scholarly journals Trophic contamination by octocrylene does not affect aerobic metabolic scope in juveniles clownfish

2020 ◽  
pp. 050-054
Author(s):  
Lucas Julie ◽  
Logeux Valentin ◽  
Rodrigues Alice MS ◽  
Stien Didier ◽  
Lebaron Philippe
Keyword(s):  
Metabolic Scope

scholarly journals Thermal performance of fish is explained by an interplay between physiology, behaviour and ecology

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Philipp Neubauer ◽  
Ken H Andersen
Keyword(s):  
Thermal Performance ◽  
Null Model ◽  
Oxygen Limitation ◽  
Driving Mechanism ◽  
Metabolic Rates ◽  
Metabolic Scope ◽  
And Function ◽  
Temperature Impacts ◽  
Term Performance ◽  
Species Ecology

Abstract Increasing temperatures under climate change are thought to affect individual physiology of fish and other ectotherms through increases in metabolic demands, leading to changes in species performance with concomitant effects on species ecology. Although intuitively appealing, the driving mechanism behind thermal performance is contested; thermal performance (e.g. growth) appears correlated with metabolic scope (i.e. oxygen availability for activity) for a number of species, but a substantial number of datasets do not support oxygen limitation of long-term performance. Whether or not oxygen limitations via the metabolic scope, or a lack thereof, have major ecological consequences remains a highly contested question. size and trait-based model of energy and oxygen budgets to determine the relative influence of metabolic rates, oxygen limitation and environmental conditions on ectotherm performance. We show that oxygen limitation is not necessary to explain performance variation with temperature. Oxygen can drastically limit performance and fitness, especially at temperature extremes, but changes in thermal performance are primarily driven by the interplay between changing metabolic rates and species ecology. Furthermore, our model reveals that fitness trends with temperature can oppose trends in growth, suggesting a potential explanation for the paradox that species often occur at lower temperatures than their growth optimum. Our model provides a mechanistic underpinning that can provide general and realistic predictions about temperature impacts on the performance of fish and other ectotherms and function as a null model for contrasting temperature impacts on species with different metabolic and ecological traits.

scholarly journals Changes in body temperature influence the scaling of and aerobic scope in mammals

2006 ◽  
Vol 3 (1) ◽  
pp. 100-103 ◽  
Author(s):  
James F Gillooly ◽  
Andrew P Allen
Keyword(s):  
Body Size ◽  
Metabolic Rate ◽  
Size Dependence ◽  
Maximal Activity ◽  
Scaling Exponent ◽  
Temperature Influence ◽  
Aerobic Scope ◽  
Metabolic Scope ◽  
Single Power ◽  
Maximum Metabolic Rate

Debate on the mechanism(s) responsible for the scaling of metabolic rate with body size in mammals has focused on why the maximum metabolic rate ( ) appears to scale more steeply with body size than the basal metabolic rate (BMR). Consequently, metabolic scope, defined as /BMR, systematically increases with body size. These observations have led some to suggest that and BMR are controlled by fundamentally different processes, and to discount the generality of models that predict a single power-law scaling exponent for the size dependence of the metabolic rate. We present a model that predicts a steeper size dependence for than BMR based on the observation that changes in muscle temperature from rest to maximal activity are greater in larger mammals. Empirical data support the model's prediction. This model thus provides a potential theoretical and mechanistic link between BMR and .

scholarly journals Partitioning the metabolic scope: the importance of anaerobic metabolism and implications for the oxygen- and capacity-limited thermal tolerance (OCLTT) hypothesis

2016 ◽  
Vol 4 (1) ◽  
pp. cow019 ◽  
Author(s):  
Rasmus Ejbye-Ernst ◽  
Thomas Y. Michaelsen ◽  
Bjørn Tirsgaard ◽  
Jonathan M. Wilson ◽  
Lasse F. Jensen ◽  
...  
Keyword(s):  
Thermal Tolerance ◽  
Anaerobic Metabolism ◽  
Metabolic Scope

scholarly journals Ventilation, Oxygen Uptake and Haemolymph Oxygen Transport, Following Enforced Exhausting Activity in the Dungeness Crab Cancer Magister

1979 ◽  
Vol 80 (1) ◽  
pp. 271-285 ◽  
Author(s):  
B. R. McMAHON ◽  
D. G. McDONALD ◽  
C. M. WOOD
Keyword(s):  
Cardiac Output ◽  
Oxygen Uptake ◽  
Oxygen Transport ◽  
Lactate Concentration ◽  
Fold Increase ◽  
Oxygen Extraction ◽  
Oxygen Release ◽  
Cancer Magister ◽  
Metabolic Scope ◽  
Dungeness Crabs

