Effects of environmental temperature and hypoxia on the oxygen consumption of the suspension-feeding gastropod Crepidula fornicata L.

The ability of the slipper limpet Crepidula fornicata L. to feed on suspended particles carried into the mantle cavity by cilia on the gill has attracted attention for many years since the feeding mechanism was described by Orton (1912). Subsequent studies were made on the possible origins of this mode of feeding (Yonge, 1928, 1938), and later Werner (1951, 1952, 1953, 1955, 1959) made more detailed observations on the mechanisms by which particles are retained by the animal. He showed that coarse particles are strained by means of a mucus filter covering the inhalant aperture to the mantle cavity, whilst the majority of the medium and fine particles are entangled by a second mucus filter secreted by an endostyle and which lies against the frontal surface of the gill (for review, see Jørgensen, 1966; Newell, 1970).

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Critical oxygen tensions in newborn, young, and adult mice

American Journal of Physiology-Legacy Content ◽

10.1152/ajplegacy.1963.205.2.325 ◽

1963 ◽

Vol 205 (2) ◽

pp. 325-330 ◽

Cited By ~ 20

Author(s):

S. Cassin

Keyword(s):

Oxygen Consumption ◽

Oxygen Tension ◽

Environmental Temperature ◽

Mild Hypothermia ◽

Newborn Mouse ◽

Newborn Mice ◽

Adult Mice ◽

Critical Oxygen ◽

Rate Of Oxygen Consumption ◽

Oxygen Tensions

Critical oxygen tensions of newborn, young, and adult mice are presented. At neutral environmental temperature, oxygen consumption of newborn mice is unaffected by reducing the oxygen tension of inspired air to 85 mm Hg. Five-day-old mice, at neutral environmental temperature, tolerate a decrease in ambient oxygen tension to 100 mm Hg without a depression of oxygen consumption. Adult mice behave in a qualitatively similar fashion. When the ambient temperature is lowered below neutral, the mice are unable to maintain a constant oxygen consumption if hypoxia is induced. It appears as though the depression of oxygen consumption during hypoxia is linearly related to the hypothermic increment to metabolism: the greater the extra oxygen consumption, the more readily it is reduced. Although the newborn mouse is unable to combat hypothermia effectively, it does respond to mild hypothermia for short periods by increasing its rate of oxygen consumption. Evidence is presented of a rapid maturation of temperature controlling mechanisms during growth.

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Differences in resource allocation to reproduction across the intertidal-subtidal gradient for two suspension-feeding marine gastropods: Crepidula fornicata and Crepipatella peruviana

Marine Ecology Progress Series ◽

10.3354/meps12152 ◽

2017 ◽

Vol 572 ◽

pp. 165-178 ◽

Cited By ~ 12

Author(s):

JA Pechenik ◽

CM Diederich ◽

OR Chaparro ◽

JA Montory ◽

FJ Paredes ◽

...

Keyword(s):

Resource Allocation ◽

Suspension Feeding ◽

Marine Gastropods ◽

Crepidula Fornicata

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INTERRELATIONS OF DAILY METABOLIC CYCLE, ACTIVITY, AND ENVIRONMENTAL TEMPERATURE OF MICE

Canadian Journal of Research ◽

10.1139/cjr50d-020 ◽

1950 ◽

Vol 28d (6) ◽

pp. 293-307 ◽

Cited By ~ 26

Author(s):

J. S. Hart

Keyword(s):

Oxygen Consumption ◽

Energy Expenditure ◽

Low Temperatures ◽

Environmental Temperature ◽

Large Energy ◽

Daily Cycle ◽

Temperature Range ◽

Metabolism Chamber ◽

Metabolic Cycle

The daily metabolic cycle of fully fed, adult white mice, at temperatures from − 8 °C. to 37 °C., averaged 48 ml. of oxygen per mouse per hour between the highest nocturnal and lowest diurnal values, but this value was significantly greater at the higher temperatures. Over the same temperature range, forced activity of mice in a rotating metabolism chamber, up to approximately one-half the maximum running speeds studied, resulted in direct superimposition of work metabolism upon that of rest, with a constant metabolic increment at all temperatures. At the maximum running speeds the metabolism produced by the work decreased with decreasing temperature, with some gain in efficiency. The daily metabolic cycle fell within the activity range in which a given degree of work produced the same increment in oxygen consumption at all temperatures. These studies lead to the hypothesis that, in mice, some of the metabolic components of the daily cycle are additive over the biokinetic range. This results in a very large energy expenditure at low temperatures.

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