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Discovery of a New Population of Devils River Minnow (Dionda diaboli), with Implications for Conservation of the Species

Gary P. Garrett, Robert J. Edwards and Clark Hubbs
The Southwestern Naturalist
Vol. 49, No. 4 (Dec., 2004), pp. 435-441
Stable URL: http://www.jstor.org/stable/3672399
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Discovery of a New Population of Devils River Minnow (Dionda diaboli), with Implications for Conservation of the Species
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Abstract

The Devils River minnow (Dionda diaboli) has a limited distribution in Texas and Mexico. It is listed as threatened in the United States and endangered in Mexico. Recent collections in previously inaccessible locations in the headwaters of Pinto Creek, Kinney County, Texas, revealed a large population of D. diaboli. This species was found in habitats of flowing, spring-fed waters over gravel-cobble substrates, usually associated with aquatic macrophytes, but was confined to the upper segment of the creek. The confined distribution of Devils River minnow can offer valuable insight into its habitat and conservation. The future of this population might be threatened by reduced spring flows resulting from excessive pumping from the associated aquifer. /// La sardinita diabla, Dionda diaboli, tiene una distribución limitada en Texas y México. Se encuentra como una especie amenazada en los Estados Unidos y en peligro de extinción en México. Las colecciones recientes en lugares previamente inaccesibles en la cabecera del Pinto Creek, condado de Kinney, Texas, revelaron una población grande de D. diaboli. Esta especie fue encontrada en hábitats de corrientes de aguas manantiales, sobre substratos de grava, asociada generalmente con macrófitos acuáticos, pero fue confinada al segmento superior del arroyo. La distribución confinada de D. diaboli puede ofrecer una comprensión valiosa del hábitat y necesidades de la conservación de esta especie. El futuro de esta población puede ser amenazado por el flujo primaveral reducido resultado del bombeo excesivo del acuífero asociado.

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