Fish Stock Assessment

Through this expedition, we learned how to identify the marine fish stock assessment. The fish stock assessment is a scientific analysis that tries to describe the past of current situation of a fish stock. The main objective of a fish stock assessment is to make sure that the data inputs are accurate and made in a timely matter. The results that are presented to the marine resource management are critical because it ensures how to keep sustainable fisheries, healthy ecosystems, and to have productive communities. The three inputs that are required for stock assessment are the catch, abundance, and biology. The four important methods of fish stock assessment I will examine will be: Catch per Unit Effort (CPUE), Virtual Population Analysis, Chaos theory, and lastly research surveys.
Methods of Fish Stock Assessment
The research surveys method of fish stock assessment uses empirical methods. The research surveys method surveys sample fish in many locations. The survey and data are conducted annually in order, to be able to track fluctuations closely and, also collect data
This method is also known to be the traditional and common marine fish stock management. The stock is reconstructed by birth year or year class and it also knows about what the past size is in order, to make inferences for the future use.
The next method is known as Chaos Theory. The chaos theory does not assume population equilibrium in a fish stock year to year and it also does not count fish. Another important component of this theory is it evaluates variable influences on the fish population that has been caused by habitat changes and the ecosystem. Sometimes there also subtle changes in the environment but that can still cause large population