A Conservation Plan for Native Fishes of the Lower Colorado River
نویسندگان
چکیده
منابع مشابه
Quantifying Rarity, Losses, and Risks for Native Fishes of the Lower Colorado River Basin: Implications for Conservation Listing
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 t...
متن کاملThe Lower Colorado River : A Western System
--A historic look at the Colorado River will illustrate the dras tic effects of human activity on most Western rivers. Engineering features for the management of water and electric power have resulted in increased evapora tion, associated salinity, and other physicochemical changes; drastic reduction in many native plant and animal populations; increasing populations of intro duced species; ...
متن کاملParasites of native and nonnative fishes of the Little Colorado River, Grand Canyon, Arizona.
A 2-yr, seasonal, parasitological study of 1,435 fish, belonging to 4 species of native fishes and 7 species of nonnative fishes from the lower Little Colorado River (LCR) and tributary creeks, Grand Canyon, Arizona, yielded 17 species of parasites. These comprised 1 myxozoan (Henneguya exilis), 2 copepods (Ergasilus arthrosis and Lernaea cyprinacea), 1 acarine (Oribatida gen. sp.), 1 piscicoli...
متن کاملDiet and trophic niche overlap of native and nonnative fishes in the Gila River, USA: implications for native fish conservation
The upper Gila River basin is one of the few unimpounded drainage basins west of the Continental Divide, and as such is a stronghold for endemic fishes in the region. Nevertheless, multiple nonindigenous fishes potentially threaten the persistence of native fishes, and little is known of the trophic ecology of either native or nonnative fishes in this system. Gut contents and stable isotopes (C...
متن کاملPrey capture behavior of native vs. nonnative fishes: a case study from the Colorado River drainage basin (USA).
The Colorado River drainage basin is home to a diverse but imperiled fish fauna; one putative challenge facing natives is competition with nonnatives. We examined fishes from Colorado River tributaries to address the following questions: Do natives and nonnatives from the same trophic guild consume the same prey items? Will a given species alter its behavior when presented with different prey t...
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ژورنال
عنوان ژورنال: BioScience
سال: 2003
ISSN: 0006-3568
DOI: 10.1641/0006-3568(2003)053[0219:acpfnf]2.0.co;2