Pub Date : 2024-08-09DOI: 10.9734/ajfar/2024/v26i8797
Muhammad Khofi Istakhfi Tafdrian, U. Subhan, Yuniar Mulyani, Iskandar
Biofloc is a fish cultivation system that relies on a collection of microorganisms, such as bacteria, protozoa, and microalgae, that live in the form of flocs or clumps. This study aims to determine the effect of varying silica concentrations on plankton abundance and diversity index in biofloc systems. Conducted from February to March 2024, the research employed a Completely Randomized Design (CRD) method with four treatments (0 ppm, 15 ppm, 20 ppm, and 25 ppm) and three replications each. The parameters observed were phytoplankton abundance, zooplankton abundance, and diversity index. Observation of plankton abundance using a 10 x 10 magnification microscope using SRC (Sedgewick Rafter-counting Cell) with a volume of 1 ml and diversity index using the Shannon Wierner method. The results of this research are that the addition of a silica concentration of 15 ppm is the best concentration with a phytoplankton abundance value of 450,729 cells/L, a zooplankton abundance of 827,778 cells/L and a diversity index of 2,662.
{"title":"Optimizing Plankton Growth and Diversity in Biofloc Systems through Silica Supplementation","authors":"Muhammad Khofi Istakhfi Tafdrian, U. Subhan, Yuniar Mulyani, Iskandar","doi":"10.9734/ajfar/2024/v26i8797","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i8797","url":null,"abstract":"Biofloc is a fish cultivation system that relies on a collection of microorganisms, such as bacteria, protozoa, and microalgae, that live in the form of flocs or clumps. This study aims to determine the effect of varying silica concentrations on plankton abundance and diversity index in biofloc systems. Conducted from February to March 2024, the research employed a Completely Randomized Design (CRD) method with four treatments (0 ppm, 15 ppm, 20 ppm, and 25 ppm) and three replications each. The parameters observed were phytoplankton abundance, zooplankton abundance, and diversity index. Observation of plankton abundance using a 10 x 10 magnification microscope using SRC (Sedgewick Rafter-counting Cell) with a volume of 1 ml and diversity index using the Shannon Wierner method. The results of this research are that the addition of a silica concentration of 15 ppm is the best concentration with a phytoplankton abundance value of 450,729 cells/L, a zooplankton abundance of 827,778 cells/L and a diversity index of 2,662.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"39 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924422","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 : 2024-08-09DOI: 10.9734/ajfar/2024/v26i8796
Nia Isnaini, Zahidah, H. Herawati
T. chuii is a species of phytoplankton that has a high nutritional content, namely 70,287% protein, 0,795% lipid and 2.180% carbohydrate. The objective of this study was to determine the best concentration of urea fertilizer on the density of T. chuii cells on a laboratory scale. The research method used in this research was Completely Randomized Design (CRD) consisting of 4 treatments with 4 replications. The treatments in this study consisted of treatment A, namely KW21 fertilizer 1 ml/L (control), treatments B, C and D using Urea fertilizer 30 mg/L, 45 mg/L, 60 mg/L with a concentration of ZA 40 mg/L and TSP 5 mg/L. the observations were conducted for 24 hours. Parameters observed included population density of T. chuii, growth rate, generation time and air quality. The findings of the study showed that treatment D gave the best results with a population density of 232,75 x 104 cells/ml, a growth rate of 0.31 cells/ml/day and the fastest generation time of 15,41 hours.
