Some mechanisms for the control of pumping activity in bivalves

Foster-Smith, R.L.

doi:10.1080/10236247609386941

Cited by 60 publications

(29 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Filter-feeding bivalves display two main strategies for dealing with suspended sediment : they may reduce clearance rate, or they may eliminate unwanted particles as pseudofaeces (Foster-Smith, 1976) . Hyridella menziesi appears to use the latter strategy, as copious pseudofaeces were produced by mussels in the high silt treatments, and to a lesser extent in the medium silt concentrations .…”

Section: Discussionmentioning

confidence: 99%

Effects of food and silt on filtration, respiration and condition of the freshwater mussel Hyridella menziesi (Unionacea: Hyriidae): implications for bioaccumulation

Roper

Hickey

1995

Hydrobiologia

View full text Add to dashboard Cite

The effect of exposure to different concentrations of food and suspended silt on filtration, respiration and condition were studied in the freshwater mussel Hyridella menziesi . Using a milk solids-based food and kaolin to simulate silt, mussels were maintained at different combinations of food and silt concentrations for 3 weeks . Between treatments mean filtration rates ranged from 0 .97-1 .66 1 g -' h -1 , and respiration from 0 .50-1 .35 mg 02 g -' h -1 . Silt (non-volatile suspended solids up to 35 mg 1 -1 ) failed to have a significant effect on filtration rate or condition, but with increasing food levels (volatile suspended solids up to 35 mg 1 -1 ) filtration rate was reduced, and condition was reduced at the lowest food concentration (<5 mg 1 -1 ) . Respiration showed a food x silt interaction between treatment blocks . When food was low respiration increased with increasing silt concentrations, and when silt was low (<5 mg 1 -1 ) respiration increased with increasing food concentrations . The observed effects of food and silt on filtration, respiration and condition are discussed in terms of their potential for affecting contaminant bioaccumulation . In low-food situations (i .e ., <5 mg 1 -1 ), if mussels are pumping large volumes of water, contaminant uptake rates could be enhanced, whereas abundant food would result in lower pumping rates and lower uptake rates . Changes in metabolism with food concentration have implications for contaminant elimination, and changes in biochemical composition associated with changing condition could affect the tissue distribution and retention of contaminants .

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of food and silt on filtration, respiration and condition of the freshwater mussel Hyridella menziesi (Unionacea: Hyriidae): implications for bioaccumulation

Roper

Hickey

1995

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…Using the numerical values from Foster-Smith (1976), Q = 0.3 cm 3 s À1 , D = 0.505 cm, L = 5 cm, and standard properties (q = 1024 kg m À3 ; m = 1.047 · 10 À6 m 2 s À1 at 34.8& S, 20°C; g = 9.81 m s À2 ), u m2 = 1.5 cm s À1 , Re D = 72.3, L/D = 5/ 0.505 = 9.91>L e /D = 0.06 Re D = 4.34, so the flow is fully developed at the exit. Using also K in + K dev % 0.35 and 1/2qu m2 2 = 0.115 Pa, Eq.…”

Section: A4 Numerical Examplementioning

confidence: 99%

Water pumping and analysis of flow in burrowing zoobenthos: an overview

Riisgård

Larsen

2005

Aquat Ecol

View full text Add to dashboard Cite

Burrowing animals maintain contact with the water above the sediment by pumping water through a tube system and therefore measurements of water pumping rate of burrowing animals is of crucial importance for the study of many processes both within and above the sea floor. This review deals with the measuring of water pumping and the analysis of flow generated by burrowing deposit-and filter-feeding zoobenthos in order to determine the type of pump and mechanisms involved, flow rate, pump pressure, and pumping power. The practical use of fluid mechanical principles is examined, and it is stressed that not only the pump pressure that a burrowing animal can apply is of interest for assessing the energy cost of pumping, but also the distribution of excess pressure along its burrow is of importance for assessing the seepage flow of oxygen-rich water into the sediment surrounding the burrow because this bioirrigation exerts a considerable effect on the chemistry and microbiology of sediments. Dense populations of burrowing filterfeeding zoobenthos also interact with the water above the sediment interface and this is reflected in the development of phytoplankton concentration profiles above the filter-feeding animals. In stagnant situations the near-bottom water may be depleted of food particles, depending on the population filtration rate and the intensity of the biomixing induced by the filtering activity. But moderate currents and the biomixing can presumably generate enough turbulence to facilitate mixing of water layers at the sea bed with the layers above where food particle concentrations are relatively higher. Following a brief summary of types of burrowing benthic animals, common methods for measuring pumping rates are described along with examples. For estimating the required pump pressure, biofluid mechanical theory for flow in tube-pump systems is summarised (elaborated in Appendix A). Specific examples are given to illustrate general principles and to give an idea of typical values of flow rate, pressure drop and power involved. Finally, some flow effects generated by burrowing animals in and above the sediment are described.

show abstract

“…The exhalant siphon is believed to be the most important adjustable system resistance (Foster-Smith 1976a). The siphonal aperture is oval, the long axis of which is about 3.5 times the short axis in the fully open state.…”

Section: Inhalant Opening and Other Canals Exhalant Siphonmentioning

confidence: 99%