Topic
Spikedace
About: Spikedace is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 240 citations. The topic is also known as: Meda fulgida.
Papers
TL;DR: Among the species acclimated to 25°C, desert pupfish Cyprinodon macularius, western mosquitofish Gambusia affinis, and Gila topminnow Poeciliopsis occidentalis were most tolerant to high temperature.
Abstract: We used a lethal thermal method to estimate the upper thermal tolerances of 11 native and 7 nonnative fish species found throughout southern Arizona. Fish were acclimated to 25°C and 30°C. For all species tested, an increase in acclimation temperature resulted in a higher thermal tolerance value. Among the species acclimated to 25°C, desert pupfish Cyprinodon macularius, western mosquitofish Gambusia affinis, and Gila topminnow Poeciliopsis occidentalis were most tolerant to high temperature. Speckled dace Rhinichthys osculus, spikedace Meda fulgida, and loach minnow R. cobitis were least tolerant. Many native species demonstrated a limited ability to extend their upper temperature tolerances via acclimation. Our data suggest that several native species may be sensitive to increasing annual and large daily temperature fluctuations in Arizona's streams and rivers. Although southwestern native fishes were previously believed to be tolerant to high temperature due to their evolution in desert enviro...
84 citations
TL;DR: The spikedace (Meda fulgida) aligned very closely with desert sucker in use of all 3 physical habitat variables, and grouped with loach minnow and speckled dace in the velocity of water occupied, but utilized deeper waters.
Abstract: – The physical habitat utilization of 7 species of native fishes in a Sonoran Desert stream, Aravaipa Creek, Arizona is described. The species occupied significantly different depths and velocities of water. Longfin dace (Agosia chrysogaster), speckled dace (Rhinichthys osculus) and loach minnow (Tiaroga cobitis) used similar depths and velocities. Two of the three larger species (Sonora sucker [Catostomus insignis] and roundtail chub [Gila robusta]) used areas of greater depth and reduced velocity. Desert sucker (Catostomus clarki) grouped with loach minnow and speckled dace in the velocity of water occupied, but utilized deeper waters. The spikedace (Meda fulgida) aligned very closely with desert sucker in use of all 3 physical habitat variables.
34 citations
TL;DR: Spikedace syntopic with red shiner displayed a niche shift into currents significantly swifter than those selected when in isolation, which suggests negative interspecific interactions potentially detrimental to the indigenous species.
Abstract: ern North America by the nonnative red shiner (Cyprinella lutrensis) seems linked with the dramatic decline of a threatened cyprinid (spikedace, Medafulgida) native to the Gila River subbasin. The mechanism by which red shiner impacts spikedace is unknown. Two hypotheses have been offered: displacement of the native through competitive interaction with invader, and replacement of native by nonnative as a result of environmental perturbation. To ascertain whether spikedace was being actively displaced by red shiner, we compared niche requirements of each in syntopy, allotopy, and disjunct allopatry. Fishes were collected by seining one to three sites in each of six different stream reaches; and current velocity, substrate particle size, and water depth were measured at each site. Red shiner occupied similar microhabitat whether allopatric, allotopic, or syntopic with spikedace. Spikedace occupied the same microhabitat when allopatric or allotopic to red shiner. However, spikedace syntopic with red shiner displayed a niche shift into currents significantly swifter than those selected when in isolation. Displacement of spikedace by red shiner suggests negative interspecific interactions potentially detrimental to the indigenous species.
TL;DR: In this paper, the authors developed quantitative PCR assays for detecting loach minnow and spikedace DNA in environmental samples, without detection of non-target species, including other cyprinid fishes with which they co-occur.
Abstract: Loach minnow (Rhinichthys cobitis) and spikedace (Meda fulgida) are legally protected with the status of Endangered under the U.S. Endangered Species Act and are endemic to the Gila River basin of Arizona and New Mexico. Efficient and sensitive methods for monitoring these species’ distributions are critical for prioritizing conservation efforts. We developed quantitative PCR assays for detecting loach minnow and spikedace DNA in environmental samples. Each assay reliably detected low concentrations of target DNA without detection of non-target species, including other cyprinid fishes with which they co-occur.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2006 | 1 |
| 1994 | 1 |
| 1992 | 1 |
| 1991 | 1 |