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Conclusiones

By Food and Agriculture Organization of the United Nations

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Book Id: WPLBN0000195973
Format Type: PDF eBook
File Size: 0.2 MB
Reproduction Date: Available via World Wide Web.
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Title: Conclusiones  
Author: Food and Agriculture Organization of the United Nations
Volume:
Language: English
Subject: United Nations., Food and Agriculture Organization of the United Nations. FAO agriculture series, Agriculture
Collections: United Nations Food and Agriculture Organization Collection
Historic
Publication Date:
Publisher: Food and Agriculture Organization of the United Nations; Digitizer: Fao

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Agriculture Organization Of The United Nations, F. A. (n.d.). Conclusiones. Retrieved from http://worldebookfair.com/


Description
Nutrition Reference Publication

Summary
Electronic reproduction.

Excerpt
Excerpt: CONCLUSIONES Se presentan cambios importantes de biomasa y composici›n de especies pelÿgicas en el Pacífico Sureste, asociadas al fen›meno de El Ni?o y a la pesca intensa desde 1972. Estos cambios se refieren a la disminuci›n muy pronunciada de anchoveta Engraulis ringens hasta cerca de 1/10 de su biomasa original y al incremento de la pesca de sardina Sardinops sagax unas 70 veces, jurel Trachurus symmetricus murphyi cerca de 81 veces y caballa Scomber japonicus mÿs de 100 veces. El aumento del nœmero de huevos de sardina en el plancton desde 1972, sustenta el incremento de biomasa y la expansi›n de nuevas y mÿs extensas ÿreas de sardina. Paralelamente el guanay Phalacrocorax bougainvillii predador de la anchoveta ha cedido su preponderancia a otra especie bajando desde 80% al 38% y otro predador, el bonito Sarda sarda chiliensis descendi› sus capturas a niveles muy bajos.

 

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