superior strain of the prawn has been conducted in several countries to support prawn farming. The purpose of this study was to evaluate the productivity and female reproductive performance of the GFP superior strains, namely the selected GI Macro (GI) and Siratu (SR) in the three farming conditions. The GI has resulted from an individual selection program based on standard length and maturation level characters. The multi-location test was conducted in the grow-out phase for 90 days at the three locations based on altitude, namely low-lands (in Subang, 10-25 m above the sea level, asl), medium-lands (in Ciamis, 70-100 m asl), high-lands (in Kuningan, 700-800 m asl). The growth characters consisting of total length/TL, standard length/SL, and body weight/BB of GI and SR were not significantly different, both on the Low, medium, and high lands ponds. The survival rate of the GI (87,3±7.26%) was significantly higher than the SR (71.0±0.08%) in the medium-land pond. In the high-lands pond, the survival rate of the SR (72.33±0.32%) was significantly higher than the GI (55.8±6.27%). Meanwhile, the productivity and percentage of the gravid female in the low-lands pond were not significantly different. The data suggested that the selected GI Macro is a location-specific genotype, more suitable to be cultured in the low and moderate-lands pond with warm temperature characteristics. Keywords: freshwater prawn, growth, multi-location, reproduction
{"title":"Growth, survival rate, and reproductive performance of two superior strains of the giant freshwater prawn (Macrobrachium rosenbergii)","authors":"Ikhsan Khasani, A. Sopian, F. Anggraini, W. Pamungkas","doi":"10.20884/1.oa.2022.18.s1.983","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.s1.983","url":null,"abstract":"The high productivity and quality of the harvested prawn are the main objectives of the intensive giant freshwater prawn (GFP) culture. Therefore, the breeding program to create a superior strain of the prawn has been conducted in several countries to support prawn farming. The purpose of this study was to evaluate the productivity and female reproductive performance of the GFP superior strains, namely the selected GI Macro (GI) and Siratu (SR) in the three farming conditions. The GI has resulted from an individual selection program based on standard length and maturation level characters. The multi-location test was conducted in the grow-out phase for 90 days at the three locations based on altitude, namely low-lands (in Subang, 10-25 m above the sea level, asl), medium-lands (in Ciamis, 70-100 m asl), high-lands (in Kuningan, 700-800 m asl). The growth characters consisting of total length/TL, standard length/SL, and body weight/BB of GI and SR were not significantly different, both on the Low, medium, and high lands ponds. The survival rate of the GI (87,3±7.26%) was significantly higher than the SR (71.0±0.08%) in the medium-land pond. In the high-lands pond, the survival rate of the SR (72.33±0.32%) was significantly higher than the GI (55.8±6.27%). Meanwhile, the productivity and percentage of the gravid female in the low-lands pond were not significantly different. The data suggested that the selected GI Macro is a location-specific genotype, more suitable to be cultured in the low and moderate-lands pond with warm temperature characteristics. Keywords: freshwater prawn, growth, multi-location, reproduction","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45483946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-25DOI: 10.20884/1.oa.2022.18.1.925
Gestar Rheido, Romi Novriadi, Muhammad Suhardi, S. Suharyadi, Sinar Pagi Sektiana, Margono Margono, Mugi Mulyono
Growth performance, survival rate, productivity, and carcass analysis were examined in the whole grow-out production system for Pacific white shrimp Litopenaeus vannamei fed four commercial diets over 15 weeks. Shrimp were held in twelve hapas nets with a size of 2 x 2 x 1 m and installed within the commercial ponds. The shrimp were stocked with the density of 100 shrimp m-2 per net in a completely randomized design (CRD). All feed used in this study was characterized with high protein levels within the range of 40 – 42% labeled as HP A and B; and medium protein levels (30 – 35%), labeled as MP A and B. Based on the proximate and nutritional profile