Connie Shannon PSMFC/ CDFG Tom Christy CDFG/NR/ERIS vector digital data https://wildlife.ca.gov/Data/BIOS https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/300_399/ds340.zip Winter Steelhead Distribution June 2012 Version This dataset depicts observation-based stream-level geographic distribution of anadromous winter-run steelhead trout, Oncorhynchus mykiss irideus (O. mykiss), in California. It was developed for the express purpose of assisting with steelhead recovery planning efforts. The distributions reported in this dataset were derived from a subset of the data contained in the Aquatic Species Observation Database (ASOD), a Microsoft Access multi-species observation data capture application. ASOD is an ongoing project designed to capture as complete a set of statewide inland aquatic vertebrate species observation information as possible. Please note: A separate distribution is available for summer-run steelhead. Contact information is the same as for the above. ASOD Observation data were used to develop a network of stream segments. These lines are developed by "tracing down" from each observation to the sea using the flow properties of USGS National Hydrography Dataset (NHD) High Resolution hydrography. Lastly these lines, representing stream segments, were assigned a value of either Anad Present (Anadromous present). The end result (i.e., this layer) consists of a set of lines representing the distribution of steelhead based on observations in the Aquatic Species Observation Database. This dataset represents stream reaches that are known or believed to be used by steelhead based on steelhead observations. Thus, it contains only positive steelhead occurrences. The absence of distribution on a stream does not necessarily indicate that steelhead do not utilize that stream. Additionally, steelhead may not be found in all streams or reaches each year. This is due to natural variations in run size, water conditions, and other environmental factors. The information in this data set should be used as an indicator of steelhead presence/suspected presence at the time of the observation as indicated by the 'Late_Yr' (Latest Year) field attribute. The line features in the dataset may not represent the maximum extent of steelhead on a stream; rather it is important to note that this distribution most likely underestimates the actual distribution of steelhead. This distribution is based on observations found in the ASOD database. The individual observations may not have occurred at the upper extent of anadromous occupation. In addition, no attempt was made to capture every observation of O. mykiss and so it should not be assumed that this dataset is complete for each stream. The distribution dataset was built solely from the ASOD observational data. No additional data (habitat mapping, barriers data, gradient modeling, etc.) were utilized to either add to or validate the data. It is very possible that an anadromous observation in this dataset has been recorded above (upstream of) a barrier as identified in the Passage Assessment Database (PAD). In the near future, we hope to perform a comparative analysis between this dataset and the PAD to identify and resolve all such discrepancies. Such an analysis will add rigor to and help validate both datasets. This dataset has recently undergone a review. Data source contributors as well as CDFG fisheries biologists have been provided the opportunity to review and suggest edits or additions during a recent review. Data contributors were notified and invited to review and comment on the handling of the information that they provided. The distribution was then posted to an intranet mapping application and CDFG biologists were provided an opportunity to review and comment on the dataset. During this review, biologists were also encouraged to add new observation data. This resulting final distribution contains their suggestions and additions. Please refer to "Use Constraints" section below. To map steelhead observation based distribution in California. unknown publication date In work Irregular -124.502240 -116.966292 42.098661 33.160824 None inlandWaters Species Recovery environment Oncorhynchus mykiss irideus Winter-run Distribution Salmonid Recovery Planning biota Threatened Species Steelhead ISO 19115 Topic Categories inlandWaters planningCadastre environment biota None South Central California Coast Central Valley Northern California Central California Coast Southern California Coast California Made available with permission of California Department of Fish and Game/Northern Region/Environmental Resources Information Services (CDFG/NR/ERIS). This data is made available with the understanding that it shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means. Please read the metadata document completely prior to use of this dataset. Examples of appropriate uses include: - steelhead recovery planning - Evaluation of future survey sites for steelhead - Validating steelhead distribution models Examples of inappropriate uses include: - Assuming absence of a point feature means that steelhead are not present in that stream. - Using this data to make parcel or ground level land use management decisions. - Using this dataset to prove or support non-existence of steelhead at any spatial scale. - Assuming that the point feature represents the maximum possible extent of steelhead range.License: This work is licensed under Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). Using the citation standards recommended for BIOS datasets (https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS) satisfies the attribution requirements of this license.Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data. California Department of Fish and Game Northern Region Environmental Resources Information Services 530-225-2155 530-225-2276 Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 Attributes in this dataset are designed to be objective. When appropriate, automated processes have been used to calculate attribute values. No statistical or other manipulative analysis has been performed on any fields. It is impingent upon the data compiler to accurately represent the contributed data under the guidelines and constraints of the project methodologies. The distribution has undergone a review process. Some data were not reviewed and therefore the dataset varies in accuracy. ASOD Observation data were used to develop a network of stream segments. These lines are developed by "tracing down" from each observation to the sea using the flow properties of USGS National Hydrography Dataset (NHD) High Resolution hydrography. This dataset represents stream reaches that are known or believed to be used by steelhead. As explained above, this dataset displays stream reaches based on points where anadromous steelhead observations have been reported, hence it contains positive occurance only. However, steelhead may not be found on an annual basis on these reaches due to natural variations in run size, water conditions, and other environmental factors. The information in this data set should be used as an indicator of steelhead presence/suspected presence at the time of the observation; it does not necessarily verify that steelhead are currently present. Conversely, the absence of distribution on a stream does not necessarily indicate that steelhead do not utilize that stream. The line features in the dataset may not represent the maximum extent of steelhead on a stream; rather it is important to note that this most likely underestimates the actual distribution of steelhead. This distribution is based on observations found in the ASOD database. The individual observations may not have occurred at the upper extent of anadromous occupation. In addition, no attempt was made to capture every observation of O. mykiss and so it should not be assumed that this dataset is complete for each stream. Features mapped to USGS National Hydrography Dataset High Resolution hydrography unless otherwise noted. Every attempt has been made to accurately represent observation based distribution on this hydrography. Details on processes used to achieve the best possible observation locations included in Aquatic Species Observation Database project documentation. Edited metadata (added ISO keywords, modified title). 20110201 California Department of Fish and Game Will Patterson geodata@dfg.ca.gov Vector String 9225 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds340 Steelhead Distribution for California ASOD OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Early_Yr Earliest Year. The Observation Year for the earliest observation upstream from the current stream segment ASOD Late_Yr Latest Year. The Observation Year for the latest observation upstream from the current stream segment. GNIS_ID GNIS ID. Unique id for the stream given by the Geographic Names Information System. Used for Reference only. GNIS GNIS_Name GNIS Name. Stream/River name as indicated by USGS Geographic Names Information System. Used for reference and query purposes. Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. California Department of Fish and Game 530-225-2276 tchristy@dfg.ca.gov See access and use constraints information. 20231027 Pacific States Marine Fisheries Commission Connie Shannon Fisheries Data Management Specialist mailing and physical

2440 Athens Ave.

CA Dept. of Fish and Game

Redding CA 96001 530-225-2155 cshannon@dfg.ca.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time