The presence of Dichlorvos in aquatic environment posed potential toxic effects on fish. Effects of Dichlorvos and ameliorative potential of Moringa oleifera leaves on Clarias gariepinus juveniles was investigated. The fish were exposed to varying concentrations (0.00, 0.50, 0.75, 1.00, 1.50 and 2.00 mg/l) of Dichlorvos for 96 h, 1/10th of 96 h LC 50 (1.75 mg/L) and fed on M. oleifera leaves (0, 5 and 10%) for 28 days. After the experiments, blood of the fish was assayed for haematological variables, while gills and liver were assayed for histopathological damages. The levels of erythrocytes and leucocytes in the exposed groups decreased (P <0.05) and increased (P<0.05) respectively compared to control, but, elevated and reduced significantly (P<0.05) in fish fed on 5% M. oleifera leaf respectively. Histopathological alterations such as lamellar fusion, oedema and necrosis were observed in the gills, while vacuolation, fibrosis, and necrosiswere revealed in the liver of Dichlorvos-exposed fish compared to control. However, the severity of damage reduced in the group fed on 5 % M. oleifera leaves. These results imply that 5% M. oleifera leaves in fish feed is capable of ameliorating the toxic effects of Dichlorvos on C. gariepinus . Key Words : Amelioration, Dichlorvos, haematology, histology, Moringa oleifera leaves
敌敌畏在水生环境中的存在对鱼类具有潜在的毒性作用。研究了敌敌畏对辣木叶片对Clarias gariepinus幼体的影响及其改良潜力。将不同浓度(0.00、0.50、0.75、1.00、1.50和2.00 mg/l)的敌敌畏分别暴露于96 h和96 h lc50浓度(1.75 mg/l)的1/10中，分别以0、5%和10%的敌敌畏叶片为食28 d。实验结束后，对鱼的血液进行血液学变量分析，同时对鳃和肝脏进行组织病理学损伤分析。与对照组相比，各暴露组红细胞和白细胞水平分别降低(P<0.05)和升高(P<0.05)， 5%油葵叶饵料组红细胞和白细胞水平分别显著升高和降低(P<0.05)。与对照组相比，暴露于敌敌畏的鱼在鳃中观察到组织病理学改变，如板层融合、水肿和坏死，而在肝脏中显示空泡化、纤维化和坏死。然而，在食用5%油橄榄叶的组中，损害的严重程度有所降低。结果表明，在鱼饲料中添加5%的油鸡叶可改善敌敌畏对加里滨弓形虫的毒性作用。关键词:改良，敌敌畏，血液学，组织学，辣木叶
{"title":"Toxicological effects of dichlorvos on haematology and histological changes in Clarias gariepinus juveniles and ameliorative potentials of Moringa oleifera leaves","authors":"S. Abdulkareem, O. Oyediran, R. Shaibu, M. Raji","doi":"10.4314/JAS.V32I2.9","DOIUrl":"https://doi.org/10.4314/JAS.V32I2.9","url":null,"abstract":"The presence of Dichlorvos in aquatic environment posed potential toxic effects on fish. Effects of Dichlorvos and ameliorative potential of Moringa oleifera leaves on Clarias gariepinus juveniles was investigated. The fish were exposed to varying concentrations (0.00, 0.50, 0.75, 1.00, 1.50 and 2.00 mg/l) of Dichlorvos for 96 h, 1/10th of 96 h LC 50 (1.75 mg/L) and fed on M. oleifera leaves (0, 5 and 10%) for 28 days. After the experiments, blood of the fish was assayed for haematological variables, while gills and liver were assayed for histopathological damages. The levels of erythrocytes and leucocytes in the exposed groups decreased (P <0.05) and increased (P<0.05) respectively compared to control, but, elevated and reduced significantly (P<0.05) in fish fed on 5% M. oleifera leaf respectively. Histopathological alterations such as lamellar fusion, oedema and necrosis were observed in the gills, while vacuolation, fibrosis, and necrosiswere revealed in the liver of Dichlorvos-exposed fish compared to control. However, the severity of damage reduced in the group fed on 5 % M. oleifera leaves. These results imply that 5% M. oleifera leaves in fish feed is capable of ameliorating the toxic effects of Dichlorvos on C. gariepinus . Key Words : Amelioration, Dichlorvos, haematology, histology, Moringa oleifera leaves","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"31 1","pages":"303-315"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83654520","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. Ajagbe, D. Odulate, O. Olawuyi, M. T. Ojubolamo, T. Adekanmbi, B. Olatunji, A. T. Kareem, O. Ogunwale
