Journal
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
Volume 70, Issue 11, Pages 1641-1649Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjfas-2013-0060
Keywords
-
Categories
Funding
- National Science Foundation [OCE-09-61157, OCE-12-33868]
- Hood College Board of Associates McCardell Grant
- Directorate For Geosciences
- Division Of Ocean Sciences [1233868] Funding Source: National Science Foundation
Ask authors/readers for more resources
We examined the potential for bottom temperatures <= 12 degrees C to inhibit successful recruitment of planktonic lobster postlarvae to the benthos. In laboratory trials, postlarvae held at 11 degrees C exhibited higher mortality, slower development, and reduced size increase at molt relative to postlarvae held at 13 C. We sampled at field sites within Machias Bay, Maine (mean bottom temperature 12.39 degrees C, 46.1 degree-days >= 12 degrees C) and at the mouth of the bay (mean bottom temperature 11.57 degrees C, 5.1 degree-days >= 12 degrees C), where temperature was influenced by the cold Eastern Maine Coastal Current (EMCC). We found significantly higher settlement at the warm inshore site but, the abundance of competent planktonic postlarvae was not significantly different between sites, indicating a disconnect between postlarval abundance and settlement. Regional sampling of newly settled lobsters revealed a pattern of higher settlement at inshore sites extending across a broader coastal region impacted by the EMCC. Our results suggest that small differences in water temperature may shape settlement patterns through either behavioral avoidance of colder settlement sites or elevated postsettlement mortality of postlarvae settling at colder sites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available