analysis of the diet, the nutritional profile of HP B, MP A and MP B written on the feed bags showed an inconsistent results compared to the results of the test. Shrimp fed the highest protein level had higher final body weight; feed conversion ratio, thermal growth coefficient, survival rate and average daily growth compared to MP B. Shrimp fed higher protein level also exhibited the lowest feed conversion ratio compared to the group of shrimp fed with medium protein. The results obtained in this study indicated that with small difference in growth rates, especially between HP groups compared with MP A, there is still a chance to re-formulate the diet to produce a cost-effective diet that still fulfill the specific nutrient requirement of the shrimp. Feed did not influence the nutritional deposition of the whole body of shrimp, but it seemed due to the inappropriate drying techniques Keywords: Protein level, growth, carcass, Litopenaeus vannamei, specific nutrient
{"title":"Evaluation of commercial Pacific white shrimp Litopenaeus vannamei (Boone, 1931) feeds: growth performance and body carcass analysis","authors":"Gestar Rheido, Romi Novriadi, Muhammad Suhardi, S. Suharyadi, Sinar Pagi Sektiana, Margono Margono, Mugi Mulyono","doi":"10.20884/1.oa.2022.18.1.925","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.925","url":null,"abstract":"Growth performance, survival rate, productivity, and carcass analysis were examined in the whole grow-out production system for Pacific white shrimp Litopenaeus vannamei fed four commercial diets over 15 weeks. Shrimp were held in twelve hapas nets with a size of 2 x 2 x 1 m and installed within the commercial ponds. The shrimp were stocked with the density of 100 shrimp m-2 per net in a completely randomized design (CRD). All feed used in this study was characterized with high protein levels within the range of 40 – 42% labeled as HP A and B; and medium protein levels (30 – 35%), labeled as MP A and B. Based on the proximate and nutritional profile analysis of the diet, the nutritional profile of HP B, MP A and MP B written on the feed bags showed an inconsistent results compared to the results of the test. Shrimp fed the highest protein level had higher final body weight; feed conversion ratio, thermal growth coefficient, survival rate and average daily growth compared to MP B. Shrimp fed higher protein level also exhibited the lowest feed conversion ratio compared to the group of shrimp fed with medium protein. The results obtained in this study indicated that with small difference in growth rates, especially between HP groups compared with MP A, there is still a chance to re-formulate the diet to produce a cost-effective diet that still fulfill the specific nutrient requirement of the shrimp. Feed did not influence the nutritional deposition of the whole body of shrimp, but it seemed due to the inappropriate drying techniques Keywords: Protein level, growth, carcass, Litopenaeus vannamei, specific nutrient","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47409084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-11DOI: 10.20884/1.oa.2021.17.2.915
Chrisoetanto P. Pattirane, B. J. Pattiasina, Frederik Dony Sangkia
Crustacean larvae have the characteristics of living as carnivorous organisms. This has an impact on the length of gut evacuation time which affects the feeding pattern of the larvae. The feeding strategy of mud crab larvae is modulated by the length of gut evacuation time. Another factor that can be subject to modulation is the frequency of feeding. This research aimed to evaluate rotifer frequency feeding of early larvae stages of mud crab, Scylla olivacea. This research was conducted at the Mariculture Fisheries Center, Ambon with an indoor system. This research began with carrying out parental maintenance to produce larvae. Larvae are fed with rotifers with different frequencies. The treatments were the frequency of feeding rotifers, namely: Treatment 1 (F1) was the frequency of 1x a day (9:00 am); Treatment 2 (F2) was a frequency of 2x a day (9:00 am & 13:00 pm) and Treatment 3 (F3) was a frequency of 3x a day (9:00am, 13:00pm & 17:00pm). Each treatment was given 3 replications. Based on the results of this study, it showed that feeding with a frequency of three times a day (F3 treatment) was able to have a positive effect on the survival rate of zoea larvae which on the third day was 58% and the fourth day was 22% higher than the F1 and F2 treatments. The growth of larvae showed that F3 treatment was higher than F1 and F2 on the sixth day with an increase in the absolute value of growth of 0.12044 mm compared to F1 of 0.05531 mm and F2 of 0.03253 mm. Keywords: frequency of feeding, growth, larvae, survival rate, mud crab
