Cod and climate in a latitudinal cline: physiological analyses of climate effects in marine fishes

By H. Pörtner, C. Bock, R. Knust, G. Lannig, M. Lucassen, F. Mark, F. Sartoris. 2008

154 citations recorded by the source corpus.

Characteristics of temperature-dependent metabolic adaptation, as well as their impli- cations for climate-dependent energy budgets, biogeography and fitness are reviewed and analysed for populations of Atlantic cod Gadus morhua in relation to findings in other fish species from north- ern and southern hemispheres, especially various species of eelpout (Zoarcidae). The analysis builds on the recently posited concept of oxygen- and capacity-dependent thermal tolerance in aquatic ectotherms. Mechanistic physiological studies are used to explain both functional differences between populations and current observations (such as the northward movement of cod, or the changes in seasonal abundance of eelpout due to global warming). Available data support the hypothesis that natural selection favours individuals that maximize growth and energy efficiency at the expense of ranges of thermal tolerance. The levels of energy turnover are subject to the con- straints of resource availability and temperature variability. Temperature variability in the cold, such as in the sub-Arctic, causes a rise in maintenance costs at the expense of growth, but possibly in favour of motility, and thus of foraging capacity. These different trends are mirrored in higher capac- ities for gene expression of key enzymes involved in aerobic metabolism (during cold acclimation) in northern as compared to southern cod populations of the East Atlantic. However, detailed patterns, as well as many of the underlying mechanisms, remain underexplored, especially with respect to the suggested hierarchy of energy allocation to energy budget components.

Subfields: Ecology, Global and Planetary Change, Oceanography

View Paper: https://www.semanticscholar.org/paper/3f4c39a506d66e2991745222f29c85e320a1f9cc

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

1. M. Peck
2. Timothy D. Clark
3. E. Sandblom
4. F. Jutfelt
5. J. Pinnegar
6. G. Hays
7. A. Rijnsdorp
8. M. Lilley

In Global and Planetary Change

1. M. Peck
2. M. Dickey‐Collas
3. J. Pinnegar
4. Timothy D. Clark
5. E. Sandblom
6. F. Jutfelt
7. R. Nash
8. A. Rijnsdorp

In Oceanography

1. M. Peck
2. Timothy D. Clark
3. F. Jutfelt
4. E. Sandblom
5. J. Pinnegar
6. Tom Doyle
7. M. Dickey‐Collas
8. H. Pörtner

Citations in the corpus

• Impacts of climate change on the complex life cycles of fish (2013, background): “…seas 523 Important aspects of habitat availability for cod are the presence of key prey for 524 larvae, specific thermal windows allowing growth (Pörtner et al., 2008), and the ability 525 of juveniles to escape predation pressure during and shortly after settlement (Juanes, 526 2007).”
• Thermal dynamics of ovarian maturation in Atlantic cod (Gadus Morhua) (2010, background): “Thus, the guidelines of Schmidt-Nielsen (1983) for further Q10 studies (see below) were followed strictly, including that the experimental temperatures should be ‘‘sufficiently far apart’’ but still fall within the natural temperature range of the fish (Sundby 2000; Brander 2005).”
• Oxygen- and capacity-limitation of thermal tolerance: a matrix for integrating climate-related stressor effects in marine ecosystems (2010, background): “Pörtner and colleagues (Pörtner and Knust, 2007; Pörtner et al., 2001; Pörtner et al., 2008) integrated these findings with those of temperature-dependent growth and abundance in the field.”
• Integrating climate-related stressor effects on marine organisms: unifying principles linking molecule to ecosystem-level changes (2012, background): “…in the oceans, the pressure to thermally specialize may contribute to the strong differentiation of Atlantic cod into populations which specialize on the regional climate and display thermal windows different from each other, as a result of regional (i.e. local) adaptation (Pörtner et al. 2008).”
• Have jellyfish in the Irish Sea benefited from climate change and overfishing? (2011, background): “Climate influences on fish stocks and interactions with jellyfish Sea temperature is known to impact on cod physiology and recruitment success (Pörtner et al., 2008), but the direction of the relationship changes spatially: from positive in relatively cold waters (such as the Barents Sea) to…”
• Ecosystem effects of ocean acidification in times of ocean warming: a physiologist’s view (2008, background): “The available data indicate that (1) thermal extremes affect large individuals first and (2) a thermally variable environment favours species with smaller individuals including juveniles, due to their wider windows of thermal tolerance (e.g. Pörtner et al. 2008).”
• Aerobic scope measurements of fishes in an era of climate change: respirometry, relevance and recommendations (2013, background): “…to whole-animal performance and fitness (Fry, 1947; Brett, 1971; Claireaux and Lefrançois, 2007; Pörtner and Knust, 2007; Farrell et al., 2008; Pörtner et al., 2008; Pörtner and Farrell, 2008; Munday et al., 2009; Nilsson et al., 2009; Pörtner, 2010; Pörtner and Peck, 2010; Clark et al.,…”
• Climate change effects on fishes and fisheries: towards a cause-and-effect understanding. (2010, background): “morhua suggests that the optimum temperatures for growth decrease with increasing body size of juveniles and adults (Pörtner et al., 2008).”