Obstructions to Fish Passage

2 pages
43 views

Please download to get full document.

View again

of 2
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Share
Description
Critical Times for Fish Passage in the San Lorenzo River Watershed ◆ November through May i aciia pro frautseledtotad s rtcl eid o dl teha ru n coho salmon passage. From the moment stream flow breaches the sand bar at the ocean, adults may begin to swim up river to spawn. ◆ February through June i ac i i a p r o w e j v n l f s ( a l ds o t ) s rtcl eid hn ueie ih cle mls migrate from the streams to the ocean. Steelhead trout live in freshwater streams for ter frt 14 yas wie ch slo sa i hi is -
Tags
Transcript
  Fish Passage ProblemsFish Passage ProblemsFish Passage ProblemsFish Passage ProblemsFish Passage ProblemsAssociated with ImproperlyAssociated with ImproperlyAssociated with ImproperlyAssociated with ImproperlyAssociated with ImproperlyInstalled Culverts:Installed Culverts:Installed Culverts:Installed Culverts:Installed Culverts: ◆   Water inside culvert is too shallow during fishmigration. ◆ Culvert outlet is perched above thestreambed. ◆ Movement of water inside the culvert is toofast.Santa Cruz CountySanta Cruz CountySanta Cruz CountySanta Cruz CountySanta Cruz CountyResources Conservation DistrictResources Conservation DistrictResources Conservation DistrictResources Conservation DistrictResources Conservation District The Santa Cruz County Resource ConservationDistrict (SCCRCD) is a non-regulatory, non-for -profit entity. The mission of the SCCRCD is tohelp people protect, conserve, and restore naturalresources through information, education, andtechnical assistance programs. The District providesan active program for the conservation of soil, water,plant, and wildlife resources in Santa Cruz County. Informational ResourcesInformational ResourcesInformational ResourcesInformational ResourcesInformational ResourcesSanta Cruz CountyResource Conservation District(831) 464-2950Natural Resources Conservation Service (831) 475-1967www.nrcs.usda.govCounty of Santa Cruz Planning Department   (831) 454-2580 www.co.santa-cruz.ca.usCalifornia Department of Fish and Game (831) 649-2870www.dfg.ca.govNational Marine Fisheries Service   www.nmfs.noaa.govArmy Corps of Engineers www.spn.usace.army.milUnited States Fish and Wildlife Servicewww.fws.gov This brochure has been produced by theThis brochure has been produced by theThis brochure has been produced by theThis brochure has been produced by theThis brochure has been produced by theSanta Cruz County Resource ConservationSanta Cruz County Resource ConservationSanta Cruz County Resource ConservationSanta Cruz County Resource ConservationSanta Cruz County Resource ConservationDistrict with Senate Bill 271 funds provided District with Senate Bill 271 funds provided District with Senate Bill 271 funds provided District with Senate Bill 271 funds provided District with Senate Bill 271 funds provided by California Department of Fish and Game.by California Department of Fish and Game.by California Department of Fish and Game.by California Department of Fish and Game.by California Department of Fish and Game. Critical Times for Fish PassageCritical Times for Fish PassageCritical Times for Fish PassageCritical Times for Fish PassageCritical Times for Fish Passagein the San Lorenzo Riverin the San Lorenzo Riverin the San Lorenzo Riverin the San Lorenzo Riverin the San Lorenzo RiverWatershedWatershedWatershedWatershedWatershed ◆ November through MayNovember through MayNovember through MayNovember through MayNovember through May is a critical period for adult steelhead trout andcoho salmon passage. From the moment streamflow breaches the sand bar at the ocean, adultsmay begin to swim up river to spawn. ◆ February through JuneFebruary through JuneFebruary through JuneFebruary through JuneFebruary through June is a critical period when juvenile fish (called smolts)migrate from the streams to the ocean.Steelhead trout live in freshwater streams fortheir first 1-4 years, while coho salmon stay infreshwater streams for just their first year. ◆ June through OctoberJune through OctoberJune through OctoberJune through OctoberJune through October is a critical period for juvenile fish as they seekfavorable conditions within and amongstreams. Photo provided by Swanson Hydrology & Geomorphology What Can You DoWhat Can You DoWhat Can You DoWhat Can You DoWhat Can You Doto Improve Fish Passage?to Improve Fish Passage?to Improve Fish Passage?to Improve Fish Passage?to Improve Fish Passage? You can be aware of the issue and participate inprojects to restore fish passage. There are manyopportunities to participate in local watershedgroups and to attend local watershed educationalworkshops. A local non-profit organization iden-tified more than 20 human-made migration im-pediments on the mainstem of the San LorenzoRiver between the Felton Covered Bridge andthe Waterman Gap Culvert during 2001. Mostof