Pub Date : 2023-08-04DOI: 10.9734/ajfar/2023/v24i2627
R. Mukherjee, J. Maity
Aims: To study the diversity of Ornamental fishes as native species by origin from certain parts of Southern Bengal, have importance in export world of ornamental trading in and across India along with their status in natural habitats. Study Design: An intricate survey was performed along with formal-informal interviews Place and Duration of Study: Survey sites included Howrah, North 24 Paraganas and South 24 Paraganas, Fish Markets, Pet Markets, and Several Fish Farms. Methodology: Live specimens after collecting from natural water bodies like ponds, canals, rivers with the help of fishing nets and gears, are immediately preserved in 5% formalin. Later identification and further investigations are completed in the laboratory. Results: 70 native species from 9 orders were enlisted to for their potentiality but few are exporting from Kolkata market and have gained popularity. 23 indigenous varieties are regularly exporting from Southern Bengal. Some of those species can be kept commercially in aquarium without hurting their biology. Conclusion: This entire practice of export and domestic supply rely upon mostly wild capture which is unorganised and sometimes unauthorised, ultimately impacts on declination of population and downward indication of biodiversity. Additionally, environmental issues and also anthropogenic activities such as habitat destruction, fragmentation, alteration of water quality due to water pollution, agri-based effluents etc. confirm their loss in nature. Finally, this study recommends that appropriate managements on breeding and culture, quality feed development, consciousness about the species, awareness on the role of species in ecological terms, proper training can only forbid these native wealth from extinction in near future.
{"title":"The Study of Freshwater Indigenous Ornamental Fishes Available in Selected Sites of Southern Bengal and Their Present Status in Natural Habitats","authors":"R. Mukherjee, J. Maity","doi":"10.9734/ajfar/2023/v24i2627","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i2627","url":null,"abstract":"Aims: To study the diversity of Ornamental fishes as native species by origin from certain parts of Southern Bengal, have importance in export world of ornamental trading in and across India along with their status in natural habitats. \u0000Study Design: An intricate survey was performed along with formal-informal interviews \u0000Place and Duration of Study: Survey sites included Howrah, North 24 Paraganas and South 24 Paraganas, Fish Markets, Pet Markets, and Several Fish Farms. \u0000Methodology: Live specimens after collecting from natural water bodies like ponds, canals, rivers with the help of fishing nets and gears, are immediately preserved in 5% formalin. Later identification and further investigations are completed in the laboratory. \u0000Results: 70 native species from 9 orders were enlisted to for their potentiality but few are exporting from Kolkata market and have gained popularity. 23 indigenous varieties are regularly exporting from Southern Bengal. Some of those species can be kept commercially in aquarium without hurting their biology. \u0000Conclusion: This entire practice of export and domestic supply rely upon mostly wild capture which is unorganised and sometimes unauthorised, ultimately impacts on declination of population and downward indication of biodiversity. Additionally, environmental issues and also anthropogenic activities such as habitat destruction, fragmentation, alteration of water quality due to water pollution, agri-based effluents etc. confirm their loss in nature. Finally, this study recommends that appropriate managements on breeding and culture, quality feed development, consciousness about the species, awareness on the role of species in ecological terms, proper training can only forbid these native wealth from extinction in near future.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123472160","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 : 2023-08-02DOI: 10.9734/ajfar/2023/v24i1626
Romi Novriadi, Herman, Shadiqa Malahayati, Steven Kuan
Two growth trials were conducted for 60-days using aquaria tanks (growth trial 1) and 50-days using commercial culture tank (growth trial 2) to assess the potential effect on using phytogenic feed additives (Regavit AquaTM, Ecopharm Hellas, Greece) containing thymol and carvacrol extracted from Oregano plant Origanum Vulgare (OP) by incorporating the OP powder into the diet formulation for trial 1 and top-dressing process of OP liquid for trial 2. The antimicrobial properties of carvacrol and thymol polyphenols were also determined by using minimum inhibitory concentration (MIC) analysis against Vibrio harveyi and Vibrio parahaemolyticus. From the aquaria tank (trial 1), the growth performance, including final average body weight (ABW), percentage weight gain (PWG) and thermal growth coefficient (TGC) of group of shrimp fed with OP were compared to the control treatment. Using top-dressing process (trial 2), the top coating process to the commercial diet enhance the growth performances of shrimp treated with OP compared to the control treatment. From, trial 1, there was clear evidence for elevated hemocyte activity and increased lysozyme in shrimp fed diets supplemented with OP compared to the control treatments. MIC analysis performed in the present study also revealed the ability of OP to inhibit the growth of bacteria at the concentration of 2 × 101 µg mL-1. The results indicate that the inclusion of OP up to 0.6% both in direct inclusion within the diet or using top-dressing process significantly increases the growth and non-specific immune in white shrimps L. vannamei.
