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Southern African Journal of Aquatic Sciences最新文献

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REPLY TO COMMENTS BY DR D H R HELLWIG ON PAPERS BY J.U. GROBBELAAR, M.K. SEELY & O.B. KOK 回复Dr . h . hellwig对j.u. grobbelaar, m.k. seely和o.b. kok论文的评论
Southern African Journal of Aquatic Sciences Pub Date : 1989-06-01 DOI: 10.1080/10183469.1989.9631303
J. Grobbelaar
{"title":"REPLY TO COMMENTS BY DR D H R HELLWIG ON PAPERS BY J.U. GROBBELAAR, M.K. SEELY & O.B. KOK","authors":"J. Grobbelaar","doi":"10.1080/10183469.1989.9631303","DOIUrl":"https://doi.org/10.1080/10183469.1989.9631303","url":null,"abstract":"","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114648396","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
THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA 鳟鱼养殖场废水对南非西南开普河中底栖无脊椎动物群落结构的影响
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1995.9631358
C. A. Brown, J. King
{"title":"THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA","authors":"C. A. Brown, J. King","doi":"10.1080/10183469.1995.9631358","DOIUrl":"https://doi.org/10.1080/10183469.1995.9631358","url":null,"abstract":"Summary The south-western Cape is currently responsible for 45% of the total annual trout production in South Africa and further expansion of this industry in the region is likely. A preliminary survey of seven trout farms situated on the upper reaches of rivers in the southwestern Cape was undertaken to determine whether there was a common trend in their effect on the rivers. Results indicated that the impact of the farms on the benthic invertebrate communities of the rivers ranged from mild to severe, based on the degree of change in the structure of the communities from upstream to downstream of the effluent outlets. Those farms situated on mountain streams had the greatest impact and those on the downstream foothill had a lesser impact. The reduced impact in the foothill zone was probably because these reaches were already disturbed by other catchment activities. Of the three farms that were situated on mountain streams and source areas, two used plastic portapools and the third earth dams. There was ...","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116156650","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: 2
CATCHMENT MANAGEMENT PLANNING ADDS VALUE TO THE ENVIRONMENT AGENCY OF ENGLAND AND WALES 集水区管理规划为英格兰和威尔士环境署增加了价值
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1997.9631402
A. Hepworth
{"title":"CATCHMENT MANAGEMENT PLANNING ADDS VALUE TO THE ENVIRONMENT AGENCY OF ENGLAND AND WALES","authors":"A. Hepworth","doi":"10.1080/10183469.1997.9631402","DOIUrl":"https://doi.org/10.1080/10183469.1997.9631402","url":null,"abstract":"Summary This paper aims to show how the Catchment Management Planning (CMP) process is adding value to the Environment Agency through actions in the environment. Examples of these actions are described. The process of producing CMPs is described. Finally, the move from the National Rivers Authority or NRA to the Environment Agency and how these changes will affect the plan process.","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"120 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115839461","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
NEW DISTRIBUTION RECORD FOR CHILOGLANIS BIFURCUS JUBB AND LE ROUX, 1969 IN A TRIBUTARY OF THE CROCODILE RIVER, MPUMALANGA PROVINCE, SOUTH AFRICA 1969年在南非普马兰加省鳄鱼河支流中发现的新分布记录
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1996.9631378
G. Schulz
{"title":"NEW DISTRIBUTION RECORD FOR CHILOGLANIS BIFURCUS JUBB AND LE ROUX, 1969 IN A TRIBUTARY OF THE CROCODILE RIVER, MPUMALANGA PROVINCE, SOUTH AFRICA","authors":"G. Schulz","doi":"10.1080/10183469.1996.9631378","DOIUrl":"https://doi.org/10.1080/10183469.1996.9631378","url":null,"abstract":"Summary A new distribution record for the South African Red Data fish species Chiloglanis bifurcus was found in the Nels River at an altitude of 830 m a.m.s.l. in the Mpumalanga province, South Africa. Previously this species was known to occur between altitudes 900 m and 1200 m a.m.s.l. in the Elands and Crocodile Rivers of the Inkomati River system, as well as in tributaries of these rivers, namely the Gladdespruit, Stadspruit and Ngodwana River. It was also found to occur in the Komati River of the same river system.","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122178350","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
