Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Rhinichthys atratulus"”.
-
Response of brook char (Salvelinus fontinalis) and blacknose dace (Rhinichthys atratulus) to acidic episodes in three headwater streams within the Shenandoah National Park, Virginia
… char (Salvelinus fontinalis) and blacknose dace (Rhinichthys atratulus) were the only two species common to all watersheds. Both species used pools more than riffles (P<0.05). Brook char density in pools increased with ANC (P<0.05), ranging from 13.1 to 40.1 fish/100m². Blacknose dace density in …
-
The Effect of Isolation by Waterfalls and Dams on Stream Fish Morphology
… depths (<em>Salvelinus fontinalis</em> and <em>Rhinichthys atratulus</em>) and position of pre-opercular spine and head length (<em>Cottus bairdi</em>). There was greater morphological divergence between <em>Cottus bairdi</em> separated by waterfalls than by dams. Nonparametric multiplicative …
-
Spring-fed streams in Virginia and assessment of livestock impacts
… individuals/m². Two species, blacknose dace (Rhinichthys atratulus) and sculpins (Cottus sp.) dominated most sites. Spring size and location factors more effectively predicted fish community structure than did instream habitat or riparian condition, indicating that composition of Virginia …
-
Investigating Reproductive Phenology and Alloparental Care in Leuciscid Fishes using Niche Theory Approaches
… atromaculatus, and Blacknose Dace Rhinycthys atratulus. I applied Hutchinsonian niche theory with respect to hydrology and water temperature to define the reproductive phenology of each species involved in the reproductive mutualism, then used Eltonian niche theory to define the role of each …
-
Distribution and life history of the endangered James Spinymussel, pieurobema collina (bivalvia: unionidae)
… (Campostoma anomalum), blacknose dace (Rhinichthys atratulus), and mountain redbelly dace (Phoxinus oreas). Juvenile P. collina, fed a mixture of three green algae species in chambers with and without silt, lived 50 days. Juveniles in silt grew significantly faster than those not in silt …
-
Effects of repetitive electroshocking on fish populations in experimental raceways and a small headwater stream in southern West Virginia
… population levels of fathead minnows and dace (Rhinichthys atratulus) were electroshocked daily for 10 days in raceways with sand, gravel, cobble and boulder/bedrock substrates. Actual combined population levels declined 17.2 percent over the study period. Average daily depletion estimates …
-
Incipient Speciation in Freshwater Fish Species from Two Isolated Watersheds
… same fish species. The target species were <em>Rhinichthys atratulus</em> (Blacknose Dace), <em>Etheostoma olmstedi</em> (Tessellated Darter) and <em>Catostomus commersonii</em> (White Sucker). In this study the number of chromosomes and their morphology, the morphological, meristic and …
-
Movement of fishes in a network of streams and implications for persistence
Mark-recapture studies sample unevenly over distance and generate biased or distance-weighted movement data, where short distances are sampled more frequently than long distances. I examined how study design affects the degree of distance-weighted sampling and observed movement distributions of …