{"title":"Supplementation Effect of Dietary Carvacrol and Thymol Polyphenols from Oregano Origanum vulgare on Growth Performance and Health Condition of Pacific White Shrimp Litopenaeus vannamei","authors":"Romi Novriadi, Herman, Shadiqa Malahayati, Steven Kuan","doi":"10.9734/ajfar/2023/v24i1626","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i1626","url":null,"abstract":"Two growth trials were conducted for 60-days using aquaria tanks (growth trial 1) and 50-days using commercial culture tank (growth trial 2) to assess the potential effect on using phytogenic feed additives (Regavit AquaTM, Ecopharm Hellas, Greece) containing thymol and carvacrol extracted from Oregano plant Origanum Vulgare (OP) by incorporating the OP powder into the diet formulation for trial 1 and top-dressing process of OP liquid for trial 2. The antimicrobial properties of carvacrol and thymol polyphenols were also determined by using minimum inhibitory concentration (MIC) analysis against Vibrio harveyi and Vibrio parahaemolyticus. From the aquaria tank (trial 1), the growth performance, including final average body weight (ABW), percentage weight gain (PWG) and thermal growth coefficient (TGC) of group of shrimp fed with OP were compared to the control treatment. Using top-dressing process (trial 2), the top coating process to the commercial diet enhance the growth performances of shrimp treated with OP compared to the control treatment. From, trial 1, there was clear evidence for elevated hemocyte activity and increased lysozyme in shrimp fed diets supplemented with OP compared to the control treatments. MIC analysis performed in the present study also revealed the ability of OP to inhibit the growth of bacteria at the concentration of 2 × 101 µg mL-1. The results indicate that the inclusion of OP up to 0.6% both in direct inclusion within the diet or using top-dressing process significantly increases the growth and non-specific immune in white shrimps L. vannamei.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128909094","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 : 2023-08-02DOI: 10.9734/ajfar/2023/v24i1625
Md. Shanoer Hossen, Sadia Siddika, Shanchita Zaman Choudhury, Joyanta Bir
Aims: Nile tilapia is one of the most consumable and economical fish species in Bangladesh, traditionally co-cultured by sharing with prawn, shrimp and Indian major carp. In tilapia monoculture, suitable protein level in the diet is crucial for better growth of the fish as well as being economically viable. Addressing this aspect, here in this experiment we tried to adopt suitable and economically sustainable feed for better tilapia growth and production. Place and Duration of Study: The experiment was carried out for 75 days in the wet laboratory of FMRT discipline of Khulna University. Methodology: Three available commercial feed with protein percentages of 32.5% (T1), 35% (T2) and 28% (T3) were fed to the juvenile tilapia (mean weight 0.31g) under the laboratory condition. Fish were nursed in rectangular glass aquaria tank (volume 25L) with each three replications for 75 days at the stocking density of 25fry/tank to determine the effect of these feed on growth of tilapia fry. Results: After 75 days culture period the final weight of tilapia under treatment T1 (4.68±0.28) were significantly (p<0.05) higher than treatment T2 (4.01±0.19) and T3 (3.26±0.39). Similarly, the highest SGR was found in T1 followed by T2 and T3, however no significant difference observed among the treatments. FCR was significantly different among the treatment, where the lowest FCR was found in T1 and higher at T3. In contrary, PER was opposite to FCR values, higher in T1 and lower in T3. Again, significant different were observed in protein, lipid and ash content of tilapia among the three treatments. Water quality parameters were found at suitable farming ranges throughout the experimental period. Conclusion: The finding of this experiment suggested that 32.5% protein enriched feed can be suitable for the better growth of tilapia.