Gillnet selectivity is a management tool that is used to regulate the mesh size used for exploitation of fisheries resources in aquatic ecosystems. This is done to prevent overfishing of various types. Gillnet selectivity of Sarotherodon galilaeus of Asejire Lake is estimated in this study. Three mesh sizes 50.8 mm, 63.5 mm and 76.2 mm were found used predominantly in Asejire Lake. These mesh sizes caught various sizes of fish within the range of 11–24 cm. The optimum lengths for mesh sizes 50.8 mm, 63.5 mm and 76.2 mm were 15.09 cm, 18.86 cm and 22.63 cm respectively. Therefore, 63.5 mm mesh size is recommended as the appropriate mesh size for exploitation of S. galilaeus of Asejire Lake. Key Words: Gillnet, selectivity, mesh sizes, overfishing, Sarotherodon galilaeus, Asejire Lake
{"title":"Gillnet selectivity of Sarotherodon galilaeus of Asejire lake, Oyo state, Nigeria","authors":"S. Ajagbe, D. Odulate, O. Olawuyi, M. T. Ojubolamo, T. Adekanmbi, B. Olatunji, A. T. Kareem, O. Ogunwale","doi":"10.4314/jas.v32i2.6","DOIUrl":"https://doi.org/10.4314/jas.v32i2.6","url":null,"abstract":"Gillnet selectivity is a management tool that is used to regulate the mesh size used for exploitation of fisheries resources in aquatic ecosystems. This is done to prevent overfishing of various types. Gillnet selectivity of Sarotherodon galilaeus of Asejire Lake is estimated in this study. Three mesh sizes 50.8 mm, 63.5 mm and 76.2 mm were found used predominantly in Asejire Lake. These mesh sizes caught various sizes of fish within the range of 11–24 cm. The optimum lengths for mesh sizes 50.8 mm, 63.5 mm and 76.2 mm were 15.09 cm, 18.86 cm and 22.63 cm respectively. Therefore, 63.5 mm mesh size is recommended as the appropriate mesh size for exploitation of S. galilaeus of Asejire Lake. Key Words: Gillnet, selectivity, mesh sizes, overfishing, Sarotherodon galilaeus, Asejire Lake","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"75 1","pages":"267-274"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87419997","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 influence of ethanolic stem bark extract of Ackee Apple ( Blighia sapida ) was assessed on hepatic and renal functions in juvenile Clarias gariepinus . Fish were exposed to graded concentrations (1.6, 3.2, 6.4 and 12.8 g/L) of the extract for 21 days. The control group had 0.00g/L extract content. 10 fish were used per treatment and each treatment was replicated three times. Physico-chemical parameters (pH, dissolved oxygen and temperature) were monitored throughout exposure period. At the end of the experiment, blood samples were collected and assessed for some indices of hepatic and renal functions. Results showed that extract at 1.6 g/L did not induce significant (p>0.05) alternation in the serum activities of total protein, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and uric acid when compared with the control. However, at higher extract concentrations the effects increased significantly (p<0.05) with increasing concentrations of extract. The highest effects were observed at 12.8 g/L having total protein of 8.51mmol/L, AST (14.39 mmol/L), ALT (16.99 mmol/L), ALP (66.0 mmol/L), uric acid (0.68 mg/L) and creatinine (20.7mg/L). Conclusively, the extract may be considered safe at lower concentration (1.6 g/L) but may potentiate serious biochemical alteration if continuously applied at 12.8 g/L. Key Words : Ackee apple, toxicity, kidney/liver enzymes, catfish
