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Based upon the hypothesis of Meyer (1968) that periods of low stability of the water column in autumn should parallel good cod year-classes in the following year, this paper analyses available time series of cod recruitment, subsurface oceanographic stability data and wind stress data off West Green...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.7765 http://archive.nafo.int/open/studies/s24/stein2.pdf |
| Summary: | Based upon the hypothesis of Meyer (1968) that periods of low stability of the water column in autumn should parallel good cod year-classes in the following year, this paper analyses available time series of cod recruitment, subsurface oceanographic stability data and wind stress data off West Greenland. Correlation analysis yielded no significant results between stability, wind stress and recruitment when considering the entire length of avail-able time series. Instead, splitting of the autumn based oceanographic data set into a pre-1970s part (when warm climatic conditions and high recruitment prevailed), and a recent part (for the past twenty years of cooling climate) yielded significant coherence of recruit-ment and environmental conditions of the cold climate period. For the warm climate period only occasional consistency was seen. The possible influence of the Great Salinity Anomaly on recruitment of cod is discussed. It is suggested that during the past twenty years a new correlation mechanism, an advective coupling instead of a low stability coupling, explains |
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