{"title":"Effectiveness of Urea Fertilizer with Different Concentrations on T. chuii Culture on Laboratory Conditions","authors":"Nia Isnaini, Zahidah, H. Herawati","doi":"10.9734/ajfar/2024/v26i8796","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i8796","url":null,"abstract":"T. chuii is a species of phytoplankton that has a high nutritional content, namely 70,287% protein, 0,795% lipid and 2.180% carbohydrate. The objective of this study was to determine the best concentration of urea fertilizer on the density of T. chuii cells on a laboratory scale. The research method used in this research was Completely Randomized Design (CRD) consisting of 4 treatments with 4 replications. The treatments in this study consisted of treatment A, namely KW21 fertilizer 1 ml/L (control), treatments B, C and D using Urea fertilizer 30 mg/L, 45 mg/L, 60 mg/L with a concentration of ZA 40 mg/L and TSP 5 mg/L. the observations were conducted for 24 hours. Parameters observed included population density of T. chuii, growth rate, generation time and air quality. The findings of the study showed that treatment D gave the best results with a population density of 232,75 x 104 cells/ml, a growth rate of 0.31 cells/ml/day and the fastest generation time of 15,41 hours.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"48 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922983","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 : 2024-08-09DOI: 10.9734/ajfar/2024/v26i8795
Syafira Anjani Bahtiar, Muhammad Junaidi, N. Diniarti
Snubnose Pompano (Trachinotus blochii) is a species that is still relatively new to be cultivated in Indonesia but has great potential to be developed because it has high nutritional content. However, in cultivation activities, expensive feed and low dietary quality are obstacles that cultivators often complain about. The solution to high feed prices is that additional ingredients (addictive feed) are needed that can increase the growth and survival of fish, there by reducing production costs and providing alternative feed other than just trash fish. Additional ingredients known on the market are Effective Microorganism-4 (EM4) probiotics. So this research aims to analyze further the effect of adding the probiotic Effective Microorganism-4 (EM4) at different doses on growth, feed efficiency levels, and survival of Snubnose Pompano (Trachinotus blochii) seeds. Based on the results of the research carried out, it can be concluded that the addition of EM4 to moist pellets has an influence on the absolute length growth of the Snubnose Pompano (Trachinotus blochii) which is the best in the 80% treatment (P4) which is not significantly different from the 70% treatment (P3), however substantially different from the Control (P0), 50% (P1), and 60% (P2) treatments. Based on the results of the research carried out, it can be concluded that the addition of EM4 to moist pellets has an influence on the growth in absolute length, absolute weight, specific growth rate, survival rate, FCR and feed efficiency of the best Snubnose Pompano (Trachinotus blochii), namely at 80% treatment.
{"title":"The Effect of Adding Em4 to Moist Pellets on the Growth and Survival of Snubnose Pompano (Trachinotus blochii)","authors":"Syafira Anjani Bahtiar, Muhammad Junaidi, N. Diniarti","doi":"10.9734/ajfar/2024/v26i8795","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i8795","url":null,"abstract":"Snubnose Pompano (Trachinotus blochii) is a species that is still relatively new to be cultivated in Indonesia but has great potential to be developed because it has high nutritional content. However, in cultivation activities, expensive feed and low dietary quality are obstacles that cultivators often complain about. The solution to high feed prices is that additional ingredients (addictive feed) are needed that can increase the growth and survival of fish, there by reducing production costs and providing alternative feed other than just trash fish. Additional ingredients known on the market are Effective Microorganism-4 (EM4) probiotics. So this research aims to analyze further the effect of adding the probiotic Effective Microorganism-4 (EM4) at different doses on growth, feed efficiency levels, and survival of Snubnose Pompano (Trachinotus blochii) seeds. Based on the results of the research carried out, it can be concluded that the addition of EM4 to moist pellets has an influence on the absolute length growth of the Snubnose Pompano (Trachinotus blochii) which is the best in the 80% treatment (P4) which is not significantly different from the 70% treatment (P3), however substantially different from the Control (P0), 50% (P1), and 60% (P2) treatments. Based on the results of the research carried out, it can be concluded that the addition of EM4 to moist pellets has an influence on the growth in absolute length, absolute weight, specific growth rate, survival rate, FCR and feed efficiency of the best Snubnose Pompano (Trachinotus blochii), namely at 80% treatment.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"7 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921726","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 : 2024-06-11DOI: 10.9734/ajfar/2024/v26i6776
George, U. U., Essien-Ibok, M. A.
The research aimed to assess the acute toxicity of urea fertilizer on juveniles of Oreochromis niloticus. The findings indicated a correlation between increasing concentrations of urea fertilizer and higher mortality rates among the test organisms, with an LC50 value determined at 500 mg/l. Additionally, a rise in total dissolved solids was observed with higher concentrations of urea. Parameters such as temperature, electrical conductivity, dissolved oxygen and pH showed statistically significant (P < 0.05) changes as the concentrations of urea increases. Behavioural responses during the exposure phase included heightened excitability, vigorous swimming behaviours, loss of equilibrium, culminating in mortality. These results unequivocally demonstrate that urea fertilizer at acute concentrations poses significant toxic risks to juvenile Oreochromis niloticus.