甲壳纲幼虫具有肉食性生物的特征。这会影响肠道排空时间的长度，从而影响幼虫的进食模式。泥蟹幼虫的进食策略受到肠道排空时间长度的调节。另一个可能受到调制的因素是馈电频率。本研究旨在评估橄榄青蟹早期幼虫轮虫的频率进食。这项研究是在安汶海洋养殖渔业中心进行的，采用室内系统。这项研究始于进行亲代维护以产生幼虫。幼虫以不同频率的轮虫为食。处理为饲养轮虫的频率，即：处理1（F1）为每天1次（上午9:00）；治疗2（F2）的频率为每天2次（上午9:00和下午13:00），治疗3（F3）的频率是每天3次（上午9:00am、下午13:00pm和下午17:00pm）。每个处理给予3次重复。根据本研究的结果，每天三次喂食（F3处理）能够对zoea幼虫的存活率产生积极影响，第三天的存活率比F1和F2处理高58%，第四天高22%。幼虫的生长表明，F3处理在第6天高于F1和F2，与F1的0.05531 mm和F2的0.03253 mm相比，生长绝对值增加了0.12044 mm
{"title":"Effects of Rotifer Feeding Frequency on Growth and Survival Rate of Early Larval Stages of Mud Crab, Scylla olivacea","authors":"Chrisoetanto P. Pattirane, B. J. Pattiasina, Frederik Dony Sangkia","doi":"10.20884/1.oa.2021.17.2.915","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.915","url":null,"abstract":"Crustacean larvae have the characteristics of living as carnivorous organisms. This has an impact on the length of gut evacuation time which affects the feeding pattern of the larvae. The feeding strategy of mud crab larvae is modulated by the length of gut evacuation time. Another factor that can be subject to modulation is the frequency of feeding. This research aimed to evaluate rotifer frequency feeding of early larvae stages of mud crab, Scylla olivacea. This research was conducted at the Mariculture Fisheries Center, Ambon with an indoor system. This research began with carrying out parental maintenance to produce larvae. Larvae are fed with rotifers with different frequencies. The treatments were the frequency of feeding rotifers, namely: Treatment 1 (F1) was the frequency of 1x a day (9:00 am); Treatment 2 (F2) was a frequency of 2x a day (9:00 am & 13:00 pm) and Treatment 3 (F3) was a frequency of 3x a day (9:00am, 13:00pm & 17:00pm). Each treatment was given 3 replications. Based on the results of this study, it showed that feeding with a frequency of three times a day (F3 treatment) was able to have a positive effect on the survival rate of zoea larvae which on the third day was 58% and the fourth day was 22% higher than the F1 and F2 treatments. The growth of larvae showed that F3 treatment was higher than F1 and F2 on the sixth day with an increase in the absolute value of growth of 0.12044 mm compared to F1 of 0.05531 mm and F2 of 0.03253 mm. Keywords: frequency of feeding, growth, larvae, survival rate, mud crab","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47484573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-09DOI: 10.20884/1.oa.2021.17.2.758
Y. Yuliana, S. Subandiyono, S. Hastuti
Tilapia (Oreochromis niloticus) is a freshwater fish commodity in Indonesia. The next problem in aquaculture activities is the low utilization of carbohydrates which causes the role of protein to be reduced. The effort can be done is by adding chromium to feed. Research was conducted on May - July 2019 at Hathcery Fish Center, Siwarak, Central Java. The fish was used for observation have an average weight of 5,97±0,28. The rearing of Tilapia for 42 days using a plastic tub of 1 tail / idensity of 200 fish. The feeding is given twice a day at 08.00 and 16.00 WIB. This trial used an experimental method and a completely randomized design (RAL) with 4 treatments and 5 replications. The treatments were given dose A (2mgCr+3/kg of feed), B (4mgCr+3/kgof feed), C (6mgCr+3/kg of feed) and D (8mgCr+3/kg of feed). Data observed included the level of feed consumption (TKP), feed utilization efficiency (EPP), protein efficiency ratio (PER), protein digestibility, growth rate (RGR) and survival rate. The results showed that chromium had a significant effect (P<0,05) on TKP, EPP, PER, protein digestibility and RGR. Has but no significant effect (P>0,05) on survival. The highgest TKP results in treatment B were 161,66±0,82 g, while the highgest value of EPP PER, protein digestibility, RGR was 34,51±1,25%/day, 1,18±0,04%, 99,89%, 2,15±0,08%. The optimum dose of chromium addition in growth is 3,49 mg/kg. Showed the optimum result during observation.