{"title":"Comparing the Suitable Different Protein Level and Economically Viable Feed for Tilapia (Oreochromis niloticus) Reared in Glass Tank at Bangladesh","authors":"Md. Shanoer Hossen, Sadia Siddika, Shanchita Zaman Choudhury, Joyanta Bir","doi":"10.9734/ajfar/2023/v24i1625","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i1625","url":null,"abstract":"Aims: Nile tilapia is one of the most consumable and economical fish species in Bangladesh, traditionally co-cultured by sharing with prawn, shrimp and Indian major carp. In tilapia monoculture, suitable protein level in the diet is crucial for better growth of the fish as well as being economically viable. Addressing this aspect, here in this experiment we tried to adopt suitable and economically sustainable feed for better tilapia growth and production. \u0000Place and Duration of Study: The experiment was carried out for 75 days in the wet laboratory of FMRT discipline of Khulna University. \u0000Methodology: Three available commercial feed with protein percentages of 32.5% (T1), 35% (T2) and 28% (T3) were fed to the juvenile tilapia (mean weight 0.31g) under the laboratory condition. Fish were nursed in rectangular glass aquaria tank (volume 25L) with each three replications for 75 days at the stocking density of 25fry/tank to determine the effect of these feed on growth of tilapia fry. \u0000Results: After 75 days culture period the final weight of tilapia under treatment T1 (4.68±0.28) were significantly (p<0.05) higher than treatment T2 (4.01±0.19) and T3 (3.26±0.39). Similarly, the highest SGR was found in T1 followed by T2 and T3, however no significant difference observed among the treatments. FCR was significantly different among the treatment, where the lowest FCR was found in T1 and higher at T3. In contrary, PER was opposite to FCR values, higher in T1 and lower in T3. Again, significant different were observed in protein, lipid and ash content of tilapia among the three treatments. Water quality parameters were found at suitable farming ranges throughout the experimental period. \u0000Conclusion: The finding of this experiment suggested that 32.5% protein enriched feed can be suitable for the better growth of tilapia.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"329 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133876236","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 : 2023-07-22DOI: 10.9734/ajfar/2023/v24i1624
R. Pratama, I. Rostini, Y. Andriani
Heating method such as steaming could influence fisheries commodity chemical composition, notably its flavor components. This study aims to identify the volatile flavor compounds and amino acid composition of steamed Indian mackerel. The samples in this study were steamed (100oC, 30 minutes) Indian mackerel meat which their volatile compounds were extracted using Solid Phase Micro Extraction (SPME) method and identified by Gas Chromatography/Mass Spectrometry (GC/MS), while their amino acids profile were analyzed by High Performance Liquid Chromatography. The volatile components analysis result showed that there were 50 volatile compounds in steamed Indian mackerel. Most volatile compounds detected derived from hydrocarbons, aldehydes, alcohols and ketones groups of compounds. The amino acids profile analysis showed that glutamic acid is the highest quantity amino acids detected in steamed Indian mackerel (3.74%). These results are basically influenced by many factors including heat treatment and various heat-induced reactions.
{"title":"Volatile Flavor Components and Amino Acid Profile of Steamed Indian Mackerel (Rastrelliger sp.)","authors":"R. Pratama, I. Rostini, Y. Andriani","doi":"10.9734/ajfar/2023/v24i1624","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i1624","url":null,"abstract":"Heating method such as steaming could influence fisheries commodity chemical composition, notably its flavor components. This study aims to identify the volatile flavor compounds and amino acid composition of steamed Indian mackerel. The samples in this study were steamed (100oC, 30 minutes) Indian mackerel meat which their volatile compounds were extracted using Solid Phase Micro Extraction (SPME) method and identified by Gas Chromatography/Mass Spectrometry (GC/MS), while their amino acids profile were analyzed by High Performance Liquid Chromatography. The volatile components analysis result showed that there were 50 volatile compounds in steamed Indian mackerel. Most volatile compounds detected derived from hydrocarbons, aldehydes, alcohols and ketones groups of compounds. The amino acids profile analysis showed that glutamic acid is the highest quantity amino acids detected in steamed Indian mackerel (3.74%). These results are basically influenced by many factors including heat treatment and various heat-induced reactions.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116026572","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 : 2023-07-20DOI: 10.9734/ajfar/2023/v24i1623
Iskandar, Muhamad Erpan Saputra, Z. Anna
Aims: The purpose of this article is to examine the potential for adding combinations of carotenoids and phytoestrogen in their feed to the maturity of gonads of different kinds of fish. The method of writing used is the library study, with the journal search stages, journal selection, journal analysis, and journal synthesis. Based on the review of several related journals. The presence of carotenoids and of estrogen in the reproductive process of fish is highly profitable. The carotenoid compound, which is a provitamin a, will help in the development of oocytes primarily with the accumulation of vitellogenin and maintaining fatty acids in the oocytes. Meanwhile, the presence of phytogenic that have structures like endogenous estradiol will assist in synthesizing and producing vitellogenin in the liver. So the size of oocytes would accelerate and impact the rapid ripening of the fish. After a maximum Estrogen measure, a full-flesh-based phytoestrogen will act like a hoflavon to give a MIH signal to be received by the surface of oocyte then passes to the cytoplasm to encourage maturation promoting factor (MPF) that causes germinal vesicle breakdown (GVBD) to the fish's egg. The presence of easily obtained carotenoids and phytoestrogen provided potential additives. Conclusion: The combination of carotenoids and phytoestrogens in feed has the potential to make a considerable contribution to gonadal maturity and reproduction in fish.
