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Title: Chronicle of marine fisheries in the Gulf of Thailand: variations, trends and patterns
Authors: Koolkalya, Sontaya
Sawusdee, Amonsak
Jutagate, Tuantong
Keywords: Fish landings;Long-term variation;Short-term variations;Rank correlation;Self organizing maps
Issue Date: Sep-2015
Publisher: NISCAIR-CSIR, India
Abstract: A comprehensive picture of marine fisheries in the Gulf of Thailand (GoT), within Thailand’s boundary, has been described by using fish landing data for 26 years, between 1984 and 2009. Thirty-five (35) species/groups of fish landings were used in analysis. Rastrelliger brachysoma showed the lowest long-term variation (CV) in fish landings at 15.53% and the highest CV was observed in Lates calcarifer at 146.16%. The relationship between CV and fish landings showed a negative trend with a high correlation (r = 0.62) and was associated with species life-history strategies. For short-term variations, the means of the relative variation (28%) were higher than the absolute variation (25%), indicating a higher uncertainty when catches are low. Three trends in fish landings were analyzed by Spearman’s rank correlation. Seven (7) and 3 species/groups trended to decrease and increase, respectively, over the studied period. Meanwhile, 15 species/groups showed a trend of inversion, i.e. increased then decreased. The self-organizing map was used to cluster patterns of fish landings, which indicated temporal trends of chronological order, i.e. 1985-1990, 1992-1998, 1999-2007 and 2008-2009.
Page(s): 1302-1309
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.44(09) [September 2015]

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