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J.R. Moring

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In situ surveys using scuba are important tools in the management of smallmouth bass (Micropterus dolomieu) in boreal, clear lakes of North America. Population estimates that are derived from such surveys may be erroneous if the size composition of the fish observed by divers differs from that of the entire population. Forty-four adult smallmouth bass of three size classes were radio-tagged and tracked during the summer of 1993 (mid June to early September) in Green Lake, Maine, USA, to investigate possible size-related error from observations by divers being towed along the lake shore. Our results indicate that scuba divers may fail to count a significant portion of large smallmouth bass during late summer (mid...
Categories: Publication; Types: Citation; Tags: Fisheries Research
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The reintroduction of anadromous alewives, Alosa pseudoharengus, to their historic habitats in the inland waters of the United States and Canada, has prompted concerns about possible interactions with a popular sport fish, white perch, Morone americana. Both species are now widely distributed in northeastern North America. Diets of white perch in Lake George, Maine, U.S.A., where alewives were absent, were monitored and compared with those of white perch populations that were sympatric with anadromous alewives in two coastal Maine lakes, Biscay Pond and North Pond. In the presence of introduced alewives, the diet of adult white perch became almost exclusively juvenile alewives by late summer in ponds where both...
Categories: Publication; Types: Citation; Tags: Hydrobiologia
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Larval and juvenile lumpfish, Cyclopterus lumpus L., were collected and measured over a 20-year period, 1979-1999, from tidepools along the coast of Maine. Using this extensive data base reduces the effects of annual variations in hatching times, early growth patterns, and locale for analyzing monthly size using length measurements. This can provide an effective field measurement of intertidal growth. Most fish were encountered during the months of July and August, and even when adjusted for number of sampling trips, 78% of the juveniles were encountered in tidepools during these months. Based on average lengths, size increased by 23% between June and July, 43% between July and August, and 34% between August and...
Categories: Publication; Types: Citation; Tags: Northeastern Naturalist
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Forty-four smallmouth bass Micropterus dolomieu of three size-classes were radiotracked in Green Lake, Maine, during summer 1993 (10 June-1 September) to determine whether adult size influenced distribution and movement. Large smallmouth bass (>406 mm) used deep water (>8 m) more often than did small (248-279 mm) or medium-sized (305-356 mm) smallmouth bass during the late summer (15 July-1 September). Large smallmouth bass also were found at middepths (4-8 m) significantly more often than were small individuals during late summer. Small fish used cover more frequently than large ones during early summer (10 June-13 July). Both small and medium-sized individuals were associated with cover more frequently than large...
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