David Ward (Former Employee)
Science and Products
Filter Total Items: 28
Relationship between fish size and upper thermal tolerance
Using critical thermal maximum (CTMax) tests, we examined the relationship between upper temperature tolerances and fish size (fry-adult or subadult lengths) of rainbow trout Oncorhynchus mykiss (41-200-mm TL), Apache trout O. gilae apache (40-220-mm TL), largemouth bass Micropterus salmoides (72-266-mm TL), Nile tilapia Oreochromis niloticus (35-206-mm TL), channel catfish Ictalurus punctatus (62
Authors
Matthew S. Recsetar, Matthew P. Zeigler, David L. Ward, Scott A. Bonar, Colleen A. Caldwell
White sturgeon mitigation and restoration in the Columbia and Snake Rivers upstream from Bonneville Dam
No abstract available
Authors
M.J. Parsley, D.G. Gallion, K.M. Kappenman, P.E. Kofoot
Index of predation on juvenile salmonids by northern squawfish in the lower and middle Columbia River and in the lower Snake River
We developed a predation index to describe the relative magnitude of predation on juvenile salmonids by northern squawfish Ptychocheilus oregonensis throughout the lower and middle Columbia River and lower Snake River. The predation index was the product of an abundance index and a consumption index. We evaluated various catch indices and found that catch per unit effort best reflected differences
Authors
David L. Ward, James H. Petersen, John J. Loch
Spatial and temporal variation in proportional stock density and relative weight of smallmouth bass in a reservoir
Population data for smallmouth bass Micropterus dolomieui in 20,235 ha John Day Reservoir on the Columbia River were used to (1) determine whether Proportional Stock Density (PSD) and Relative Weight (Wr) varied spatially and temporally in two areas of the reservoir with established smallmouth bass fisheries; (2) explore possible causes of any observed variation; and (3) discuss some management im
Authors
Matthew G. Mesa, S.D. Duke, David L. Ward
Science and Products
Filter Total Items: 28
Relationship between fish size and upper thermal tolerance
Using critical thermal maximum (CTMax) tests, we examined the relationship between upper temperature tolerances and fish size (fry-adult or subadult lengths) of rainbow trout Oncorhynchus mykiss (41-200-mm TL), Apache trout O. gilae apache (40-220-mm TL), largemouth bass Micropterus salmoides (72-266-mm TL), Nile tilapia Oreochromis niloticus (35-206-mm TL), channel catfish Ictalurus punctatus (62
Authors
Matthew S. Recsetar, Matthew P. Zeigler, David L. Ward, Scott A. Bonar, Colleen A. Caldwell
White sturgeon mitigation and restoration in the Columbia and Snake Rivers upstream from Bonneville Dam
No abstract available
Authors
M.J. Parsley, D.G. Gallion, K.M. Kappenman, P.E. Kofoot
Index of predation on juvenile salmonids by northern squawfish in the lower and middle Columbia River and in the lower Snake River
We developed a predation index to describe the relative magnitude of predation on juvenile salmonids by northern squawfish Ptychocheilus oregonensis throughout the lower and middle Columbia River and lower Snake River. The predation index was the product of an abundance index and a consumption index. We evaluated various catch indices and found that catch per unit effort best reflected differences
Authors
David L. Ward, James H. Petersen, John J. Loch
Spatial and temporal variation in proportional stock density and relative weight of smallmouth bass in a reservoir
Population data for smallmouth bass Micropterus dolomieui in 20,235 ha John Day Reservoir on the Columbia River were used to (1) determine whether Proportional Stock Density (PSD) and Relative Weight (Wr) varied spatially and temporally in two areas of the reservoir with established smallmouth bass fisheries; (2) explore possible causes of any observed variation; and (3) discuss some management im
Authors
Matthew G. Mesa, S.D. Duke, David L. Ward