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Sex Ratio <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br />J <br />To assess the sensitivity of the model output to changes in sex ratio, we ran 10 <br />replicate simulations each with sex ratios of 0.25, 0.33 and 0.5. These represent <br />female to male ratios of 1:3, 1:2 and 1:1, respectively. The results of the simulations <br />are provided in Figure 4. It is readily apparent that the model is very sensitive to the <br />sex ratio parameter in terms of population numbers. The more even the sex ratio, the <br />higher the final, stable number of individuals in the population. Is this-not surprising in <br />general given that it is the females that produce the offspring. However, it is surprising <br />that the population dynamics are so sensitive to relatively small changes suggesting <br />that it is essential that we have better knowledge of the overall sex ratio as well as the <br />functional sex ratio (during reproduction). <br />C~inq Capaci~ <br />To assess the relationship between carrying capacity values and population dynamics, <br />we ran a set of 100 replicate simulations with each geomorphic sections' carrying <br />capacity increased ten-fold (one order of magnitude; see Table 8). The results of these <br />simulations (Figure 5) mirror our initial intentions of not resulting in changes of either <br />magnitude nor variation of population levels. Because these fish are rare, we initially <br />modeled them well below the potential levels. We only use carrying capacity in this <br />report to limit the spatial location of the various age classes of the different species <br />29 <br /> <br />