Geology topics

M.B. Cole

Publications and source records attributed to M.B. Cole.

2 recordsLinked to original sources

USGS1997

Potential error with in situ surveys of smallmouth bass, Micropterus dolomieu Lacepede, as determined by radio-telemetry

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 July to early September), compared to small- or medium-sized fish. The results suggest that scuba surveys should be conducted during early summer (mid June to mid July) to derive more accurate population estimates.

Fisheries Research↗

USGS1997

Relation of adult size to movements and distribution of smallmouth bass in a central Maine Lake

Forty‐four smallmouth bass Micropterus dolomieu of three size‐classes were radio‐tracked 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 smallmouth bass were during the late summer. Small smallmouth bass exhibited significantly smaller summer total ranges than did large individuals, and mean active displacement differed among all three size‐classes.

Maine↗