Effects of Red Shiner (Cyprinella lutrensis) on Red River Pupfish (Cyprinodon rubrofluviatilis)
A proposed desalinization project that would affect the entire upper Red River basin, Oklahoma-Texas, would, if completed, raise the possibility of invasion by red shiner, Cyprinella lutrensis, into stream reaches from which it has been restricted by naturally high salinity. Because introduced red s...
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Veröffentlicht in: | The Southwestern naturalist 1999-09, Vol.44 (3), p.287-295 |
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Zusammenfassung: | A proposed desalinization project that would affect the entire upper Red River basin, Oklahoma-Texas, would, if completed, raise the possibility of invasion by red shiner, Cyprinella lutrensis, into stream reaches from which it has been restricted by naturally high salinity. Because introduced red shiners are known to impact native fish communities, we asked if red shiner could have an adverse effect on Red River pupfish, Cyprinodon rubrofluviatilis, which typically occurs in reaches of the Red River with high salinity. In an array of artificial streams we examined effects of red shiner on survival, condition, and reproduction of Red River pupfish. In the presence of red shiner, pupfish successfully produced larvae, but fewer juvenile pupfish survived to potentially recruit. /// Un proyecto propuesto de desalinización que afectaría a toda la cuenca del Red River superior, Oklahoma-Texas, aumentaría, si es completado, la posibilidad de una invasión de la sardinita roja, Cyprìnella lutrensis, en riachuelos en donde no ha estado por una salinidad naturalmente alta. Preguntamos si la sardinita roja podría occasionar un efecto negativo sobre el pez cachorito del Red River, Cyprìnodon rubrofluviatilis, ya que la sardinita roja introducida suele impactar las communidades naturales de peces. Cyprìnodon rubrofluviatilis tipicamente se encuentra en las cuencas del Red River con alta salinidad. Examinamos los efectos de la sardinita roja en la supervivencia, condición y reprodución del pez cachorito del Red River en una serie de riachuelos artificiales. En presencia de la sardinita roja, el pez cachorito produjo larvas con éxito pero menos juveniles del pez cachorito sobrevivieron para su posible reproducción. |
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ISSN: | 0038-4909 1943-6262 |