Ohman, M.D. (1987). Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus. Limnology and Oceanography 32(6):1317-1330.

105800

Ohman, M.D.

1987

32(6):1317-1330.

Publication

Available in Wilson Copepod Library (non-digital)

Available for editors  

Neocalanus 1317 Portobello Marine Laboratory, P.O. Box 8, Portobcllo, New Zealand, and New Zealand Oceanographic Institute, Division of Marine and Freshwater Science, D.S.I.R., Private Bag, Kilbirnie, Wellington tonsus Brady was collected in subantarctic waters off southeastern New Zealand to test experimentally the importance of storage lipids and particulate matter as energy sources for recruitment. Reproductive copepods occur in mesopelagic depths (1,OOO-500m) in austral winter and in epipelagic depths (150-O m) in spring. Winter copepods released up to 19 eggs female-’ d-l in filtered seawater; spring copepods required a particulate food source to release eggs. Winter females ingcstcd diatoms at half the rate of spring females. Winter CVs did not ingest diatoms, in contrast to spring and summer CVs. Winter females had 24 times the wax ester content, half the phospholipid, and half the nitrogen content of spring females. In contrast, the two groups did not differ in dry mass or carbon content. Application of a proposed method for estimating reproductive potential, combined with experimental results, suggeststhat stored lipids are the energy source for recruitment of mesopelagic winter animals but not epipelagic spring animals. Subantarctic N. tonsus is distinguished from subarctic Pacific Neocalanus plumchrus and NeoCalanus cristatus by residence of adult females in surface waters, active suspension feeding, and the dcpcndence of egg production on particulate food in spring. Divergent life history traits may be observed for copepod species occupying parallel subpolar habitats in the southern and northern hemispheres.

RIS (EndNote, Reference Manager, ProCite, RefWorks)
BibTex (BibDesk, LaTeX)

[Back to search]