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SOME PLANKTONIC BRACHIONID ROTIFERS FROM SOUTH AFRICAN IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: DP Sartory --- Department of Water Affairs, Forestry and Environmental Conservation, Republic of South AfricaFrom a survey of zooplankton samples from 73 South African impoundments, 16 species of rotifers of the family Brachionidae were identified. Of these eight were of the genus Braohionus and four of the genus Keratella. The most frequently encountered brachionid... -
TOXIC CONCENTRATION OF FREE AMMONIA TO BRACHIONUS CALYCIFLORUS PALLAS, A ROTIFER PEST SPECIES FOUND IN HIGH RATE ALGAL PONDS (HRAP's)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: IreneJ. de Moor --- National Institute for Water Research, Republic of South AfricaLaboratory tests on Brachionus calyciflorus Pallas indicate that at low concentrations of free ammonia (< 7 mg l −1) pH levels up to 9,85 could be tolerated for 96 h without apparent ill effect. Free ammonia concentrations > 14,4 mg... -
Review of anthropogenic threats and biodiversity assessment of an Ethiopian soda lake, Lake Abijata
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Wagaw --- Department of Biology, Ethiopia S Mengistou --- Department of Zoological Sciences, Ethiopia A Getahun --- Department of Zoological Sciences, EthiopiaThe intention of this review is to assess the impact of anthropogenic activities on the biodiversity of Lake Abijata. The lake was established as a National Park, together with Lakes Shalla and Chitu, to conserve water birds. It has high... -
Assessment of the ecological status of the Kinyankonge River (Burundi), using a Biotic Integrity Index of zooplankton (BII-zooplankton)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Buhungu --- , Burundi C Sibomana --- , Burundi DC Adjahouinou --- , Bénin G Ntakimazi --- , Burundi CA Bonou --- , Bénin E Montchowui --- , République du BéninThis study aimed at assessing the ecological status of the Kinyankonge River using a zooplankton-based Biotic Integrity Index (BII-zooplankton). This was achieved through monthly collections of zooplankton from four stations along the river over 18 months (from July 2015 to... -
Zooplankton communities in Lake Nasser, Egypt, under the current flood regime, before the construction of Grand Ethiopian Renaissance Dam (GERD)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Mahmoud H Hegab --- , Egypt Nehad Khalifa --- , Egypt Walid Aly --- , EgyptThis study focuses on changes in zooplankton composition and abundance in Lake Nasser during different flood periods before the construction of the Grand Ethiopian Renaissance Dam (GERD). Field surveys were carried out in August 2016 (flood period), December 2016 (post-flood... -
Potential live feeds for larval fish culture in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Solomon Melaku --- , Ethiopia Abebe Getahun --- , Ethiopia Seyoum Mengestou --- , Ethiopia Akewake Geremew --- , Ethiopia Amha Belay --- , United StatesThe artificial propagation of commercially important fish species in Ethiopia is constrained by high mortality rate at the early stage of larval rearing and a subsequent poor growth performance during later stages. This is mainly due to absence of live... -
Zooplankton distribution and community structure as a function of environmental variables in the Niger River and its tributaries in Niger
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Souley Adamou --- Université de Toulouse, France B Alhou --- Université Abdou Moumouni de Niamey, Niger M Tackx --- Université de Toulouse, France F Azémar --- Université de Toulouse, FranceThe Niger River and its main tributaries (Sirba, Tapoa and Mékrou) in Niger were sampled during high and low water flow with the objectives of (1) comparing the taxonomic structure, diversity and abundance of the zooplankton community (rotifers, copepods, crustaceans)...