{"title":"The Effect of Dietary Chromium on Growth and Survival Rate of Tilapia (Oreochromis niloticus)","authors":"Y. Yuliana, S. Subandiyono, S. Hastuti","doi":"10.20884/1.oa.2021.17.2.758","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.758","url":null,"abstract":"Tilapia (Oreochromis niloticus) is a freshwater fish commodity in Indonesia. The next problem in aquaculture activities is the low utilization of carbohydrates which causes the role of protein to be reduced. The effort can be done is by adding chromium to feed. Research was conducted on May - July 2019 at Hathcery Fish Center, Siwarak, Central Java. The fish was used for observation have an average weight of 5,97±0,28. The rearing of Tilapia for 42 days using a plastic tub of 1 tail / idensity of 200 fish. The feeding is given twice a day at 08.00 and 16.00 WIB. This trial used an experimental method and a completely randomized design (RAL) with 4 treatments and 5 replications. The treatments were given dose A (2mgCr+3/kg of feed), B (4mgCr+3/kgof feed), C (6mgCr+3/kg of feed) and D (8mgCr+3/kg of feed). Data observed included the level of feed consumption (TKP), feed utilization efficiency (EPP), protein efficiency ratio (PER), protein digestibility, growth rate (RGR) and survival rate. The results showed that chromium had a significant effect (P<0,05) on TKP, EPP, PER, protein digestibility and RGR. Has but no significant effect (P>0,05) on survival. The highgest TKP results in treatment B were 161,66±0,82 g, while the highgest value of EPP PER, protein digestibility, RGR was 34,51±1,25%/day, 1,18±0,04%, 99,89%, 2,15±0,08%. The optimum dose of chromium addition in growth is 3,49 mg/kg. Showed the optimum result during observation.","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46036217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-28DOI: 10.20884/1.oa.2021.17.2.883
A. Nugraha, S. Almahdi, Aminatul Zahra, I. Karlina
Seagrass transplantation in the large-scale requires a large number of seagrass individu from donor ecosystem. This may give negative impact as damage and reducing the number of seagrass in donor ecosystem. One of methods to overcome this case is by developing transplants using seagrass nut as source for seed. Substrate is one of factors that influence the growth of seagrass. The aim of this study was to compare the effect of differences in substrate composition on morphologi and growth of Enhalus acoroides seeds. Observations were carried out by treatment using mud, sand and mixed substrates sand with mud. The survival rate of Enhalus acoroides seeds was quite high of 100% but it had a lower value of 93.30% on sand substrate. The longest leaf is on the mud substrate with a length of 5.9 cm, the leaf width has the same size in each substrate with a value of 0.4 cm, the highest number of leaves were found in the sand and mixture substrate with 5 strands, the longest root size was in the mixed substrate with a length of 5 cm. The growth of Enhalus acoroides seagrass seeds did not show any significant difference. The highest growth was found in the mud substrate with a value of 0.10 cm/day. Keywords: Enhalus acoroides, seagrass,seed, substrate, transplantation
{"title":"Morphometric Characteristic and Growth Responses of Enhalus acoroides Seedlings Under Different Substrate Composition Treatment","authors":"A. Nugraha, S. Almahdi, Aminatul Zahra, I. Karlina","doi":"10.20884/1.oa.2021.17.2.883","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.883","url":null,"abstract":"Seagrass transplantation in the large-scale requires a large number of seagrass individu from donor ecosystem. This may give negative impact as damage and reducing the number of seagrass in donor ecosystem. One of methods to overcome this case is by developing transplants using seagrass nut as source for seed. Substrate is one of factors that influence the growth of seagrass. The aim of this study was to compare the effect of differences in substrate composition on morphologi and growth of Enhalus acoroides seeds. Observations were carried out by treatment using mud, sand and mixed substrates