Editing Rainbow trout (section)

===Freshwater life cycle===
{{multiple image
 | align     = center
 | direction = horizontal

 | image1    = Two pairs adult Steelhead trout and 2 redds March 2013 Stevens Creek.jpg
 | width1    = {{#expr: (140 * 1895 / 1166) round 0}}
 | alt1      = Photo of two pairs of spawning steelhead trout in stream
 | caption1  = Spawning steelhead
 
 | image2    = Rainbowtroutalevinandeggs.JPG
 | width2    = {{#expr: ( 140 * 899 / 546) round 0}}
 | alt2      = line drawing of alevin and eggs
 | caption2  = Eggs in gravel and rainbow trout [[Juvenile fish#Juvenile salmon|alevin]]

 | image3    = Oncorhynchus mykiss 02 by-dpc.jpg
 | width3    = {{#expr: (140 * 3108 / 2082) round 0}}
 | alt3      = Photo of juvenile rainbow trout
 | caption3  = Typical juvenile rainbow trout showing parr marks

 | image4    = Rainbow trout fish onchorhynchus mykiss detailed photography.jpg
 | width4    = {{#expr: ( 140 * 2229 / 1500) round 0}}
 | alt4      = Photo of adult rainbow trout
 | caption4  = Typical adult rainbow trout
}}

Freshwater resident rainbow trout usually inhabit and spawn in small to moderately large, well-oxygenated, shallow rivers with [[gravel]] bottoms. They are native to the [[River#Topographical classification|alluvial]] or freestone streams that are typical tributaries of the Pacific basin but introduced rainbow trout have established wild, self-sustaining populations in other river types such as [[bedrock]] and [[spring creek]]s. Lake-resident rainbow trout are usually found in moderately deep, cool lakes with adequate shallows and vegetation to support the production of sufficient food sources. Lake populations generally require access to gravelly-bottomed streams to be self-sustaining.<ref>{{cite web |url=http://www.dec.ny.gov/outdoor/60290.html |title=Steelhead Fishing in Lake Erie Tributaries |publisher=New York State Department of Environmental Conservation |access-date=2014-02-03}}</ref>

Spawning sites are usually a bed of fine gravel in a [[riffle]] above a pool. A female trout clears a [[Spawn (biology)#Brood hiders|redd]] in the gravel by turning on her side and beating her tail up and down. Female rainbow trout usually produce 2000 to 3000 {{convert|4|to(-)|5|mm|in|frac=32|adj=on}} eggs per kilogram of weight.<ref>{{cite journal |title=Mechanisms Controlling Egg Size and Number in Rainbow Trout ''Oncorhynchus mykiss'' |author1=Tyler, C.R |author2=Pottinger, T.G. |author3=Santos, E. |author4=Sumpter, J.P. |author5=Price, S-A |author6=Brooks, S. |author7=Nagler, J.J. |journal=Biology of Reproduction |volume=54 |year=1996 |pages=8–15 |issue=1 |doi=10.1095/biolreprod54.1.8 |pmid=8837994 |doi-access=free }}</ref> During spawning, the eggs fall into spaces between the gravel, and immediately the female begins digging at the upstream edge of the nest, covering the eggs with the displaced gravel. As eggs are released by the female, a male moves alongside and deposits milt (sperm) over the eggs to fertilize them. The eggs usually hatch in about four to seven weeks although the time of hatching varies greatly with region and habitat. Newly hatched trout are called sac fry or [[Juvenile fish#Juvenile salmon|alevin]]. In approximately two weeks, the [[yolk sac]] is completely consumed, and [[Fry (biology)|fry]] commence feeding mainly on [[zooplankton]]. The growth rate of rainbow trout varies with area, habitat, life history, and quality and quantity of food.<ref name=fwsRainbow>{{cite web |last=Staley|first=Kathryn|author2=Mueller, John |url=http://www.fws.gov/northeast/wssnfh/pdfs/rainbow1.pdf |title=Rainbow Trout (''Oncorhynchus mykiss'') |publisher=U.S. Department of Agriculture |date= May 2000|access-date=2013-12-16}}</ref> As fry grow, they begin to develop "parr" marks or dark vertical bars on their sides. In this juvenile stage, immature trout are often called "parr" because of the marks. These small juvenile trout are sometimes called 'fingerlings' because they are approximately the size of a human finger. In streams where rainbow trout are stocked for sport fishing, but no natural reproduction occurs, some of the stocked trout may survive and grow or "carryover" for several seasons before they are caught or perish.<ref>{{cite web |url=http://dnr.wi.gov/topic/fishing/trout/streamclassification.html |title=Wisconsin Trout Fishing: Trout Stream Classifications |date=2014-01-27 |publisher=Wisconsin Department of Natural Resources |access-date=2014-01-03}}</ref>

{{multiple image
 | align = right
 | direction = vertical
 | width = 200
 | image1=Lake Erie Steelhead.jpg
 | alt1=Photo of Steelhead from Lake Erie
 | caption1=Steelhead from [[Lake Erie]]
 | image2 = Lake Washington Ship Canal Fish Ladder pamphlet - ocean phase Steelhead.jpg
 | alt2 = Drawing of ocean phase of male steelhead
 | caption2 = Male ocean-phase steelhead
 | image3 = Lake Washington Ship Canal Fish Ladder pamphlet - male freshwater phase Steelhead.jpg
 | alt3 = Drawing of freshwater spawning phase of male steelhead
 | caption3 = Male spawning-phase steelhead
}}<!--we now have the bottom two images in here twice, recommend keeping them in the chart, add the captions here to the chart, and deleting them at this location-->