{"title":"Effects of ethanolic extracts of Ackee apple ( Blighia sapida ) on biochemical parameters of Clarias gariepinus juveniles","authors":"M. U. Effiong, M. E. Onyeze","doi":"10.4314/jas.v32i2.10","DOIUrl":"https://doi.org/10.4314/jas.v32i2.10","url":null,"abstract":"The influence of ethanolic stem bark extract of Ackee Apple ( Blighia sapida ) was assessed on hepatic and renal functions in juvenile Clarias gariepinus . Fish were exposed to graded concentrations (1.6, 3.2, 6.4 and 12.8 g/L) of the extract for 21 days. The control group had 0.00g/L extract content. 10 fish were used per treatment and each treatment was replicated three times. Physico-chemical parameters (pH, dissolved oxygen and temperature) were monitored throughout exposure period. At the end of the experiment, blood samples were collected and assessed for some indices of hepatic and renal functions. Results showed that extract at 1.6 g/L did not induce significant (p>0.05) alternation in the serum activities of total protein, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and uric acid when compared with the control. However, at higher extract concentrations the effects increased significantly (p<0.05) with increasing concentrations of extract. The highest effects were observed at 12.8 g/L having total protein of 8.51mmol/L, AST (14.39 mmol/L), ALT (16.99 mmol/L), ALP (66.0 mmol/L), uric acid (0.68 mg/L) and creatinine (20.7mg/L). Conclusively, the extract may be considered safe at lower concentration (1.6 g/L) but may potentiate serious biochemical alteration if continuously applied at 12.8 g/L. Key Words : Ackee apple, toxicity, kidney/liver enzymes, catfish","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"14 1","pages":"317-322"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87742837","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}
Levels of antioxidants (Catalase, Superoxide dismutase and Glutathione-S-Transferase) in plasma of Clarias gariepinus reared in grow-out concrete tanks and earthen ponds in three Agricultural Zones of Lagos State were investigated. Six farms namely, TEM, TRA (Eastern zone), BLU, TIM (Western zone), CHA, MOY (Far Eastern zone) and control farm, located in NIOMR, Badore. Antioxidants were determined spectrophotometrically to evaluate oxidative stress in these facilities. Sixty-four blood samples were collected from juveniles and adults of catfish (eight fish per farm), reared in these farms for six months. Blood samples were analyzed with Randox diagnostic test kits. Results from antioxidants analyses showed that values of Catalase, Superoxide dismutase and Glutathione-S-transferase in plasma of C. gariepinus (juveniles and adults) from control farm ranged from 0.60 – 0.90 Umg/protein; 0.10 – 0.58 Umg/protein and 0.20 – 0.42 Umg/protein respectively. In juvenile and adult fish reared in concrete and earthen ponds, the catalase reduced significantly (P<0.05) in all farms when compared to control farm. Moreover, Superoxide dismutase and Glutathione transferase were equally elevated in other farms when compared to control. These alterations were more pronounced in fish reared in MOY and TEM fish farms than other farms. This indicates that fish in MOY and TEM farms were more stressed than fish in other farms when compared to control in rearing facilities. Key Words : Stress, antioxidants, catfish, earthen ponds and concrete tanks
研究了拉各斯州3个农业区生长型混凝土池和土池饲养的加里亚鱼血浆中抗氧化剂(过氧化氢酶、超氧化物歧化酶和谷胱甘肽- s -转移酶)水平。6个农场分别是TEM, TRA(东区)，BLU, TIM(西区)，CHA, MOY(远东区)和对照农场，位于Badore NIOMR。用分光光度法测定抗氧化剂以评价这些设施中的氧化应激。从在这些养殖场饲养6个月的幼鱼和成年鲶鱼(每个养殖场8条鱼)中收集了64份血液样本。采用Randox诊断试剂盒对血样进行分析。抗氧化剂分析结果表明，对照猪场家鸡幼虫和成虫血浆过氧化氢酶、超氧化物歧化酶和谷胱甘肽- s -转移酶含量在0.60 ~ 0.90 μ g/蛋白之间;分别为0.10 ~ 0.58微克/蛋白和0.20 ~ 0.42微克/蛋白。在混凝土池和土池养殖的幼鱼和成鱼中，各养殖场过氧化氢酶均显著低于对照(P<0.05)。此外，与对照组相比，其他农场的超氧化物歧化酶和谷胱甘肽转移酶也同样升高。这些变化在MOY和TEM养殖场饲养的鱼中比其他养殖场更明显。这表明，与饲养设施中的对照相比，MOY和TEM养殖场的鱼比其他养殖场的鱼受到的压力更大。关键词:应激;抗氧化剂;鲶鱼
