Karen J. Murchie

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Current understanding of the stress response in fishes has largely come from studies of freshwater-adapted salmonids, with proportionately few comparative studies having examined marine fishes. The current study sought to quantify the magnitude of physiological disturbances, recovery dynamics, and post-exercise behaviour in bonefish (Albula vulpes; a(More)
Fisheries exploitation and habitat alteration are threatening lemon shark (Negaprion bevirostris) populations because they use nearshore regions as nursery sites. As such, there is a need for information on the spatial ecology of juvenile lemon sharks to identify critical habitats that require protection, as well as to understand their basic ecology. The(More)
Sport fishing for sharks, including fishing with the intent to release, is becoming more prevalent within the recreational angling community. Common targets of recreational anglers are juvenile lemon sharks (Negaprion brevirostris) that frequent shallow tropical nearshore habitats. In this study, we captured 32 juvenile lemon sharks (530-875 mm total(More)
Knowledge of the swimming energetics and thermal ecology of sub-tropical and tropical coastal species is extremely limited, yet this information is critical for understanding animal–environment relationships in the face of climate change. Using the ecologically and economically important sportfish, bonefish (Albula vulpes), we determined the critical(More)
The acute action of insulin on neurogenic flare was investigated using iontophoresis. Twenty-five patients with insulin-dependent diabetes mellitus (IDDM) and 25 age- and gender-matched controls were studied. Axon reflex vasodilatation was evoked by transdermal iontophoresis of acetylcholine (ACh) before and after skin treatment by the iontophoresis of(More)
Development on Grand Bahama in the Bahamian Archipelago during the 1950’s to 1970’s resulted in substantial changes to the island’s geography. Hawksbill Creek, which potentially served as a natural migration route for fish from the north side to the south side of the island, was severed and replaced by a man-made canal called the Grand Lucayan Waterway(More)
To identify the timing and location of spawning activity for boneWsh (Albula spp.) in the Bahamian archipelago , we used an acoustic telemetry array spanning 44 km 2 of shallow tidal creeks, Xats, and adjacent deeper coastal waters near Cape Eleuthera. In two successive years, we surgically implanted transmitters in male and female boneWsh (n = 60) and(More)
Thermal biology of bonefish (Albula vulpes) in Bahamian coastal waters and tidal creeks: An integrated laboratory and field study a b s t r a c t Little is known about the thermal tolerances of fish that occupy tropical intertidal habitats or how their distribution, physiological condition, and survival are influenced by water temperature. We used a(More)
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