Aspects of the reproduction of an invasive crab, Hemigrapsus sanguineus, in northern and southern New England
by Gamelin, Emily F., M.S., UNIVERSITY OF NEW HAMPSHIRE, 2010, 145 pages; 1485427

Abstract:

Populations of the invasive shore crab, Hemigrapsus sanguineus , were studied in northern and southern New England to determine if crabs differ in reproductive behavior or characteristics between these regions. Additionally, effects of temperature on reproductive activity were quantified through laboratory experimentation.

Number of broods per season increased with temperature, but the seasonal total was limited to three broods in laboratory experiments. Broods experienced limited success at the lowest temperature, 10°C. The reproductive season was longer at lower latitudes, and females at this site had smaller average ovigerous size. Patterns of ovigery varied between the regions, suggesting the production of one brood per season in New Hampshire, compared to two to three broods per season in Rhode Island.

Overall, temperature may limit the possibility and degree of reproductive output by females, which may slow the spread or limit establishment of this species in northern latitudes.

 
AdviserLarry G. Harris
SchoolUNIVERSITY OF NEW HAMPSHIRE
SourceMAI/ 48-06, p. , Aug 2010
Source TypeThesis
SubjectsEcology; Fisheries and aquatic sciences
Publication Number1485427
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