Evolution of the Food Web in Bandon Bay, the Gulf of Thailand: Ten Years of the Blue Swimming Crab Stocking Program
ผู้เขียน :
Amonsak Sawusdee
เผยแพร่วันที่ :
21 มิ.ย. 2566
ประเภท :
บทความวิจัยที่ตีพิมพ์ในวารสารวิชาการระดับนานาชาติ
วารสารวิชาการ :
เล่มที่ :
34
ฉบับที่ :
2
หน้า :
109-130
ผู้เผยแพร่ :
Penerbit Universiti Sains Malaysia
รายละเอียด :
Abstract. The ecosystem of Bandon Bay, in the Gulf of Thailand (GoT), has been impacted
since 2007 by the continued stocking of larval blue swimming crab Portunus pelagicus, also
called a crab bank. In this study, the food web in the Bay was modeled using Ecopath software
to compare the trophic status, interaction and energy flow among the components in the
system in 2007 and 2016 (i.e., before and 10 years after the crab bank intervention). The
models were based on data collected from trawling. Twenty fish and shellfish components
were used in the 2007 model, while 22 were used in the 2016 model. A significant increase in
biomass was found in blue swimming crab, but biomass declined for other demersal fishes,
cephalopods, and Penaeid shrimps. The production/biomass ratios of most components were
higher in 2016 but the consumption/biomass ratios were relatively unchanged. The ecotrophic
efficiency indicated that shellfishes were more exploited than fishes. Changes in most of the
ecological indices revealed higher maturity and stability after ten years of crab bank operation.
The mixed trophic impact indicated bottom-up regulation, and that the increase of blue
swimming crab negatively impacted only Mantis shrimp. Overall, the results indicate positive
impacts of the crab bank intervention.
ลิงค์ :