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Oncorhynchus mykiss irideus pop. 11
<br />steelhead - Central Valley DPS
<br />Element Code:AFCHA0209K
<br />Federal:
<br />State:
<br />Threatened
<br />None
<br />Listing Status:CNDDB Element Ranks:Global:
<br />State:
<br />G5T2Q
<br />S2
<br />Other:AFS_TH-Threatened
<br />General:POPULATIONS IN THE SACRAMENTO AND SAN JOAQUIN RIVERS AND THEIR TRIBUTARIES.
<br />Micro:
<br />Habitat:
<br />92609EO Index:25Occurrence No.91542Map Index:2013-XX-XXElement Last Seen:
<br />2013-XX-XXSite Last Seen:PoorOcc. Rank:
<br />Natural/Native occurrenceOcc. Type:
<br />Presumed ExtantPresence:
<br />UnknownTrend:2014-02-27Record Last Updated:
<br />Poso Farm (3612084), Oxalis (3612085), Santa Rita Bridge (3712015), Delta Ranch (3712016), Turner Ranch (3712026), San Luis
<br />Ranch (3712027), Stevinson (3712037), Gustine (3712038), Hatch (3712048), Crows Landing (3712141), Brush Lake (3712151),
<br />Westley (3712152), Ripon (3712162), Vernalis (3712163), Lathrop (3712173)
<br />Quad Summary:
<br />Fresno, Madera, Merced, San Joaquin, StanislausCounty Summary:
<br />37.80528 / -121.31601Lat/Long:
<br />Zone-10 N4185547 E648244UTM:
<br />T01S, R06E, Sec. 33 (M)PLSS:
<br />non-specific areaAccuracy:
<br />Elevation (ft):
<br />14775.0Acres:
<br />LOWER SAN JOAQUIN RIVER, FROM THE MOSSDALE TRAWL SITE (RM 54) TO SACK DAM (RM 182).Location:
<br />SMOLTS CAUGHT AT MOSSDALE (MAIN POINT OF ENTRY INTO DELTA) SINCE 1968. BARRIER OPERATED AT HILLS FERRY
<br />(RM 118) SINCE 1992 DIVERTS MIGRATING FISH INTO MERCED R. SACK DAM, IMPASSABLE IN LOW-WATER YEARS, IS
<br />PRACTICAL U/S LIMIT TO MIGRATION.
<br />Detailed Location:
<br />STEELHEAD (SH) WIDELY CONSIDERED EXTIRPATED S OF MERCED R; BUT 2012-13 INVENTORY FOUND O. MYKISS
<br />ABOVE HILLS FERRY BARRIER, WHICH MAY NOT BE FISH-TIGHT. DESPITE 2006 FLOW SETTLEMENT, "LOW VIABILITY"
<br />FOR SH DUE TO LACK OF REARING HABITAT.
<br />Ecological:
<br />YEARLY CATCH AT MOSSDALE TRAWL 0-41 (AVG 8), 1994-2011; MOSLTY UNCLIPPED SMOLTS. NO SH DET ABOVE RM 118
<br />DURING SH MONITORING BEGUN 2012 (BUT FISH ASSEMBLAGE INVENTORY FOUND TROUT). 2 OF 6 SMOLTS SAMPLED IN
<br />'08 OTOLITH STUDY WERE SH PROGENY.
<br />General:
<br />UNKNOWNOwner/Manager:
<br />92687EO Index:27Occurrence No.91603Map Index:2012-05-07Element Last Seen:
<br />2012-05-07Site Last Seen:UnknownOcc. Rank:
<br />Natural/Native occurrenceOcc. Type:
<br />Presumed ExtantPresence:
<br />DecreasingTrend:2014-02-27Record Last Updated:
<br />Lathrop (3712173), Stockton West (3712183), Holt (3712184), Woodward Island (3712185), Terminous (3812114), Bouldin Island
<br />(3812115), Jersey Island (3812116), Antioch North (3812117), Honker Bay (3812118), Thornton (3812124), Isleton (3812125), Rio
<br />Vista (3812126), Courtland (3812135), Liberty Island (3812136), Florin (3812144), Clarksburg (3812145)
<br />Quad Summary:
<br />Contra Costa, Sacramento, San Joaquin, Solano, YoloCounty Summary:
<br />38.10457 / -121.59990Lat/Long:
<br />Zone-10 N4218343 E622752UTM:
<br />T03N, R03E, Sec. 13 (M)PLSS:
<br />non-specific areaAccuracy:
<br />Elevation (ft):
<br />55159.0Acres:
<br />SACRAMENTO-SAN JOAQUIN DELTA, FROM CHIPPS ISLAND TO SAN JOAQUIN R AT DOS REIS(RM51) & SACRAMENTO R
<br />AT GARCIA BEND(RM49).
<br />Location:
<br />AREA OF DELTA MAPPED INCLUDES 19 BEACH SEINE SITES AT WHICH STEELHEAD WERE REGULARLY DETECTED, 1976-
<br />2012; VARIOUS MIDWATER TRAWL SITES SAMPLED 1968-2005; AND THE CHIPPS ISLAND TRAWL SITE, OPERATED SINCE
<br />1976.
<br />Detailed Location:
<br />LOWER RIVERS & DELTA MOSTLY UNSUITABLE FOR REARING DUE TO HIGH WATER TEMPS; FUNCTION MAINLY AS
<br />MIGRATORY CORRIDOR. 2012 TELEMETRY STUDY SHOWED MAIN JUVENILE EMIGRATION ROUTE THROUGH MAINSTEM
<br />SACRAMENTO R; & MIGRATORY SUCCESS LESS THAN 25%.
<br />Ecological:
<br />ANNUAL SEINE CATCH 1-136 (HIGH IN 1995) SINCE 1976; OVER 90% HATCHERY-ORIGIN (HO) FROM 2000-2012. CHIPPS
<br />TRAWL CATCH 9-488 (HIGH IN '95); %HO INCREASED FROM 2000-12. ANALYSIS SUGGESTS PRODUCTION OF 100-300K
<br />WILD SMOLTS/YR; MAY BE DECLINING.
<br />General:
<br />UNKNOWN, DFG, TNCOwner/Manager:
<br />Report Printed on Friday, March 26, 2021
<br />Page 25 of 36Commercial Version -- Dated February, 28 2021 -- Biogeographic Data Branch
<br />Information Expires 8/28/2021
<br />Multiple Occurrences per Page
<br />California Department of Fish and Wildlife
<br />California Natural Diversity Database
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