Modification of Teleost Visual Feeding Range Model for Cuttlefish: A Visual-Systems Comparison Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/s1784m445

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  • With human activity causing increases in turbidity in coastal marine waters, it is of economic and ecological importance to understand how this increase will affect organisms living in these areas. At most risk may be predators, such as many teleosts and cephalopods, reliant on vision to detect and capture prey. While many studies have examined how turbidity changes the visual range of feeding fish, none have been found for cephalopods, major invertebrate predators. This study compared aspects of teleost and cephalopod visual systems using a model developed for feeding teleosts in turbid environments. When the properties of the visual system between cephalopods and teleosts were compared for their response to environmental attributes, some aspects were similar while others were divergent. With the variability between the visual systems, I found that a model for vertebrates could not be easily applied to invertebrates. However, I was able to identify areas of continued and future study. With research in these areas, it will become possible to model the impact of turbidity on the visual range of feeding cephalopods.
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