{"title":"Investigating the Acute Toxic Effects of Urea Fertilizer on Juvenile Nile Tilapia (Oreochromis niloticus)","authors":"George, U. U., Essien-Ibok, M. A.","doi":"10.9734/ajfar/2024/v26i6776","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6776","url":null,"abstract":"The research aimed to assess the acute toxicity of urea fertilizer on juveniles of Oreochromis niloticus. The findings indicated a correlation between increasing concentrations of urea fertilizer and higher mortality rates among the test organisms, with an LC50 value determined at 500 mg/l. Additionally, a rise in total dissolved solids was observed with higher concentrations of urea. Parameters such as temperature, electrical conductivity, dissolved oxygen and pH showed statistically significant (P < 0.05) changes as the concentrations of urea increases. Behavioural responses during the exposure phase included heightened excitability, vigorous swimming behaviours, loss of equilibrium, culminating in mortality. These results unequivocally demonstrate that urea fertilizer at acute concentrations poses significant toxic risks to juvenile Oreochromis niloticus.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"19 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356636","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 : 2024-06-11DOI: 10.9734/ajfar/2024/v26i6775
Md. Mazedul Haque Sachchu, Amir Hossain, Md. Mahmudul Kobir, Md. Durul Hoda, Md. Raju Ahamed, Miss Nushrat Jahan Lima, Tanjina Nasrin Eva, Md. Ashraful Alam
Bangladesh a nation with a high population density, gets all of the protein it needs from river fishes. The observation is very alarming that heavy metals polluted the major river water by the growing garment washing, dyeing and textile, fertilizer, cement, tannery, metal, electrochemical and pharmaceutical industries were the main culprits that don’t have proper effective effluent treatment plants (ETP). High-value heavy metals in industrial area river fish as chromium (Cr) 164.73 mg/kg in Heteropneustes fossilis (stinging catfish) at Buriganga River, Hazaribagh, zinc (Zn) 309.47 mg/kg in Mastacembelus armatus (Bain) fish at Bangshi river, Savar, copper (Cu) 26.33 mg/kg in Mastacembelus armatus (Bain) at Bangshi river, Savar, arsenic (As) 5.64 mg/kg in Heteropneustes fossilis (stinging catfish) at Bangshi river, Savar, lead (Pb) 18.16 mg/kg in Channa punctatus (Taki) at Buriganga river, Hazaribagh and cadmium (Cd) 2.03 mg/kg in Heteropneustes fossilis (stinging catfish) at Buriganga river, Hazaribagh were observed. The two rivers are identified as most contaminated by heavy metals one is the Bangshi River, Savar, Gazipur and another one Buriganga River, Hazaribagh. The main reason for the contamination of these two rivers was uncontrolled industrialization around Dhaka and in Hazaribagh, a huge number of tanneries have grown that use a huge quantity of Cr creating a threat to the ecosystem and even a serious health risk for humans. Heavy metals that fish consume are contaminating river water ecosystems. This contamination spreads to human bodies and is the cause of many serious ailments.
