Abstract
The effects of various potential cues on the survival and time to metamorphosis of larvae of the sand crab Emerita talpoida (Say) were examined. Zoeal duration, which ranged from 25 to 43 d, was not correlated with subsequent megalopal survival but had a weak, negative correlation with the duration of the megalopal stage. Neither food, sand nor water from containers with adults directly affected megalopal survival or duration. In a second experiment, the presence of sand both increased the probability of survival and shortened the duration of late zoeal stages. This is the first experimental evidence for delayed zoeal metamorphosis in a decapod. Settlement of E. talpoida appears to occur primarily during the zoeal phase, not at the megalopal stage.
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Communicated by M. G. Hadfield, Honolulu
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Harvey, A.W. Larval settlement and metamorphosis in the sand crab Emerita talpoida (Crustacea: Decapoda: Anomura). Marine Biology 117, 575–581 (1993). https://doi.org/10.1007/BF00349768
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DOI: https://doi.org/10.1007/BF00349768