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Response to Comment on "Open-ocean fish reveal an omnidirectional solution to camouflage in polarized environments"
Parrish Brady1, Alex Gilerson2, George Kattawar3
1Department of Integrative Biology, University of Texas, Austin, TX 78712, USA.
Abstract:
Cronin et al take issue with our evidence for polarocryptic carangid fish based on concerns of pseudoreplication, our contrast metric, and habitat. We clarify (i) the importance of camouflage in near-surface open ocean environments and (ii) the use of a Stokes contrast metric and further (iii) conduct individual-based statistics on our data set to confirm the reported polarocrypsis patterns.
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Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...