{"title":"Antioxidants in the plasma of african catfish ( Clarias gariepinus ) juveniles and adults reared in earthen ponds and concrete tanks","authors":"N. Achilike, L. Chukwu, P. Anyanwu","doi":"10.4314/JAS.V32I2.2","DOIUrl":"https://doi.org/10.4314/JAS.V32I2.2","url":null,"abstract":"Levels of antioxidants (Catalase, Superoxide dismutase and Glutathione-S-Transferase) in plasma of Clarias gariepinus reared in grow-out concrete tanks and earthen ponds in three Agricultural Zones of Lagos State were investigated. Six farms namely, TEM, TRA (Eastern zone), BLU, TIM (Western zone), CHA, MOY (Far Eastern zone) and control farm, located in NIOMR, Badore. Antioxidants were determined spectrophotometrically to evaluate oxidative stress in these facilities. Sixty-four blood samples were collected from juveniles and adults of catfish (eight fish per farm), reared in these farms for six months. Blood samples were analyzed with Randox diagnostic test kits. Results from antioxidants analyses showed that values of Catalase, Superoxide dismutase and Glutathione-S-transferase in plasma of C. gariepinus (juveniles and adults) from control farm ranged from 0.60 – 0.90 Umg/protein; 0.10 – 0.58 Umg/protein and 0.20 – 0.42 Umg/protein respectively. In juvenile and adult fish reared in concrete and earthen ponds, the catalase reduced significantly (P<0.05) in all farms when compared to control farm. Moreover, Superoxide dismutase and Glutathione transferase were equally elevated in other farms when compared to control. These alterations were more pronounced in fish reared in MOY and TEM fish farms than other farms. This indicates that fish in MOY and TEM farms were more stressed than fish in other farms when compared to control in rearing facilities. Key Words : Stress, antioxidants, catfish, earthen ponds and concrete tanks","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"9 1","pages":"231-239"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82224536","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}
P. Samuel, O. P. Abiola, O. F. Arimoro, A. Ayanwale, A. Muhammed, Y. I. Auta
The effects of lead nitrate on glutathione (GSH) production levels in Clarias gariepinus post juveniles were investigated. The 96 hours LC 50 of the toxicant was determined. Six samples of the fish were exposed to sub-lethal concentrations of 0 mg/L, 28 mg/L, 43 mg/L and 57 mg/L with replicate in each case for a period of 28 days. Two samples of the fish were randomly selected from the treatments and control for the bioassay of GSH production levels in the kidney, liver and gill of the fish on the 14th and 28th day respectively. The results showed that 96 hours LC 50 for C. gariepinus exposed to lethal concentrations of lead nitrate was 284.189 mg/L. The GSH production levels were significantly lower (P≤0.05) in the kidney of the fish exposed to treatments 28 mg/L and 43 mg/L and in the liver of the fish exposed in all the treatments on both days 14 and 28, respectively. The GSH production levels were also significantly lower in the gill of the fish exposed in all the treatments. The liver of C. gariepinus exhibited a better control of the toxicant and therefore, a better biomarker of oxidative stress due to lead nitrate. Key Words : Glutathione, lead nitrate, 96 hours LC 50 , oxidative stress, Clarias gariepinus
研究了硝酸铅对加里平克拉尾鱼幼鱼谷胱甘肽(GSH)产生水平的影响。测定毒剂96小时lc50。6个鱼样本分别暴露于0 mg/L、28 mg/L、43 mg/L和57 mg/L的亚致死浓度中，每组重复28天。在试验第14天和第28天，分别从处理组和对照组中随机抽取2只鱼，测定其肾脏、肝脏和鳃中谷胱甘肽的产生水平。结果表明，硝态铅致死浓度对鸡尾蠓的96 h lc50为284.189 mg/L;28 mg/L和43 mg/L处理鱼的肾脏和肝脏GSH产量在第14天和第28天均显著降低(P≤0.05)。在所有处理中暴露的鱼鳃中GSH的产量水平也显著降低。鸡肝对该毒物的控制较好，因此是硝酸铅氧化应激的较好生物标志物。关键词:谷胱甘肽，硝酸铅，96小时lc50，氧化应激，克拉利亚鱼