{"title":"Heavy Metal Intake by Fishes of Different River Locations in Bangladesh: A Comparative Statistical Review","authors":"Md. Mazedul Haque Sachchu, Amir Hossain, Md. Mahmudul Kobir, Md. Durul Hoda, Md. Raju Ahamed, Miss Nushrat Jahan Lima, Tanjina Nasrin Eva, Md. Ashraful Alam","doi":"10.9734/ajfar/2024/v26i6775","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6775","url":null,"abstract":"Bangladesh a nation with a high population density, gets all of the protein it needs from river fishes. The observation is very alarming that heavy metals polluted the major river water by the growing garment washing, dyeing and textile, fertilizer, cement, tannery, metal, electrochemical and pharmaceutical industries were the main culprits that don’t have proper effective effluent treatment plants (ETP). High-value heavy metals in industrial area river fish as chromium (Cr) 164.73 mg/kg in Heteropneustes fossilis (stinging catfish) at Buriganga River, Hazaribagh, zinc (Zn) 309.47 mg/kg in Mastacembelus armatus (Bain) fish at Bangshi river, Savar, copper (Cu) 26.33 mg/kg in Mastacembelus armatus (Bain) at Bangshi river, Savar, arsenic (As) 5.64 mg/kg in Heteropneustes fossilis (stinging catfish) at Bangshi river, Savar, lead (Pb) 18.16 mg/kg in Channa punctatus (Taki) at Buriganga river, Hazaribagh and cadmium (Cd) 2.03 mg/kg in Heteropneustes fossilis (stinging catfish) at Buriganga river, Hazaribagh were observed. The two rivers are identified as most contaminated by heavy metals one is the Bangshi River, Savar, Gazipur and another one Buriganga River, Hazaribagh. The main reason for the contamination of these two rivers was uncontrolled industrialization around Dhaka and in Hazaribagh, a huge number of tanneries have grown that use a huge quantity of Cr creating a threat to the ecosystem and even a serious health risk for humans. Heavy metals that fish consume are contaminating river water ecosystems. This contamination spreads to human bodies and is the cause of many serious ailments.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"5 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356884","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 : 2024-06-10DOI: 10.9734/ajfar/2024/v26i6773
O. A. J., Udoh J. P., Okoko A. C.
Aims: To investigate the fecundity and egg quality of C. gariepinus broodstock raised at 0.50 m, 0.75 m and 1.0 m pond water depth. Study Design: Treatments were assigned using complete randomized design. Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria. Methodology: Nine female broodstock of C. gariepinus averaging 2.51 – 2.53 kg and 64.30 – 67.24 cm were raised for six months at 0.50 m, 0.75 m and 1.0 m pond water depth; referred to as treatments A, B and C, respectively Experimental fish were fed 42% crude protein commercial feed. The fecundity, relative fecundity, gonadosomatic index (GSI), egg weight and size were assessed. Results: The results revealed that the egg quality significantly (P=.00) increased with the water depth of the broodstock culture tank. Egg weight and GSI values from treatment C (363.40±0.57 g and 14.40±0.01 %, respectively) were significantly (P = .007) higher than those of treatment A (267.30±0.06 g and 10.66± 0.06 %, respectively) but showed no significant difference with those of Treatment B (331.07±1.20; 13.09±0.04 %). The corresponding egg diameter (1.01±00; 1.08±0.03 and 1.21± 0.01g), fecundity and relative fecundity of broodstock also increased with pond water depth (P = .003): 182,120.0±503.67, 72.66±0.40 > 185,618.3± 745.98, 73.37±0.18 > 188, 967.1± 295.19, 74.89±0.18, respectively. Conclusion: The water depth of the broodstock maintenance pond enhances fecundity and egg quality; it is better at 1.0 m depth for successful fry production. Broodstock may be maintained at lower pond water depths for growth purposes; prior to breeding.
{"title":"Egg Quality and Fecundity of Clarias gariepinus Broodstock Cultured at Different Water Depths in Indoor Concrete Tanks","authors":"O. A. J., Udoh J. P., Okoko A. C.","doi":"10.9734/ajfar/2024/v26i6773","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6773","url":null,"abstract":"Aims: To investigate the fecundity and egg quality of C. gariepinus broodstock raised at 0.50 m, 0.75 m and 1.0 m pond water depth. \u0000Study Design: Treatments were assigned using complete randomized design. \u0000Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria. \u0000Methodology: Nine female broodstock of C. gariepinus averaging 2.51 – 2.53 kg and 64.30 – 67.24 cm were raised for six months at 0.50 m, 0.75 m and 1.0 m pond water depth; referred to as treatments A, B and C, respectively Experimental fish were fed 42% crude protein commercial feed. The fecundity, relative fecundity, gonadosomatic index (GSI), egg weight and size were assessed. \u0000Results: The results revealed that the egg quality significantly (P=.00) increased with the water depth of the broodstock culture tank. Egg weight and GSI values from treatment C (363.40±0.57 g and 14.40±0.01 %, respectively) were significantly (P = .007) higher than those of treatment A (267.30±0.06 g and 10.66± 0.06 %, respectively) but showed no significant difference with those of Treatment B (331.07±1.20; 13.09±0.04 %). The corresponding egg diameter (1.01±00; 1.08±0.03 and 1.21± 0.01g), fecundity and relative fecundity of broodstock also increased with pond water depth (P = .003): 182,120.0±503.67, 72.66±0.40 > 185,618.3± 745.98, 73.37±0.18 > 188, 967.1± 295.19, 74.89±0.18, respectively. \u0000Conclusion: The water depth of the broodstock maintenance pond enhances fecundity and egg quality; it is better at 1.0 m depth for successful fry production. Broodstock may be maintained at lower pond water depths for growth purposes; prior to breeding.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"111 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361163","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 : 2024-06-10DOI: 10.9734/ajfar/2024/v26i6774
