scholarly journals Temperature tolerance and energetics: a dynamic energy budget-based comparison of North Atlantic marine species

2010 ◽  
Vol 365 (1557) ◽  
pp. 3553-3565 ◽  
Author(s):  
Vânia Freitas ◽  
Joana F. M. F. Cardoso ◽  
Konstadia Lika ◽  
Myron A. Peck ◽  
Joana Campos ◽  
...  
Keyword(s):  
Body Size ◽  
Energy Budget ◽  
North Atlantic ◽  
Marine Species ◽  
Temperature Tolerance ◽  
Life History Strategies ◽  
Dynamic Energy Budget ◽  
Scaling Relationships ◽  
Size Scaling ◽  
Pseudo Data

Temperature tolerance and sensitivity were examined for some North Atlantic marine species and linked to their energetics in terms of species-specific parameters described by dynamic energy budget (DEB) theory. There was a general lack of basic information on temperature tolerance and sensitivity for many species. Available data indicated that the ranges in tolerable temperatures were positively related to optimal growth temperatures. However, no clear relationships with temperature sensitivity were established and no clear differences between pelagic and demersal species were observed. The analysis was complicated by the fact that for pelagic species, experimental data were completely absent and even for well-studied species, information was incomplete and sometimes contradictory. Nevertheless, differences in life-history strategies were clearly reflected in parameter differences between related species. Two approaches were used in the estimation of DEB parameters: one based on the assumption that reserve hardly contributes to physical volume; the other does not make this assumption, but relies on body-size scaling relationships, using parameter values of a generalized animal as pseudo-data. Temperature tolerance and sensitivity seemed to be linked with the energetics of a species. In terms of growth, relatively high temperature optima, sensitivity and/or tolerance were related to lower relative assimilation rates as well as lower maintenance costs. Making the step from limited observations to underlying mechanisms is complicated and extrapolations should be carefully interpreted. Special attention should be devoted to the estimation of parameters using body-size scaling relationships predicted by the DEB theory.

scholarly journals Quantitative aspects of metabolic organization: a discussion of concepts

2001 ◽  
Vol 356 (1407) ◽  
pp. 331-349 ◽  
Author(s):  
S.A.L.M Kooijman
Keyword(s):  
Body Size ◽  
Empirical Models ◽  
Ecosystem Dynamics ◽  
Biological Organization ◽  
Dynamic Energy Budget ◽  
Scaling Relationships ◽  
Physical Chemical ◽  
Special Cases ◽  
Subcellular Processes ◽  
Metabolic Organization

Metabolic organization of individual organisms follows simple quantitative rules that can be understood from basic physical chemical principles. Dynamic energy budget (DEB) theory identifies these rules, which quantify how individuals acquire and use energy and nutrients. The theory provides constraints on the metabolic organization of subcellular processes. Together with rules for interaction between individuals, it also provides a basis to understand population and ecosystem dynamics. The theory, therefore, links various levels of biological organization. It applies to all species of organisms and offers explanations for body–size scaling relationships of natural history parameters that are otherwise difficult to understand. A considerable number of popular empirical models turn out to be special cases of the DEB model, or very close numerical approximations. Strong and weak homeostasis and the partitionability of reserve kinetics are cornerstones of the theory and essential for understanding the evolution of metabolic organization.

scholarly journals Fractal geometry predicts varying body size scaling relationships for mammal and bird home ranges

Nature ◽  
2002 ◽  
Vol 418 (6897) ◽  
pp. 527-530 ◽  
Author(s):  
John P. Haskell ◽  
Mark E. Ritchie ◽  
Han Olff
Keyword(s):  
Body Size ◽  
Fractal Geometry ◽  
Home Ranges ◽  
Scaling Relationships ◽  
Size Scaling

Intraspecific mitogenomics of three marine species-at-risk: Atlantic, spotted, and northern wolffish (Anarhichas spp.)

Genome ◽  
2018 ◽  
Vol 61 (9) ◽  
pp. 625-634 ◽  
Author(s):  
Linda A. Lait ◽  
Steven M. Carr
Keyword(s):  
At Risk ◽  
North Atlantic ◽  
Marine Species ◽  
Glacial Refugia ◽  
Life History Strategies ◽  
The North ◽  
Spotted Wolffish ◽  
The North Atlantic ◽  
Refugia Within Refugia ◽  
A Minor

High-resolution mitogenomics of within-species relationships can answer such phylogeographic questions as how species survived the most recent glaciation, as well as identify contemporary factors such as physical barriers, isolation, and gene flow. We examined the mitogenomic population structure of three at-risk species of wolffish: Atlantic (Anarhichas lupus), spotted (A. minor), and northern (A. denticulatus). These species are extensively sympatric across the North Atlantic but exhibit very different life history strategies, a combination that results in concordant and discordant patterns of genetic variation and structure. Wolffish haplogroups were not structured geographically: Atlantic and spotted wolffish each comprised three shallow clades, whereas northern wolffish comprised two deeper but unstructured lineages. We suggest that wolffish species survived in isolation in multiple glacial refugia, either refugia within refugia (Atlantic and spotted wolffish) or more distant refugia (northern wolffish), followed by secondary admixture upon post-glacial recolonisation of the North Atlantic.

scholarly journals A Dynamic Energy Budget (DEB) Model for the Keystone Predator Pisaster ochraceus

PLoS ONE ◽  
2014 ◽  
Vol 9 (8) ◽  
pp. e104658 ◽  
Author(s):  
Cristián J. Monaco ◽  
David S. Wethey ◽  
Brian Helmuth
Keyword(s):  
Energy Budget ◽  
Dynamic Energy Budget ◽  
Keystone Predator ◽  
Pisaster Ochraceus

An association between ear and tail morphologies of bats and their foraging style

2011 ◽  
Vol 89 (2) ◽  
pp. 90-99 ◽  
Author(s):  
James D. Gardiner ◽  
Jonathan R. Codd ◽  
Robert L. Nudds
Keyword(s):  
Body Size ◽  
Foraging Strategy ◽  
Aerodynamic Performance ◽  
Variance Analysis ◽  
Flight Performance ◽  
Wing Membrane ◽  
Trade Off ◽  
Scaling Relationships ◽  
Membrane Morphology ◽  
Foraging Flight

Most studies relating bat morphology to flight ecology have concentrated on the wing membrane. Here, canonical variance analysis showed that the ear and tail morphologies of bats also strongly relate to foraging strategy, which in turn is correlated with flight style. Variations in tail membrane morphology are likely to be a trade-off between increases in the mechanical cost of flight and improvements in foraging and flight performance. Flying with large ears is also potentially energetically expensive, particularly at high flight speeds. Large ears, therefore, are only likely to be affordable for slow foraging gleaning bat species. Bats with faster foraging flight styles tend to have smaller ears, possibly to cut the overall drag produced and reduce the power required for flight. Variations in the size of ears and tail membranes appear to be driven primarily by foraging strategy and not by body size, because the scaling relationships found are either weak or not significant. Ear size in bats may be a result of a trade-off between acoustic and aerodynamic performance.

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