The effect of concentration of suspension on the filtration rates and pseudofaecal production for Mytilus edulis L., Cerastoderma edule (L.) and Venerupis pullastra (Montagu)

Foster-Smith, R.L.

doi:10.1016/0022-0981(75)90075-1

Cited by 269 publications

(131 citation statements)

References 31 publications

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“…The results of this study show that there is no effect of food cell concentration on the nitration rate of M. edulis up to 20 x 10 3 cells ml" 1 . This independence of cell concentration is similar to that described by Thompson & Bayne (1974) and by Foster-Smith (1975) over a wider range of concentrations (50 x 10 3 to 700 x 10 6 cells I" 1 ). However, Winter (1973) has recorded a decline in the filtration rate of M. edulis with increasing cell concentrations between 10 and 40 x 10 6 cells 1 -1 .…”

Section: F = Food Concentration (Cells /Il~l)supporting

confidence: 84%

“…Firstly, the smaller animals filter proportionately more food than the larger animals. Secondly, although no pseudofaeces were observed at the time of faeces collection from smaller animals, pseudofaeces are known to be produced by M. edulis when fed at cell concentrations above approximately 20000 cells ml" 1 (Thompson & Bayne, 1972;Foster-Smith, 1975), and unpublished observations suggest that this threshold concentration for pseudofaecal production is reduced with declining body size, occurring at a concentration of approximately 8000 cells ml" 1 for a 20 mg animal. Thirdly, assimilation efficiency of animals fed at the high ration levels also declines with decreasing body size (Fig.…”

Section: F = Food Concentration (Cells /Il~l)mentioning

confidence: 95%

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Combined Effects of Body Size, Food Concentration and Season on the Physiology of Mytilus Edulis

Widdows

1978

J. Mar. Biol. Ass.

229

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Multivariate experiments are used to study the effects of body size, food concentration, and season on the oxygen consumption, ammonia excretion, food assimilation efficiency and filtration rate of Mytilus edulis adults. Food concentrations and season affect both the intercept and the slope of the allometric equation describing oxygen uptake as a function of body size. Multiple regression and response surface techniques are used to describe and illustrate the complex relationship between metabolic rate, ration, season and the body size of M. edulis. Filtration rate has a relatively low weight exponent Q> = 038) and the intercept for the allometric equation is not significantly affected by food concentration, season or acclimation temperatures between 5 and 20 °C. Food assimilation efficiency declines exponentially with increasing food concentration and is dependent on body size at high food levels. The rate of ammonia excretion shows a similar seasonal cycle to that of oxygen consumption. They are both minimal in the autumn/winter and reach a maximum in the spring /summer. I N T R O D U C T I O NThe majority of studies of the physiological ecology of organisms have been concerned with changing a single environmental variable at a time, but more information on the relationships between biological responses and environmental factors would be provided by experimental techniques that emulate the multi-dimensional character of the natural environment.Experimental designs employing many variables simultaneously have several advantages over a single factor approach: (a) it is possible to obtain a broader understanding of the effects of each factor over the different conditions generated by variations in the other factors; (b) the wide range of factor combinations provides a more reliable basis for making predictions that will be valid in a variety of circumstances, and (c) it provides information on the extent of interactions between variables that are not independent of one another.In the present study, multivariate experiments have been used to investigate some physiological processes in Mytilus edulis L. The objectives were (a) to measure the adaptive responses of some physiological processes to combinations of levels of environmental factors; (b) to develop multiple regression equations and associated response surfaces that will describe the responses of Mytilus edulis to a wide range of environmental conditions, and (c) to demonstrate ways in which some physiological measurements may be used to quantify the degree of stress experienced under a variety of conditions ranging from near-optimal, through sub-lethal to lethal.In this, the first of two papers, multivariate experiments were used to study the effects

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Section: F = Food Concentration (Cells /Il~l)supporting

confidence: 84%

Section: F = Food Concentration (Cells /Il~l)mentioning

confidence: 95%

Combined Effects of Body Size, Food Concentration and Season on the Physiology of Mytilus Edulis

Widdows

1978

J. Mar. Biol. Ass.

229

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“…1995. A relationship between filtration rate and food concentration has often been demonstrated for Dreissena and many other filter-feeding bivalves, with filtration rates declining exponentially as a function of increasing food concentration when concentrations are above an incipient limiting concentration (Winter 1973, Foster Smith 1975, Walz 1978, Sprung and Rose 1988, Dorgelo and Smeenk 1988, Reeders and bij de Vaate 1990. When food concentrations are below this incipient level, filtration rates were reportedly independent of food concentrations.…”

Section: Resultsmentioning

confidence: 96%

Filtration Rates of the Zebra Mussel ( Dreissena polymorpha ) on Natural Seston from Saginaw Bay, Lake Huron

Fanslow

Nalepa

Lang

1995

Journal of Great Lakes Research

132

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“…Thompson & Bayne 1974, Epifanio & Edwart 1977, Crisp et al 1985, Deslous-Paoli et al 1992. This is partly due to the saturating nature of the FR as discussed above, but is also a consequence of increasing S resulting only in greater pseudofaeces production (see Foster-Smith 1975, Barillé et al 1997). Therefore we also describe IR as a Type 2 hyperbolic This above function gives us the total S ingested.…”

Section: Treatments Of Oysters and Experimental Designmentioning

confidence: 93%

Functional descriptions of feeding and energetics of the Pacific oyster Crassostrea gigas in New Zealand

Ren¹,

Ross²,

Schiel³

2000

Mar. Ecol. Prog. Ser.

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Pacific oysters Crassostrea gigas were fed a mixed diet of algae and silt over a range of concentrations from 0.8 to 637 mg l -1 , and an organic content ranging from 0.7 to 72%. These data were used to parameterise a set of functions describing the physiological response of oysters to varying environmental conditions. All parameters were standardised to body length. There was greater variation of size-specific clearance rate (CR) standardised to dry tissue weight than to length. CR increased hyperbolically with temperature with a maximum rate (0.24 l h -1 cm -1 ) at 20.7°C. Most feeding experiments were carried out at 10 to 13°C, except for the measurements of temperature effect. CR increased rapidly with increasing seston concentration, peaked at about 10 mg l -1 , above which it consistently decreased. It was modelled as a function of pumping rate of water and extraction efficiency of particles from water. The filtration rate was found to be a Type 2 hyperbolic function of seston concentration within the range tested. Ingestion rate was described as a function of food quantity, quality and selective ingestion of organic particles. A positive effect of organic content on absorption efficiency was found only at a very low organic content of less than 5%, while above this level, absorption efficiency was constant at 86%. Oxygen consumption rate had an allometric relationship to body size and increased over the range of experimental temperatures.

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The effect of concentration of suspension on the filtration rates and pseudofaecal production for Mytilus edulis L., Cerastoderma edule (L.) and Venerupis pullastra (Montagu)

Cited by 269 publications

References 31 publications

Combined Effects of Body Size, Food Concentration and Season on the Physiology of Mytilus Edulis

Combined Effects of Body Size, Food Concentration and Season on the Physiology of Mytilus Edulis

Filtration Rates of the Zebra Mussel ( Dreissena polymorpha ) on Natural Seston from Saginaw Bay, Lake Huron

Functional descriptions of feeding and energetics of the Pacific oyster Crassostrea gigas in New Zealand

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