"Seasonal Responses of Filtration Rates to Temperature, Oxygen Availabi" by Albert J. Burky, Richard B. Benjamin et al.

Biology Faculty Publications

Title

Seasonal Responses of Filtration Rates to Temperature, Oxygen Availability, and Particle Concentration of the Freshwater Clam, Musculium partumeium (Say)

Author(s)

Albert J. Burky, University of DaytonFollow
Richard B. Benjamin, Syracuse University
Denis G. Conover, University of Dayton
Jennifer Detrick, University of Dayton

Document Type

Article

Publication Date

1985

Publication Source

American Malacological Bulletin

Abstract

Seasonal filtration rates of a pond population of the freshwater pisidiid clam, Musculium partumeium (Say), were assessed by measuring the clearance of 2.02 µ.m latex beads from suspension and expressed in terms of FR = a(AFDW}b where FR = filtration rate (ml H20 · hr- 1 ) , AFDW = mg ash-free dry weight of a whole clam and "a" and "b" are constants. The a-values ( = FR of a 1-mg AFDW clam} vary seasonally with the highest rates corresponding to periods of maximum growth and reproduction in the spring and fall. Changes in "b" reflect the influence of body size on the weight-specific rates (FR/AFDW). Seasonally "a" and "b" are inversely related. Therefore. seasonal increases in FR are proportionately greater for smaller clams. The 0,0 of FR is between 2-3 during the winter and decreases to 1.0 during the summer (temperature insensitivity) when clams are relatively inactive. At 20°c under aerobic conditions FR decreases as the concentration of suspension increases over a range of= 1.38-40 mg. · 1-1 with the FR for 1-mg AFDW clams going from 4.8 to 0.5; this minimum FR is maintained at higher concentrations. The amount of filtrate cleared (µ.g · clam- 1 • hr-1) initially increases as concentration increases (to = 13 mg -1 • I) then decreases before increasing again at concentrations> =30 mg · I - 1• Ingestion must be less at higher concentrations since pseudofeces are produced at concentrations > 22 mg · 1-1• Under anaerobic conditions FR is uniformly low at all concentrations. Seasonal responses of FR are assessed in terms of temperature. oxygen availability and particle concentration, and interpreted in terms of the interaction of growth, reproduction and population dynamics. These data have been integrated for 1-m2 of pond substrate. It is suggested that M. partumeium probably supplements filter-feeding with other mechanisms of energy intake such as deposit-feeding.

Inclusive pages

201-212

ISBN/ISSN

0740-2783

Document Version

Published Version

Comments

Document is licensed under the Creative Commons attribution/noncommercial/share-alike license (CC-BY-NC-SA). Permission documentation is on file.

Publisher

American Malacological Society

Volume

Peer Reviewed

yes

eCommons Citation

Burky, Albert J.; Benjamin, Richard B.; Conover, Denis G.; and Detrick, Jennifer, "Seasonal Responses of Filtration Rates to Temperature, Oxygen Availability, and Particle Concentration of the Freshwater Clam, Musculium partumeium (Say)" (1985). Biology Faculty Publications. 308.
https://ecommons.udayton.edu/bio_fac_pub/308

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