sand with mud. The survival rate of Enhalus acoroides seeds was quite high of 100% but it had a lower value of 93.30% on sand substrate. The longest leaf is on the mud substrate with a length of 5.9 cm, the leaf width has the same size in each substrate with a value of 0.4 cm, the highest number of leaves were found in the sand and mixture substrate with 5 strands, the longest root size was in the mixed substrate with a length of 5 cm. The growth of Enhalus acoroides seagrass seeds did not show any significant difference. The highest growth was found in the mud substrate with a value of 0.10 cm/day. Keywords: Enhalus acoroides, seagrass,seed, substrate, transplantation","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42605896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-22DOI: 10.20884/1.oa.2021.17.2.817
E. Hilmi, S. Nugroho, E. Sudiana
Mangrove, estuary and lagoon ecosystem can be used as the aquatic organism habitat. These ecosystems also have good suitability to support activity of silvofishery system. Empang parit as a model of silvofishery using the integrating between the conservation activity of mangrove and aquatic ecosystem with increasing of benefit income for fisherman. This research aimed to analyze the model and pattern of empang parit, environment factor of empang parit and benefit cost analysis of empang parit. The research used vegetation analysis, water quality analysis, cash flow analysis, satellite image analysis, and geographical information analysis. The research explained that empang parit required water temperatur between 29 – 32.6oC, water brightnes between 30 – 60 cm, water salinity between 15 -32 ppt, pH between 7 – 81 and dissolve oxygen between 3.9 – 8.3 mg/L.The empang parit also need Bruguiera gymnorrhiza, Heritiera littoralis and Excoecaria agallocha, Rhizophora mucronata and Rhizophora apiculate to cover empang parit system. And empang parit gave postive economic value based on value of NPV between 2.754.703–3.871.542 IDR, IRR between 21–48 and R/C between 2.26–2.32.Keywords : Empang parit; silvofishery system; economic valuation; water quality; mangrove coverage
{"title":"Empang Parit as Silvofishery Model to Support Conserving Mangrove and Increasing Economic Benefit of Social Community","authors":"E. Hilmi, S. Nugroho, E. Sudiana","doi":"10.20884/1.oa.2021.17.2.817","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.817","url":null,"abstract":"Mangrove, estuary and lagoon ecosystem can be used as the aquatic organism habitat. These ecosystems also have good suitability to support activity of silvofishery system. Empang parit as a model of silvofishery using the integrating between the conservation activity of mangrove and aquatic ecosystem with increasing of benefit income for fisherman. This research aimed to analyze the model and pattern of empang parit, environment factor of empang parit and benefit cost analysis of empang parit. The research used vegetation analysis, water quality analysis, cash flow analysis, satellite image analysis, and geographical information analysis. The research explained that empang parit required water temperatur between 29 – 32.6oC, water brightnes between 30 – 60 cm, water salinity between 15 -32 ppt, pH between 7 – 81 and dissolve oxygen between 3.9 – 8.3 mg/L.The empang parit also need Bruguiera gymnorrhiza, Heritiera littoralis and Excoecaria agallocha, Rhizophora mucronata and Rhizophora apiculate to cover empang parit system. And empang parit gave postive economic value based on value of NPV between 2.754.703–3.871.542 IDR, IRR between 21–48 and R/C between 2.26–2.32.Keywords : Empang parit; silvofishery system; economic valuation; water quality; mangrove coverage ","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44881744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.20884/1.oa.2021.17.2.899
Mira Andhika Pierrenia, S. Rejeki, D. Harwanto
