## Abstract In __Polyodon spathula__, the pectoral fin radials, with the exception of the metapterygium, are derived from the decomposition of a single continuous cartilage fin plate that is continuous with the scapulocoracoid. This cartilage sheet develops two interior splits to form three precurs
Two modes of information processing in the electrosensory system of the paddlefish (Polyodon spathula)
β Scribed by Leonie Pothmann; Lon A. Wilkens; Michael H. Hofmann
- Publisher
- Springer
- Year
- 2011
- Tongue
- English
- Weight
- 453 KB
- Volume
- 198
- Category
- Article
- ISSN
- 0340-7594
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## Abstract The paddlefish (__Polyodon spathula__) is one of the most primitive and unique freshwater fishes of North America. It is adapted as a plankton filterβfeeder. The wide mouth and greatly expansible pharyngeal cavity allows it to process a large quantity of water. Numerous setiform gillrak
## Abstract Retinal wholeβmount preparations from the eyes of the North American paddlefish, __Polyodon spathula__, were examined with a combination of bright field and differential interference contrast microscopy. The entire retina was mapped and population counts of rod and cone photoreceptors w
Juvenile paddlefish (Polyodon spathula) hatched in 1988 have been cultivated in ponds up to sexual maturity (age 11+) in Moldavia, located in central European Plain with an altitude ranging from 429.5 m to 147 m. The average annual air temperature is 9.5-10 Β°C and the growing season for pond fish is