FN Archimer Export Format PT J TI Evaluation of oyster sampling efficiency of patent tongs and an oyster dredge BT AF CHAI, Ai-Ling HOMER, Mark TSAI, Chu-Fa GOULLETQUER, Philippe AS 1:;2:;3:;4:; FF 1:;2:;3:;4:PDG-DP2S; SI NANTES SE PDG-DP2S TC 0 UR https://archimer.ifremer.fr/doc/1992/publication-3065.pdf LA English DT Article DE ;Chesapeke Bay;Sampling efficiencies;Crassostrea virgnica;Oysters AB Sampling efficiency of two oyster fishing gears, patent tongs and an oyster dredge, were compared in reference to diver-harvested quadrats in Chesapeake Bay, which supports important harvests of eastern oyster Crassosrrea virginica. Mean densities of spat (0$35 mm), small oysters (>35 mm to 75 mm), marketable oysters (>75 mm), and all oysters (three size-groups combined) estimated from patent tong samples were not significantly different from those derived from diver-harvested quadrat samples. In contrast, the densities estimated from dredge samples were low, only 2-32% of the diver estimates. Accordingly, patent tongs are recommended as the sampling gear for estimating eastern oyster stock abundance in the Maryland portion of Chesapeake Bay. PY 1992 SO North American Journal of Fisheries Management PU American Fisheries Society VL 12 BP 825 EP 832 ID 3065 ER EF