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Individual variability in Diel Vertical migration of a marine copepod : why some individuals remain at depth when others migrate

Hays, G.C., Kennedy, H. and Frost, B.W. 2001, Individual variability in Diel Vertical migration of a marine copepod : why some individuals remain at depth when others migrate, Limnology and oceanography, vol. 46, no. 8, pp. 2050-2054.

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Title Individual variability in Diel Vertical migration of a marine copepod : why some individuals remain at depth when others migrate
Author(s) Hays, G.C.ORCID iD for Hays, G.C. orcid.org/0000-0002-3314-8189
Kennedy, H.
Frost, B.W.
Journal name Limnology and oceanography
Volume number 46
Issue number 8
Start page 2050
End page 2054
Total pages 5
Publisher American Society of Limnology and Oceanography
Place of publication Grafton, Wis.
Publication date 2001-12
ISSN 0024-3590
1541-5856
Summary The diel vertical migration (DVM) of the copepod Metridia pacifica was examined in Dabob Bay (47°45.05′N, 122°49.71′W), a fjord in Washington state. Although the population showed deep daytime residence (75-175 m), a proportion of the population was found in the surface waters at night. For individuals that migrated to the surface, the mean size of the oil sac was much smaller than those that remained at depth (mean lengths of oil sac 0.25 mm for individuals collected between 0 and 25 m at night, compared with 0.43 mm for individuals from between 125 and 175 m). Similarly, the C : N ratio was lower for animals collected from near the surface, indicative of their lower lipid reserves. These results suggest that individual variability in DVM was influenced by body condition, with those animals with larger lipid stores not needing to risk coming to the surface to feed at night.
Language eng
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C4.1 Letter or note
Copyright notice ©2001, American Society of Limnology and Oceanography
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058248

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.