Responses of blacknose dace (Rhinichthys atratulus) and brook char (Salvelinus fontinatis) to acidified water in a laboratory stream

1995 ◽  
Vol 85 (2) ◽  
pp. 371-376 ◽  
Author(s):  
K. Newman ◽  
A. Dolloff
Keyword(s):  
Rhinichthys Atratulus ◽  
Blacknose Dace ◽  
Brook Char ◽  
Laboratory Stream

Behavior and Growth of Juvenile Atlantic Salmon (Salmo salar) and Three Competitors at Two Stream Velocities

1976 ◽  
Vol 33 (12) ◽  
pp. 2766-2773 ◽  
Author(s):  
P. E. K. Symons
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Open Water ◽  
Catostomus Commersoni ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon ◽  
Rhinichthys Atratulus ◽  
Blacknose Dace ◽  
Sexually Mature ◽  
Laboratory Stream

In a laboratory stream juvenile Atlantic salmon (Salmo salar), common shiners (Notropis comutus), blacknose dace (Rhinichthys atratulus), and white suckers (Catostomus commersoni) apparently preferred habitats that simulated their natural ones. Only salmon and one sexually mature male shiner defended territories. Dace were gregarious and nomadic, shiners tended to school in open water, and suckers were asocial bottom browsers.No competitive advantage or disadvantage was apparent between species in capturing drift food and growing at fast and slow stream velocities. However, salmon, because of their aggressive territorial behavior, successfully competed for and reduced presence of other species in their preferred boulder habitat.

Redescription of Myxobolus rhinichthidis (Myxosporea) parasitizing Rhinichthys cataractae, with a revised taxonomic list of species of Myxobolus known from North American freshwater fishes

1995 ◽  
Vol 52 (S1) ◽  
pp. 7-12 ◽  
Author(s):  
David K. Cone ◽  
Richard L. Raesly
Keyword(s):  
North America ◽  
Connective Tissue ◽  
Freshwater Fishes ◽  
Front View ◽  
Spore Size ◽  
Rhinichthys Cataractae ◽  
Rhinichthys Atratulus ◽  
Large Round ◽  
Blacknose Dace ◽  
Formalin Fixed

Myxobolus rhinichthidis Fantham, Porter and Richardson, 1939 (Myxosporea) is redescribed from longnose dace (Rhinichthys cataractae) in Maryland. Large round plasmodia occurred in the connective tissue of the skin covering the head and opercular regions. Fixed spores are oval in front view and measure 11.5–14.5 μm long, 9.0–10.5 μm wide, and 6.0–7.0 μm thick. The polar capsules are 5.5–7.0 μm long and 3.0–3.5 μm wide. Photomicrographs of formalin-fixed spores document variation in spore size and shape. The report is the first for M. rhinichthidis since the species was described from blacknose dace (Rhinichthys atratulus) in Quebec. An updated list of species of Myxobolus Bütschli, 1882 reported from freshwater fishes in North America is provided. Myxobolus jahnricei Landsberg and Lom, 1991 is considered a junior synonym of Myxobolus filamentus Grinham and Cone, 1990; and Myxobolus lii Desser, 1993 and Myxobolus gibbosus Li and Desser, 1985 are junior synonyms of Myxobolus uvuliferus Cone and Anderson, 1977.

In situ Bioassays of Brook Trout (Salvelinus fontinalis) and Blacknose Dace (Rhinichthys atratulus) in Adirondack Streams Affected by Episodic Acidification

1993 ◽  
Vol 50 (5) ◽  
pp. 902-912 ◽  
Author(s):  
Howard A. Simonin ◽  
Walter A. Kretser ◽  
Dale W. Bath ◽  
Mark Olson ◽  
James Gallagher
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Fish Mortality ◽  
Variable Model ◽  
Poor Water Quality ◽  
Rhinichthys Atratulus ◽  
Blacknose Dace ◽  
In Situ Bioassays ◽  
Precipitation Events

In situ bioassays were conducted using native Adirondack brook trout (Salvelinus fontinalis) and blacknose dace (Rhinichthys atratulus) in four headwater streams. Conductivity, pH, temperature, and stage height were monitored continuously, and water samples for laboratory analysis were collected during hydrologic episodes. Fish survived well during baseflow conditions, but during periods of spring snowmelt or large precipitation events, survival was poor. Blacknose dace were more sensitive than brook trout, and mortality was best correlated with the log of median inorganic monomeric aluminum (Alim) concentration. Brook trout mortality was best correlated with a two-variable model that included dissolved organic carbon (DOC) and a concentration–duration variable (median Alim during the episode times the duration of the episode). Brook trout mortality was inversely correlated with DOC. Bioassay fish that had been in the streams 15–24 d survived episodes better than fish that had either not become acclimatized or recovered from handling. Duration of exposure to acidic episodes was critical. Extended periods of poor water quality resulted in fish mortality and may be more important to native populations than short acidic episodes.

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