those were legacy structures serving no use-ful purpose. Each of the impediments can bemodified to improve fish passage.You can include provisions for fish passage whenplanning new alterations to the river bed or banks.Local resource professionals and permittingagencies (see list of Informational Resources onthe last page of this brochure) will provide perti-nent guidelines. By seeking out the appropriatetechnical assistance you can minimize your im-pacts while you enjoy the river.It is important to note that any type of dam put inthe San Lorenzo River or it’s tributaries, be it aflashboard dam or a small rock dam, requires apermit consultation with the California Depart-ment of Fish and Game. Common Human-MadeCommon Human-MadeCommon Human-MadeCommon Human-MadeCommon Human-MadeFish Passage Impediments in theFish Passage Impediments in theFish Passage Impediments in theFish Passage Impediments in theFish Passage Impediments in theSan Lorenzo River WatershedSan Lorenzo River WatershedSan Lorenzo River WatershedSan Lorenzo River WatershedSan Lorenzo River Watershed ◆ Road crossings, particularly culverts. ◆ Permanent and seasonal dams. ◆ Structures installed to control stream gradient. salmonid life cyclesalmonid life cyclesalmonid life cyclesalmonid life cyclesalmonid life cycle   S  an t   a Cr  uz  C o un t   yR e  s  o ur  c  e  C on s  e r  v a t  i   onDi   s  t  r i   c  t   8 2  0 B a yA v e n u e  , S  ui   t   e 1  0  7  C ai   t   ol   a  CA 9  5  0 1  0  The San Lorenzo River watershed is habitatfor steelhead trout and coho salmon.Anecdotes and estimates of fishing successsuggest that steelhead trout and coho salmonwere once plentiful in the watershed, and theSan Lorenzo River was once described as oneof the largest steelhead-producing rivers southof the Russian River. Steelhead trout andcoho salmon populations began to decline inthe 1960’s. Steelhead trout are now listed as threatened  under the Federal EndangeredSpecies Act (ESA). Coho salmon are listedas threatened  under the Federal ESA and as endangered  under the California ESA. Thedecline of these fishes has been attributed tosedimentation, use of stream flow, andobstructions to migration. Compared to theefforts necessary to reduce sedimentation andconserve stream flow, elimination ofobstructions to migration is simple and therewards are immediately obvious. THETHETHETHETHESAN LORENZO RIVERSAN LORENZO RIVERSAN LORENZO RIVERSAN LORENZO RIVERSAN LORENZO RIVERWATERSHEDWATERSHEDWATERSHEDWATERSHEDWATERSHEDWhat are the Effects ofWhat are the Effects ofWhat are the Effects ofWhat are the Effects ofWhat are the Effects ofImpediments on MovementImpediments on MovementImpediments on MovementImpediments on MovementImpediments on MovementofofofofofAdultAdultAdultAdultAdultFish?Fish?Fish?Fish?Fish? ◆ Disrupt spawning migrations.  ◆ Under-utilization of tributary habitat.  ◆ Over-crowding of available spawninghabitat.  ◆ Increased stress, injury, or predation/poaching. ◆ Less separation of competing species. coho salmoncoho salmoncoho salmoncoho salmoncoho salmon steelhead troutsteelhead troutsteelhead troutsteelhead troutsteelhead trout What are the Effects ofWhat are the Effects ofWhat are the Effects ofWhat are the Effects ofWhat are the Effects ofImpediments on MovementImpediments on MovementImpediments on MovementImpediments on MovementImpediments on MovementofofofofofJuvenileJuvenileJuvenileJuvenileJuvenileFish?Fish?Fish?Fish?Fish? ◆ Limit or prevent use of over-winteringhabitat in tributaries. ◆ Increase predation. ◆ Limit or prevent summer migration fromthermally-stressed mainstems to coolwaterrefugia. Why is Fish Passage ImportantWhy is Fish Passage ImportantWhy is Fish Passage ImportantWhy is Fish Passage ImportantWhy is Fish Passage Importantfor Steelhead Troutfor Steelhead Troutfor Steelhead Troutfor Steelhead Troutfor Steelhead Troutand Coho Salmon?and Coho Salmon?and Coho Salmon?and Coho Salmon?and Coho Salmon? ◆ To allow their yearly spawning migration. ◆ To maximize available spawning and rearinghabitat.  ◆ To diversify populations and genetics.  ◆ To reduce competition among differentspecies for limited resources.  ◆ To find favorable over-wintering habitat.  ◆ To find food.  ◆ To find relatively cool and well-oxygenatedwater, particularly during summer. ObstructionsObstructionsObstructionsObstructionsObstructionstototototoFish PassageFish PassageFish PassageFish PassageFish Passage In theIn theIn theIn theIn theSan Lorenzo River San Lorenzo River San Lorenzo River San Lorenzo River San Lorenzo River Watershed Watershed Watershed Watershed Watershed  Santa CruzSanta CruzSanta CruzSanta CruzSanta Cruz  CountyCountyCountyCountyCountyMap provided byMap provided byMap provided byMap provided byMap provided by Swanson Hydrology & GeomorphologySwanson Hydrology & GeomorphologySwanson Hydrology & GeomorphologySwanson Hydrology & GeomorphologySwanson Hydrology & Geomorphology
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks