Development of a theoretical and practical foundation for the assessment of abundance of large pelagic species

当动物形成开放种群时，很难估计它们的丰度。 这意味着有动物以通常未知的速度进入和离开种群。 标记和再捕获模型是有效的测量丰度时，封闭的种群，没有移民或移民的动物使用。 然而，当标记和再捕获模型适用于开放的动物种群，如大型远洋物种，我们必须通过最大似然法的移民和迁出率估计，这偏见的丰度估计。在这项研究计划中，通过整合传统和尖端的新技术，我将开发和测试新的创新程序，以准确地确定变量的值，这些变量形成了大型远洋物种开放种群丰度的准确标记和重新捕获模型估计的发展的关键假设。目前的估计数是不准确的，因为没有测试关键假设的工具。

It is very difficult to estimate the abundance of animals when they form open populations. This means that there are animals entering and exiting the population at a rate that is usually unknown. Mark and recapture models are effective for measuring abundance when used on closed populations where there is no immigration or emigration of animals. However, when mark and recapture models are applied to open populations of animals, such as large pelagic species, we must estimate through a maximum likelihood approach the rates of immigration and emigration and this biases the estimates of abundance. In this research program, by integrating conventional and cutting edge new technology, I will develop and test new innovative procedures to accurately determine values of variables that form key assumptions for the development of accurate mark and recapture model estimates of abundance for open populations of large pelagic species. Present estimates are inaccurate because critical assumptions have not been tested as the tools required to do this did not exist.