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BENEFICIAL IMPACTS ON IMMUNE RESPONSES AND DISEASE RESISTANCE OF WHITELEG SHRIMP (Litopenaeus vannamei) FED DIETARY HERBAL EXTRACTS 膳食草本植物提取物对白对虾（Litopenaeus vannamei）免疫反应和抗病能力的有益影响

Helix Pub Date : 2024-01-05 DOI: 10.59411/jvrfxx80

Robert Mutunga

{"title":"BENEFICIAL IMPACTS ON IMMUNE RESPONSES AND DISEASE RESISTANCE OF WHITELEG SHRIMP (Litopenaeus vannamei) FED DIETARY HERBAL EXTRACTS","authors":"Robert Mutunga","doi":"10.59411/jvrfxx80","DOIUrl":"https://doi.org/10.59411/jvrfxx80","url":null,"abstract":"The present study was conducted to determine the effective herbal extracts of Phyllanthus urinaria and Combretum quadrangulare incorporated into the diets on the health of whiteleg shrimp (Litopenaeus vannamei). A commercially available feed diet was incorporated with a concentration of 1% P.urinaria, 1% C.quadrangulare,1% of a mixture of both 1% P. urinaria and 1% C. quadrangulare Kurz (experimental diets), and no herbal extract (control treatment). Shrimps (1.05±0.33 g) in triplicate groups were fed with the supplemented diets for 4 weeks in a 500 L tank with a stocking density of 70 shrimp/tank. Hematological and immunological parameters (Total hemocyte count, granular cells, hyaline cells, phenoloxidase activity-PO, and immune gene expressions) were evaluated after the feeding trial. The results showed that after 4 weeks of dietary herbal supplementation of 1% P. urinaria (PUE), and 1% mixture of P. urinaria and C. quadrangulare (PUE-CQE) significantly enhanced hematological and immunological parameters (total hemocyte count, granular and hyaline cells, phenoloxidase, lysozyme, and Penaeidin-3). After being challenged against V. parahaemolyticus, cumulative mortality of shrimp in treatment of a 1% mixture of P. urinaria and C. quadrangulare (PUE-CQE) was lower compared to the positive control at 43.6% and 66.7% respectively and the difference was statistically significant (p<0.05). Dietary herbal-supplemented treatments of 1% CQE and 1% PUE were slightly lower than the positive control at 55.6% and 59.5% respectively hence no significant difference (p>0.05). This shows that all the herbal treatments lowered the susceptibility and increased protection against V. parahaemolyticus compared to the positive control. In summary, the results indicate that P. urinaria and C. quadrangulare dietary herbal extracts have beneficial impacts on immune responses and disease resistance in whiteleg shrimp (Litopenaeus vannamei) against V. parahaemolyticus.","PeriodicalId":502758,"journal":{"name":"Helix","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139381001","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}

引用次数: 0

Assessment of motorized commercial gillnet fishery of the three commercially important fishes in Lake Tana, Ethiopia 埃塞俄比亚塔纳湖三种重要商业鱼类的机动商业刺网渔业评估

Helix Pub Date : 2023-12-22 DOI: 10.59411/230baq58

Behan Mohammed, Martin De Graaf, Leo Nagelkerke, M. Mingist, W. Anteneh

{"title":"Assessment of motorized commercial gillnet fishery of the three commercially important fishes in Lake Tana, Ethiopia","authors":"Behan Mohammed, Martin De Graaf, Leo Nagelkerke, M. Mingist, W. Anteneh","doi":"10.59411/230baq58","DOIUrl":"https://doi.org/10.59411/230baq58","url":null,"abstract":"This study was conducted from July 2010 to June 2011 to assess the status of motorized commercial gillnet fishery of the three commercially most important fishes in Lake TanaLabeobarbusspp., Oreochromisniloticus(Nile tilapia) and Clariasgariepinus (African catfish). Catches were monitored daily and additional information on number of gillnets used, mesh size of gill nets and location of fishing grounds were collected. Data on the Labeobarbus species composition were collected 3 days per month. The total fish yield from the main fishing grounds of the commercial fishery was 238 metric tons/year. The catch of tilapia was 71%, that of catfish 18% and that of Labeobarbus 11% of the total catch. Peak production was from March - May 2011. Most effort (80%) was allocated to the North Eastern Floodplain (NEFP). The total number of gillnets set and boat trips made were 85,943 and 3104, respectively, which is much higher than reported previously. Consequently, the Catch per Unit effort (CpUE; kg/trip) of the 2010/2011 production year was with 64.7 ± 3 (95% CL) kg much lower than reported previously. The CpUE of all three fish taxa was lower than previously reported, but especially the LabeobarbusCpUE was much lower than before (6.1 kg). An integrated management plan and research program for the Lake Tana basin is urgently required to prevent the collapse of an important fishery and the extinction of the only known cyprinid species flock in the world.","PeriodicalId":502758,"journal":{"name":"Helix","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164745","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}

引用次数: 0

Fish Resource Survey in Benishangul-Gumuz Regional State based on Fish Resource Survey in Benishangul-Gumuz Regional State 贝尼山古尔-古穆兹地区州鱼类资源调查基于贝尼山古尔-古穆兹地区州鱼类资源调查

