The thesis also investigates how resource available to the immature stage indirectly regulates the dynamics of the mature stage, for a Holling-II type resource function. It then investigates the significance of different functional representations of the resource (prey), and how varying functional parametrizations lead to different types of dynamic forcing at the immature population stage. This thesis uses a system of Delay Differential Equations (DDEs) to represent a hypothetical two-stage structured (mature/immature) population model, with a delay term in the conversion of prey biomass to predator biomass. These attributes are also affected when marine populations are subjected to withdrawals (fishing) and birth pulses. For stage-structured populations, variable resource at one stage may impact the dynamics of other stages, and affect the stability of the population trajectory, including its predictability on different time horizons. A major external influence is the effect of varying degrees of resource available to the population. Internal drivers include self-regulating mechanisms and time-delayed feedback processes, such as time lapse between prey ingestion and conversion of ingested biomass into predator biomass. Marine Populations exhibit complex dynamics that are forced by internal and external influences.
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