{"title":"Effects of lead nitrate on glutathione production levels in Clarias gariepinus (Burchell, 1822) post juveniles","authors":"P. Samuel, O. P. Abiola, O. F. Arimoro, A. Ayanwale, A. Muhammed, Y. I. Auta","doi":"10.4314/JAS.V32I2.1","DOIUrl":"https://doi.org/10.4314/JAS.V32I2.1","url":null,"abstract":"The effects of lead nitrate on glutathione (GSH) production levels in Clarias gariepinus post juveniles were investigated. The 96 hours LC 50 of the toxicant was determined. Six samples of the fish were exposed to sub-lethal concentrations of 0 mg/L, 28 mg/L, 43 mg/L and 57 mg/L with replicate in each case for a period of 28 days. Two samples of the fish were randomly selected from the treatments and control for the bioassay of GSH production levels in the kidney, liver and gill of the fish on the 14th and 28th day respectively. The results showed that 96 hours LC 50 for C. gariepinus exposed to lethal concentrations of lead nitrate was 284.189 mg/L. The GSH production levels were significantly lower (P≤0.05) in the kidney of the fish exposed to treatments 28 mg/L and 43 mg/L and in the liver of the fish exposed in all the treatments on both days 14 and 28, respectively. The GSH production levels were also significantly lower in the gill of the fish exposed in all the treatments. The liver of C. gariepinus exhibited a better control of the toxicant and therefore, a better biomarker of oxidative stress due to lead nitrate. Key Words : Glutathione, lead nitrate, 96 hours LC 50 , oxidative stress, Clarias gariepinus","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"96 1","pages":"223-229"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85304104","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 hydro-environmental characteristics and zooplankton diversity at the Light-house creek were investigated for six months. Variations in water quality parameters were linked with tidal sea water incursion and rainfall/floodwater dynamics. Water and air temperatures were high (>25.8⁰C; >28 ⁰C) and Transparency decreased in the wet months. Salinity values were high (>19 ‰) all through, while the water remained alkaline (≥6.68). Biochemical oxygen demand (4.0-18.0 mg/L), chemical oxygen demand (1.0 and 2.0 mg/L) phosphate (0.06 and 8.40 mg/L) and nitrate showed variations (0.80 mg/L). On the other hand, minimum sulphate value was 224.0 mg/L while silicate values ranged from 2.10 to 4.60 mg/L. Zinc (<0.047 mg/L), Iron (<0.28 mg/L) and copper values (<0.014 mg/L) also varied. The zooplankton spectrum comprised 62.36% Arthropoda, 0.78% Chordata, 0.71% Cnidaria, 35.9%, juvenile stages and 0.95% were from other groups. A total of 49 zooplankton taxa from five different phyla and 18 juvenile stages were identified. Zooplankton biomass in terms of individuals per ml was higher in the dry than wet months. The copepod nauplii, bivalve and zoea larvae were the dorminant juvenile forms. Species richness indices (d) and similarity index were higher in the dry months than the wet months. Key Words : Phytoplankton, juvenile stages, Lagos habour, lagoon, water chemistry, mangrove creek
{"title":"The hydro-environmental conditions and zooplankton of the light house creek, Lagos, Nigeria","authors":"I. Onyema, J. O. Okedoyin","doi":"10.4314/JAS.V32I2.8","DOIUrl":"https://doi.org/10.4314/JAS.V32I2.8","url":null,"abstract":"The hydro-environmental characteristics and zooplankton diversity at the Light-house creek were investigated for six months. Variations in water quality parameters were linked with tidal sea water incursion and rainfall/floodwater dynamics. Water and air temperatures were high (>25.8⁰C; >28 ⁰C) and Transparency decreased in the wet months. Salinity values were high (>19 ‰) all through, while the water remained alkaline (≥6.68). Biochemical oxygen demand (4.0-18.0 mg/L), chemical oxygen demand (1.0 and 2.0 mg/L) phosphate (0.06 and 8.40 mg/L) and nitrate showed variations (0.80 mg/L). On the other hand, minimum sulphate value was 224.0 mg/L while silicate values ranged from 2.10 to 4.60 mg/L. Zinc (<0.047 mg/L), Iron (<0.28 mg/L) and copper values (<0.014 mg/L) also varied. The zooplankton spectrum comprised 62.36% Arthropoda, 0.78% Chordata, 0.71% Cnidaria, 35.9%, juvenile stages and 0.95% were from other groups. A total of 49 zooplankton taxa from five different phyla and 18 juvenile stages were identified. Zooplankton biomass in