A GEOMORPHOLOGICAL APPROACH TO THE IDENTIFICATION AND CLASSIFICATION OF INSTREAM FLOW ENVIRONMENTS 用地貌学方法对溪流环境进行识别和分类
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1994.9631349
R. Wadeson
{"title":"A GEOMORPHOLOGICAL APPROACH TO THE IDENTIFICATION AND CLASSIFICATION OF INSTREAM FLOW ENVIRONMENTS","authors":"R. Wadeson","doi":"10.1080/10183469.1994.9631349","DOIUrl":"https://doi.org/10.1080/10183469.1994.9631349","url":null,"abstract":"Summary This paper highlights the considerable confusion that exists within the ecological literature concerning the classification of the lotic (flowing water) environments. A large number of ill defined terms has been introduced by various authors; these often relate to better defined geomorphological features, but are used more loosely by ecologists. This paper highlights the lack of consistency that exists and a number of recommendations are made in an attempt to alleviate the general confusion. Before attempting to provide an objective technique for a more rigorous classification, the relationships between the abiotic environment in which a community of species exists (biotope) and the channel form features recognised by fluvial geomorphologists (morphological unit) are examined. A link between the two is made through the description of the hydraulics of river flow. The Froude and Reynolds numbers are two dimensionless values frequently referred to by hydraulic engineers, and are used in this paper t...","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126598995","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: 74
WATER TEMPERATURE AND THE 1987 FISH KILL AT LAKE ST LUCIA ON THE SOUTH EASTERN COAST OF AFRICA 水温和1987年在非洲东南海岸圣卢西亚湖的鱼类死亡
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1996.9631377
D. Cyrus, S. McLean
{"title":"WATER TEMPERATURE AND THE 1987 FISH KILL AT LAKE ST LUCIA ON THE SOUTH EASTERN COAST OF AFRICA","authors":"D. Cyrus, S. McLean","doi":"10.1080/10183469.1996.9631377","DOIUrl":"https://doi.org/10.1080/10183469.1996.9631377","url":null,"abstract":"Summary An unusually cold spell during the winter of 1987 caused a drop in water temperature at Lake St Lucia. This coupled with typical estuarine salinities in the lake resulted in a fish kill. The kill was one of the largest recorded in a South African estuarine environment and involved an estimated 250,000 fish comprising at least 21 species. Most fish that died belonged to small species. Densities of dead fish recorded along the lake's shoreline ranged from 0.1 to 16.6 fish per metre. It is concluded that the combination of low water temperature and near marine salinities was the major cause of the 1987 fish kill at Lake St Lucia.","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127710710","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: 30
THE PROCESSING OF UNCONFINED, NATURALLY ENTRAINED LEAVES IN TWO LOW-ORDER SOUTHERN AFRICAN MOUNTAIN STREAMS 在非洲南部的两条低阶山涧中，对无拘无束、自然夹带的树叶进行加工
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1994.9631347
S. Lamberth, B. Stewart, B. R. Davies
{"title":"THE PROCESSING OF UNCONFINED, NATURALLY ENTRAINED LEAVES IN TWO LOW-ORDER SOUTHERN AFRICAN MOUNTAIN STREAMS","authors":"S. Lamberth, B. Stewart, B. R. Davies","doi":"10.1080/10183469.1994.9631347","DOIUrl":"https://doi.org/10.1080/10183469.1994.9631347","url":null,"abstract":"Summary Breakdown of unconfined and confined leaves of the riparian tree Brabejum stellatifolium L. was investigated in two low order mountain streams (Window Stream and Langrivier) in the southwestern Cape, South Africa. At both sites, 5000 unconfined leaves were released in April and another 5000 in December 1990. The leaves were marked and half of them presoaked in river water prior to release. Leaves reaching a net 100 m below the point of release were removed periodically. On termination of the experiments, the study reaches were cleared of the remaining marked leaves. The distance which these leaves had travelled, and the retentive feature at which they were found were recorded. All leaves were weighed after recovery. In December 1990, leaves confined in coarse-mesh bags were placed on the stream beds of the two sites. Decay rates of unconfined leaves differed between streams and seasons but not between wetted and dry leaves or those of contrasting initial size and weight. In winter, breakdown of un...","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130075096","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: 1