Efforts to increase tilapia production are carried out through intensive culture by taking into account various aspects that support fish survival. The culture system that supports intensive culture is the Recirculation Aquaculture System (RAS). The RAS technology has the ability to support aquaculture with very high density and high yields compared to open culture systems. This study aims to determine the effect of different biofilter media in RAS on decreasing TAN concentration and growth of tilapia seeds. The method used was experimental with three treatments and four replications. Tilapia with an average individual weight of 3.40 ± 0.15 g were maintained in RAS with three different biofilter media treatments, sand (A), polystyrene microbeads (B) and kaldnes (C). The parameters observed were pH, DO, temperature, TAN removal efficiency, specific growth rate (SGR) and survival rate (SR). The results showed that different biofilter media had a significant effect (P <0.05) on the TAN removal efficiency value but had no significant effect (P> 0.05) on the SGR and SR values. The sand biofilter treatment (A) gave the best TAN removal efficiency of 36.61±4.82%.Key words: Kaldnes, Polystyrene, Sand, TAN, Tilapia
{"title":"The Effectiveness of Three Biofilter Media on Total Ammonia Nitrogen (TAN) Removal and Survival Rate of Tilapia Gift Seeds (Oreochromis niloticus) in Recirculation Aquaculture System","authors":"Mira Andhika Pierrenia, S. Rejeki, D. Harwanto","doi":"10.20884/1.oa.2021.17.2.899","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.899","url":null,"abstract":"Efforts to increase tilapia production are carried out through intensive culture by taking into account various aspects that support fish survival. The culture system that supports intensive culture is the Recirculation Aquaculture System (RAS). The RAS technology has the ability to support aquaculture with very high density and high yields compared to open culture systems. This study aims to determine the effect of different biofilter media in RAS on decreasing TAN concentration and growth of tilapia seeds. The method used was experimental with three treatments and four replications. Tilapia with an average individual weight of 3.40 ± 0.15 g were maintained in RAS with three different biofilter media treatments, sand (A), polystyrene microbeads (B) and kaldnes (C). The parameters observed were pH, DO, temperature, TAN removal efficiency, specific growth rate (SGR) and survival rate (SR). The results showed that different biofilter media had a significant effect (P <0.05) on the TAN removal efficiency value but had no significant effect (P> 0.05) on the SGR and SR values. The sand biofilter treatment (A) gave the best TAN removal efficiency of 36.61±4.82%.Key words: Kaldnes, Polystyrene, Sand, TAN, Tilapia","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46476106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.20884/1.oa.2021.17.1.903
C. Y. Manullang, W. Barends, Dominggus Polnaya, A. Soamole, I. Rehalat
The coastal is frequently impacted by marine litter that damages marine wildlife and causes economic loss to fishing and maritime industries. In this study, we described the quantity of marine litter in the inner and outer of Ambon Bay. The Sampling was carried out in September 2017. The beach litter sampling was handled by the line transect method combined with the quadrant method in 8 sites; the observation of floating litter was conducted manually with boat sampling and visual observation in a seven-line trajectory. About 2359 items of coastal litter were found in seven sites in Ambon Bay with a mean density of 18.87 items.m -2. These beach litter belonging to five categories were counted (plastic, glass, metal, cloth, paper). The highest abundance of beach litter was found in the inner Ambon Bay with a mean density of 68.74 items per m2. Plastic was the most abundant beach litter observed. Based on Clean Coast Index (CCI) evaluation, all coastal sites in Ambon Bay were identified as Very Dirty, that is most of the coastal is covered with litter. The highest floating litter was found near the market. The abundance and distribution of litter through Ambon Bay seem to be influenced by the local human population, anthropogenic activities, and seawater circulation in inner and outer Ambon Bay.
