Brian L. Bayne

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Gonad output, reproductive effort and residual reproductive value are greater in scallops (Placopecten magellanicus) from shallow water, where conditions are more favourable, than in scallops from deep water. Variation between years in these fitness correlates is also greater in shallow water scallops. High reproductive effort is associated with a greater(More)
Bivalve molluscs have a highly plastic feeding and growth physiology. The increasing availability of families artificially selected for faster growth has enabled physiological experiments to investigate the genetic basis for variable rates of growth. Fast growth is achieved by a combination of increased rates of feeding, reduced metabolic rates and lower(More)
Mytilus californianus regulated its rate of oxygen consumption (VO2) during decline in oxygen tension, but did not acclimate VO2 when held at 58 mm Hg PO2. In spite of a capacity to consume oxygen while exposed to air (the average VO2 in air being equivalent to 0.74xthe standard rate of oxygen consumption in water), these mussels acquired an “oxygen debt”(More)
Elemental balances for carbon and nitrogen in an open-shore population of the bivalve mollusc Mytilus edulis underwent seasonal changes more characteristic of time-averaged than immediate optimization, Budgets emphasized the significance of shell and byssus towards both the carbon (8 and 44 %, respectively) and nitrogen (8 and 21 %, respectively) within(More)
Pacific oysters (Crassostrea gigas) of identical age from two genetically distinct lines, one fast growing and the other slow growing, were held at three levels of ration and analysed for physiological traits to explain differences in their rates of growth. The data supported three hypotheses; faster growth was associated with faster rates of consumption of(More)
Individuals of three mytilid species (Choromytilus meridionalis; Perna perna; Aulacomya ater) from two sites characterised by different qualities of ration available to these suspension feeders showed different rates in some components of the physiological energy budget. These differences included higher feeding (=clearance) and respiration rates, but lower(More)
Two divergent taxa in the marine mussel genus Mytilus are largely isolated geographically and are routinely exposed to distinctly different thermal environments. We tested the hypothesis that the two taxa are physiologically differentiated with respect to temperature and examined the evolved adaptations allowing one of the taxa to exploit habitats where(More)
A single cohort of small individuals (31 mm mean shell length, 112 mg mean dry flesh weight) of the marine bivalve mollusc Mytilus galloprovincialis Lmk. was held sequentially for 2 wk at each of four food levels equivalent to ingested rations of less than 0.1%, 2.6%, 3.1%, and 7.4% of dry body weight per day. Growth rate reached a maximum at the highest(More)