THE ECOLOGY OF THE CALANOID COPEPOD PSEUDOCALANUS MINUTUS KR@YER IN TESSIARSUK, A COASTAL MEROMICTIC LAKE OF NORTHERN LABRADOR
a deep coastal meromictic lake of northern Labrador, was made in the summer of 1961 and spring of 1962. The lake, containing two basins, is separated from Anaktalik Bay by a shallow threshold and receives periodic volumes of tidal water. Maximum salinity at depth was 21.5%,, while surface salinity w...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.3304 http://www.aslo.org/lo/toc/vol_10/issue_3/0345.pdf |
| Summary: | a deep coastal meromictic lake of northern Labrador, was made in the summer of 1961 and spring of 1962. The lake, containing two basins, is separated from Anaktalik Bay by a shallow threshold and receives periodic volumes of tidal water. Maximum salinity at depth was 21.5%,, while surface salinity was less and increased through the season. Tempera-tures were stable in the monimolimnion but variable in the chcmocline and mixolimnion. Gradual deoxygenation occurred with depth; the profundal waters contained only traces of oxygen. In both lake basins P. minutus produced two gcncrations each year with a possibility that some animals might have been annual. l?cmalcs in the spring spawned two broods in succession. An inverse relationship existed bctwcen water temperature and copepodite length. All stages were concentrated in the upper waters; the copepodites underwent a gradual seasonal descent. The salinity gradient produced a distinct spatial separation of Pseudocalanus from the other autochthonous calanoids, Acartia cln~ssi and Eurytemora himmdoides. |
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