| In natural streams coho salmon and steelhead trout fry tend to occupy pools and riffles, respectively. |
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| In the Pacific Northwest, several species of Pacific salmon grow in the riffles of cold-flowing rivers far from the sea. |
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| Emerald-headed mallards bob alongside kayakers in the river's riffles of whitewater. |
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| I peered across the chops and riffles and saw the dark backs and tails of a seething school of redfish. |
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| She finishes rehearsal, returns to her rented atelier in Chelsea and riffles through her collection of music. |
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| The bright sun shines in a cloudless sky, and a light breeze riffles the clear waters of an open pool in the sea ice of McMurdo Sound. |
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| The mild rapids turn to riffles and become fewer and fewer from here to the takeout. |
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| Surviving juveniles disperse to the riffles and runs of the river to live on insect larvae and small crustaceans. |
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| Both salmon and trout grow faster in deep, low-velocity pools than in shallow, high-velocity riffles. |
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| Sampling locations were selected based on suitable habitat consisting of gravel and cobble substrates associated with riffles and runs and, to a large extent, accessibility. |
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| We clambered over mossy boulders beneath a canopy of big-leaf maple, bay, and fir, and covered six-tenths of a mile of sparkling riffles and cascades. |
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| We look hopefully at markings on our map like Pablo's Rapid and Dead Man Rapid, but they prove to be little more than riffles and a slight acceleration in the current. |
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| Chub are stream fish, and like other soft-rayed species, are common in more turbulent riffles and races to which they are displaced by predation risk. |
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| Biodiversity of macroinvertebrates in open canopy riffles in the Little Harpeth River, Nashville, Tennessee. |
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| The dust was washed in a small stream of water and the heavy gold dust and gold nuggets collected in riffles. |
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| Riffles are areas of high substrate heterogeneity, and corresponding high areas of macroinvertebrate diversity in streams. |
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