Record Details
Distribution of anchoveta (Engraulis ringens Jenyns) in northern Chile in relation to selected oceanographic conditions
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Distribution of anchoveta (Engraulis ringens Jenyns) in northern Chile in relation to selected oceanographic conditions |
| Names |
Canon, Jose Raul
(creator) McCauley, James E. (advisor) |
| Date Issued | 1972-12-06 (iso8601) |
| Note | Graduation date: 1973 |
| Abstract | The present work is an attempt to correlate information collected in the northern part of Chile with the anchoveta distribution and its fluctuation. This information was collected over a three year period (November 1967 to November 1970) by the Instituto de Fomento Pesquero, Chile (IFOP). The first and second part represent an exhaustive review of the biology of the species and the principal oceanographic features of its habitat. It is based upon several years of research conducted by the Instituto de Fomento Pesquero in Chile, the Instituto del Mar del Peru in Peru, and other institutions. Results of these studies are reported through 1972, providing the necessary background for the discussion presented in later chapters. In part three the information collected during the three year period by IFOP is presented. Seasonal average maps of temperature, salinity, transparency, fish distribution, volume of zooplankton, eggs and larvae of anchoveta are presented and discussed. Oxygen and temperature sections are also presented in relation to school distribution, The final part is entirely devoted to a discussion of outstanding features of the interrelationship of the anchoveta to the environment that is found in the region. The effect of temperature appears to be important in the fish distribution and may be responsible for the major concentrations during summer months that result in higher catches by the fishing fleet. Oxygen appears to be of primary importance in the seasonal fluctuations. When upwelling takes place, especially during winter, water with a low oxygen content from the Peru-Chile Undercurrent is brought to the surface forcing the anchoveta to migrate to the west away from the coastal areas. The effect of a highly saline and warm oceanic front may also affect fish distribution. The effect of all these could also affect eggs and larval survival, but the relationships are not clear. The bibliography at the end of the work is a complete bibliographical review on the subject and will be used for further studies in anchoveta off Peru and Chile. |
| Genre | Thesis/Dissertation |
| Topic | Anchovies |
| Identifier | http://hdl.handle.net/1957/28269 |
