Constarium
← Search

Data · collection

Fish fork length data from CGOA trawl cruises conducted from 1997-2004

Listed in NASA Earthdata CMR

Fish fork length data were collected from the towing of gillnets, midwater trawls and Nordic 264 surface rope trawls.

Description

Sampling was conducted during the period 10 October 1997 to 17 September 2004 during cruises onboard the Pandalus. The survey area included the coastal waters of the Gulf of Alaska.

The classification of salmon lifestages follows information from Nancy Davis and from her high seas catch (lengths and ages) data: coho <375mm = juvenile coho >375mm = maturing pink <375mm = juvenile pink >375mm = maturing The categories for sockeye, chinook, and chum are more difficult to determine and are based on length frequencies as well as age/length data from the high seas cruise of Nancy Davis. sockeye <235mm = juvenile sockeye >235mm = immature/maturing The minimum fork length of a sockeye (ocean age 1) was 231mm in Nancy Davis' high seas data (2001); most were ~300mm chinook>300mm = immature/maturing chum<270mm = juvenile chum>270mm = immature/maturing The minimum fork length of a chum (ocean age 1) was 280mm in Nancy Davis' high seas data (2001); most were ~300-350mm.

Links

Get the data

Catalogue records · 2

Topics

Provenance · 1 source records, 15 field assertions
SourceKeyLast seenRaw
NASA Earthdata CMRC1214594392-SCIOPS9 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:gillnetssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:midwater-trawlssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:trawlsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/fish/ray-finned-fishessource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/fish/ray-finned-fishes/salmons-troutssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/biosphere/ecosystems/marine-ecosystemssource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/oceans/aquatic-sciences/fisheriessource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:r-v-pandalussource · NASA CMRconnector:nasa_cmr@1.0.0
descriptionsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/Abstract
license_textsource · NASA CMRconnector:nasa_cmr@1.0.0
spatialsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/SpatialExtent
temporalsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/TemporalExtents
titlesource · NASA CMRconnector:nasa_cmr@1.0.0/umm/EntryTitle
version_labelsource · NASA CMRconnector:nasa_cmr@1.0.0