American Journal of Zoology最新文献

{"title":"Performance Evaluation of Lohman Brown Commercial Layer Chicken Breeds Under On-Station Management at Pawe, Benishangul Gumuz, Ethiopia","authors":"H. Kidie, M. Alebel, Misbah Abdo","doi":"10.11648/j.ajz.20240702.11","DOIUrl":"https://doi.org/10.11648/j.ajz.20240702.11","url":null,"abstract":"This study was undertaken to evaluate the performance of Lohman Brown under on-station conditions at Pawe Agricultural Research Center. To evaluate the breed production performance and to generate information for private commercial farms and multiplication centers. A total of 100 (sixty-day-old) chicks and commercial layer feed were purchased from Alema poultry farm in Bishoftu. Vaccinations were administered to the chicks while bio-security measures were employed throughout the experimental period (83 weeks). Daily feed intake, body weight, feed conversion rate, egg production, egg weight, egg mass, and mortality, were recorded. Data were analyzed using descriptive statistics free R-4.0.4 software. Average feed intake during the growing period (10-20 weeks) 59.29g/head and in the layer period (21-72weeks) 117.26g/head/day. The average feed conversion rate at12, 16 and 20weeks of age was 8.85, 8.23 and 7.35 respectively. Average body weight at age at first egg lay and peak egg production were 1368.6 and 1553.9g/head respectively. Average daily weight gain at 10-12, 12-16, and 16- 20 weeks of age was 5.43, 7.22 and 11.09g/bird respectively. Age at first and 5% egg-laying were recorded at the beginning of 21weeks (141days). Age at 50% and peak egg production were recorded at 22 weeks (151 days) and 36weeks. The average HHEP (90.71) and HDEP (92.03) were recorded at peak production, while the overall percentage of lay from 21-72(52) weeks of age were HHEP (74.77%) and HDEP (78.28%). The total amount of egg production from 21-72(52) weeks of age in terms of HHEP and HDEP was 272.2 and 284.93egg/hen/year. Average egg weight at age at first egg lay, 50% egg lay and peak egg production were 47.43, 51.5 and 57.03g. Overall mean egg weight from 21-72(52) weeks of age was 57.81g. The average daily egg mass at the age of first egg lay, 50% egg lay and peak egg production were 7.59, 25.68, and 52.48g. On the other hand, the overall mean daily egg mass from 21-72(52) weeks of age was 45.38g. The average feed conversion rate and feed conversion efficiency for egg mass from 21-72 weeks were 2.64 and 0.387. There was no mortality record up to 28 weeks but, the overall mortality rate was 10% up to 83 weeks. The higher egg production and lower mortality record showed that the breed is adapted in the study area. Lohman Brown is recommended for users with basic input packages and on-farm evaluation of chickens should be done.","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140715042","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}

{"title":"A Survey on Major Infertility Causes in Crossbred Dairy Cattle Farms in Nyala City - South Darfur State - Sudan","authors":"Hamza Abdalla Eltahir, Hashim Abdurahman Ali, Fathi Abdallah Mohammed, HuiamAlhussien Mohammed, AbdurazigAbaker Mohamed, Osman Omer Eltgani, Norasham Saleh Yahia, Asha Adaw Burma, Yosra Mohamed Hassan","doi":"10.11648/j.ajz.20240701.12","DOIUrl":"https://doi.org/10.11648/j.ajz.20240701.12","url":null,"abstract":"","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"48 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140498942","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}

{"title":"Behavioural Monitoring and Threats Assessment of Ibisbill (Ibidorhynchastruthersii) in the Wintering Site, East Rapti River, Hetauda, Nepal","authors":"Nahakul Bhusal, Sneha Paudel, Pooja Timilsina","doi":"10.11648/j.ajz.20240701.11","DOIUrl":"https://doi.org/10.11648/j.ajz.20240701.11","url":null,"abstract":"","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"95 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139535425","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}

{"title":"Adoption of Cross Breed Cows Distributed by Adami Tullu Agricultural Research Center in East Shewa and West Arsi Zones, Oromia Region, Ethiopia","authors":"Asfaw Negesse Senbeta, Yassin Esmael Ahmed","doi":"10.11648/j.ajz.20230603.12","DOIUrl":"https://doi.org/10.11648/j.ajz.20230603.12","url":null,"abstract":"","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139209456","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}

{"title":"Effective Management Strategies for Spotted Deer at the National Zoo in Bangladesh","authors":"A. K. M. Baharul Islam Talukder, Md. Rafiqul Islam, Al Faruk, Fouzia Akhter","doi":"10.11648/j.ajz.20230603.11","DOIUrl":"https://doi.org/10.11648/j.ajz.20230603.11","url":null,"abstract":"","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139214887","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}

{"title":"Taxonomic Reinvestigation of <i>Hynobius lichenatus</i>: Description of a New Species and Resurrection of a Previously Described Species from Eastern Japan","authors":"Hirotaka Sugawara, A. Fujiwara, Atsuki Azuma, Ryuichi Sugawara, Makoto Kuraishi, Masahiro Nagano","doi":"10.11648/j.ajz.20230602.12","DOIUrl":"https://doi.org/10.11648/j.ajz.20230602.12","url":null,"abstract":"","PeriodicalId":502563,"journal":{"name":"American Journal of Zoology","volume":"26 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139280036","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}