A total of one hundred and twenty Clarias gariepinus comprising 30 dead and 30 live fishes were examined for protozoan parasites infestation, sixty each from the wild and a pond (cultured environment) over a period of six months. Ichthyophthirius multifiliis was the most common protozoan parasites found in C. gariepinus from the wild (River Benue) and cultured (pond) environments. These protozo...

Studies related to nictemeral variation were executed in a fish growing pond, during all the seasons of the year, collecting data for dissolved oxygen; temperature; pH and electrical conductivity at the feeding channel on pond's surface, bottom and at streamlet bed. The results showed that Autumn was the season which had the lowest values of water temperature, the interval points, during Spring...

Algal blooms have been a major problem in water systems due to the nuisance, toxicity and water quality deterioration. Cyanobacteria, also known as blue-green algae, are present in pond mostly during the summer period. These organisms may impair the environment in various ways such as deoxygenation by decomposing in the water becoming potentially toxic to fish. Fertilizers are added to fish pon...

a mathematical model was developed to predict the effects of wind speed, light, ph, temperature, dissolved carbon dioxide and chemical oxygen demand (cod) on dissolved oxygen (do) in fish ponds. the effects of organic feeds, aeration and fish activity were added to the model developed by kayombo et al. for waste stabilization ponds (ecological modeling 127(2000): 21-31) to reflect the situat...

◆ THE CAPTURE-RECAPTURE ◆ ESTIMATE THE “capture-recapture method” or “Petersen’s method”, as it is sometimes referred to by fishery biologists, is a simple method of estimating the size of an animal or human population. A number of applications to the estimation of animal population size are given in Seber (1982). Lock and Moore in Gordon and Gordon (1992) note that the capturerecapture method ...

Biodiversity and nature values in anthropogenic landscapes often depend on land use practices and management. Evaluations of the association between management and biodiversity remain, however, comparatively scarce, especially in aquatic systems. Furthermore, studies also tend to focus on a limited set of organism groups at the local scale, whereas a multi-group approach at the landscape scale ...

The traditional practice of utilizing wastewater into fish pond is a unique example of sustainable socio-economic development pertaining to resource recovery in the Eastern Kolkata wetlands, a Ramsar site in India. This paper revealed the stress of urban pollution and poor land use planning on the world’s largest natural wetland. This is the first time to critically evaluate dynamics of oxygen ...

Applications of capture-recapture procedures go back to at least 1896, to the work of Petersen [1896], who was interested in the size of fish populations. Another early paper by Lincoln [1930] was concerned with waterfowl. The method gets its name from such applications concerned with estimating the number of fish in a pond, or more generally, estimating the population size of various species i...