Marine mammals: Historical Exploitation Patterns.
1. Spatial diffusion: same species or new species supplying same demands using
2. More effective and efficient technology permitting continued exploitation of
declining resource stocks.
3. Capture of species previously not available before adoption of new
4. Appropriate to pre-20th century exploitation. Although the model does not
incorporate resource management and conservation regulations which have
influenced post-1920 practices, similar patterns have characterized
modern hunting practices.
Reproduced by permission of C. W. Sanger © 1998. Adapted by Duleepa Wijayawardhana, 1998.