Evening Discourse: The reservoirs of the Metropolitan Water Board and their influence upon the character of the stored water

Taylor, E. Windle

doi:10.1080/03680770.1950.11895268

Cited by 1 publication

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the summer, Chlorophyceae and Myxophyceae were often abundant and occasionally accompanied by diatoms, which can persist into the early autumn, when a second peak of diatoms occurs but much lower than in the spring. Nevertheless, patterns of plankton growth can vary from one year to the next and in adjacent reservoirs despite being fed from the same river source (Windle Taylor, 1955).…”

Section: Study Sitementioning

confidence: 99%

“…Up to the early 1970s, in order to control algal blooms in the reservoirs, periodic treatment with copper sulphate was applied, which in the Queen Mary reservoir varied between 0.7 and 1 mg/l copper sulphate, depending on the severity of the algal bloom (Windle Taylor, 1955). Treatment was carefully monitored because, if extended for too long a period or applied at too high a concentration, resistance developed in the algal population (Windle Taylor, 1955).…”

Section: Study Sitementioning

confidence: 99%

“…Treatment was carefully monitored because, if extended for too long a period or applied at too high a concentration, resistance developed in the algal population (Windle Taylor, 1955). On occasions, the application of copper was restricted to the reservoir outlet area, covering about one-third of a square mile of surface area.…”

Section: Study Sitementioning

confidence: 99%

“…This biomanipulation of the reservoir can create a stressful environment for the resident wildlife, particularly an unmanaged fish population. For example, when impounded, low turbulence conditions and the high nutrient content of the river water provide an ideal medium for algal blooms, especially cyanobacteria, to flourish at different times of the year (Windle Taylor, 1955). The proliferation of many species of phytoplankton results in the production of secondary metabolites, which are toxic to a range of animals, including fish (Codd, 2000;Landsberg, 2002;Lewis et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Consequences of an outbreak of columnaris disease (Flavobacterium columnare) to the helminth fauna of perch (Perca fluviatilis) in the Queen Mary reservoir, south-east England

Morley

Lewis

2009

J. Helminthol.

View full text Add to dashboard Cite

Parasitism of fish in fully bunded storage reservoirs has rarely been studied, while the impact of a rapid decline in a fish population on its parasite fauna is poorly understood. The present paper investigates the helminth fauna of perch (Perca fluviatilis) over a 5-year period in the Queen Mary reservoir, a large (290 ha) completely artificial water storage impoundment, which forms a unique and challenging habitat for its resident fish population. After 3 years of study, the perch population suffered a significant reduction due to a disease outbreak caused by the pathogenic bacterium Flavobacterium columnare, 'columnaris disease', and the subsequent effects on the helminth fauna over the next 2 years are evaluated. Conditions in the reservoir favour the development of large populations of zooplankton, which act as intermediate hosts for the majority of helminths in the dominant perch community. The prevalence and intensity of helminth infections showed much variation over the period prior to the perch mortality. These were likely to be due to changes in the zooplankton biomass, which was exposed to biotoxins released from periodic algal blooms and the application of copper to control them. The outbreak of F. columnare resulted in a significant decrease in the size and condition coefficient of the perch population. Changes also occurred in the composition of helminth parasites, with many species demonstrating either an increase or decrease in infection levels. These changes may be partly associated with an increase in the zooplankton biomass and altered population structure, probably caused by a decrease in fish predation pressure, which would influence the parasite population dynamics, although other factors directly associated with changes in the perch population are also likely to be influential. The long-term affects on the levels of helminth infections in the fish and associated intermediate hosts in the Queen Mary reservoir are discussed.

show abstract

Section: Study Sitementioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%