Fish cells have been accepted as an alternative to in vivo assay for inflammatory effects of therapeutic experimental systems. To reveal the anti-inflammatory effects of Inula viscosa (IV) fish cell line RTG-2, derived from the gonadal tissue of rainbow trout, was infected with lipopolysaccharide (LPS). Effective concentrations for different concentrations of LPS (1, 5, 10, 20 µM) and IN (1, 5, 10, 20 µg ml–1) were determined. While the 20 µM concentration of LPS, which was effectively selected from preliminary tests, caused 27% cell loss, the effective 1 µg ml–1 concentration of IN caused 1.1% proliferation in the cells when compared to the control group. All pro-inflammatory parameters investigated in LPS-induced RTG-2 cells showed up-regulation, with the highest increase in TNF-α gene expression level (11.3 fold changes). Down-regulation was determined in the IN together with LPS administered group and IL-1β had the highest effect with 96%. IL-6 protein level decreased by LPS at a rate of 4% and IN together with LPS increased by 9%. The IN exhibited significant efficacy against inflammation caused by LPS. However, further studies are needed to determine pharmacological activity of I. viscosa in details.
{"title":"Investigation on the effects of Inula viscosa L. on rainbow trout gonad cells induced by lipopolysaccharide","authors":"Azime Küçükgül, A. Küçükgül, Tülay Metin Korkmaz","doi":"10.17017/j.fish.218","DOIUrl":"https://doi.org/10.17017/j.fish.218","url":null,"abstract":"Fish cells have been accepted as an alternative to in vivo assay for inflammatory effects of therapeutic experimental systems. To reveal the anti-inflammatory effects of Inula viscosa (IV) fish cell line RTG-2, derived from the gonadal tissue of rainbow trout, was infected with lipopolysaccharide (LPS). Effective concentrations for different concentrations of LPS (1, 5, 10, 20 µM) and IN (1, 5, 10, 20 µg ml–1) were determined. While the 20 µM concentration of LPS, which was effectively selected from preliminary tests, caused 27% cell loss, the effective 1 µg ml–1 concentration of IN caused 1.1% proliferation in the cells when compared to the control group. All pro-inflammatory parameters investigated in LPS-induced RTG-2 cells showed up-regulation, with the highest increase in TNF-α gene expression level (11.3 fold changes). Down-regulation was determined in the IN together with LPS administered group and IL-1β had the highest effect with 96%. IL-6 protein level decreased by LPS at a rate of 4% and IN together with LPS increased by 9%. The IN exhibited significant efficacy against inflammation caused by LPS. However, further studies are needed to determine pharmacological activity of I. viscosa in details.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"24 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80278859","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}
Sea grapes are among the seaweeds being commercialized in the Philippines. They are sold in fresh state, and are highly perishable. It is necessary to develop preservation techniques in order to lengthen its shelf life. This study aims to assess the physico-chemical, microbial and sensorial quality of sea grape Caulerpa lentillifera preserved in 0%, 5%, 10% and 15% brine concentrations. Results revealed that brining effectively extended the shelf life of C. lentillifera by inhibiting the growth of bacteria and maintaining the osmotic pressure between the product and the solution. Within the 10 days storage period, 10% and 15% were bacteriologically stable and more acceptable upon rehydration. Treatments 0% and 5% were not acceptable because it exceeded the bacterial limit set for fresh vegetables. The sensorial attributes were compromised and became less acceptable due to degradation through bacterial action. In terms of physico-chemical analysis, high salt concentration (15%) decreased chlorophyll and carotenoid content significantly due to shrinkage and water loss. Overall, this study proved that sea grapes in 10% brine solution can extend its shelf life.
