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Impact of abattoir waste on Woji Creek, Port Harcourt, Nigeria, using physicochemistry and macrozoobenthic diversity indices
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Zabbey --- Department of Animal Science and Fisheries, Nigeria I Etela --- Department of Animal Science and Fisheries, NigeriaThe impact of waste discharge from Zoo abattoir, Port Harcourt, on the environmental quality of Woji Creek was studied from April 2001 to March 2002 using physicochemistry and diversity of benthic animals as indicators. Priority physicochemical parameters (total suspended solid,... -
Temporal variations in the food habits of some fish species in Lake Nokoué, Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Gnohossou --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Lalèyè --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Atachi --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin G Magali --- Laboratoire EcoLab, UMR 5245 CNRS-UPS-INPT, France MC Villanueva --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, France J Moreau --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, FranceStomach contents of the 12 most abundant fish species in Lake NokouĂ©, Benin, collected between 2003 and 2005, were analysed for temporal variations in their diet. Several species showed seasonal shifts in their diets based on benthic prey abundance and... -
Solving the challenges of monitoring mobile populations: insights from studies of waterbirds in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Hannah L Thomas --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Graeme S Cumming --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South AfricaHighly mobile species are difficult to monitor. It is often unclear from abundance estimates whether a population is genuinely declining or simply elsewhere. If the spatial and temporal scales of monitoring are inadequate, the data will only be useful if... -
Stand structure, regeneration and seed dispersal patterns of Nothofagus glauca (Hualo) in central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rafael Navarro-Cerrillo --- , España Antonio Cabrera-Ariza --- , Chile Antonio Avaria --- , Chile Guillermo Palacios-Rodríguez --- , España Rómulo Santelices-Moya --- , ChileGrowing interest in functional silviculture is promoting new approaches to the study of seed dispersal and regeneration, two of the key processes that determine the structure and dynamics of plant populations. Nothofagus glauca is an obligate-seeding tree species typical of... -
Trends in shore-based angling effort determined from aerial surveys: a case study from KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JB Mann-Lang --- , South AfricaUnderstanding the spatiotemporal characteristics of effort is a critical component of managing fisheries. Recreational shore-angling is the largest sector of the linefishery and one of the primary recreational activities undertaken along the coast of KwaZulu-Natal (KZN), South Africa. The aim... -
Socio-ecological change in bait fisheries for the common sandprawn Kraussillichirus kraussi in Durban Harbour, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Chetty --- Oceanographic Research Institute (ORI), South Africa E Steyn --- Oceanographic Research Institute (ORI), South Africa JC Groeneveld --- Oceanographic Research Institute (ORI), South AfricaBait fishing for the common sandprawn Kraussillichirus kraussi in Durban Harbour, on the east coast of South Africa, has a history going back to the early 20th century and has been influenced by port development and political changes over time... -
Vegetation structure and defoliation patterns in heterogeneous grasslands under two herbage allowance levels
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Felipe Casalás --- University of the Republic, Uruguay Nicolas Caram --- University of the Republic, Uruguay Pablo Soca --- University of the Republic, Uruguay Marcelo Wallau --- University of Florida, USA Pablo Boggiano --- University of the Republic, UruguayUnderstanding the relationship between vegetation attributes and defoliation patterns at multiple spatiotemporal scales is crucial for optimising grazing systems. This study assessed the structural attributes of vegetation and the effects of defoliation frequency and intensity in a campos grassland under...