Temperature-Induced Changes in the Oxygen Equilibrium Curve of the Blood of the Brown Bullhead, Ictalurus Nebulosus

The affinity of blood for oxygen is dependent on temperature, which would seem to present a disadvantage to those fishes which encounter large seasonal temperature changes. Considering the well-known acclimatory abilities of many fishes, it would seem reasonable to propose the occurrence of seasonal modification of blood oxygen equilibria to compensate for changes in temperature. 2. In Ictalurus nebulosus, blood from one group of fish acclimated at 24 degrees C showed a consistently higher oxygen affinity compared with a group acclimated at 9 degrees C, when measured at the same temperature. This shift, accompanying thermal metabolic acclimation, minimizes the effect of temperature on oxygen affinity. 3. The shift did not persist when dilute solutions of hemoglobin were studied. 4. No changes with acclimation were seen in the multiple hemoglobin pattern nor in blood pH. 5. The erythrocyte, rather than the plasma, appears to be the site of modification. 6. Some large changes in erythrocyte potassium accompanied thermal acclimation, but the relation of this to the shift in oxygen affinity is unknown

Chapter 4. Extract of Africa: Towards the Equitable and Ecologically Sound Governance of Mining and Drilling

Background: Economists and political scientists have long recognised four kinds of goods: private, public, common-pool and club, the assumption being that category membership is determined by the physical properties of the goods themselves. But in the theory of plural rationality—the approach taken in this chapter—where specific goods end up is, to the extent that that is not determined by their physical properties, the outcome of a never-ending struggle between four kinds of social solidarity: individualism (which works towards privatisation), hierarchy (which favours the creation of public goods), egalitarianism (which is supported by common-pool goods) and fatalism (whose upholders enable club goods by the ease with which they can be excluded). Methodology: The study uses historical surveys and case-studies of different contexts where natural resource governance has upset harmonious relationship between different stakeholders. Application/Relevance to systems analysis: Our argument is that policy and governance, particularly in Africa, have allowed (indeed encouraged) individualism and hierarchy to dominate, thereby drowning out the other two institutional “voices”. The result, as we show by way of a continent-wide historical survey and three case-studies—REDD+ in the Democratic Republic of Congo, acid mine drainage in South Africa and oil extraction in Nigeria—has been “crap” governance (in contrast to good governance, which requires that all four voices are both heard and responded to by the others). Put another way, the “resource curse” is not the inevitable consequence of a country being heavily reliant on extractive industries; it stems from insufficient “clumsiness”: exemplified, as Kofi Annan has recently pointed out, by just two solidarities—multinational companies (individualism) and political leaders (hierarchy)—colluding to swindle the citizens out of their just rewards from their natural resources. Policy implications: Of policy implication, is the bringing-in of the two currently excluded voices, and we conclude by showing how, in relation to our case-studies, this can be achieved. Conclusion: Analyses of resource-related conflicts, especially in Africa, have often ignored the voices of the excluded social solidarities. Analysing this problem through a systems perspective will allow the incorporation of all voices as a way of constructing a more harmonious system in natural resource governance