Map showing potential steelhead spawning habitat in the Santa Ynez watershed. Gibraltar Dam (lower right) completely blocks fish migration to the river's headwaters, including Mono and Agua Caliente Creeks.
English: Title: Bulletin - Southern California Academy of Sciences Identifier: bulletinsouth11132012sout (find matches) Year: 1902 (1900s) Authors: Southern California Academy of Sciences Subjects: Science Publisher: Los Angeles : Southern California Academy of Sciences Contributing Library: Smithsonian Libraries Digitizing Sponsor: Biodiversity Heritage Library View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: ' Text Appearing After Image: Intrinsic Potential Steelhead Spawning & Rearing Habitat â¢^^^ Below Bradbury Dam (270 stream miles) Between Bradbury and Gibraltar Dams (211 stream miles) âââ Between Gibraltar and Juncal Dams (234 stream miles) Above Juncal Dam (10 stream miles) Streams (1.100,000 scale) I I Santa Ynez Watershed : County Boundary â Dams I Scale; 1:500.000 NOAA-NMFS-SWR-Long Beach July 2012 Data Source: Boughton and Goslln 2006 NOAA-TM-NMFS-SWFSC-391 Boughton el al 2006 NOAA-TM-NMFS-SWFSC-394 Fig. 4. Potential steelhead spawning and rearing habitat within the Santa Ynez River watershed modeled and mapped using the "envelope method". As part of the National Marine Fisheries Services recovery planning process for the ESA listed endangered southern California steelhead, an effort was made, using the "envelope method", to determine the historic location, distribution, and extent of suitable steelhead habitat (particularly over-summering rearing habitat) within the species' range (Boughton and Goslin 2006). The envelop method is based on information on observed associations between fish distributions and the values of environmental factors such as stream gradient, summer mean discharge and air temperature, valley width to mean discharge, and the presence of alluvial deposits which are essential to steelhead spawning and rearing. One major refinement of the Shapovalov depiction of historic steelhead habitat resulting from the envelope method analysis is identification of the majority of the over-summering habitat in the east (upper) half of the Santa Ynez watershed, upstream of the current site of Cachuma Reservoir. California Legislature passed its first law regulating the salmon industry, and nine years later, it adopted its first regulations for recreational trout fishing. In 1870 California became the first state, along with New Hampshire, to establish a Board of Fish Commissioners charged with the maintenance of the state's fishery resources. Eight years later, the Board's responsibilities expanded to include terrestrial game. Over the next quarter century, the Legislature passed dozens of additional fish and game codes, including a controversial 1913 requirement that all anglers over the age of 18 purchase fishing licenses (Ventura Free Press 1878; The Ojai 1892; Los Angeles Times 1893, 1895a, 1903a, 1907, 1908, 1909b; New York Times 1895; Ventura Weekly Democrat 1897; Ventura Free Press 1907; Oxnard Courier 1919b, 1919c, 1919d, 1919e, 1919f; Leitritz 1970). Throughout this period, the Board focused its efforts on artificial propagation, species introductions, and law enforcement; however, its principal goal was to increase the Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.