7743 - Laserfiche WebLink

Home Browse Search

k IN REPLY REFER TO: United States Department of the Interior FISH AND WILDLIFE SERVICE MAILING ADDRESS: STREET LOCATION.. Post Office Box 25486 134 Union Blud. Denver Federal Center Lakewood, Colorado 80228 Denver, Colorado 80225 FWE/SE/Upper Colorado River Basin Mail Stop 60153 JUN 19 1990 9 Memorandum To: Management Group and Consultants Technical Group and Consultants/Interested Parties Bio/Rag Recovery Team Tom Chart Lee Carlson Ned Andrews Jim O'Brien Wayne Hubert and Consultants From: .11r Assistant Regional Director, Fish and Wildlife Enhancement, Region 6 . .. Subject: Compendium of Existing Knowledge for use in Making Habitat Management Recommendations for the Upper Colorado River Basin Attached please find a copy of the compendium. Begun in 1989, the project involved compilation of "key" information pertaining to rare fish species' needs as compared to past, present, and future environmental conditions. The rare fishes of the Upper Colorado River Basin have certain physical, chemical, and biological habitat needs which apparently are not being met in certain areas. The thinking was that if we could identify and quantify those needs, then we would be better able to provide for them to recover the fishes. "Key" information was considered to be that which could be translated into activities which would help to recover the fishes, or which could be used to assess impacts of existing or proposed actions likely to affect the fishes. The compendium is divided into categories of variables thought to be important to riverine fishes. For each variable, information was sought to define the ranges of values which are beneficial vs. those which are detrimental to the species. Armed with such information, one should be able to assess the relative suitability of habitat at a given locale, assess or predict impacts of proposed projects, and identify research needs to address missing information. There are, no doubt, important variables (and interactions among variables) that have been overlooked and are necessary to develop a complete picture. Any thoughts you may have on important controlling variables and/or limiting factors would be appreciated.