terms of individuals per ml was higher in the dry than wet months. The copepod nauplii, bivalve and zoea larvae were the dorminant juvenile forms. Species richness indices (d) and similarity index were higher in the dry months than the wet months. Key Words : Phytoplankton, juvenile stages, Lagos habour, lagoon, water chemistry, mangrove creek","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"27 1","pages":"285-301"},"PeriodicalIF":0.0,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80579451","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. Okereke, C. Ezeama, O. Davies, C. D. Ezeonyejiaku
The efficiency of depuration in the removal of microbial load in mangrove oyster (Crassostrea gasar) from a polluted creek in Rivers State, Nigeria using a flow-through method with high loading density was evaluated in this study. Depuration experiments were conducted with cartridge-filtered and UV-light using seawater in segregated plastic tanks at a salinity of 30 ‰, pH of 8.0 and temperature of 29.0 °C. The oysters in segregated tanks were taken at intervals of 24, 48, 72 and 96 hours of depuration and analyzed for microbial load (total hetrotrophic bacteria, total fungi counts, hydrocarbon utilizing bacteria and fungi and feacal coliform counts). Results from the two-way ANOVA showed that time, method and season had significant effect on the microbial counts. At different locations, there was significant difference (P 0.05) on total fungi counts, feacal coliforms and hetrotrophic bacteria was recorded. This study depuration method at the different time interval is recommended.Keywords: Cleansing, contaminants, poisoning, food safety, Crassostrea gasar
{"title":"Effect of depuration on microbial load of mangrove oyster ( Crassostrea gasar ) from a polluted creek in Rivers State, Nigeria","authors":"A. Okereke, C. Ezeama, O. Davies, C. D. Ezeonyejiaku","doi":"10.4314/jas.v32i1a.20","DOIUrl":"https://doi.org/10.4314/jas.v32i1a.20","url":null,"abstract":"The efficiency of depuration in the removal of microbial load in mangrove oyster (Crassostrea gasar) from a polluted creek in Rivers State, Nigeria using a flow-through method with high loading density was evaluated in this study. Depuration experiments were conducted with cartridge-filtered and UV-light using seawater in segregated plastic tanks at a salinity of 30 ‰, pH of 8.0 and temperature of 29.0 °C. The oysters in segregated tanks were taken at intervals of 24, 48, 72 and 96 hours of depuration and analyzed for microbial load (total hetrotrophic bacteria, total fungi counts, hydrocarbon utilizing bacteria and fungi and feacal coliform counts). Results from the two-way ANOVA showed that time, method and season had significant effect on the microbial counts. At different locations, there was significant difference (P 0.05) on total fungi counts, feacal coliforms and hetrotrophic bacteria was recorded. This study depuration method at the different time interval is recommended.Keywords: Cleansing, contaminants, poisoning, food safety, Crassostrea gasar","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"12 1","pages":"193-203"},"PeriodicalIF":0.0,"publicationDate":"2018-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84202229","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}
