Aug
07

Paddlefish Anatomy

The other day, I read an article by Grande and Bemis called “Osteology and Phylogenetic Relationships of Fossil and Recent Paddlefishes (Polyodontidae) with Comments on the Interraelationships of Acipenseriformes”. This article explained in detail the paddlefish bone structure, and what each bone was called. I was amazed to see the names, in the paddlefish mouth…
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Aug
06

Measuring Pressure and Flow Speed

At different points this summer I have also helped Dr. Sanderson measure the pressure and flow speed within the flow tank and within the models. Changes in pressure occur as water enters the models, which influences the direction of flow within the models since water moves from areas of high pressure to areas of low…
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Aug
06

Paddlefish Represented with 3D Models

Another aspect of my research this summer has been modeling. Since paddlefish have many details that we don’t understand, we can simplify the system into a 3D-printed plastic model. This allows us to choose which elements of the paddlefish feeding system to include and test. We can test each parameter separately through these models, and…
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Jul
20

Preserving a Paddlefish

Last week I got to prepare a new paddlefish to be preserved! We have two paddlefish already preserved, and we had one left that has been frozen for a long time. It was not preserved at first because of its small size. It is easier to see the flow patterns inside a large paddlefish since…
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Jul
10

Progress with the Paddlefish

My research on paddlefish feeding has progressed smoothly. I began to address the question of how a paddlefish feeds by putting them one at a time into the flow tank. There is a picture attached to show how they are positioned in the tank. The first few times we ran dye through the paddlefish’s mouth…
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