{"title":"Marine Litter and Grading of the Coastal Areas of Ambon Bay, Indonesia","authors":"C. Y. Manullang, W. Barends, Dominggus Polnaya, A. Soamole, I. Rehalat","doi":"10.20884/1.oa.2021.17.1.903","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.1.903","url":null,"abstract":"The coastal is frequently impacted by marine litter that damages marine wildlife and causes economic loss to fishing and maritime industries. In this study, we described the quantity of marine litter in the inner and outer of Ambon Bay. The Sampling was carried out in September 2017. The beach litter sampling was handled by the line transect method combined with the quadrant method in 8 sites; the observation of floating litter was conducted manually with boat sampling and visual observation in a seven-line trajectory. About 2359 items of coastal litter were found in seven sites in Ambon Bay with a mean density of 18.87 items.m -2. These beach litter belonging to five categories were counted (plastic, glass, metal, cloth, paper). The highest abundance of beach litter was found in the inner Ambon Bay with a mean density of 68.74 items per m2. Plastic was the most abundant beach litter observed. Based on Clean Coast Index (CCI) evaluation, all coastal sites in Ambon Bay were identified as Very Dirty, that is most of the coastal is covered with litter. The highest floating litter was found near the market. The abundance and distribution of litter through Ambon Bay seem to be influenced by the local human population, anthropogenic activities, and seawater circulation in inner and outer Ambon Bay.","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44057725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.20884/1.oa.2021.17.2.913
H. Rifai, F. Zulpikar, M. Safaat, J. Renyaan, L. Alifatri, A. Rasyidin
Seagrass meadows in oligotrophic environments are particularly susceptible to nutrient enrichment, yet morphological and architectural seagrass root responses in these ecosystems are poorly understood. This study aimed to investigate the response of Amphibolis antarctica, one of dominant seagrass species in Shark Bay, roots to nutrient additions along a salinity gradient in the oligotrophic ecosystem of Shark Bay, Western Australia. A fully factorial nutrient additional experiment with four treatments (Control, N, P and N+P) was conducted at each of five sites along a salinity gradient (between ~38ppt in site 1 and ~50ppt in site 5) in Shark Bay across a three-year period (2012-2015). In the laboratory, the roots morphology and architecture A. antarctica were investigated using a software (WinRhizo). Then, a two-way analysis of variance (ANOVA) was performed to investigate if there was a significant change in the morphology and architecture of the roots after the nutrient inputs and along five sites with salinity gradient. There was no significant impact of nutrient addition on the root’s morphology and architecture of A. antarctica species. However, the effect of site factor with salinity gradient was significant to all morphological aspects (total root length, root surface area and root diameter) of A. antarctica roots. These findings highlight the more ecological function of A. antarctica roots being in anchoring of the plant into the seafloor rather than to absorb nutrient from the sediment.Keywords: Nutrient addition, Oligotrophic habitats, Amphibolis antarctica, Shark Bay
{"title":"Responses of Seagrass Amphibolis antarctica Roots to Nutrient Additions Along a Salinity Gradient in Shark Bay, Western Australia","authors":"H. Rifai, F. Zulpikar, M. Safaat, J. Renyaan, L. Alifatri, A. Rasyidin","doi":"10.20884/1.oa.2021.17.2.913","DOIUrl":"https://doi.org/10.20884/1.oa.2021.17.2.913","url":null,"abstract":"Seagrass meadows in oligotrophic environments are particularly susceptible to nutrient enrichment, yet morphological and architectural seagrass root responses in these ecosystems are poorly understood. This study aimed to investigate the response of Amphibolis antarctica, one of dominant seagrass species in Shark Bay, roots to nutrient additions along a salinity gradient in the oligotrophic ecosystem of Shark Bay, Western Australia. A fully factorial nutrient additional experiment with four treatments (Control, N, P and N+P) was conducted at each of five sites along a salinity gradient (between ~38ppt in site 1 and ~50ppt in site 5) in Shark Bay across a three-year period (2012-2015). In the laboratory, the roots morphology and architecture A. antarctica were investigated using a software (WinRhizo). Then, a two-way analysis of variance (ANOVA) was performed to investigate if there was a significant change in the morphology and architecture of the roots after the nutrient inputs and along five sites with salinity gradient. There was no significant impact of nutrient addition on the root’s morphology and architecture of A. antarctica species. However, the effect of site factor with salinity gradient was significant to all morphological aspects (total root length, root surface area and root diameter) of A. antarctica roots. These findings highlight the more ecological function of A. antarctica roots being in anchoring of the plant into the seafloor rather than to absorb nutrient from the sediment.Keywords: Nutrient addition, Oligotrophic habitats, Amphibolis antarctica, Shark Bay","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44063218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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