{"title":"Quality changes in sea grape, Caulerpa lentillifera at different brine concentrations","authors":"P. D. H. Tolentino, J. Sorio","doi":"10.17017/j.fish.278","DOIUrl":"https://doi.org/10.17017/j.fish.278","url":null,"abstract":"Sea grapes are among the seaweeds being commercialized in the Philippines. They are sold in fresh state, and are highly perishable. It is necessary to develop preservation techniques in order to lengthen its shelf life. This study aims to assess the physico-chemical, microbial and sensorial quality of sea grape Caulerpa lentillifera preserved in 0%, 5%, 10% and 15% brine concentrations. Results revealed that brining effectively extended the shelf life of C. lentillifera by inhibiting the growth of bacteria and maintaining the osmotic pressure between the product and the solution. Within the 10 days storage period, 10% and 15% were bacteriologically stable and more acceptable upon rehydration. Treatments 0% and 5% were not acceptable because it exceeded the bacterial limit set for fresh vegetables. The sensorial attributes were compromised and became less acceptable due to degradation through bacterial action. In terms of physico-chemical analysis, high salt concentration (15%) decreased chlorophyll and carotenoid content significantly due to shrinkage and water loss. Overall, this study proved that sea grapes in 10% brine solution can extend its shelf life.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"37 4 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84691428","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}
Mud clam (Geloina coaxans) are underutilised food source due to the lack of consumer preference in Sri Lanka. Hence, this study was conducted to produce clam sauce as a value added product using the muscle of mud clams by means of accelerated fermentation method. Specimens were collected from Tambalagam Bay, Sri Lanka. Shell length, height, inflation, total weight with shell and without shell were 6.3 ± 0.4 cm, 5.3 ± 0.3 cm, 3.5 ± 0.3 cm, 83.1 ± 13.4 g and 14.9 ± 1.3 g respectively. The extracted mean meat yield was 14.9 ± 1.3% per mud clam. Moisture, crude protein, crude lipid and ash (dry weight) content of raw meat were 80.45 ± 0.89%, 64.14 ± 0.96%, 3.55 ± 0.39% and 7.54 ± 0.61% respectively. Final sauce product shows liquid yield, energy value, 0Brix value, pH, % NaCl, total nitrogen, moisture and ash content as 98.3 ± 5.5 ml 100g–1, 2124 ± 133 J g–1, 24.3 ± 0.9%, 5.02 ± 0.04, 14.53 ± 0.27%, 0.27 ± 0.01%, 74.06 ± 0.56% and 19.66 ± 1.99% respectively. The study concluded that the mud clam meat is a possible candidate as a raw material for the production of clam sauce.
{"title":"Potential use of mud clam (Geloina coaxans) in producing sauce with papaya crude extraction as a protein hydrolysing agent","authors":"H. Wijerathna, K. Radampola, H. W. Cyril","doi":"10.17017/j.fish.269","DOIUrl":"https://doi.org/10.17017/j.fish.269","url":null,"abstract":"Mud clam (Geloina coaxans) are underutilised food source due to the lack of consumer preference in Sri Lanka. Hence, this study was conducted to produce clam sauce as a value added product using the muscle of mud clams by means of accelerated fermentation method. Specimens were collected from Tambalagam Bay, Sri Lanka. Shell length, height, inflation, total weight with shell and without shell were 6.3 ± 0.4 cm, 5.3 ± 0.3 cm, 3.5 ± 0.3 cm, 83.1 ± 13.4 g and 14.9 ± 1.3 g respectively. The extracted mean meat yield was 14.9 ± 1.3% per mud clam. Moisture, crude protein, crude lipid and ash (dry weight) content of raw meat were 80.45 ± 0.89%, 64.14 ± 0.96%, 3.55 ± 0.39% and 7.54 ± 0.61% respectively. Final sauce product shows liquid yield, energy value, 0Brix value, pH, % NaCl, total nitrogen, moisture and ash content as 98.3 ± 5.5 ml 100g–1, 2124 ± 133 J g–1, 24.3 ± 0.9%, 5.02 ± 0.04, 14.53 ± 0.27%, 0.27 ± 0.01%, 74.06 ± 0.56% and 19.66 ± 1.99% respectively. The study concluded that the mud clam meat is a possible candidate as a raw material for the production of clam sauce.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"99 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90528520","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}
