in the Dutch Waddensee, and the drift of the larvae from the English Channel will
bring them to just outside Texel Gate, the entry to the Waddensee, as they reach the
juvenile life phase. Matching of spawning sites to subsequent larval-drift paths
provides minimal loss of larvae and juveniles to waters unsuitable for survival, and it
also provides for arrival at a suitable juvenile habitat. That is the meaning of
hydrographic containment.
Fig. 17.1 Three examples of spawning migrations to sites providing hydrographic
containment. (a) Spawning site of North Sea plaice. The usual larval drift is toward
the Waddensee juvenile rearing area entered by Texel Gate.
(^) (After Cushing 1995.)
(b) Cod and haddock spawning area on the northeast peak of Georges Bank showing
typical dispersion of stage 2, 3, and 4 larvae during post-spawning drift.
(^) (After GLOBEC NW Atlantic implementation plan.)
(c) Spawning sites and typical larval drift patterns for North Atlantic cod. Drift
generally carries the young back to feeding sites from which adults migrate to
spawning sites.
(^) (After Brander 1997.)