Preliminary determination of physico-chemical properties of Hayin Danmani stream, Igabi Local Government Area of Kaduna State, Nigeria was conducted in order to determine some physic-chemical parameters concentrations. Two different sampling stations were selected and samples were collected twice a month for three months, Nov 2015-Jan 216, along the course of Hayin Danmani stream. The mean values of pH (7.5±5.6), electrical conductivity (EC143±27.92 μs/cm), total dissolved solids (TDS 1515±54 mg/L) and turbidity (85±74.5 NTU were found to be higher than the recommended limit of World Health Organization (WHO) and Federal Environmental Protection (FEPA) with the exception of dissolved oxygen (DO, 6.5±3.4 mg/L), biochemical demand (BOD, 3±1.06 mg/L) and temperature, which were found to be in lower concentrations and within the recommended limits of FEPA and WHO respectively. The analysis of variance showed no significant difference in the months of November to January (p>0.05). The study revealed that Hayin Danmani Stream was polluted and the receiving river, the primary important streams, ponds and rivers need to be well monitored against all forms of contaminations and thus the impairment of water quality and other important aquatic organisms. Keywords: Water quality, evaluation, pollution, Hanyin Danmani Stream
{"title":"Preliminary assessment of some physico-chemical parameters of Hanyin Danmani stream, Kaduna State, Nigeria","authors":"M. Babatunde, M. Sulaiman","doi":"10.4314/jas.v32i1a.4","DOIUrl":"https://doi.org/10.4314/jas.v32i1a.4","url":null,"abstract":"Preliminary determination of physico-chemical properties of Hayin Danmani stream, Igabi Local Government Area of Kaduna State, Nigeria was conducted in order to determine some physic-chemical parameters concentrations. Two different sampling stations were selected and samples were collected twice a month for three months, Nov 2015-Jan 216, along the course of Hayin Danmani stream. The mean values of pH (7.5±5.6), electrical conductivity (EC143±27.92 μs/cm), total dissolved solids (TDS 1515±54 mg/L) and turbidity (85±74.5 NTU were found to be higher than the recommended limit of World Health Organization (WHO) and Federal Environmental Protection (FEPA) with the exception of dissolved oxygen (DO, 6.5±3.4 mg/L), biochemical demand (BOD, 3±1.06 mg/L) and temperature, which were found to be in lower concentrations and within the recommended limits of FEPA and WHO respectively. The analysis of variance showed no significant difference in the months of November to January (p>0.05). The study revealed that Hayin Danmani Stream was polluted and the receiving river, the primary important streams, ponds and rivers need to be well monitored against all forms of contaminations and thus the impairment of water quality and other important aquatic organisms. Keywords: Water quality, evaluation, pollution, Hanyin Danmani Stream","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"17 1","pages":"33-43"},"PeriodicalIF":0.0,"publicationDate":"2018-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90610180","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 Ashtamudi Lake (Estuary), Kerala, India is the source of livelihood for thousands of fishers and eco-tourism but studies have shown that majority of water resources Kerala are highly polluted. This study therefore assessed some physico-chemical parameters and zooplankton assemblage from comparatively unpolluted and polluted areas in Ashtamudi Lake, Kerala, India. The current study showed the presence of five groups of zooplankton namely: Copepoda (21-26.56%), Rotifera (19.2-24.85%), Cladocera (7.78-24.85%), Ostracoda 11-20.55%) and Insecta (8-23.22%). Zooplankton taxa composition, distribution and dominance of copepod were closely associated with physico-chemical parameters. The dominance of copepods and low taxa diversity indicates pollution. The control of pollution is recommended to make the Ashtamudi Lake suitable for aquatic life and its importance to the inhabitants of Kerala.Keywords: Zooplankton, community, physico-chemistry parameters, pollution, Ashtamudi Lake