The goal of this research was to determine the growth dependent changes in protein efficiency and amino acid composition of the cultured meagre Argyrosomus regius (Asso, 1801). The research was carried in net cages in a private company (Gokce Off-shore Sist.) in the Aegean Sea. Meagre of an initial weight of 8.22 ± 0.13 g reached to 373.96 ± 15.65 g in 420 days of production period. Average protein efficiency rate, protein store rate and protein consumption values of cultured meagre were 1.05 ± 0.11%, 11.49 ± 2.98% and 56.67 ± 14.52 g respectively. The total amino acid values varied between 14.97 ± 0.14 and 18.87 ± 0.10 g 100g–1, the statistical difference among the study periods was significant (p < 0.05). Most of the total essential (EAA), non-essential (NEAA), and branched‐chain amino acid values of cultured meagre were decreasing with increasing fish size but EAA/NEAA ratios were increasing. The findings of this study showed that the composition of amino acids and the consistency of meagre culture were adequate and appropriate for human consumption and nutrition.
{"title":"Growth dependent changes in protein efficiency and amino acid composition in cultured meagre Argyrosomus regius","authors":"B. Baki, D. Öztürk, M. Kerim","doi":"10.17017/j.fish.274","DOIUrl":"https://doi.org/10.17017/j.fish.274","url":null,"abstract":"The goal of this research was to determine the growth dependent changes in protein efficiency and amino acid composition of the cultured meagre Argyrosomus regius (Asso, 1801). The research was carried in net cages in a private company (Gokce Off-shore Sist.) in the Aegean Sea. Meagre of an initial weight of 8.22 ± 0.13 g reached to 373.96 ± 15.65 g in 420 days of production period. Average protein efficiency rate, protein store rate and protein consumption values of cultured meagre were 1.05 ± 0.11%, 11.49 ± 2.98% and 56.67 ± 14.52 g respectively. The total amino acid values varied between 14.97 ± 0.14 and 18.87 ± 0.10 g 100g–1, the statistical difference among the study periods was significant (p < 0.05). Most of the total essential (EAA), non-essential (NEAA), and branched‐chain amino acid values of cultured meagre were decreasing with increasing fish size but EAA/NEAA ratios were increasing. The findings of this study showed that the composition of amino acids and the consistency of meagre culture were adequate and appropriate for human consumption and nutrition.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82952435","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}
A. Mouludi-Saleh, S. Eagderi, K. Abbasi, S. Salavatian
In this study, the length-weight relationships (LWRs) and condition factor (K) were estimated for 1334 specimens belonging to ten species including Acanthobrama marmid, A. microlepis, A. urmianus, Romanogobio persus, Leuciscus aspius, Luciobarbus capito, L. mursa, L. caspius, Alburnus atropatenae and Petroleuciscus ulanus from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran. The total length and weight of the individuals varied from 3.4 to 84.5 cm and 0.4 to 6600 g respectively. The values of the slope parameter (b) and condition factor ranged from 2.99 – 3.38 and 0.79 – 1.25 respectively. LWRs with high correlation coefficients were calculated for all species (R2 > 0.95). Based on the results, the allometric growth pattern of the studied species were positive except for L. aspius, L. capito, L. mursa and P. ulanus. This study provides useful data regarding the LWRs and condition factor of ten fish species in Iranian inland waters that can be used in fisheries management, stock assessment and future studies.