O. A. J.
Aims: To determine the optimum water depth required for catfish spawning in hatcheries. Study Design: Treatments were assigned using complete randomized design. Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria. Methodology: Eighteen (18) similarly-sized H. longifilis broodstock (2.51-2.53 kg, 64 – 66 cm): comprising six broodstock of three males and three females, were held for six months at 0.50 m, 0.75 m and 1.0 m pond water depth. All males were sacrificed for milt extraction without hormonal inducement; with milt from each treatment diluted with normal saline solution. Female broodstock from each treatment were separately induced with ovaprim hormones at a single dosage of 0.5ml/kg body weight of fish and allowed for 16 hours before manual stripping; 3g of egg from each broodstock and mixed with the diluted milt and activated with 100 ml of normal saline. The fertilized eggs were incubated and thereafter assessed for percentage fertilization, hatchability, survival and fry production success. Results: broodstock reproductive parameters significantly increased (P = 0.00) with water depth of broodstock culture tank. Percentage fertilizations were: 49.50±0.78, 68.17±0.93, and 82.50±1.44; respectively. Percentage hatchability of broodstock eggs were: 91.37±1.65 significantly higher for 1.0 m water depth group than 67.79±4.58 from 0.75 m water depth treatment while the least value of hatchability 50.31± 0.78 was recorded for broodstock raised at 0.50 m water depth. The fish group raised at 1.0 m water depth also exhibited highest percentage survival value of 97.02 ± 1.09 and fry production success value of 73.08 ± 0.53 while broodstock raised at 0.50 m water depth indicated the least values: % survival, 8.38 ± 0.48 and fry production success of 2.07 ± 0.07. Conclusion: In times or places of water scarcity, H. longifilis broodstock may be raised at pond water of 0.5 m to 1.0 m. But the water depth that would afford the best breeding and reproductive performance is at 1.0 m depth.
{"title":"Influence of Tank Water Depths on Reproductive Performance of Catfish (Heterobranchus longifilis) Valenciennes, 1840","authors":"O. A. J.","doi":"10.9734/ajfar/2024/v26i6774","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6774","url":null,"abstract":"Aims: To determine the optimum water depth required for catfish spawning in hatcheries. \u0000Study Design: Treatments were assigned using complete randomized design. \u0000Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria. \u0000Methodology: Eighteen (18) similarly-sized H. longifilis broodstock (2.51-2.53 kg, 64 – 66 cm): comprising six broodstock of three males and three females, were held for six months at 0.50 m, 0.75 m and 1.0 m pond water depth. All males were sacrificed for milt extraction without hormonal inducement; with milt from each treatment diluted with normal saline solution. Female broodstock from each treatment were separately induced with ovaprim hormones at a single dosage of 0.5ml/kg body weight of fish and allowed for 16 hours before manual stripping; 3g of egg from each broodstock and mixed with the diluted milt and activated with 100 ml of normal saline. The fertilized eggs were incubated and thereafter assessed for percentage fertilization, hatchability, survival and fry production success. \u0000Results: broodstock reproductive parameters significantly increased (P = 0.00) with water depth of broodstock culture tank. Percentage fertilizations were: 49.50±0.78, 68.17±0.93, and 82.50±1.44; respectively. Percentage hatchability of broodstock eggs were: 91.37±1.65 significantly higher for 1.0 m water depth group than 67.79±4.58 from 0.75 m water depth treatment while the least value of hatchability 50.31± 0.78 was recorded for broodstock raised at 0.50 m water depth. The fish group raised at 1.0 m water depth also exhibited highest percentage survival value of 97.02 ± 1.09 and fry production success value of 73.08 ± 0.53 while broodstock raised at 0.50 m water depth indicated the least values: % survival, 8.38 ± 0.48 and fry production success of 2.07 ± 0.07. Conclusion: In times or places of water scarcity, H. longifilis broodstock may be raised at pond water of 0.5 m to 1.0 m. But the water depth that would afford the best breeding and reproductive performance is at 1.0 m depth.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365869","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 : 2024-06-05DOI: 10.9734/ajfar/2024/v26i6771
J. Rayos, Niko A. Macaraeg
