Proceedings - Royal Society of Edinburgh. Section B: Natural environment最新文献

New developments in ultrasonic fish tracking. 超声鱼类跟踪技术的新进展。

Proceedings - Royal Society of Edinburgh. Section B: Natural environment Pub Date : 1976-01-01 DOI: 10.1017/s0308211300002590

A H Young, P Tytler, F G Holliday

引用次数: 8

Rumen function in red deer, hill sheep and reindeer in the scottish highlands. 苏格兰高地马鹿、山羊和驯鹿的瘤胃功能。

Proceedings - Royal Society of Edinburgh. Section B: Natural environment Pub Date : 1976-01-01 DOI: 10.1017/s0308211300002620

P N Hobson, S O Mann, R Summers, B W Staines

{"title":"Rumen function in red deer, hill sheep and reindeer in the scottish highlands.","authors":"P N Hobson, S O Mann, R Summers, B W Staines","doi":"10.1017/s0308211300002620","DOIUrl":"https://doi.org/10.1017/s0308211300002620","url":null,"abstract":"Red deer, sheep and reindeer grazing on their normal hill ranges were examined at intervals over a period of four years. Samples from the digestive tract were taken at different seasons and processed in the field. The Red deer and reindeer were killed before samples were taken; rumen samples from the sheep were taken by stomach tube, but a number of animals were also killed at different seasons to correlate stomach tube and whole rumen samples. The animals sampled were representative of the general condition of the herds. Examinations were made for parasites and any pathological conditions. In most instances parasitic infections were slight. Apparent seasonal changes were found in the compositions of the diets. The Red deer and sheep ate principally heather and grass, the proportion of heather increasing in the winter. The reindeer ate mainly grass in the summer, with lichens and grass forming the winter diet, and these animals seemed to have a higher nutritional status in the winter than did the other two species. The weights of the animals and of their rumen contents, the concentrations of rumen ammonia and volatile fatty acid, and the rates at which different dietary components were fermented are recorded. Rumen fermentation was low in winter and the diets were generally inadequate for the animals. A lack of nitrogen seemed to be a major factor. Some data on caecal contents are also given.","PeriodicalId":76349,"journal":{"name":"Proceedings - Royal Society of Edinburgh. Section B: Natural environment","volume":"75 3","pages":"181-98"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0308211300002620","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11233839","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: 24

Rumen micro-organisms in red deer, hill sheep and reindeer in the scottish highlands. 苏格兰高地马鹿、山羊和驯鹿瘤胃微生物。

Proceedings - Royal Society of Edinburgh. Section B: Natural environment Pub Date : 1976-01-01 DOI: 10.1017/s0308211300002619

P N Hobson, S O Mann, R Summers

{"title":"Rumen micro-organisms in red deer, hill sheep and reindeer in the scottish highlands.","authors":"P N Hobson, S O Mann, R Summers","doi":"10.1017/s0308211300002619","DOIUrl":"https://doi.org/10.1017/s0308211300002619","url":null,"abstract":"The micro-organisms in rumen samples from Red deer, hill sheep and reindeer grazing their natural pastures in the Scottish Highlands were examined at different seasons over a number of years. The total counts of bacteria and protozoa varied with the seasons, and were lowest in winter when fermentative activity was also at its lowest. As is usual in roughage-fed ruminants, viable counts were only a very small proportion of the total counts. The reindeer rumens had the highest concentrations of bacteria. There were no consistent differences in the types of bacteria between seasons, but although there were no bacteria peculiar to any animal species the balance of predominant types varied between the species. The principal types of bacteria were similar to those found in domesticated ruminants. The numbers of protozoa in the Red deer were higher than those in the sheep, and the concentrations in reindeer were higher than those generally reported for domesticated cattle or sheep. A number of species of protozoa were found in each animal and the predominant species differed in the different animals.","PeriodicalId":76349,"journal":{"name":"Proceedings - Royal Society of Edinburgh. Section B: Natural environment","volume":"75 3","pages":"171-80"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0308211300002619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12164467","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: 25

Production of larval tanypodinae (Insecta: Chironomidae) in the mud at Loch Leven, Kinross. 金罗斯利文湖淤泥中爪蛾幼虫的生产(昆虫纲:手蛾科)。

Proceedings - Royal Society of Edinburgh. Section B: Natural environment Pub Date : 1976-01-01 DOI: 10.1017/s0308211300002607

W N Charles, K East, T D Murray

引用次数: 10

A preliminary investigation of the effects of salinity on the bacterial flora of the Tay estuary. 盐度对泰河口细菌区系影响的初步研究。

Proceedings - Royal Society of Edinburgh. Section B: Natural environment Pub Date : 1975-01-01 DOI: 10.1017/s0308211300002565

R A Herbert

引用次数: 0