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PONTELLID COPEPOD DISTRIBUTION IN RELATION TO SURFACE WATER TYPES IN THE CENTRAL NORTH PACIFIC 1
Author(s) -
Sherman Kenneth
Publication year - 1963
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1963.8.2.0214
Subject(s) - copepod , salinity , oceanography , plankton , biology , water mass , surface water , temperature salinity diagrams , zooplankton , ecology , crustacean , environmental science , geology , environmental engineering
A study of the distribution of pontellid copepods collected from two central North Pacific water types, the North Pacific Central (NPC) and the North Pacific Equatorial (NPE), and from a zone of intermediate salinity between them, indicated that Labidocera acutifrons, immature Labidocera sp., and Labidocera detruncata were associated with the NPC water type, and may serve as useful indicators of the presence of this water during the summer months in the Hawaiian region. In winter L. acutifrons and L. detruncata were found to be more widely distributed than in summer in both the intermediate‐salinity water and the NPE water type, suggesting a seasonal variation, which was thought to be related to a seasonal shift in water type distribution. Both sampling time and depth were shown to be important considerations in the collection of pontellid copepods. A comparison between plankton collections made at 2100 at the surface and from 0–60 m showed that pontellids were more numerous in the surface waters (0–1 m) than in lower levels at this hour.