{"title":"Length–weight relationship and condition factor of ten cyprinid fish species from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran","authors":"A. Mouludi-Saleh, S. Eagderi, K. Abbasi, S. Salavatian","doi":"10.17017/j.fish.268","DOIUrl":"https://doi.org/10.17017/j.fish.268","url":null,"abstract":"In this study, the length-weight relationships (LWRs) and condition factor (K) were estimated for 1334 specimens belonging to ten species including Acanthobrama marmid, A. microlepis, A. urmianus, Romanogobio persus, Leuciscus aspius, Luciobarbus capito, L. mursa, L. caspius, Alburnus atropatenae and Petroleuciscus ulanus from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran. The total length and weight of the individuals varied from 3.4 to 84.5 cm and 0.4 to 6600 g respectively. The values of the slope parameter (b) and condition factor ranged from 2.99 – 3.38 and 0.79 – 1.25 respectively. LWRs with high correlation coefficients were calculated for all species (R2 > 0.95). Based on the results, the allometric growth pattern of the studied species were positive except for L. aspius, L. capito, L. mursa and P. ulanus. This study provides useful data regarding the LWRs and condition factor of ten fish species in Iranian inland waters that can be used in fisheries management, stock assessment and future studies.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88465806","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 : 2021-02-10DOI: 10.21203/RS.3.RS-157750/V1
S. Mekonen, Abera Hailu
This study was carried out along a tributary of Gibe Sheleko National Park to investigate the diversity, relative abundance and morphometric characteristics of fish. By using monofilament gill-nets, fish were collected, their species identifiedand their morphometric data measured. A total of 10 species were identified, dominated overall by Synodontis schall (28.52%), followed by Labeobarbus nedgia (18.88%) and Labeobarbus intermedius (14.06%). According to the Index of Relative Importance (IRI), S. schall was also first (49.13%), followed by L. intermedius (15.49%). There were no significance differences in the IRI values of fish and relative abundance between the dry and wet season (p > 0.05). Synodontis schall had the largest girth (23.1 cm), but Clarias gariepinus had the largest eye diameter (8.4 mm) and body weight (1713.4 g). Heterobranchus longifilis was first in total fork and standard length (64.7 cm, 64.7 cm and 59.8 cm, respectively). However, the paired t test of the total body length was not significantly different from the fork length (Pn> 0.05), but not showing statistical differences from standard length, weight and girth (P < 0.05). Gibe River had a higher number of species (N) than Wabe River in both seasons. The Shannon Diversity Index (H') in Gibe River was also higher (2.09) than Wabe (1.84) during the dry season, but lowest in the wet season (1.52 and 1.57, respectively). Furthermore, both (N) and (H') were not statistically different between tributaries and seasons (p > 0.05). Generally, differences in sampling habitats and fishing effort might have contributed to discovered variants findings. Fishery development should be implemented in the Park to use the fish resource sustainably.
{"title":"Ichthyofauna of Gibe Sheleko National Park and Some Morphometric Relationships of Fish of the Tributary Rivers, Southern Ethiopia","authors":"S. Mekonen, Abera Hailu","doi":"10.21203/RS.3.RS-157750/V1","DOIUrl":"https://doi.org/10.21203/RS.3.RS-157750/V1","url":null,"abstract":"\u0000 This study was carried out along a tributary of Gibe Sheleko National Park to investigate the diversity, relative abundance and morphometric characteristics of fish. By using monofilament gill-nets, fish were collected, their species identifiedand their morphometric data measured. A total of 10 species were identified, dominated overall by Synodontis schall (28.52%), followed by Labeobarbus nedgia (18.88%) and Labeobarbus intermedius (14.06%). According to the Index of Relative Importance (IRI), S. schall was also first (49.13%), followed by L. intermedius (15.49%). There were no significance differences in the IRI values of fish and relative abundance between the dry and wet season (p > 0.05). Synodontis schall had the largest girth (23.1 cm), but Clarias gariepinus had the largest eye diameter (8.4 mm) and body weight (1713.4 g). Heterobranchus longifilis was first in total fork and standard length (64.7 cm, 64.7 cm and 59.8 cm, respectively). However, the paired t test of the total body length was not significantly different from the fork length (Pn> 0.05), but not showing statistical differences from standard length, weight and girth (P < 0.05). Gibe River had a higher number of species (N) than Wabe River in both seasons. The Shannon Diversity Index (H') in Gibe River was also higher (2.09) than Wabe (1.84) during the dry season, but lowest in the wet season (1.52 and 1.57, respectively). Furthermore, both (N) and (H') were not statistically different between tributaries and seasons (p > 0.05). Generally, differences in sampling habitats and fishing effort might have contributed to discovered variants findings. Fishery development should be implemented in the Park to use the fish resource sustainably.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"76 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80130134","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}
Effects of feeding frequency on the growth performance and production of Clarias batrachus was evaluated for a period of 180 days. Feeding frequency were once (T1), twice (T2) and thrice (T3) per day. Stocking density was 16750 fingerlings ha–1. The fish were initially fed 28% protein containing formulated feed at the rate of 8% of body weight which subsequently reduced to 5% at the end. The water quality parameters were monitored fortnightly and found similar across treatments and remained within the suitable ranges for aquaculture. The mean weight gain was 41.14±0.15, 44.49±0.78 and 56.10±0.86 g and specific growth rate (SGR) of 1.29±0.002, 1.33±0.01 and 1.44±0.01% per day in T1, T2 and T3 respectively. The highest survival rate was in T2 (96.23±0.76%) whereas the lowest was in T1 (95.32±0.76%). The lowest FCR (=best; 1.65±0.12) was found in T3 and the highest FCR (=worst; 2.14±0.15) was recorded in T1. The highest production was observed in T3 (3559.27±85.95 kg ha–1), which was significantly higher than that of other treatments. This study concludes that feeding three times per day is effective for C. batrachus.
以180 d为试验期，研究了不同投喂频率对batrachus生长性能和产量的影响。饲喂频率分别为每天1次(T1)、2次(T2)和3次(T3)。放养密度为16750尾/ h。试验初期以体重的8%饲喂含28%蛋白质的配方饲料，后期降至5%。每两周监测一次水质参数，发现不同处理的水质参数相似，并保持在适合水产养殖的范围内。T1、T2和T3的平均日增重分别为41.14±0.15、44.49±0.78和56.10±0.86 g，特定生长率(SGR)分别为1.29±0.002、1.33±0.01和1.44±0.01%。T2生存率最高(96.23±0.76%)，T1生存率最低(95.32±0.76%)。最低FCR(=最佳;T3为1.65±0.12)，FCR最高(=最差;T1为2.14±0.15)。T3处理产量最高(3559.27±85.95 kg ha-1)，显著高于其他处理。本研究结果表明，每天饲喂三次是有效的。
{"title":"Effects of feeding frequency on the growth and production performance of indigenous catfish Clarias batrachus (Linnaeus, 1758) in ponds of Northern Bangladesh","authors":"Md. Selim Reza, M. Samad, J. Ferdous","doi":"10.17017/j.fish.302","DOIUrl":"https://doi.org/10.17017/j.fish.302","url":null,"abstract":"Effects of feeding frequency on the growth performance and production of Clarias batrachus was evaluated for a period of 180 days. Feeding frequency were once (T1), twice (T2) and thrice (T3) per day. Stocking density was 16750 fingerlings ha–1. The fish were initially fed 28% protein containing formulated feed at the rate of 8% of body weight which subsequently reduced to 5% at the end. The water quality parameters were monitored fortnightly and found similar across treatments and remained within the suitable ranges for aquaculture. The mean weight gain was 41.14±0.15, 44.49±0.78 and 56.10±0.86 g and specific growth rate (SGR) of 1.29±0.002, 1.33±0.01 and 1.44±0.01% per day in T1, T2 and T3 respectively. The highest survival rate was in T2 (96.23±0.76%) whereas the lowest was in T1 (95.32±0.76%). The lowest FCR (=best; 1.65±0.12) was found in T3 and the highest FCR (=worst; 2.14±0.15) was recorded in T1. The highest production was observed in T3 (3559.27±85.95 kg ha–1), which was significantly higher than that of other treatments. This study concludes that feeding three times per day is effective for C. batrachus.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82931959","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}
