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Read e-book online Analysis and Management of Animal Populations PDF

By Byron K. Williams

Analysis and administration of Animal Populations bargains with the strategies all for making educated judgements in regards to the administration of animal populations. It covers the modeling of inhabitants responses to administration activities, the estimation of amounts wanted within the modeling attempt, and the appliance of those estimates and types to the advance of sound administration judgements. The e-book synthesizes and integrates in one quantity the tools linked to those issues, as they practice to ecological review and conservation of animal populations.

  • Integrates inhabitants modeling, parameter estimation and decision-theoretic techniques to administration in one, cohesive framework
  • Provides authoritative, state of the art descriptions of quantitative methods to modeling, estimation and decision-making
  • Emphasizes the function of mathematical modeling within the behavior of technology and management
  • Utilizes a unifying organic context, constant mathematical notation, and diverse organic examples

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Example text

Evidence for smoking as a necessary cause of lung cancer focuses on the fact that lung cancer victims overwhelmingly have a history of smoking, and a key implication is that the avoidance of smoking implies the near absence of lung cancer. On the other hand, opponents of tobacco restrictions appear to use sufficient causation, wherein smoking should lead to the occurrence of cancer. By implication, the absence of cancer therefore should imply the absence of smoking, which is inconsistent with the fact that the overwhelming proportion of smokers have no record of lung cancer.

If the predicted results of {T} + H are in fact observed, then the investigation provides evidence to confirm H. If O does not conform to P, then the evidence disconfirms H. Statistical testing procedures play a crucial role in the process of hypothesis confirmation. An ideal approach to scientific investigation consists of repeated applications of this sequence across all levels of investigation. Thus, alternative hypotheses often are part of a study design, wherein two or more hypotheses may be considered as alternatives for theory amendment.

Physiological stress in plants). Scientific investigation in this case involves the search for conditions that are predictive of the occurrence of an effect. Sufficient causation is implied in population biology when the influence of a prior condition is both direct and adequate to produce an effect of concern. A relevant example is the investigation of sport hunting as a potential cause of declining waterfowl population trends. Thus, heavy hunting pressure is hypothesized to reduce survival and depress population levels, recognizing that population declines can occur even in the absence of hunting.

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