IMPACTS OF REPEATED APPLICATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA 苏云金芽孢杆菌和双硫磷在南非橙河中部防治黑蝇(双翅目:拟蝇科)中对大型无脊椎动物的影响
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1995.9631361
R. Palmer, A. Palmer
{"title":"IMPACTS OF REPEATED APPLICATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA","authors":"R. Palmer, A. Palmer","doi":"10.1080/10183469.1995.9631361","DOIUrl":"https://doi.org/10.1080/10183469.1995.9631361","url":null,"abstract":"Summary The impacts of five consecutive treatments of blackfly larvicides on macroinvertebrates in the middle Orange River were assessed. The abundance of the midge Xenochironomus sp. and the limpet Burnupia sp. was lower at sites treated with Bacillus thuringiensis var. israelensis (B.t.i.) compared to control sites (P<0.05). There was no medium-term impact on the abundance of two B.t.i.-sensitive taxa: Simulium spp. and the midge Rheotanytarsus fuscus. Repeated applications of the organophosphate temephos (AbateR 200EC) significantly reduced the abundance of 25% of the invertebrate taxa in the stones-in-current biotope (P<0.1). The most affected taxa were R. fuscus, certain Baetis spp. mayflies and Coenagrionidae damselflies. Ordination of the species/sample matrix using detrended correspondence analysis showed that changes in invertebrate abundance and composition caused by either larvicide were well within the range of natural seasonal and spatial variation. However, the control programme may be detri...","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127689928","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: 9
MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD 管理圣卢西亚河口——来自泥浆的信息
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1997.9631392
R. Owen, A. Forbes
{"title":"MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD","authors":"R. Owen, A. Forbes","doi":"10.1080/10183469.1997.9631392","DOIUrl":"https://doi.org/10.1080/10183469.1997.9631392","url":null,"abstract":"Summary The infaunal macrobenthic community of the St Lucia estuary has been exposed to natural disturbance in the form of salinity fluctuations arising from floods and hypersaline conditions, and human-induced interference arising from dredging and beam trawling. The responses of the benthos to these disturbances have been recorded between 1983 and 1994 and are discussed in the light of management options for the estuary. A simple benthic sampling strategy is suggested to monitor the important benthic species.","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121629270","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: 2
A REVIEW OF THE AQUATIC AVIFAUNA OF THE MHLATHUZE ESTUARY 姆拉图泽河口水生鸟类区系研究进展
Southern African Journal of Aquatic Sciences Pub Date : 1900-01-01 DOI: 10.1080/10183469.1998.9631418
D. Cyrus
{"title":"A REVIEW OF THE AQUATIC AVIFAUNA OF THE MHLATHUZE ESTUARY","authors":"D. Cyrus","doi":"10.1080/10183469.1998.9631418","DOIUrl":"https://doi.org/10.1080/10183469.1998.9631418","url":null,"abstract":"Summary This paper is the first published review of the aquatic avifauna of the Mhlathuze Estuary. It also uses a regional approach in order to determine the potential for certain hitherto unrecorded species to occur there. The study shows that there appear to have been significant changes in the aquatic avifauna over the past 15 years and that these have, by and large, been negative. However, information on the current status of the avifauna is lacking and it is considered important to determine this as soon as possible.","PeriodicalId":161337,"journal":{"name":"Southern African Journal of Aquatic Sciences","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131987518","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
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