A prolific study was conducted to find out the impact of pollution on the socio-economic status of the fishermen community of Tribeni, Kuntighat - Hooghly, West Bengal, who depend on the rivers Saraswati, Kunti and Ganga for their livelihood. Analysis of important water quality parameters clearly reflects the pollution status of the rivers Saraswati and Kunti. Investigation was carried out by a previously tested questionnaire and personal interaction with 100 fishermen based on which the probable reasons of decline in fish diversity were drawn, which consequently adversely affected the economic conditions of fishermen. The investigation revealed a positive correlation between discharge of industrial effluents, in turn depleting the availability of fish food organisms and fish diversity and warning socioeconomic conditions of fishermen. Results clearly indicate proper steps should be taken by the policy makers towards restoration of water quality and thereby helping the vulnerable fishermen.
{"title":"Water pollution effects of river Saraswati and Kunti on livelihood: a case study of fishermen communities in Tribeni and Kuntighat, Hooghly, West Bengal","authors":"A. Panigrahi, S. Pattnaik","doi":"10.17017/j.fish.293","DOIUrl":"https://doi.org/10.17017/j.fish.293","url":null,"abstract":"A prolific study was conducted to find out the impact of pollution on the socio-economic status of the fishermen community of Tribeni, Kuntighat - Hooghly, West Bengal, who depend on the rivers Saraswati, Kunti and Ganga for their livelihood. Analysis of important water quality parameters clearly reflects the pollution status of the rivers Saraswati and Kunti. Investigation was carried out by a previously tested questionnaire and personal interaction with 100 fishermen based on which the probable reasons of decline in fish diversity were drawn, which consequently adversely affected the economic conditions of fishermen. The investigation revealed a positive correlation between discharge of industrial effluents, in turn depleting the availability of fish food organisms and fish diversity and warning socioeconomic conditions of fishermen. Results clearly indicate proper steps should be taken by the policy makers towards restoration of water quality and thereby helping the vulnerable fishermen.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"188 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91065813","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}
S. Nabi, Md Akhtar Hossain, M. M. Alam, M. Harun-ur-Rashid, Md. Anwar Hossain
Aquaculture of homestead ponds under drought prone areas is climatically challenged by increased temperature and decreased water level. These ponds are potentials for farming of a short cycle aquaculture species like Heteropneustes fossilis with carps but lack of appropriate species combination is the major constraint for promotion of this technique. To address this problem, an experiment was carried out during July to December, 2019 to evaluate the production and economics of H. fossilis based polyculture under different carp species combinations in homestead ponds in Tanore of Rajshahi district, Bangladesh. Three different combination of carps were tested under three treatments as T1: Labeo rohita dominant carps (L. rohita 50%, Gibelion catla 25% and Hypophthalmichthys molitrix 25%); T2: G. catla dominant carps (L. rohita 25%, G. catla 50% and H. molitrix 25%); and T3: H. molitrix dominant carps (L. rohita 25%, G. catla 25% and H. molitrix 50%), each with three replications. Stocking densities were 123500 ha–1 for of H. fossilis was and 988 ha–1 for carps. Water quality was monitored monthly and found within acceptable range. T3 was found significantly (p < 0.05) better than other groups in terms of yield and cost benefit ratio.
