Snake River sockeye salmon captive propagation
Light Experiment data
Dataset Description
This work collected data on the length, weight, and reproductive characteristics of sockeye salmon reared in outside and inside tanks.
Data contact
Bryon Kluver
InPort Dataset Reference
View complete data set metadata: 17948
Snake River Sockeye Salmon Light Dark Study
Table description
This experiment compared the effect of indoor and outdoor lighting on the reproductive characteristics of sockeye salmon reared in a captive broodstock program. Indoor lighting was a mixture of natural lighting filtering through windows and artificial overhead lighting. Outdoor lighting was the product of sunlight passing through a translucent cover on the roof of a tensioned fabric greenhouse structure. Outdoor lighting in the greenhouse was about 80% of ambient sunlight and was about three orders of magnitude higher than the mixed lighting occurring inside the pole building. Fish in both experimental treatments were reared in identical indoor conditions from incubation to the time they would have naturally have reentered freshwater on their return migration from the sea. Maturing fish identified in maturity sorts conducted in late June-early July of each study year were systematically sorted into the two experimental treatments and stocked into the experimental raceways at Burley Creek Hatchery. In 2007, 2008, 2009, 2010 and 2011 these maturing fish were divided into eight similar groups with four groups being stocked into inside raceways and four groups being stocked into outside raceways. Data is also supplied for 2006 when only two inside and six outside raceways were available for the study. Except for lighting the fish were reared and handled similarly. When they were spawned in October and November all adults were assessed for fork length, weight, and ELISA values. The Julian date females spawned as well as the average weight of their green eggs (developed from an individual 10 egg weight sample), total green egg weight, and overall fecundity were determined and recorded. Males were assessed weekly for sperm production with the Julian Date of their first motile milt production recorded, along with their spermatocrit, and slaughtered milt weight. As each female's eggs were split in two lots and fertilized by two different males survival to eye (viability) is based on average survival of the two lots. This average viability was determined for both sexes.
InPort Entity Reference
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Web Service End Point
Metadata Service End Point
Source URL
Preferred Citation
Kluver, Bryon; 01/29/2018. NOAA Fisheries Northwest Fisheries Science Center. Light Experiment data: Snake River Sockeye Salmon Light Dark Study (
Record Number (TEXT)
An indication of the total number of records in the data. Added to help indicate how much data should be expected when accessing or downloading, so end users know if they got all the data.
Sex (TEXT)
Sex of individual spawner with m equal male and f equal female.
The year in which the individual matured and was spawned.
Accessed Date (TEXT)
The date on which this data was accessed or downloaded. Added when data is delivered to record when the data was downloaded.
Treatment (TEXT)
The experimental treatment applied to the fish. Inside designates fish undergoing maturation inside a building with low levels of natural and artificial lighting and Outside designates fish undergoing final maturation in a greenhouse with high levels of natural lighting filtered through a translucent overhead cover.
Source Url (TEXT)
The human interface access point for this data table.
Raceway (TEXT)
Designates number or letter of raceway fish were held in. Inside treatment raceways are given a letter designation and outside treatment raceways are given a numerical designation. Raceway serves as unit of replication in this study.
Preferred Citation (TEXT)
The preferred citation for this data table.
Mean Fork Length (NUMBER)
This is the average Fork Length of based on all fish of a given sex in the raceway. Fork Length is measured from tip of the snout to the fork of the tail in millimeters.
Mean Weight (NUMBER)
This is the average weight based on all fish of a given sex in a raceway. Weight is in grams.
Mean Elisa (NUMBER)
This is the average kidney tissue enzyme-linked immunosorbent assay (ELISA) value for fish within a raceway. The value is reported as optical density (OD) based on the amount of light transmitted through a spectrophotometer.
Mean Final Spermatocrit (NUMBER)
This estimates the density of sperm in seminal fluid. It is a percentage value and represents the average taken for all males in a raceway on the last day they are sampled.
Mean Final Sperm Wt (NUMBER)
This is the weight in grams of all milt extracted from males on their terminal day.
Mean Julian Date First Milt (NUMBER)
This is the julian date that a male first expressed milt. This is an average value for all males in a raceway.
Mean Julian Date Female Spawned (NUMBER)
This is the julian date on which a female was considered to have mature eggs that were ready to be spawned. This is an average value based on the Julian date each female spawned.
Mean % Eyed Egg Survival (NUMBER)
This is the percentage of eggs that survived to the eyed stage. This is an average value for all fish of a given sex in the raceway.
Mean Green Egg Wt (NUMBER)
This is the prefertilization weight, measure in grams, This number is determined for each female based on a 10 egg average. These numbers are then used to determine the average egg weight of all females in a raceway.
Mean Eyed Egg Wt (NUMBER)
This is based on a sample of each females eyed eggs surviving to the eyed stage and is measured in grams. This value is then used in computing the average egg weight of all females in that raceway.
Mean Fecundity (NUMBER)
This value is the mean number of eggs/female in the raceway.


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