The Allometry of Osmotic and Ionic Regulation in Amphibia with Emphasis on Intraspecific Scaling in Larval Ambystoma tigrinum

Pruett, Susan J.; Hoyt, Donald F.; Stiffier, Daniel F.

doi:10.1086/physzool.64.5.30156239

Cited by 5 publications

(2 citation statements)

References 50 publications

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“…Work specifically related to intraspecific allometry of osmotic water uptake, Na influx, and GFR was examined in the larval amphibian of Ambystoma tigrinum (Pruett et al 1991), and slope values between these variables and body mass varied from 0.52 to 0.77. The regression slopes, however, explained only 60% of the Na flux that was due to body mass.…”

Section: Ion Net Fluxesmentioning

confidence: 99%

“…Size is a fundamental character of any organism, and many organismal attributes vary with body size. Interspecific and intraspecific studies on animals have shown that many physiological variables vary allometrically with body size and scale to the quarter power of mass (Calder 1981(Calder , 1983Anderson and Prestwich 1982;Garland 1984Garland , 1985Wieser 1984;Garland and Else 1987;Prinzinger et al 1989;Wheatly 1989;Pruett et al 1991;Johnson et al 1993;Scott et al 1996;Schreer and Kovacs 1997;West et al 1997;Burness et al 1998). Moreover, allometric relationships have also been found for plant energetics and population density (Enquist et al 1998), suggesting that allometry may be a unifying theme among organisms.…”

Section: Introductionmentioning

confidence: 99%

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Allometric Relationship of Postmolt Net Ion Uptake, Ventilation, and Circulation in the Freshwater CrayfishProcambarus clarkii: Intraspecific Scaling

Zanotto

Wheatly

Reiber

et al. 2004

Physiological and Biochemical Zoology

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There are few intraspecific studies relating physiological parameters to body mass. This study relates scaling of ionic regulation and respiratory parameters with body mass in crayfish (Procambarus clarkii). These animals were chosen because of their direct development, spanning four orders of magnitude in body mass. Usually, these animals are hyperregulators and must maintain hemolymph electrolyte levels above those in the ambient freshwater. This is especially important in the postmolt, when ion imbalance can occur. Maintaining hemolymph ion levels above ambient involves active processes that are independently related to metabolic rate, ventilation, and circulation. Therefore, this study investigates relationships among size and ionic regulation, heart rate, and ventilation in crayfish, spanning a size range of 0.003-24 g. Postmolt net ion uptake of Ca, titratable base, Na, Cl, and NH4 increase with body mass (positive allometry) with slopes of 0.92, 0.79, 0.90, 0.84, and 0.87, respectively. Between 72% and 97% of variation in ionic regulation was related to body mass. The slopes differed from each other for Ca and titratable base but not for Na, Cl, and NH4. For heart rate and ventilation rate, different relationships were derived for animals smaller and larger than 0.01 g (between first and third instar). Animals larger than 0.01 g show a negative allometric relationship between heart rate and body size ([body mass](0.15)), while smaller animals show positive allometry with body size, but only 29% of variation in heart rate is explained by body size alone. For ventilation rates, the negative allometry with body size for animals larger than 0.01 g is present, but less than 15% of variation in ventilation rate is explained by size, while for smaller animals the size dependency disappears. Based on these results, predictions of physiological parameters such as ionic regulation based on body size are useful in crayfish, but estimates of respiratory parameters and body size should be used with caution.

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Section: Ion Net Fluxesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Allometric Relationship of Postmolt Net Ion Uptake, Ventilation, and Circulation in the Freshwater CrayfishProcambarus clarkii: Intraspecific Scaling

Zanotto

Wheatly

Reiber

et al. 2004

Physiological and Biochemical Zoology

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Osmoregulation and Excretion

Larsen

Deaton

Onken

et al. 2014

Comprehensive Physiology

182

141

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The article discusses advances in osmoregulation and excretion with emphasis on how multicellular animals in different osmotic environments regulate their milieu intérieur. Mechanisms of energy transformations in animal osmoregulation are dealt with in biophysical terms with respect to water and ion exchange across biological membranes and coupling of ion and water fluxes across epithelia. The discussion of functions is based on a comparative approach analyzing mechanisms that have evolved in different taxonomic groups at biochemical, cellular and tissue levels and their integration in maintaining whole body water and ion homeostasis. The focus is on recent studies of adaptations and newly discovered mechanisms of acclimatization during transitions of animals between different osmotic environments. Special attention is paid to hypotheses about the diversity of cellular organization of osmoregulatory and excretory organs such as glomerular kidneys, antennal glands, Malpighian tubules and insect gut, gills, integument and intestine, with accounts on experimental approaches and methods applied in the studies. It is demonstrated how knowledge in these areas of comparative physiology has expanded considerably during the last two decades, bridging seminal classical works with studies based on new approaches at all levels of anatomical and functional organization. A number of as yet partially unanswered questions are emphasized, some of which are about how water and solute exchange mechanisms at lower levels are integrated for regulating whole body extracellular water volume and ion homeostasis of animals in their natural habitats. © 2014 American Physiological Society.

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Regulation of body water balance in reedfrogs (superspecies Hyperolius viridiflavus and Hyperolius marmoratus: Amphibia, anura, hyperoliidae) living in unpredictably varying savannah environments

Schmuck

Linsenmair

1997

Comparative Biochemistry and Physiology Part A: Physiology

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The Allometry of Osmotic and Ionic Regulation in Amphibia with Emphasis on Intraspecific Scaling in Larval Ambystoma tigrinum

Cited by 5 publications

References 50 publications

Allometric Relationship of Postmolt Net Ion Uptake, Ventilation, and Circulation in the Freshwater CrayfishProcambarus clarkii: Intraspecific Scaling

Allometric Relationship of Postmolt Net Ion Uptake, Ventilation, and Circulation in the Freshwater CrayfishProcambarus clarkii: Intraspecific Scaling

Osmoregulation and Excretion

Regulation of body water balance in reedfrogs (superspecies Hyperolius viridiflavus and Hyperolius marmoratus: Amphibia, anura, hyperoliidae) living in unpredictably varying savannah environments

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