Interagency Ecological Program San Francisco Estuary Smelt Larva Survey 2009 – 2019

• Main Authors: Interagency Ecological Program (IEP), Lauren Damon, Trishelle Tempel, Adam Chorazyczewski
• Format: Dataset
• Language: unknown
• Published: Environmental Data Initiative 2020
• Subjects: Interagency Ecological Program for the San Francisco Bay Delta Estuary; Longfin Smelt; Delta Smelt; CDFW Stockton Labs; estuaries; long term monitoring; endangered species; fishes; population dynamics; larvae; turbidity; water temperature; tides; Clevelandia Clevelandia ios; Lepidogobius Lepidogobius lepidus; Percina Percina macrolepida; Lepomis Lepomis macrochirus; Symphurus Symphurus atricaudus; Cyprinus Cyprinus carpio; Ictalurus Ictalurus punctatus; Ilypnus Ilypnus gilberti; Oncorhynchus Oncorhynchus tshawytscha; Hypomesus Hypomesus transpacificus; Parophrys Parophrys vetulus; Menidia Menidia beryllina; Atherinopsis Atherinopsis californiensis; Spirinchus Spirinchus thaleichthys; Gillichthys Gillichthys mirabilis; Gambusia Gambusia affinis; Engraulis Engraulis mordax; Clupea Clupea pallasii; Leptocottus Leptocottus armatus; Porichthys Porichthys notatus; Cottus Cottus asper; Lucania Lucania parva; Lepomis Lepomis microlophus; Catostomus Catostomus occidentalis; Tridentiger Tridentiger bifasciatus; Tridentiger Tridentiger barbatus; Citharichthys Citharichthys stigmaeus; Pogonichthys Pogonichthys macrolepidotus; Micropterus Micropterus punctulatus; Morone Morone saxatilis; Dorosoma Dorosoma petenense; Gasterosteus Gasterosteus aculeatus; Atherinops Atherinops affinis; Hypomesus Hypomesus nipponensis; Ameiurus Ameiurus catus; Genyonemus Genyonemus lineatus; Acipenser Acipenser transmontanus; Acanthogobius Acanthogobius flavimanus; Clevelandia ios; Lepidogobius lepidus; Percina macrolepida; Lepomis macrochirus; Symphurus atricaudus; Cyprinus carpio; Ictalurus punctatus; Ilypnus gilberti; Oncorhynchus tshawytscha; Hypomesus transpacificus; Parophrys vetulus; Menidia beryllina; Atherinopsis californiensis; Spirinchus thaleichthys; Gillichthys mirabilis; Gambusia affinis; Engraulis mordax; Clupea pallasii; Leptocottus armatus; Porichthys notatus; Cottus asper; Lucania parva; Lepomis microlophus; Catostomus occidentalis; Tridentiger bifasciatus; Tridentiger barbatus; Citharichthys stigmaeus; Pogonichthys macrolepidotus; Micropterus punctulatus; Morone saxatilis; Dorosoma petenense; Gasterosteus aculeatus; Atherinops affinis; Hypomesus nipponensis; Ameiurus catus; Genyonemus lineatus; Acipenser transmontanus; Acanthogobius flavimanus; Catostomus catostomus
• Online Access: https://pasta.lternet.edu/package/metadata/eml/edi/534/2

The Interagency Ecological Program San Francisco Estuary Smelt Larva Survey was initiated by the California Department of Fish and Wildlife (CDFW) in 2009 to monitor the distribution and abundance of newly-hatched Longfin Smelt (Spirinchus thaleichthys) in the San Francisco Estuary. Surveys are conducted bi-weekly and sampling begins early January and continues through March. The surveys sample at fixed locations, stations, from Carquinez Strait through Suisun Bay and into the Sacramento-San Joaquin River Delta. Napa River stations were added in 2014. Each survey consists of 44 stations. At each station, one 10 minute stepped-oblique (bottom to top) tow is made following a prescribed tow schedule. The net is a conical 505 microm mesh lashed to a D shaped frame mounted on skis. Larval fish samples are preserved in the field in 10% Formalin and brought back to the CDFW Stockton Lab for identification to species and enumeration under a microscope. Several types of data are collected at each station, in addition to the larval fish sample, including the volume of water sampled by the net, surface water temperature, surface and bottom specific conductance (EC normalized at 25˚C), Secchi disk depth, tow duration, tidal condition, and surface water turbidity.