The Size Composition of Invertebrate Drift in a Rocky Mountain Stream

Oikos ◽  
1984 ◽  
Vol 43 (1) ◽  
pp. 68 ◽  
Author(s):  
J. David Allan
Keyword(s):  
Rocky Mountain ◽  
Size Composition ◽  
Mountain Stream ◽  
Invertebrate Drift

scholarly journals Thermal Characteristics of a Beaver Dam Analogues Equipped Spring-Fed Creek in the Canadian Rockies

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 990
Author(s):  
Tariq M. Munir ◽  
Cherie J. Westbrook
Keyword(s):  
Thermal Characteristics ◽  
Cutthroat Trout ◽  
Rocky Mountain ◽  
Optimal Growth ◽  
Stream Temperature ◽  
Mountain Stream ◽  
Suitable Habitat ◽  
Restoration Technique ◽  
Beaver Dam ◽  
In Series

Beaver dam analogues (BDAs) are becoming an increasingly popular stream restoration technique. One ecological function BDAs might help restore is suitable habitat conditions for fish in streams where loss of beaver dams and channel incision has led to their decline. A critical physical characteristic for fish is stream temperature. We examined the thermal regime of a spring-fed Canadian Rocky Mountain stream in relation to different numbers of BDAs installed in series over three study periods (April–October; 2017–2019). While all BDA configurations significantly influenced stream and pond temperatures, single- and double-configuration BDAs incrementally increased stream temperatures. Single and double configuration BDAs warmed the downstream waters of mean maxima of 9.9, 9.3 °C by respective mean maxima of 0.9 and 1.0 °C. Higher pond and stream temperatures occurred when ponding and discharge decreased, and vice versa. In 2019, variation in stream temperature below double-configuration BDAs was lower than the single-configuration BDA. The triple-configuration BDA, in contrast, cooled the stream, although the mean maximum stream temperature was the highest below these structures. Ponding upstream of BDAs increased discharge and resulted in cooling of the stream. Rainfall events sharply and transiently reduced stream temperatures, leading to a three-way interaction between BDA configuration, rainfall and stream discharge as factors co-influencing the stream temperature regime. Our results have implications for optimal growth of regionally important and threatened bull and cutthroat trout fish species.

Size Composition of Invertebrate Drift and Fish Predation in a Texas Stream

1988 ◽  
Vol 33 (2) ◽  
pp. 177 ◽  
Author(s):  
David E. Bowles ◽  
Robert A. Short
Keyword(s):  
Size Composition ◽  
Fish Predation ◽  
Invertebrate Drift

pH dependence of iron photoreduction in a rocky mountain stream affected by acid mine drainage

2001 ◽  
Vol 15 (10) ◽  
pp. 1979-1992 ◽  
Author(s):  
Diane M. McKnight ◽  
Briant A. Kimball ◽  
Robert L. Runkel
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Ph Dependence ◽  
Rocky Mountain ◽  
Mountain Stream ◽  
Acid Mine

Macroinvertebrate drift in a Rocky Mountain stream

Hydrobiologia ◽  
1987 ◽  
Vol 144 (3) ◽  
pp. 261-268 ◽  
Author(s):  
J. David Allan
Keyword(s):  
Rocky Mountain ◽  
Mountain Stream ◽  
Macroinvertebrate Drift

Testing a model of drift-feeding using three-dimensional videography of wild brown trout, Salmo trutta, in a New Zealand river

2003 ◽  
Vol 60 (12) ◽  
pp. 1462-1476 ◽  
Author(s):  
Nicholas F Hughes ◽  
John W Hayes ◽  
Karen A Shearer ◽  
Roger G Young
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Focal Point ◽  
Three Dimensional ◽  
Size Composition ◽  
Invertebrate Drift ◽  
Intake Rate ◽  
Drift Feeding ◽  
Foraging Area ◽  
Brown Trout Salmo Trutta

We tested the assumptions and predictions of a foraging model for drift-feeding fish. We used three-dimensional videography to describe the foraging behavior of brown trout, Salmo trutta, mapped water depth and velocity in their foraging area, sampled invertebrate drift to determine length class specific drift densities, and captured trout to determine the size composition of their diet. The model overestimated the fish's prey capture rate and gross energy intake rate by a factor of two. Most of this error resulted from the fact that prey detection probabilities within the fish's foraging area averaged only half the expected value. This was the result of a rapid decrease in capture probability with increasing lateral distance from the fish's focal point. Some of the model's assumptions were accurate: equations for predicting reaction distance and minimum prey size supported reliable predictions of the shape and size of the fish's foraging area and the size composition of the diet. Other assumptions were incorrect: fish detected prey within the predicted reaction volume, not on its upstream surface as expected, fish intercepted prey more slowly than the expected maximum sustainable swimming speed, and fish captured about two-thirds of their prey downstream of their focal point, rather than upstream.

Life histories, production, and microdistribution of two caddisflies (Trichoptera) in a Rocky Mountain stream

1986 ◽  
Vol 64 (12) ◽  
pp. 2706-2716 ◽  
Author(s):  
Gael A. Ogilvie ◽  
Hugh F. Clifford
Keyword(s):  
Life Histories ◽  
Larval Instar ◽  
Rocky Mountain ◽  
Annual Production ◽  
Mountain Stream ◽  
Prepupal Stage ◽  
First Order ◽  
Fine Particulate ◽  
Southern Alberta ◽  
Two Populations

This paper reports results of a 2-year study of the caddisflies Oligophlebodes zelti (Limnephilidae) and Neothremma alicia (Uenoidae) in a first-order Rocky Mountain stream of southern Alberta. The Oligophlebodes population had a univoltine cycle: eggs were oviposited in July and August and hatched in about 20 days, and the larvae grew rapidly during the remainder of the ice-free season. Larvae overwintered in the fourth larval instar and molted to the fifth instar the following spring. Pupation occurred in June, and adults started emerging in mid-July. Annual production for the O. zelti population was 116 mg∙m−2∙year−1. The Neothremma population had a 2-year cycle. Eggs apparently hatched after freeze-up. Larvae overwintered in the second instar. Most of the population achieved the third instar by the following July and the fourth instar by August, and spent the second winter in either the fourth or fifth instar. There was about a 3-week prepupal stage the following July and then emergence in July and August. Annual production for the N. alicia population was 103 mg∙m−2∙year−1. Oligophlebodes zelti and N. alicia larvae fed mainly on fine particulate organic matter and diatoms. Both O. zelti and N. alicia larvae were found on rocks only in fast water areas, but the two populations did not inhabit the same riffles. The riffles inhabited by O. zelti were wider with lower slopes and water velocities than riffles dominated by N. alicia larvae. Correlation analysis, using several parameters, indicated that total periphyton of the rocks might be a major factor accounting for O. zelti's distribution. The microdistribution of the N. alicia population was not correlated with any food source.

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