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Status, Distribution, and Detectability of the Peppered Shiner (Notropis perpallidus) in Arkansas.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Status, Distribution, and Detectability of the Peppered Shiner (Notropis perpallidus) in Arkansas./
作者:	Miller, Joseph.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	106 p.
附註:	Source: Masters Abstracts International, Volume: 83-11.
Contained By:	Masters Abstracts International83-11.
標題:	Environmental science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28965514
ISBN:	9798438750512

Status, Distribution, and Detectability of the Peppered Shiner (Notropis perpallidus) in Arkansas.
Miller, Joseph.

Status, Distribution, and Detectability of the Peppered Shiner (Notropis perpallidus) in Arkansas. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 106 p.

Source: Masters Abstracts International, Volume: 83-11.

Thesis (M.S.)--University of Central Arkansas, 2022.

This item must not be sold to any third party vendors.

The peppered shiner (Notropis perpallidus) is a small-bodied minnow endemic to Arkansas and Oklahoma. Recent research has suggested a substantial contraction in peppered shiner distribution and potential decrease in abundance. Peppered shiner has been identified as a Species of Greatest Conservation Need in the state of Arkansas. The current International Union for Conservation of Nature (IUCN) ranking for peppered shiner is "vulnerable" and is currently under review by the United States Fish and Wildlife Service (USFWS). The primary objective of this research was to provide critical data on the status and distribution of peppered shiner based on historical distribution, as well as, determine detectability for the species. To understand where peppered shiner populations persist and gain insight into its habitat requirements and potential stressors, occupancy models were parameterized using habitat and presence/absence data from seining surveys conducted at 47 sites throughout the species' historic range in Arkansas. Our goals were to 1) elucidate the current distribution of peppered shiner in Arkansas, 2) identify site-level variables that influence the presence and absence of peppered shiner locally, 3) estimate the detection probability of peppered shiner, and 4) quantitatively describe the preferred microhabitat of peppered shiner.We captured 129 peppered shiners at nine of 47 sites. All nine sites where peppered shiner was detected were in the upper Saline River. Peppered shiner was not detected in the Upper Ouachita, Little Missouri, or Caddo rivers.Probability of detection of peppered shiner was moderate under average habitat conditions and was estimated to be 0.15. Top detection models found probability of detection was positively influenced by average depth (p < 0.001), presence of water willow (Justicia americana) (p < 0.001), and irradiance (p = 0.005). Increases in detection probability with depth and presence of water willow were attributed to microhabitat preferences that may optimize foraging success and predator avoidance. Peppered shiner had the strongest positive average depth/detection probability relationship of leucisids examined.Conductivity was the best single predictor of site occupancy (p = 0.019), followed by turbidity (p = 0.045) and average depth (p = 0.030). Higher conductivity may be indicative of greater productivity, and peppered shiner may be positively responding to increased productivity. Our models suggest peppered shiner preferentially occupies locations with greater conductivity/productivity, depths greater than 1 meter, and low-moderate turbidities of around 7.0 Nephelometric Turbidity Units (NTU).Our findings indicate peppered shiner is extant in the Saline River, but may be extirpated or on the brink of extirpation throughout the rest of the species' historic distribution in Arkansas. We contend decline in peppered shiner is likely attributable to negative impacts of manmade impoundments throughout much of the species' historic range.

ISBN: 9798438750512Subjects--Topical Terms:

677245
Environmental science.
Subjects--Index Terms:

Detectability

Status, Distribution, and Detectability of the Peppered Shiner (Notropis perpallidus) in Arkansas.
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520 $a The peppered shiner (Notropis perpallidus) is a small-bodied minnow endemic to Arkansas and Oklahoma. Recent research has suggested a substantial contraction in peppered shiner distribution and potential decrease in abundance. Peppered shiner has been identified as a Species of Greatest Conservation Need in the state of Arkansas. The current International Union for Conservation of Nature (IUCN) ranking for peppered shiner is "vulnerable" and is currently under review by the United States Fish and Wildlife Service (USFWS). The primary objective of this research was to provide critical data on the status and distribution of peppered shiner based on historical distribution, as well as, determine detectability for the species. To understand where peppered shiner populations persist and gain insight into its habitat requirements and potential stressors, occupancy models were parameterized using habitat and presence/absence data from seining surveys conducted at 47 sites throughout the species' historic range in Arkansas. Our goals were to 1) elucidate the current distribution of peppered shiner in Arkansas, 2) identify site-level variables that influence the presence and absence of peppered shiner locally, 3) estimate the detection probability of peppered shiner, and 4) quantitatively describe the preferred microhabitat of peppered shiner.We captured 129 peppered shiners at nine of 47 sites. All nine sites where peppered shiner was detected were in the upper Saline River. Peppered shiner was not detected in the Upper Ouachita, Little Missouri, or Caddo rivers.Probability of detection of peppered shiner was moderate under average habitat conditions and was estimated to be 0.15. Top detection models found probability of detection was positively influenced by average depth (p < 0.001), presence of water willow (Justicia americana) (p < 0.001), and irradiance (p = 0.005). Increases in detection probability with depth and presence of water willow were attributed to microhabitat preferences that may optimize foraging success and predator avoidance. Peppered shiner had the strongest positive average depth/detection probability relationship of leucisids examined.Conductivity was the best single predictor of site occupancy (p = 0.019), followed by turbidity (p = 0.045) and average depth (p = 0.030). Higher conductivity may be indicative of greater productivity, and peppered shiner may be positively responding to increased productivity. Our models suggest peppered shiner preferentially occupies locations with greater conductivity/productivity, depths greater than 1 meter, and low-moderate turbidities of around 7.0 Nephelometric Turbidity Units (NTU).Our findings indicate peppered shiner is extant in the Saline River, but may be extirpated or on the brink of extirpation throughout the rest of the species' historic distribution in Arkansas. We contend decline in peppered shiner is likely attributable to negative impacts of manmade impoundments throughout much of the species' historic range.
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