00000cam 2200000zi 4500 9.950508 CaOODSP 20251218112548 m o d f cr cn||||||||| 250428t20252025oncbd ob f000 0 eng d 9780660770499 CaOODSP eng rda CaOODSP eng eng fre n-cn-on Fs97-4/3304E-PDF Gibson, Mandy P., author. Freshwater mussel (Unionidae) timed-search surveys in Medway Creek : the search for Ptychobranchus fasciolaris (Kidneyshell) / by Mandy P. Gibson, Kelly A. McNichols-O'Rourke, and Todd J. Morris. Burlington, ON : Fisheries and Oceans Canada, Ontario and Prairie Region, Great Lakes Laboratory for Fisheries and Aquatic Sciences, 2025. ©2025 1 online resource (vii, 39 pages) : maps, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 1488-5387 ; 3304 Includes bibliographical references (pages 12-18). "Ptychobranchus fasciolaris (Kidneyshell) is currently listed as Endangered under the federal Species at Risk Act (SARA). There have been numerous shell records of P. fasciolaris in the Thames River watershed but only 4 live individuals found. All live captures have occurred in Medway Creek, a tributary of the North Thames River. In 2024, Fisheries and Oceans Canada (DFO) sampled 15 sites throughout Medway Creek to assess the current unionid assemblage and determine if live P. fasciolaris remain. A semi-quantitative timed-search survey was conducted at each site by a three-to six-person team for a total 4.5 person-hour effort. A total of 1534 live mussels of 14 species, including two species at risk (SAR), Cambarunio iris (Rainbow) and Lampsilis fasciola (Wavyrayed Lampmussel), were observed. There were no live P. fasciolaris individuals found, but 3 whole shells and 2 valves were found at three sites. Medway Creek supports a moderately abundant and highly diverse mussel assemblage; however, there are several pollutant tolerant species and the relative abundance of these species has shifted over time. Sites with P. fasciolaris records (live or shell) have intact riparian buffers of >30 m and water temperature was significantly lower at sites with live SAR present compared to sites without live SAR. These data provide an understanding of the current mussel assemblage in Medway Creek and can be used to inform a potential reintroduction of P. fasciolaris to this system"--Abstract, page vi. Includes abstracts in English and French. Kidneyshell Conservation Ontario. Rare mollusks Ontario. Unionidae Variation Ontario. Invertebrate surveys Ontario. Ptychobranche réniforme Conservation Ontario. Mollusques rares Ontario. Unionidés Variation Ontario. Invertébrés Inventaires Ontario. Canada. Department of Fisheries and Oceans. Ontario and Prairie Region, issuing body. Great Lakes Laboratory for Fisheries and Aquatic Sciences, issuing body. Canadian manuscript report of fisheries and aquatic sciences, 1488-5387 ; 3304. (CaOODSP)9.505211 PDF 1.54 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-3304-eng.pdf