The Philippines' economy depends heavily on the profitability of the tilapia aquaculture industry. The country's tilapia aquaculture still has a significant amount of untapped biophysical growth potential; therefore, more rapid expansion is needed to keep up with the increasing demand for fish. The study examined the variables affecting the technical efficiency of tilapia production in the Philippines. The face-to-face interview method was used to survey randomly selected tilapia farms. The efficiency of the Philippines' tilapia aquaculture was estimated in this study. Overall, the findings of the technical efficiency analysis indicated that all fish producers within the examined regions were functioning below the production frontier. Therefore, to boost productivity and efficiency, it is necessary to thoroughly study the origins of inefficiencies in socioeconomic variables and farm features. The mean technical efficiency, as determined by the maximum likelihood estimation of the stochastic production frontier, is 0.44. The model's outcome showed that area and stocking rate significantly impact tilapia output in a few selected Philippine locales. It was discovered that factors such as the utilization of aeration, adoption of advanced culture method, and access to government support are significant predictors of technical efficiency in tilapia farming. The policy implication is that there are still more opportunities to raise the current level of technical efficiency of tilapia production in the Philippines.
{"title":"Determinants of Production and Technical Efficiency of Tilapia Farming in the Philippines","authors":"J. Rayos, Niko A. Macaraeg","doi":"10.9734/ajfar/2024/v26i6771","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6771","url":null,"abstract":"The Philippines' economy depends heavily on the profitability of the tilapia aquaculture industry. The country's tilapia aquaculture still has a significant amount of untapped biophysical growth potential; therefore, more rapid expansion is needed to keep up with the increasing demand for fish. The study examined the variables affecting the technical efficiency of tilapia production in the Philippines. The face-to-face interview method was used to survey randomly selected tilapia farms. The efficiency of the Philippines' tilapia aquaculture was estimated in this study. Overall, the findings of the technical efficiency analysis indicated that all fish producers within the examined regions were functioning below the production frontier. Therefore, to boost productivity and efficiency, it is necessary to thoroughly study the origins of inefficiencies in socioeconomic variables and farm features. The mean technical efficiency, as determined by the maximum likelihood estimation of the stochastic production frontier, is 0.44. The model's outcome showed that area and stocking rate significantly impact tilapia output in a few selected Philippine locales. It was discovered that factors such as the utilization of aeration, adoption of advanced culture method, and access to government support are significant predictors of technical efficiency in tilapia farming. The policy implication is that there are still more opportunities to raise the current level of technical efficiency of tilapia production in the Philippines.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"317 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141386511","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 : 2024-06-05DOI: 10.9734/ajfar/2024/v26i6772
Wayan Kantun, Nursidi Latief
Intensive exploitation of vermiculated spinefoot in the Makassar Strait suggests a potential shift in population dynamics. This study aims to examine various biological aspects of the species, such as size distribution, growth patterns, condition factors, sex ratio, gonad maturity, and the size at first gonad maturity. Conducted through a survey method in the waters of the Makassar Strait, the research utilized tickle net fishing gear continuously operated in the area. Findings revealed that male fish had an average length distribution of 18.3 ± 0.325 cm, while female fish measured 19.8 ± 0.496 cm. Both genders exhibited negative allometric growth patterns. The condition factor was 0.999 ± 0.004 for males and 1.001 ± 0.005 for females. The sex ratio appeared unbalanced, with gonad maturity stages ranging from immature to spawning. The size at which males first matured gonads was 21.587 cm, while for females, it was 19.229 cm, indicating faster gonad maturation in females. To ensure sustainability, fishing efforts should target individuals above the size at which gonads first mature.
