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Full-Text Articles in Aquaculture and Fisheries
Rangewide Tidewater Goby Occupancy Survey Using Environmental Dna, Michael Sutter
Rangewide Tidewater Goby Occupancy Survey Using Environmental Dna, Michael Sutter
Cal Poly Humboldt theses and projects
Rangewide monitoring of fish species is critical for determining status and trends in abundance and distribution; however, implementations of large-scale distribution surveys have generally been constrained by time and cost. This study uses environmental DNA (eDNA) to monitor the presence or absence of two endangered tidewater goby species, the northern tidewater goby (Eucyclogobius newberryi) and the southern tidewater goby (Eucyclogobius kristinae), across their combined geographic range that encompasses the entire California coast (1,350 km).A multi-scale occupancy model designed specifically for eDNA methods was used to account for imperfect detection and to estimate true site occupancy. A …
Rediscovering The Maryland Darter (Etheostoma Sellare), Tyler Russell Hern
Rediscovering The Maryland Darter (Etheostoma Sellare), Tyler Russell Hern
Theses, Dissertations and Capstones
The Maryland darter has not been observed since 1988. Historic populations were located in Deer Creek, Swan Creek, and Gashey’s Run all of which occur in the lower Susquehanna drainage. At these locations, specimens were collected or observed at the lowest riffle of the stream. Some researchers suggest this may be a large river darter. The Conowingo Dam complicates surveying below the facility due to the rapid fluctuations in water levels caused by regulation for power production. Surveying efforts included trawling in the mainstem, and visual surveys in the mainstem, and searching/sampling all historically known locations of Etheostoma sellare. During …