Scaphognathite and heart-pumping frequencies, ventilation volume, cardiac output, oxygen uptake and oxygen transport by haemolymph have been studied in unrestrained Dungeness crabs (Cancer magister) before, immediately after, and during recovery from 20 min of enforced exhausting activity. Exercise increased oxygen uptake 4-fold. This increase was achieved by more than 2-fold elevation of both ventilation volume and cardiac output and by greater participation of haemocyanin in oxygen delivery. The elevated ventilation volume resulted entirely from an increase in scaphognathite pumping frequency, while the rise in cardiac output resulted largely from increase in stroke volume. Prior to exercise haemocyanin accounts for less than 50% of the oxygen delivered to the tissues. Following exercise this increases to over 80%, the additional oxygen release being mediated by a depression of prebranchial oxygen tension and a substantial Bohr effect resulting from build up of lactate ion in the haemolymph and subsequent fall in pH. These changes allowed % oxygen extraction from branchial water to be maintained at 28% despite a 2-fold increase in ventilation volume, and allowed an increase in %. oxygen extraction by the tissues. Despite these changes oxygen supply fell below demand during exercise, and considerable anaerobic metabolism resulted, as evidenced by a 9-fold increase in haemolymph lactate concentration. The resulting oxygen debt required 8–24 h for repayment. Aerobic metabolic scope, and mechanisms of increasing oxygen uptake and transport in this crab are compared with those of a range of fish species.

Environmentally relevant methylmercury exposure reduces the metabolic scope of a model songbird

2019 ◽  
Vol 246 ◽  
pp. 790-796 ◽  
Author(s):  
Alexander R. Gerson ◽  
Daniel A. Cristol ◽  
Chad L. Seewagen
Keyword(s):  
Metabolic Scope ◽  
Methylmercury Exposure

The Behaviour, Survival and Respiration of the Cockles Cerastoderma Edule and C. Glaucum in Air

1972 ◽  
Vol 52 (3) ◽  
pp. 661-680 ◽  
Author(s):  
C. R. Boyden
Keyword(s):  
Oxygen Uptake ◽  
Behaviour Pattern ◽  
Air Breathing ◽  
Cerastoderma Edule ◽  
Anoxic Conditions ◽  
Metabolic Scope ◽  
Uptake Rates

Aspects of the physiology of the two cockles Cerastoderma edule (L.) and C. glaucum (Poiret) in air have been investigated. Both cockles exhibit bradycardia during exposure and are similarly tolerant of anoxic conditions, but C. edule survives longer in air than C. glaucum. This is accounted for by the fact that C. edule displays a behaviour pattern of valve movements upon emersion which allows air-breathing. Oxygen uptake rates of this cockle measured in air lie close to the lowest rates recorded in water, and are considered to approximate to a basal or quiescent level. C. glaucum does not air-breathe and is restricted to lowest shore levels. Values for ‘maximal’ levels of oxygen uptake in water have also been obtained together with estimates of metabolic scope for the cockle.

scholarly journals Trophic contamination by pyrolytic polycyclic aromatic hydrocarbons does not affect aerobic metabolic scope in zebrafish Danio rerio

2016 ◽  
Vol 88 (1) ◽  
pp. 433-442 ◽  
Author(s):  
J. Lucas ◽  
A. Bonnieux ◽  
L. Lyphout ◽  
X. Cousin ◽  
P. Miramand ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Danio Rerio ◽  
Aromatic Hydrocarbons ◽  
Metabolic Scope ◽  
Polycyclic Aromatic

A metabolic scope based model of fish response to environmental changes

2012 ◽  
Vol 237-238 ◽  
pp. 132-141 ◽  
Author(s):  
Andrea Cucco ◽  
Matteo Sinerchia ◽  
Christel Lefrançois ◽  
Paolo Magni ◽  
Michol Ghezzo ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Metabolic Scope ◽  
Fish Response

scholarly journals Metabolic Scope and Interspecific Competition in Sculpins of Greenland Are Influenced by Increased Temperatures Due to Climate Change

PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e62859 ◽  
Author(s):  
Henrik Seth ◽  
Albin Gräns ◽  
Erik Sandblom ◽  
Catharina Olsson ◽  
Kerstin Wiklander ◽  
...  
Keyword(s):  
Climate Change ◽  
Interspecific Competition ◽  
Metabolic Scope

scholarly journals Effect of dispersed crude oil exposure upon the aerobic metabolic scope in juvenile golden grey mullet (Liza aurata)

2012 ◽  
Vol 64 (4) ◽  
pp. 865-871 ◽  
Author(s):  
Thomas Milinkovitch ◽  
Julie Lucas ◽  
Stéphane Le Floch ◽  
Hélène Thomas-Guyon ◽  
Christel Lefrançois
Keyword(s):  
Crude Oil ◽  
Grey Mullet ◽  
Liza Aurata ◽  
Metabolic Scope ◽  
Oil Exposure
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