Rostrum Size of Paddlefish (Polyodon spathula)(Acipenseriformes: Polyodontidae) from the Mississippi Delta

Jan Jeffrey Hoover; Steven G. George; K. Jack Killgore

doi:10.1643/0045-8511(2000)2000[0288:RSOPPS]2.0.CO;2

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Jan Jeffrey Hoover,^1,2 Steven G. George,¹ K. Jack Killgore¹

¹U.S. Army Waterways Experiment Station, ER-A, 3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199.
². Send reprint requests to JJH. hooverj@ex.1.wes.army.mil

Abstract

Paddlefish rostra vary in size and shape suggesting existence of multiple morphotypes. Measurements for 118 adult paddlefish from a Mississippi delta river indicate that the rostrum becomes shorter, narrower, and straighter as a fish grows. Negative allometric growth of rostra, and high variation within size classes, may obscure existence of distinctive rostral morphotypes.

The American Society of Ichthyologists and Herpetologists

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Jan Jeffrey Hoover, Steven G. George, and K. Jack Killgore "Rostrum Size of Paddlefish (Polyodon spathula)(Acipenseriformes: Polyodontidae) from the Mississippi Delta," Copeia 2000(1), 288-290, (1 January 2000). https://doi.org/10.1643/0045-8511(2000)2000[0288:RSOPPS]2.0.CO;2

Accepted: 22 June 1999; Published: 1 January 2000

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