{"title":"Importance of Carotenoids and Phytoestrogens in Gonad Maturity of Various Types of Fish","authors":"Iskandar, Muhamad Erpan Saputra, Z. Anna","doi":"10.9734/ajfar/2023/v24i1623","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i1623","url":null,"abstract":"Aims: The purpose of this article is to examine the potential for adding combinations of carotenoids and phytoestrogen in their feed to the maturity of gonads of different kinds of fish. The method of writing used is the library study, with the journal search stages, journal selection, journal analysis, and journal synthesis. Based on the review of several related journals. The presence of carotenoids and of estrogen in the reproductive process of fish is highly profitable. The carotenoid compound, which is a provitamin a, will help in the development of oocytes primarily with the accumulation of vitellogenin and maintaining fatty acids in the oocytes. Meanwhile, the presence of phytogenic that have structures like endogenous estradiol will assist in synthesizing and producing vitellogenin in the liver. So the size of oocytes would accelerate and impact the rapid ripening of the fish. After a maximum Estrogen measure, a full-flesh-based phytoestrogen will act like a hoflavon to give a MIH signal to be received by the surface of oocyte then passes to the cytoplasm to encourage maturation promoting factor (MPF) that causes germinal vesicle breakdown (GVBD) to the fish's egg. The presence of easily obtained carotenoids and phytoestrogen provided potential additives. \u0000Conclusion: The combination of carotenoids and phytoestrogens in feed has the potential to make a considerable contribution to gonadal maturity and reproduction in fish.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131775149","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 : 2023-07-19DOI: 10.9734/ajfar/2023/v23i6620
A. Yustiati, Syifa Masyitoh, Roffi Grandiosa, T. Herawati, I. Bari, I. Suryadi
This study aims to investigate the toxicity effects of plant-based insecticides containing eugenol and azadirachtin on the immune system of Common Carp (Cyprinus carpio L.). Several immunological parameters, including white blood cell count, red blood cell count, stress response, and macroscopic clinical symptoms, were examined [1]. The study was conducted from September to October 2022 at the Ciparanje Inland Fisheries Hatchery, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. This study employed a completely randomized design with six treatments and three replications. The observation period encompassed the measurement of red and white blood cell counts, stress response, and macroscopic clinical symptoms for the initial 14 days. Leukocyte and erythrocyte counts were assessed before and after insecticide exposure on days 3, 7, 10, and 14. Data analysis involved the utilization of quantitative descriptive analysis for red and white blood cell counts. Exposure to plant-based insecticides containing eugenol and azadirachtin resulted in a suppression of the immune system in common carp fry. However, the insecticide treatment with a concentration of 64 ppm (Treatment F) remained safe for common carp. The highest count of white blood cells was observed in Treatment F (64 ppm) on day 3, while the lowest count was recorded in Treatment A (control). Treatment A (control) also exhibited the highest count of red blood cells, whereas Treatment F (64 ppm) displayed the lowest count. Thus, plant-based insecticides with a concentration of 64 ppm can still be safely utilized in common carp.
