Oxygen consumption and clearance as a function of size in<i>Mytilus edulis</i>L. Veliger larvae

Riisgård, Hans Ulrik; Randløv, Anders; Hamburger, Kirsten

doi:10.1080/00785236.1981.10426569

Cited by 32 publications

(8 citation statements)

References 3 publications

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“…Respiration rates of similarsized larval stages were calculated from the oxygen consumption rates published by Sprung (1984b, 18 • C) and converted into nmol ind −1 h −1 . Other studies have obtained similar relationships for calcification (Jespersen and Olsen, 1982) and respiration rate (Riisgård et al, 1981) in the same species. Calcification rates of metamorphosed settled mussels were calculated from shell mass increments published for M. edulis kept under control pCO 2 (< 550 µatm) and optimized feeding conditions (Thomsen et al, , 2013Melzner et al, 2011) without considering the organic content of shell mass and its small ontogenetic change during the early benthic stage (Jörgensen, 1976;Thomsen et al, 2013).…”

Section: Calculation Of Larval and Juvenile Mytilus Calcification Andsupporting

confidence: 73%

“…A recent study did not confirm this hypothesis for larvae of the oyster Ostrea lurida. Here, as a consequence of the limited clearance capacities of larval bivalves, animals exposed to intermediate and higher food treatments were potentially not limited by the provided food concentrations and growth rates levelled off in these treatments (Riisgård et al, 1981;Hettinger et al, 2013).…”

Section: Periments Seawater Pco 2 Ph and [Hco −mentioning

confidence: 99%

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Impact of seawater carbonate chemistry on the calcification of marine bivalves

et al. 2015

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Abstract. Bivalve calcification, particularly of the early larval stages, is highly sensitive to the change in ocean carbonate chemistry resulting from atmospheric CO2 uptake. Earlier studies suggested that declining seawater [CO32−] and thereby lowered carbonate saturation affect shell production. However, disturbances of physiological processes such as acid-base regulation by adverse seawater pCO2 and pH can affect calcification in a secondary fashion. In order to determine the exact carbonate system component by which growth and calcification are affected it is necessary to utilize more complex carbonate chemistry manipulations. As single factors, pCO2 had no effects and [HCO3-] and pH had only limited effects on shell growth, while lowered [CO32−] strongly impacted calcification. Dissolved inorganic carbon (CT) limiting conditions led to strong reductions in calcification, despite high [CO32−], indicating that [HCO3-] rather than [CO32−] is the inorganic carbon source utilized for calcification by mytilid mussels. However, as the ratio [HCO3-] / [H+] is linearly correlated with [CO32−] it is not possible to differentiate between these under natural seawater conditions. An equivalent of about 80 μmol kg−1 [CO32−] is required to saturate inorganic carbon supply for calcification in bivalves. Below this threshold biomineralization rates rapidly decline. A comparison of literature data available for larvae and juvenile mussels and oysters originating from habitats differing substantially with respect to prevailing carbonate chemistry conditions revealed similar response curves. This suggests that the mechanisms which determine sensitivity of calcification in this group are highly conserved. The higher sensitivity of larval calcification seems to primarily result from the much higher relative calcification rates in early life stages. In order to reveal and understand the mechanisms that limit or facilitate adaptation to future ocean acidification, it is necessary to better understand the physiological processes and their underlying genetics that govern inorganic carbon assimilation for calcification.

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Section: Calculation Of Larval and Juvenile Mytilus Calcification Andsupporting

confidence: 73%

Section: Periments Seawater Pco 2 Ph and [Hco −mentioning

confidence: 99%

Impact of seawater carbonate chemistry on the calcification of marine bivalves

et al. 2015

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“…et al 1972, Zeuthen & Hamburger 1977, Riisgdrd et al 1981. Again, copepods were acclimated for 2 d prior to experiments.…”

Section: Methodsmentioning

confidence: 99%

Bioenergetics of the planktonic copepod Acartia tonsa: relation between feeding, egg production and respiration, and composition of specific dynamic action

Kiørboe¹,

Møhlenberg²,

Hamburger³

1985

Mar. Ecol. Prog. Ser.

586

336

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Rates of clearance, ingestion, ammonia excretion, respiration and egg production were measured in food-acclimated (0 to 1700 W C 1-l) planktonic copepods Acartia tonsa in relation to food concentration. Carbon and nitrogen budgets were constructed. Clearance peaked at a food concentration of 150 W C 1-l, and decreased at both higher and lower concentrations. Ingestion and egg production rates increased sigmoidally with food concentration approaching plateaus equivalent to 180 and 64 % body C d-l, respectively. Rates of ammonia excretion and respiration increased with algal concentration in a decelerating manner. Respiration and excretion rates of copepods fed at saturation food concentration were more than 4 times higher than those for starved individuals. The causality of the increased respiration rate in association with feeding (specific dynamic action, SDA) is discussed by considering the physiology and biochemistry of the processes that potentially contribute to SDA. The theoretical biochemical minimum costs of biosynthesis accounted for between 50 and 116 % of observed SDA, while assimilation costs equalled 18 to 28 %. Costs of feeding, digestion and excretion (-1 % of SDA), and the mechanical work required to transport food down the gut, contributed insignificantly to SDA. It is concluded that the increment in metabolic rate of feeding A. tonsa largely relates to biosynthesis ('growth') and transport, and that the efficiency of egg production in this species is near its theoretical maximum.

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“…The common mussel Mytilus edulis is suitable for the study of respiration rate as a function of size because it is easily reared in the laboratory from fertilized egg to an adult, and during this development increases its mass by a factor of 10 8 . Respiration rate as a function of size throughout the ontogeny of M. edulis , from early larval to the adult stage, has revealed that the b exponent is about 0.9 throughout the early pelagic larval stage ( Riisgård et al . 1981 ) as well as during the juvenile stage up to a size of 1–10 mg tissue dry mass ( Riisgård et al .…”

mentioning

confidence: 99%

No foundation of a “3/4 power scaling law” for respiration in biology

Riisgård¹

1998

Ecology Letters

104

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Respiration rate (R ) as a function of body mass (W ) is usually expressed as R = aW b. Empirically, the b value is often close to 3/4 when organisms covering a large span in body mass are compared. But recent years research on the energetic cost of growth demonstrate that young and fast growing stages show higher weight specific respiration rates than older and adult stages, and this implies that the b values tend to be higher: b∼ 1 in small (young) organisms falling to b = 0.6–0.7 in larger (older) stages. Thus, respiration and growth are integrated through the energetic costs of growth. This explains why the b value is not a “natural constant” and why a “3/4 power scaling law” cannot be deduced from the interplay between pure physical and geometric constraints of the transport of oxygen.

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Oxygen consumption and clearance as a function of size inMytilus edulisL. Veliger larvae

Cited by 32 publications

References 3 publications

Impact of seawater carbonate chemistry on the calcification of marine bivalves

Impact of seawater carbonate chemistry on the calcification of marine bivalves

Bioenergetics of the planktonic copepod Acartia tonsa: relation between feeding, egg production and respiration, and composition of specific dynamic action

No foundation of a “3/4 power scaling law” for respiration in biology

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