Helix Pub Date : 2023-12-22 DOI: 10.59411/6gcy3487

Hussein Abegaz, Alayu Yalew, Ermias Mengistu

{"title":"Fish Resource Survey in Benishangul-Gumuz Regional State based on Fish Resource Survey in Benishangul-Gumuz Regional State","authors":"Hussein Abegaz, Alayu Yalew, Ermias Mengistu","doi":"10.59411/6gcy3487","DOIUrl":"https://doi.org/10.59411/6gcy3487","url":null,"abstract":"The Benshangul Gumuz Regional State has ample natural resources; water bodies constitute perennial and intermittent rivers, reservoirs and flood plains with diversified fish species. The fishery resource has been exploited for centuries mainly by indigenous Gumuz and Berta peoples. The total annual harvestable fish from major Rivers is estimated to be 2400 tons/yr and River Abay covers 70% of the region’s total potential. The catch has never been recorded systematically and exact data are not known. However, the rural household based socio-economic survey conducted in 2006 indicated that from all sampled 150 Kebeles, 132 Kebeles (88%) used fish from the rivers. The survey reveals also that 70-83% of 20 Kebeles, 50-70% of 10 Kebeles and 10-45% of 19 Kebeles population have access for fishing at the nearby rivers. The whole population of Mandura and Sirba Abay Woredas and 83% of the population in 36 Kebeles of Maokomo, Guba, Bulen and Kemashi Woredas used fish for food. The current exploitation level is estimated only at 183 tons/yr. The catches are used mostly for home consumption and rarely sold in marketing places as fresh and/or dried when the production exceeds the needs of the family. Along the river coastal areas per capita consumption of fish amongst the peoples reaches about 22 kg/person/yr. Fishes are of special significance for food security in the region, as all the fish caught is going to be consumed by local communities.","PeriodicalId":502758,"journal":{"name":"Helix","volume":"10 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139164633","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}

引用次数: 0

Survey on fish diversity, resource potential and current production level ofmajor rivers in the Benishangul Gumuz Region; Ethiopia 埃塞俄比亚贝尼山古尔古穆兹地区主要河流的鱼类多样性、资源潜力和现有产量调查

Helix Pub Date : 2023-12-22 DOI: 10.59411/n53hz968

Alayu Yalew

{"title":"Survey on fish diversity, resource potential and current production level ofmajor rivers in the Benishangul Gumuz Region; Ethiopia","authors":"Alayu Yalew","doi":"10.59411/n53hz968","DOIUrl":"https://doi.org/10.59411/n53hz968","url":null,"abstract":"With an estimated total population of 667,049 people, the region is situated at the lower fresh water reaches of the Abay basin. The rivers mainly grouped as Flood Rivers, where there are extremes of annual fluctuation in water level from severe flood to sometimes complete desiccation in dry season. There exists also considerable difference in numbers of species inhabiting various river systems attributed to the size of the river as represented by its basin area or correlated with the length of main channel or stream order. Five major rivers of the basin were chosen purposely. Sampling was made during 2011 and gillnets of different mesh sizes were used. For the estimation of the potential fish yield of each river, the simplest model relating catch and river length was used. Compared to the other rivers, the diversity of fish in Dabus River was lower. Totally 29 commercially important fish species,grouped in to 11 families, has been known to present. The dominant family in these river systems is Cyprinidae with a diversity of 9 species. Current fish production in the region is estimated only as 183 tons/yr. The estimated total fish production potentials of sampled rivers is found to be 2,400 tons/yr indicating that there is the possibility to increase the current level of production more than 13 times. Inaddition, the exploitation is limited to subsistence level. The most potential river in the region is Abay with an estimated potential of 1680 tons/year and Anger contributes the least potential.","PeriodicalId":502758,"journal":{"name":"Helix","volume":"118 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139163994","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}

引用次数: 0

Assessment on physical activity involvement of university students with special needs: a case study in some selected higher institutions of Ethiopian 对有特殊需要的大学生参与体育活动情况的评估：埃塞俄比亚部分高等院校的案例研究

Helix Pub Date : 2023-12-13 DOI: 10.59411/ae1sxr38

E. Gebeyehu, Huluager Abebe, Wubadis Tekletadik

{"title":"Assessment on physical activity involvement of university students with special needs: a case study in some selected higher institutions of Ethiopian","authors":"E. Gebeyehu, Huluager Abebe, Wubadis Tekletadik","doi":"10.59411/ae1sxr38","DOIUrl":"https://doi.org/10.59411/ae1sxr38","url":null,"abstract":"Background: Physical activity is very important for every person regardless of his/her age, gender, race, economic status, as well as physical ability, or disability. People, particularly students with special needs are usually perceived by societies as disadvantaged groups (Block, 1992). Hence, they are in a position of missing some economic, political, and social benefits including the right to access equitable and quality of PA. Objectives: the purpose of this study was to assess students with visually impaired and physical disabilities' engagement in physical activity. Methods: in this study qualitative method was employed. A case study research design was employed in this research. Study area: The study was conducted on 3 selected universities, Ethiopia. The selected universities are Debre Berhan, Addis Ababa and kotbea metropolitan universities. Sample: In this research sample of students with special need from all universities main and sub campus ‘was selected by available sampling technique and also responsible head of institutions was selected by purposive sampling technique. The study utilized three data gathering techniques observation, interview and focus group discussion. Qualitative thematic case analysis was employed to analyze the data. Outcome: the finding of the study reveals Ramps, Stairs, Doors, Signage and Flooring of buildings are so poor to allow PA for SWSN. University students with special need have less time engagement in PA (their involvement in PA is so minimal) and University students with special need have interest to engage in PA but environmental and social barriers inhabit them form engagement of PA. Finally, recommendation was forwarded for three universities stakeholders based on the major finding of the research.","PeriodicalId":502758,"journal":{"name":"Helix","volume":"211 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139181273","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}

引用次数: 0