{"title":"The Effect of Plant-based Insecticides Contains Active Eugenol and Azadirachtin on Immune System of Common Carp (Cyprinus carpio L.)","authors":"A. Yustiati, Syifa Masyitoh, Roffi Grandiosa, T. Herawati, I. Bari, I. Suryadi","doi":"10.9734/ajfar/2023/v23i6620","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v23i6620","url":null,"abstract":"This study aims to investigate the toxicity effects of plant-based insecticides containing eugenol and azadirachtin on the immune system of Common Carp (Cyprinus carpio L.). Several immunological parameters, including white blood cell count, red blood cell count, stress response, and macroscopic clinical symptoms, were examined [1]. The study was conducted from September to October 2022 at the Ciparanje Inland Fisheries Hatchery, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. This study employed a completely randomized design with six treatments and three replications. The observation period encompassed the measurement of red and white blood cell counts, stress response, and macroscopic clinical symptoms for the initial 14 days. Leukocyte and erythrocyte counts were assessed before and after insecticide exposure on days 3, 7, 10, and 14. Data analysis involved the utilization of quantitative descriptive analysis for red and white blood cell counts. Exposure to plant-based insecticides containing eugenol and azadirachtin resulted in a suppression of the immune system in common carp fry. However, the insecticide treatment with a concentration of 64 ppm (Treatment F) remained safe for common carp. The highest count of white blood cells was observed in Treatment F (64 ppm) on day 3, while the lowest count was recorded in Treatment A (control). Treatment A (control) also exhibited the highest count of red blood cells, whereas Treatment F (64 ppm) displayed the lowest count. Thus, plant-based insecticides with a concentration of 64 ppm can still be safely utilized in common carp.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125918245","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 : 2023-07-19DOI: 10.9734/ajfar/2023/v23i6621
Md. Hashibur Rahman, M. A. Alam, Flura, M. Moniruzzaman, Sharmin Sultana, Al-amin, B. Das
The study was conducted to assess the growth performance and feed conversion ratio (FCR) of Oreochromis niloticus fry reared in experimental ponds. A stocking density of 360 fish/decimal with three feeding frequency T1 (four times/day), T2 (three times/day) and T3 (two times/day) was maintained each with three replications. The fry was initially fed at 30% of their body weight and the rate was reduced up to 5% gradually at the final stage. The survival rate was 95.65±0.367, 93.00±0.709 and 90.50±0.707 % in T1, T2 and T3, respectively. The best FCR value was obtained in T1 (0.983±0.0057) and the significantly (p˂0.05) highest fish production was also observed in T1 (65.67±0.52 kg/dec/120 days). At the end of the experiment, the mean weight gain was recorded as 327.49±2.32, 294.55±0.87 and 244.72±2.33 g in T1, T2 and T3, respectively. The highest percent weight gain (%) was observed in T1 (5468.78±38.87) followed by T2 (5167.54±27.13) and T3 (4293.27±17.36). The specific growth rate (SGR) was also highest in T1 (3.48±0.03) while the lowest SGR was found in T3 (3.15±0.01%). The results revealed that feeding frequency effect positively on the growth performance of Tilapia.
{"title":"Effects of Different Feeding Frequencies on Growth Performance and Feed Conversion Ratio (FCR) of Tilapia, Oreochromis niloticus","authors":"Md. Hashibur Rahman, M. A. Alam, Flura, M. Moniruzzaman, Sharmin Sultana, Al-amin, B. Das","doi":"10.9734/ajfar/2023/v23i6621","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v23i6621","url":null,"abstract":"The study was conducted to assess the growth performance and feed conversion ratio (FCR) of Oreochromis niloticus fry reared in experimental ponds. A stocking density of 360 fish/decimal with three feeding frequency T1 (four times/day), T2 (three times/day) and T3 (two times/day) was maintained each with three replications. The fry was initially fed at 30% of their body weight and the rate was reduced up to 5% gradually at the final stage. The survival rate was 95.65±0.367, 93.00±0.709 and 90.50±0.707 % in T1, T2 and T3, respectively. The best FCR value was obtained in T1 (0.983±0.0057) and the significantly (p˂0.05) highest fish production was also observed in T1 (65.67±0.52 kg/dec/120 days). At the end of the experiment, the mean weight gain was recorded as 327.49±2.32, 294.55±0.87 and 244.72±2.33 g in T1, T2 and T3, respectively. The highest percent weight gain (%) was observed in T1 (5468.78±38.87) followed by T2 (5167.54±27.13) and T3 (4293.27±17.36). The specific growth rate (SGR) was also highest in T1 (3.48±0.03) while the lowest SGR was found in T3 (3.15±0.01%). The results revealed that feeding frequency effect positively on the growth performance of Tilapia.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124950801","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 : 2023-07-19DOI: 10.9734/ajfar/2023/v24i1622
U. George, O. O. Ajayi, I. George, U. Vincent
