General documents pertaining to Bay Delta IEP Fall Midwater TrawlCDFW Data Portal RSS Feed GeneratorWed, 14 Jan 2026 12:14:50 -0800https://nrm.dfg.ca.gov/documents/ContextDocs.aspx?cat=R3-FallMidwaterTrawlBay Delta IEP Fall Midwater Trawl DocumentsCalifornia Department of Fish and Wildlife Data Portal120https://nrm.dfg.ca.govCalifornia Department of Fish and Wildlife Data Portalhttps://nrm.dfg.ca.gov/images/ca_dfg/CDFW-Insignia-146x193.png85en-usSearch Documentshttps://nrm.dfg.ca.gov/documents/ContextDocs.aspx?cat=R3-FallMidwaterTrawlsearchSearchdelta smelt, longfin smelt, striped bass, threadfin shad, American shad, wakasagi - Annual indices240004:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=240004Wed, 14 Jan 2026 12:14:50 -08002026-01-14T00:00:00Memorandum: 2025 FMWT Annual Fish Abundance and DistributionIndex summary - Fall Midwater Trawl midseason (September-November) index memo.239888:1https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=239888Tue, 06 Jan 2026 09:20:15 -08002025-12-22T00:00:00Memorandum: 2025 FMWT September-November Fish Abundance and DistributionSummary of the 2024 season catch and habitat conditions. 235750:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=235750Tue, 23 Sep 2025 11:45:03 -07002025-09-23T00:00:00FMWT 2024 Survey Summarydelta smelt, longfin smelt, striped bass, threadfin shad, American shad, wakasagi - 228035:4https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=228035Mon, 19 May 2025 12:37:22 -07002025-05-19T00:00:00Memorandum: 2024 FMWT Annual Fish Abundance and Distribution - Revision222338:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=222338Tue, 30 Apr 2024 16:10:12 -07002024-04-26T00:00:00FMWT 2023 Survey Summary219831:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=219831Wed, 31 Jan 2024 11:04:21 -08002024-01-31T00:00:00Memorandum: 2023 FMWT Annual Fish Abundance and Distribution218436:7https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=218436Tue, 02 Jan 2024 09:33:03 -08002023-12-27T00:00:00Memorandum: 2023 FMWT September-December Delta Smelt and Longfin Smelt Abundance and DistributionLongfin Smelt - FMWT 2023 Midseason Memo218072:3https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=218072Tue, 02 Jan 2024 09:30:32 -08002023-11-22T00:00:00Memorandum: 2023 FMWT September-November Fish Abundance and Distribution195783:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=195783Mon, 17 Apr 2023 09:46:03 -07002021-11-30T00:00:00Memorandum: 2021 FMWT Delta Smelt Recovery Index186271:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=186271Mon, 17 Apr 2023 09:04:25 -07002020-12-30T00:00:00Memorandum: Fall Midwater Trawl 2020 Annual Fish Abundance Summary184789:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=184789Mon, 17 Apr 2023 08:59:26 -07002020-11-23T00:00:00Memorandum: 2020 FMWT Delta Smelt Recovery Index184788:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=184788Mon, 17 Apr 2023 08:59:25 -07002020-11-23T00:00:00Memorandum: 2020 FMWT September-October Fish Abundance and Distribution175813:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=175813Mon, 17 Apr 2023 04:06:25 -07002020-01-15T00:00:00Memorandum: Fall Midwater Trawl 2019 Annual Fish Abundance Summary175003:5https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=175003Mon, 17 Apr 2023 02:35:37 -07002019-10-31T00:00:00Memorandum: 2019 FMWT September-October Fish Abundance and Distribution164097:5https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=164097Mon, 17 Apr 2023 00:45:54 -07002019-01-09T00:00:00Memorandum: Fall Midwater Trawl 2018 Annual Fish Abundance Summary210695:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=210695Wed, 15 Feb 2023 14:30:54 -08002023-02-15T00:00:00FMWT 2022 Survey Summary209101:1https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=209101Tue, 03 Jan 2023 09:36:00 -08002022-12-29T00:00:00Memorandum: 2022 FMWT Annual Fish Abundance and Distribution207513:3https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=207513Tue, 27 Dec 2022 11:00:28 -08002022-12-01T00:00:00Memorandum: 2022 FMWT September-November Fish Abundance and DistributionThe Fall Midwater Trawl (FMWT) Survey has been conducted near continuously since 1967 to assess the abundance and distribution of pelagic fish species throughout the San Francisco Bay/Sacramento-San Joaquin estuary (Bay Delta). For most of this period, sampling 100 core stations provided data for abundance and distribution analyses. Another 22 (non-core) stations were added to the FMWT 8 to 28 years ago to supplement the original 100 (core) stations. However, relative abundance indices are published annually from only the data collected at the core stations. Here we incorporate data from non-core stations along with core station data to calculate an alternative index that also integrates modern estimates of water volume within the Bay Delta into an index calculation. The use of data from non-core stations in calculating the alternative index was particularly useful for American Shad (Alosa sapidissima) and Threadfin Shad (Dorosoma petenense). Consistently high catches at non-core stations for a couple species and modest catches for a couple additional species highlight the value of these additional catch data for our understanding of how fishes are distributed in the estuary.207395:1https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=207395Wed, 23 Nov 2022 12:29:10 -08002022-11-22T00:00:00Incorporating expanded sampling into an alternative abundance index for the Fall Midwater Trawl survey199043:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=199043Thu, 24 Feb 2022 13:47:54 -08002022-02-24T00:00:00FMWT 2021 Survey Summary195999:1https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=195999Tue, 21 Dec 2021 15:31:38 -08002021-12-16T00:00:00Memorandum: 2021 FMWT September-October Fish Abundance and Distribution - Revision195998:1https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=195998Tue, 21 Dec 2021 15:04:58 -08002021-12-21T00:00:00Memorandum: 2021 FMWT Annual Fish Abundance and Distribution193627:2https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=193627Wed, 28 Jul 2021 09:02:18 -07002021-07-27T00:00:00FMWT 2020 Survey Summary