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Homing and site fidelity in the greasy grouper Epinephelus tauvina (Serranidae) within a marine protected area in coastal Kenya
Homing ability and site-fidelity in the greasy grouper Epinephelus tauvina (Serranidae)
were studied at Malindi Marine Park (6.3 km2), coastal Kenya, from January to April 2002 using
acoustic telemetry. Displacement experiments involving 12 groupers (mean size 57.9 cm) from
multiple capture sites resulted in a 67% homing success. Upon release at displacement sites (0.5 to
2.6 km from the point of capture), most initial movements were small-scale and non-directional. Neither
the tidal range nor time of day influenced the magnitude of these daily movements. Returns to
the capture sites were sudden, occurring predominantly (88%) on spring tide dates. Fish displaced at
the spring tide returned to capture sites faster (8.6 d) than those displaced at the neap tide (14.3 d).
Time taken to return to capture sites ranged from 4 to 19 d (mean 9.6 d) and was not correlated with
distance of displacement. However, time taken for the fish to home was negatively correlated with
tidal range at displacement. Home ranges established after homing (0.07 to 0.73 km2) were stable and
negatively correlated with fish size, suggesting an ontogenetic shift in home range development
A study of policies governing the employment of part-time professional nurses in hospitals
Thesis (M.S.)--Boston Universit
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