{"title":"Physico-chemical parameters and diversity of zooplankton population in Ashtamudi Lake, Kerala, India","authors":"S. Sahib","doi":"10.4314/JAS.V32I1A.9","DOIUrl":"https://doi.org/10.4314/JAS.V32I1A.9","url":null,"abstract":"The Ashtamudi Lake (Estuary), Kerala, India is the source of livelihood for thousands of fishers and eco-tourism but studies have shown that majority of water resources Kerala are highly polluted. This study therefore assessed some physico-chemical parameters and zooplankton assemblage from comparatively unpolluted and polluted areas in Ashtamudi Lake, Kerala, India. The current study showed the presence of five groups of zooplankton namely: Copepoda (21-26.56%), Rotifera (19.2-24.85%), Cladocera (7.78-24.85%), Ostracoda 11-20.55%) and Insecta (8-23.22%). Zooplankton taxa composition, distribution and dominance of copepod were closely associated with physico-chemical parameters. The dominance of copepods and low taxa diversity indicates pollution. The control of pollution is recommended to make the Ashtamudi Lake suitable for aquatic life and its importance to the inhabitants of Kerala.Keywords: Zooplankton, community, physico-chemistry parameters, pollution, Ashtamudi Lake","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"1 1","pages":"79-85"},"PeriodicalIF":0.0,"publicationDate":"2018-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82948932","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 Ithikkara River, Kerala, India is used for drinking, bathing and fisheries purposes. It is important to have information on the water quality of this river considering its importance to the inhabitants of Kerala. The study therefore determined some physico-chemical parameters and phytoplankton population of Ithikara River. A total of 4 families and 36 genera with Chlorophyceae (15 genera) as dominant group and Desmidiaceae (1 genus) as least group were recorded. The presence of dominant Chlorophyceae, low genera composition, diversity, abundance and distribution of phytoplankton as well as pollution indicator genera (Synedra, Navicula, Nitzschia, Scenedesmus and Anabaena) signifies that Ithikkara River is polluted. Based on these observations, the study recommends the concerted surveillance on, monitoring and evaluation of the Ithikkara River to avoid indiscriminating discharge of effluents from various human activities within and around the river.Keywords: Microalgae, assemblage, water quality, pollution, Ithikkara River
{"title":"Some physico-chemical parameters and phytoplankton biodiversity of Ithikkara River, Kerala, India","authors":"S. Sahib","doi":"10.4314/JAS.V32I1A.7","DOIUrl":"https://doi.org/10.4314/JAS.V32I1A.7","url":null,"abstract":"The Ithikkara River, Kerala, India is used for drinking, bathing and fisheries purposes. It is important to have information on the water quality of this river considering its importance to the inhabitants of Kerala. The study therefore determined some physico-chemical parameters and phytoplankton population of Ithikara River. A total of 4 families and 36 genera with Chlorophyceae (15 genera) as dominant group and Desmidiaceae (1 genus) as least group were recorded. The presence of dominant Chlorophyceae, low genera composition, diversity, abundance and distribution of phytoplankton as well as pollution indicator genera (Synedra, Navicula, Nitzschia, Scenedesmus and Anabaena) signifies that Ithikkara River is polluted. Based on these observations, the study recommends the concerted surveillance on, monitoring and evaluation of the Ithikkara River to avoid indiscriminating discharge of effluents from various human activities within and around the river.Keywords: Microalgae, assemblage, water quality, pollution, Ithikkara River","PeriodicalId":32064,"journal":{"name":"Turkish Journal of Aquatic Sciences","volume":"51 1","pages":"63-69"},"PeriodicalIF":0.0,"publicationDate":"2018-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89894647","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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