...Rev. sci. tech. Off. int. Epiz., 2008, 27 (2), 499-510 Climate change: impact on honey bee populations and diseases Y. Le Conte (1) & M. Navajas (2) (1) French National Institute for Agronomic Research (Institut National de la Recherche Agronomique - INRA), UMR 406 Abeilles et Environment (INRA/UAPV), Laboratoire Biologie et Protection de l’Abeille, Site Agroparc, Domaine Saint-Paul, 84914 Avignon Cedex 9, France (2) French National Institute for Agronomic Research (INRA), UMR CBGP (INRA/IRD/CIRAD/Montpellier SupAgro), Campus International de Baillarguet, CS 30016, 34988 Montferrier-sur-Lez Cedex, France Summary The European honey bee, Apis mellifera, is the most economically valuable pollinator of agricultural crops worldwide. Bees are also crucial in maintaining biodiversity by pollinating numerous plant species whose fertilisation requires an obligatory pollinator. Apis mellifera is a species that has shown great adaptive potential, as it is found almost everywhere in the world and in highly diverse climates. In a context of climate change, the variability of the honey bee’s lifehistory traits as regards temperature and the environment shows that the species possesses such plasticity and genetic variability that this could give rise to the selection of development cycles suited to new environmental conditions. Although we do not know the precise impact of potential environmental changes on honey bees as a result of climate change, there is a large body of data at our...
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...CHAPTER 6 POPULATION GENETICS SELECTION 1. Which of the following options factually completes the statement, "If a population is in Hardy-Weinberg equilibrium..."? a. There can be no more than two alleles. b. The two alleles will be present at equal frequency. c. Allele frequencies will not change from one generation to the next. d. The dominant allele will be more common. |Correct Answer: |C, Allele frequencies will not change from one generation to the next. | [pic] 2. If allele frequencies do not change from one generation to the next, is the population definitely in Hardy-Weinberg equilibrium? Why or why not? No, it might not be in Hardy-Weinberg equilibrium. Any process that selectively targets heterozygotes can affect genotype frequencies without necessarily changing allele frequencies in the next generation. Examples are nonrandom mating, overdominance, and underdominance. [pic] 3. The Hardy-Weinberg equilibrium principle yields which of the following conclusions? a. If the allele frequencies in a population are given by p and q, the genotype frequencies are given by p2, 2 pq and q2. b. The allele frequencies in a population will not change over time. c. If the allele frequencies in a population are given by p and q, the genotype frequencies are given by p2 and q2. d. The first and third answers are correct. e. The first and second choices are correct. |Correct Answer:...
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...2009 Peng, Sun, Pinkham, and Chen A R T I 63 C L E The Institution-Based View as a Third Leg for a Strategy Tripod by Mike W. Peng, Sunny Li Sun, Brian Pinkham, and Hao Chen Executive Overview This article identifies the emergence of the institution-based view as a third leading perspective in strategic management (the first two being the industry-based and resource-based views). We (a) review the roots of the institution-based view, (b) articulate its two core propositions, and (c) outline how this view contributes to the four fundamental questions in strategy. Overall, we suggest that the institution-based view represents the third leg of a strategy tripod, overcomes the long-standing criticisms of the industrybased and resource-based views’ lack of attention to contexts, and contributes significant new insights as part of the broader intellectual movement centered on new institutionalism. A s part of a broader intellectual movement centered on new institutionalism throughout the social sciences in recent decades (DiMaggio & Powell, 1983, 1991; North, 1990, 2005; Scott, 1987, 1995, 2008b; Williamson, 1975, 1985), strategic management researchers have increasingly realized that institutions are more than background conditions (Oliver, 1997; Peng & Heath, 1996). Instead, “institutions directly determine what arrows a firm has in its quiver as it struggles to formulate and implement strategy” (Ingram & Silverman, 2002, p. 20...
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