Grandcourt: Effect of intensive line fisfiing on biomass of Pnstipomoides ftlamentosus 



311 



year (Mees, 1993) for P. filamentosus in the Seychelles. The 

 proportion (82%) of the initial biomass of P. filamentosus 

 removed is not dissimilar to that estimated by Polovina 

 ( 1986) for P zo/ia^us (68%) in the Mariana Archipelago over 

 the same number of fishing days. 



The results of this study are relevant to fisheries man- 

 agers because they demonstrate that although intensive 

 line fishing operations are efficient at harvesting offshore 

 demersal fisheries resources, they have the potential to 

 heavily overexploit populations in a short time frame. 



Acknowledgments 



I thank Kerlson Gonzales for enduring the difficult living 

 conditions aboard the mothership during the trip to Saya 

 de Malha Bank and for the high quality of data collected, 

 Cecile Botsoie for entering the log book information into 

 the database, Chris Mees for instruction in the use of the 

 programme PBRETON used in the analysis of the daily 

 catch records, and Francis Marsac for providing construc- 

 tive comments and discussion. 



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