The toxicity of lantana camara on the survival and histopathology of gills of Clarias gariepinus fish from Fisheries unit, Akwa Ibom State University Obio Akpa, farm was studied in two batches (A, and B) using the ethanolic extract (EE) of Lantana camara for 96 hours under laboratory conditions. Five concentrations ranging from 0, 2, 3, 4, and 5 mg/L were prepared from the (EE) of L. camara for the toxicity test. The experimental animals showed different percentage mortalities with toxicant concentrations. The 96 hours LC50 for C. gariepinus for both batches (A, and B) was given at 2.983 mg/l representing a log transformed concentration of 0.475 mg/l a point where 50 % of the test organisms would be killed at the end of the experiment. The different batches of C. gariepinus (P>0.05) had no significant difference in mortality indicating that the ethanolic extract had same toxic effects on the test organisms. Toxicant exposure induced behavioral changes such as abnormal and uncoordinated swimming movement, restlessness, respiratory difficulties and attempt at jumping out was observed during the study. The results of the present study suggest that the ethanolic extract of L. camara had severe impacts on the test organism resulting in mortality. The effects of the plant extract on the gills of C. gariepinus fingerlings had severe impacts on the test organisms. Samples were taken from each of the concentrations to examine the effects of the extract on the gills of C. gariepinus. There was no observable change in the gills of the test organism in the control group. In the 2 mg/l concentration, the gill showed diffused epithelial degeneration of the primary lamella., in the 3 mg/l and 4mg/l concentration it was observed that the gills showed complete diffused epithelial degeneration of the lamella. Although cartilaginous filament of the epithelium was preserved between the two adjacent filament in skeletal muscle. Finally, in the 5 mg/l concentration the gill section showed diffused epithelial degeneration of the primary lamella and few retained processes of the secondary lamella. From the findings, it is observed that extract obtained from L. camara is toxic to aquatic life. Therefore, effective management strategies should be put in place to ensure safety compliance.
{"title":"Establishing a Dose-response Toxicity for Clarias gariepinus Fingerlings Exposed to Ethanolic Extract of Lantana camara","authors":"U. George, O. O. Ajayi, I. George, U. Vincent","doi":"10.9734/ajfar/2023/v24i1622","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v24i1622","url":null,"abstract":"The toxicity of lantana camara on the survival and histopathology of gills of Clarias gariepinus fish from Fisheries unit, Akwa Ibom State University Obio Akpa, farm was studied in two batches (A, and B) using the ethanolic extract (EE) of Lantana camara for 96 hours under laboratory conditions. Five concentrations ranging from 0, 2, 3, 4, and 5 mg/L were prepared from the (EE) of L. camara for the toxicity test. The experimental animals showed different percentage mortalities with toxicant concentrations. The 96 hours LC50 for C. gariepinus for both batches (A, and B) was given at 2.983 mg/l representing a log transformed concentration of 0.475 mg/l a point where 50 % of the test organisms would be killed at the end of the experiment. The different batches of C. gariepinus (P>0.05) had no significant difference in mortality indicating that the ethanolic extract had same toxic effects on the test organisms. Toxicant exposure induced behavioral changes such as abnormal and uncoordinated swimming movement, restlessness, respiratory difficulties and attempt at jumping out was observed during the study. The results of the present study suggest that the ethanolic extract of L. camara had severe impacts on the test organism resulting in mortality. The effects of the plant extract on the gills of C. gariepinus fingerlings had severe impacts on the test organisms. Samples were taken from each of the concentrations to examine the effects of the extract on the gills of C. gariepinus. There was no observable change in the gills of the test organism in the control group. In the 2 mg/l concentration, the gill showed diffused epithelial degeneration of the primary lamella., in the 3 mg/l and 4mg/l concentration it was observed that the gills showed complete diffused epithelial degeneration of the lamella. Although cartilaginous filament of the epithelium was preserved between the two adjacent filament in skeletal muscle. Finally, in the 5 mg/l concentration the gill section showed diffused epithelial degeneration of the primary lamella and few retained processes of the secondary lamella. From the findings, it is observed that extract obtained from L. camara is toxic to aquatic life. Therefore, effective management strategies should be put in place to ensure safety compliance.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127012515","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 : 2023-07-18DOI: 10.9734/ajfar/2023/v23i6619
Randi, A. Marimba, M. Palo
The blue swimming crab fishermen in Teluk Makassar, Lantebung Village tend to exploit the blue swimming crab resources without considering Sustainable Fisheries and environmental sustainability by using non-environmentally friendly fishing gear. The innovation of constructing a trap with an escape hatch is expected to provide an opportunity for undersized blue swimming crabs (carapace width < 10 cm) to escape from the trap through the escape hatch. This research aims to determine the selectivity and effectiveness of using the escape hatch to allow blue swimming crabs to escape in the waters of Teluk Makassar, Lantebung Village. The research was conducted for two months, from November to December 2022. Blue swimming crab samples were collected from foldable traps and dragon traps used by the fishermen, and the crabs were collected while still alive. The experimental method was employed, with four treatments and 21 replications. Based on the estimation of the selection ogive and the selectivity ogive curve, it can be concluded that the selectivity of the 3.5x4 escape hatch is more effective in allowing blue swimming crabs with carapace width below 10 cm to escape compared to other escape hatch sizes, thus avoiding the capture of immature or maturing crabs with mature gonads.
