Lengths [U.S. Fish and Wildlife Service] Full Details

Full Details

Title:

Lengths [U.S. Fish and Wildlife Service]

Description:

The U.S Fish and Wildlife Services (USFWS) Lower Great Lakes Fish and Wildlife Conservation Office (LGLFWCO) Aquatic Invasive Species (AIS) program conductsEurasian Ruffe (Gymnocephalus cernua) bottom trawlsurveys annually. Dedicated Ruffe surveillanceoccurs across harbors and ports of the Great Lakes with the intent ofdetectingRuffe range expansions. The LGLFWCO began conducting Ruffe surveys in 1994 and continue this effort to present day, excluding 2020 due to COVID-19 restrictions which prevented sampling for that year. LGLFWCO Ruffe sampling focuses on harbors and ports of the lower Great Lakes (Erie and Ontario) and has included the following locations: Toledo (Ohio), Sandusky(Ohio), Cleveland(Ohio), Ashtabula(Ohio), Conneaut(Ohio), Erie (Pennsylvania), Buffalo (New York), and Rochester (New York).All LGLFWCO Ruffe sampling is conducted using bottom trawls (4.9 m headrope) and intends to sample the benthic fish community. Sampling locations are visited biannually (spring and fall) and trawls occur at historical trawling transects denoted for each port or harbor. Although each location is sampled biannually, there is some variability in the seasonality of surveys - this can be made apparent in the water temperatures collected during sampling events. Although the primary objective of these surveys is to search for Ruffe, many native and non-native (i.e. Round Goby) species are collected. Similar to our Early Detection and Monitoring (EDM) program, all fish collected during the trawls are counted and identified to species in the field using taxonomic keys. If an identification cannot be made in the field, the specimen or some of its tissue is preserved using 95% ethanol (EtOH) and identifications are made in the laboratory either taxonomically or genetically (recent survey years; Northeast Fishery Center). A subset of individuals from each species are measured (total length; mm) in the field. Any significant AIS detections are reported to partners following an internal communications protocol.The information within this dataset is geospatial in nature and documents Ruffe trawling sampling events. Both abiotic and biotic data is collected for each individual trawling event. It is possible that over time, variations in the trawling protocol (duration, speed, warp length, etc.) have been modified which could influence the effectiveness of the trawl. Also, although infrequent, some fish identifications within this data set may be inaccurate and without photographs or preservation of the individual to confirm identification, those records will remain within this data set unless otherwise detected and removed.

Creator:

{'name': 'Department of the Interior'}

Provider:

U.S. Fish and Wildlife Service Open Data

Resource Class:

Datasets and Web services

Temporal Coverage:

Last modified 2022-03-14

Date Issued:

2021-03-11

Place:

United States

Rights:

The United States Fish and Wildlife Service (Service) shall not be held liable for improper or incorrect use of the data described and/or contained herein. While the Service makes every reasonable effort to ensure the accuracy and completeness of data provided for distribution, it may not have the necessary accuracy or completeness required for every possible intended use. The Service recommends that data users consult the associated metadata record to understand the quality and possible limitations of the data. The Service creates metadata records in accordance with the standards endorsed by the Federal Geographic Data Committee.As a result of the above considerations, the Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of the data. It is the responsibility of the data user to use the data in a manner consistent with the limitations of geospatial data in general and these data in particular. Although these data have been processed successfully on a computer system at the Service, no warranty, expressed or implied, is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the Service and are provided on the condition that neither the Service nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data. This applies to the use of the data both alone and in aggregate with other data and information.

Access Rights:

Public

Format:

Shapefile

Language:

English

Date Added:

2024-11-21