Ichthyological Exploration of the American West:

Miller, Robert Rush; Hubbs, Clark; Miller, Frances H.

doi:10.2307/j.ctt1rfzxt0.8

Cited by 6 publications

(6 citation statements)

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“…The first major collections (1843–1860) were associated with the United States‐Mexican border survey (1843–1860) (Emory 1857). From 1920 to 1980 surveys were conducted by academic scientists (Miller & Hubbs 1960; Miller 1961; Minckley & Deacon 1968; Minckley 1973; Miller et al 1991). After 1980 intense surveys were conducted by state and federal agencies to document the remnant distributions of native fishes.…”

Section: Methodsmentioning

confidence: 99%

Quantifying Rarity, Losses, and Risks for Native Fishes of the Lower Colorado River Basin: Implications for Conservation Listing

Fagan

Kennedy

Unmack

2005

Conservation Biology

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We examined spatial distributions of fishes native to the lower basin of the Colorado River (25 species) at three scales to determine percent decline from historical distributions based on a regional biodiversity database. We cumulated records from 1843 to 1980 to develop a "historical distribution" for each species and used those occurrences recorded from 1981 to 1998 as "modern" records. We then contrasted historical and modern distributions to (1) quantify losses in spatial distribution; (2) determine how strongly these losses and fragmentation patterns corresponded to the perceived risk of extinction of each species, as represented by its status under the IUCN Red List of Endangered Species; and (3) update extinction risk rankings for 15 fishes endemic to the lower Colorado Basin according to the IUCN criteria. Based on presence and absence data, fish fauna of the lower Colorado Basin have suffered massive distributional losses. On average, ranges of extant species have diminished more than 45% relative to their historical distribution, and 35% of species have lost 50% or more of their occurrences. We provide nine new IUCN rankings and six updates to reflect more accurately the heightened imperilment of these species. Based on our new rankings, 7 of the 15 lower Colorado Basin endemics are critically endangered, 1 is endangered, 2 are vulnerable, and 1 is already extinct. We categorize the remaining 2 endemics as lower risk. This work demonstrates the utility of matching quantitative spatial metrics such as the scale-area slope statistic to extinction risk criteria for species whose persistence is strongly influenced by spatial distribution. Key Words: extinction risk, fish distributions, fish spatial distribution, IUCN criteria, quantitative spatial metrics, scale-area slope Cuantificación de Rareza, Pérdidas y Riesgos para Peces Nativos de la Cuenca Baja del Río Colorado: Implicaciones para las Listas de Conservación Resumen: Examinamos la distribución espacial de peces nativos de la cuenca baja del Río Colorado (25 especies) en tres escalas para determinar el porcentaje de declinación de sus distribuciones históricas a partir de una base de datos de biodiversidad regional. Acumulamos registros de 1843 a 1980 para desarrollar una "distribución histórica" de cada especie y consideramos a las ocurrencias de 1981 a 1998 como registros "modernos". Posteriormente contrastamos las distribuciones históricas y modernas para (1) cuantificar pérdidas de distribución espacial; (2) determinar el grado en que estas pérdidas y patrones de fragmentación correspondieron con el riesgo de extinción percibido para cada especie, representado por su estatus en la Lista Roja de Especies en Peligro de IUCN (IUCN, Unión Mundial para la Conservación) y (3) actualizar la clasificación de riesgo de extinción de 15 peces endémicos a la cuenca baja del Río Colorado, de acuerdo con criterios de la IUCN. Con base en datos de presencia y ausencia, la fauna de peces del bajo Rió Colorado ha sufrido reducciones de distribución masivas. En p...

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Section: Methodsmentioning

confidence: 99%

Quantifying Rarity, Losses, and Risks for Native Fishes of the Lower Colorado River Basin: Implications for Conservation Listing

Fagan

Kennedy

Unmack

2005

Conservation Biology

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“…Leon Springs was later designated the type locality (Hubbs and Springer, 1957 (Hubbs and Springer, 1957). The population in Leon Springs was eliminated by impoundment (Miller et al, 1991). Those populations in the Balmorhea springs complex and the Diamond Y region are most abundant in steno¬ thermal waters.…”

Section: Examples In Gambusiamentioning

confidence: 99%

Aquatic fauna of the northern Chihuahuan Desert : contributed papers from a special session within the Thirty-Third Annual Symposium of the Desert Fishes Council /

Garrett¹,

Allan²

2003

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“…In presenting evidence for historic connections between the Bonneville Basin and the Snake River, Hubbs and Miller (1948) noted the absence of Least Chub in the Snake River. However, most of Carl Hubbs's ichthyological surveys occurred in other regions of the Great Basin, with a notable paucity of sampling sites in the upper Snake River (Miller et al 1991). Recent surveys in the Snake River and tributaries have used either boat electrofishing or backpack electrofishing, depending on channel width and depth (Maret andMebane 2005, Meyer et al 2013).…”

Section: Discussionmentioning

confidence: 99%

First Documentation of Least Chub in the Snake River Drainage in Idaho

Billman,

Stokes,

Calderwood

et al. 2023

Western North American Naturalist

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Ichthyological Exploration of the American West:

Cited by 6 publications

References 0 publications

Quantifying Rarity, Losses, and Risks for Native Fishes of the Lower Colorado River Basin: Implications for Conservation Listing

Quantifying Rarity, Losses, and Risks for Native Fishes of the Lower Colorado River Basin: Implications for Conservation Listing

Aquatic fauna of the northern Chihuahuan Desert : contributed papers from a special session within the Thirty-Third Annual Symposium of the Desert Fishes Council /

First Documentation of Least Chub in the Snake River Drainage in Idaho

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