{"title":"Selective Gap Analysis of the Escape Hatch in the Umbrella Trap with Six Doors for the Blue Swimming Crab (Portunus pelagicus)","authors":"Randi, A. Marimba, M. Palo","doi":"10.9734/ajfar/2023/v23i6619","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v23i6619","url":null,"abstract":"The blue swimming crab fishermen in Teluk Makassar, Lantebung Village tend to exploit the blue swimming crab resources without considering Sustainable Fisheries and environmental sustainability by using non-environmentally friendly fishing gear. The innovation of constructing a trap with an escape hatch is expected to provide an opportunity for undersized blue swimming crabs (carapace width < 10 cm) to escape from the trap through the escape hatch. This research aims to determine the selectivity and effectiveness of using the escape hatch to allow blue swimming crabs to escape in the waters of Teluk Makassar, Lantebung Village. The research was conducted for two months, from November to December 2022. Blue swimming crab samples were collected from foldable traps and dragon traps used by the fishermen, and the crabs were collected while still alive. The experimental method was employed, with four treatments and 21 replications. Based on the estimation of the selection ogive and the selectivity ogive curve, it can be concluded that the selectivity of the 3.5x4 escape hatch is more effective in allowing blue swimming crabs with carapace width below 10 cm to escape compared to other escape hatch sizes, thus avoiding the capture of immature or maturing crabs with mature gonads.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121428856","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 : 2023-07-17DOI: 10.9734/ajfar/2023/v23i6617
Indah Rahmawati, E. Liviawaty, R. Pratama, Junianto
Carrageenan is a hydrocolloid compound found in red seaweed (Rodhophyta). Carrageenan-producing sources are Eucheuma cottonii seaweed with kappa carrageenan type and Eucheuma spinoum with iota carrageenan type. Kappa carrageenan is widely used in food products because its availability is very abundant in nature compared to iota and lambda carrageenan types. The boiling method with an alkaline solution is a method that is often used in extracting carrageenan. Carrageenan has properties as a stabilizer, thickener, gelling agent, and emulsifier. Carrageenan is widely applied in the food and non-food sector. In food products, carrageenan functions as a food additive, thickener, and emulsifier, and can increase the protein and fiber content of a food product.
{"title":"Carrageenan in Seaweed (Eucheuma sp.) and Use of Carrageenan in Fishery Food Products: A Review","authors":"Indah Rahmawati, E. Liviawaty, R. Pratama, Junianto","doi":"10.9734/ajfar/2023/v23i6617","DOIUrl":"https://doi.org/10.9734/ajfar/2023/v23i6617","url":null,"abstract":"Carrageenan is a hydrocolloid compound found in red seaweed (Rodhophyta). Carrageenan-producing sources are Eucheuma cottonii seaweed with kappa carrageenan type and Eucheuma spinoum with iota carrageenan type. Kappa carrageenan is widely used in food products because its availability is very abundant in nature compared to iota and lambda carrageenan types. The boiling method with an alkaline solution is a method that is often used in extracting carrageenan. Carrageenan has properties as a stabilizer, thickener, gelling agent, and emulsifier. Carrageenan is widely applied in the food and non-food sector. In food products, carrageenan functions as a food additive, thickener, and emulsifier, and can increase the protein and fiber content of a food product.","PeriodicalId":168203,"journal":{"name":"Asian Journal of Fisheries and Aquatic Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130427962","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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