{"title":"Effect of carp species combination on production and economics of stinging catfish, Heteropneustes fossilis based polyculture in homestead ponds under drought prone area of Bangladesh","authors":"S. Nabi, Md Akhtar Hossain, M. M. Alam, M. Harun-ur-Rashid, Md. Anwar Hossain","doi":"10.17017/j.fish.282","DOIUrl":"https://doi.org/10.17017/j.fish.282","url":null,"abstract":"Aquaculture of homestead ponds under drought prone areas is climatically challenged by increased temperature and decreased water level. These ponds are potentials for farming of a short cycle aquaculture species like Heteropneustes fossilis with carps but lack of appropriate species combination is the major constraint for promotion of this technique. To address this problem, an experiment was carried out during July to December, 2019 to evaluate the production and economics of H. fossilis based polyculture under different carp species combinations in homestead ponds in Tanore of Rajshahi district, Bangladesh. Three different combination of carps were tested under three treatments as T1: Labeo rohita dominant carps (L. rohita 50%, Gibelion catla 25% and Hypophthalmichthys molitrix 25%); T2: G. catla dominant carps (L. rohita 25%, G. catla 50% and H. molitrix 25%); and T3: H. molitrix dominant carps (L. rohita 25%, G. catla 25% and H. molitrix 50%), each with three replications. Stocking densities were 123500 ha–1 for of H. fossilis was and 988 ha–1 for carps. Water quality was monitored monthly and found within acceptable range. T3 was found significantly (p < 0.05) better than other groups in terms of yield and cost benefit ratio.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"47 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91072717","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}
Debjit Das, Soumalya Mukhopadhyay, Adity Sarbajna, S. Chakraborty
Fish is an important food item that contains perfect combination of essential nutrients. The main consumable fishes in West Bengal, India are various carps and other small indigenous fishes. The objective of the study was to find out whether fish weight was a crucial factor to decide pricing and what kind of fish was beneficial for consumer from economic perspective. Thirteen markets in four districts (Kolkata, North and South 24 Parganas, Howrah) of West Bengal were surveyed to collect information about price, weight and number of vendors selling a particular fish considering 22 fish species. Subsequent statistical analyses were performed to conclude about the relationship between fish weight and price. The study indicates that pricing of every fish species does not depend solely on their weight. Weight plays important role to determine the price of few fish species such as Liza persia, Lates calcarifer, Wallago attu, Ompok pabo and Mystus tengara. But, the price of small indigenous fishes like Chanda nama, Colisa fasciata, Harpadon nehereus, Monopterus cuchia, Rhingomugil corsula, Sperata aor and Puntius puntio does not depend on the weight of individual fish. Seasonal availability, taste, consumer’s personal preference have important role to determine fish price.
{"title":"Does fish price depend solely on weight? A market survey analysis from four districts of West Bengal, India","authors":"Debjit Das, Soumalya Mukhopadhyay, Adity Sarbajna, S. Chakraborty","doi":"10.17017/j.fish.263","DOIUrl":"https://doi.org/10.17017/j.fish.263","url":null,"abstract":"Fish is an important food item that contains perfect combination of essential nutrients. The main consumable fishes in West Bengal, India are various carps and other small indigenous fishes. The objective of the study was to find out whether fish weight was a crucial factor to decide pricing and what kind of fish was beneficial for consumer from economic perspective. Thirteen markets in four districts (Kolkata, North and South 24 Parganas, Howrah) of West Bengal were surveyed to collect information about price, weight and number of vendors selling a particular fish considering 22 fish species. Subsequent statistical analyses were performed to conclude about the relationship between fish weight and price. The study indicates that pricing of every fish species does not depend solely on their weight. Weight plays important role to determine the price of few fish species such as Liza persia, Lates calcarifer, Wallago attu, Ompok pabo and Mystus tengara. But, the price of small indigenous fishes like Chanda nama, Colisa fasciata, Harpadon nehereus, Monopterus cuchia, Rhingomugil corsula, Sperata aor and Puntius puntio does not depend on the weight of individual fish. Seasonal availability, taste, consumer’s personal preference have important role to determine fish price.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"72 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77023298","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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