{"title":"Population Structure of Vermiculated Spinefoot (Siganus vermiculatus Valenciennes, 1835) in the Waters of Makassar Strait, Indonesia","authors":"Wayan Kantun, Nursidi Latief","doi":"10.9734/ajfar/2024/v26i6772","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i6772","url":null,"abstract":"Intensive exploitation of vermiculated spinefoot in the Makassar Strait suggests a potential shift in population dynamics. This study aims to examine various biological aspects of the species, such as size distribution, growth patterns, condition factors, sex ratio, gonad maturity, and the size at first gonad maturity. Conducted through a survey method in the waters of the Makassar Strait, the research utilized tickle net fishing gear continuously operated in the area. Findings revealed that male fish had an average length distribution of 18.3 ± 0.325 cm, while female fish measured 19.8 ± 0.496 cm. Both genders exhibited negative allometric growth patterns. The condition factor was 0.999 ± 0.004 for males and 1.001 ± 0.005 for females. The sex ratio appeared unbalanced, with gonad maturity stages ranging from immature to spawning. The size at which males first matured gonads was 21.587 cm, while for females, it was 19.229 cm, indicating faster gonad maturation in females. To ensure sustainability, fishing efforts should target individuals above the size at which gonads first mature.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"50 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141384137","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 : 2024-06-02DOI: 10.9734/ajfar/2024/v26i5770
M. Zamanpoore, Fatemeh Abbaspour
In this study, we explore Dehram river system, focusing on its biological characteristics, in a hot arid region. This is a freshwater stream flowing over salt formations. We examined various ecological aspects of the river, including its benthic macroinvertebrates, zooplankton, fishes, as well as some physical and chemical factors in three selected stations. The river showed variations in physical and chemical properties, with salinity and conductivity levels being the most significant. Salinity, total dissolved solids, calcium ion concentration, and nitrate levels increased downstream in the study area. Our findings revealed 13 macroinvertebrate orders present in the river, including a new record for Fars Province - the hydrobiid gastropod Ecrobia grimmi. The discovery of the four fish species in the river marked a new addition to their known geographical distribution. Certain invertebrate families were unique to station 1 and/or 2, while families Dyticidae and Simuliidae were exclusive to station 3. Other families were found in all three stations. Fish groups in the river included four identified cyprinid species, revealing new distribution ranges for them. Capoeta barroisi, known for tolerating specific environmental conditions, was found to adapt to the higher temperature, EC, and pH ranges in the river, setting new ecological records. The river exhibited unique ecological conditions such as high temperature and extranormal conductivity levels, which may have led to specific adaptations in its biota. We recommend further detailed investigations to determine whether these are new species or highly adapted populations isolated geographically and physiologically.
{"title":"A Foundational Study of the Dehram River’s Aquatic Ecosystem: Bridging Fresh and Brackish Water","authors":"M. Zamanpoore, Fatemeh Abbaspour","doi":"10.9734/ajfar/2024/v26i5770","DOIUrl":"https://doi.org/10.9734/ajfar/2024/v26i5770","url":null,"abstract":"In this study, we explore Dehram river system, focusing on its biological characteristics, in a hot arid region. This is a freshwater stream flowing over salt formations. We examined various ecological aspects of the river, including its benthic macroinvertebrates, zooplankton, fishes, as well as some physical and chemical factors in three selected stations. The river showed variations in physical and chemical properties, with salinity and conductivity levels being the most significant. Salinity, total dissolved solids, calcium ion concentration, and nitrate levels increased downstream in the study area. Our findings revealed 13 macroinvertebrate orders present in the river, including a new record for Fars Province - the hydrobiid gastropod Ecrobia grimmi. The discovery of the four fish species in the river marked a new addition to their known geographical distribution. Certain invertebrate families were unique to station 1 and/or 2, while families Dyticidae and Simuliidae were exclusive to station 3. Other families were found in all three stations. Fish groups in the river included four identified cyprinid species, revealing new distribution ranges for them. Capoeta barroisi, known for tolerating specific environmental conditions, was found to adapt to the higher temperature, EC, and pH ranges in the river, setting new ecological records. The river exhibited unique ecological conditions such as high temperature and extranormal conductivity levels, which may have led to specific adaptations in its biota. We recommend further detailed investigations to determine whether these are new species or highly adapted populations isolated geographically and physiologically.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"46 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141274080","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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