Fig 1.
(A) Location of the north-central SCS (indicated by the black box). (B) Sampling stations and CPUE of S. oualaniensis (indicated by the size of the circle).
Table 1.
Number of voyage and net of large-scale light falling-net.
Fig 2.
(A) Distribution of CPUE frequencies. (B) Distribution of logarithmically t transformed CPUE frequencies. (C) SCPUE. (D) Number of S. oualaniensis survey data points.
Fig 3.
Effects of spatiotemporal and environmental factors on S. oualaniensis CPUE based on GAMs.
(A) Year, (B) month, (C) latitude, (D) longitude, (E) SST, and (F) Chl-a. Shaded regions indicate the 95% confidence intervals. Rug plots on the x-axis indicate the relative density of data points.
Table 2.
Analysis of deviance for generalized additive model (GAM) fitted to the CPUE.
Table 3.
The contribution of selected environmental variables in the GAM.
Fig 4.
Interaction effects of S. oualaniensis CPUE, SST and Chl-a based on GAMs.
Fig 5.
Relationship among SST, Chl-a and SCPUE.
Boxes A and B indicate the phenomena of “low SST, high Chl-a and low SCPUE” in March and “high SST, low Chl-a and high SCPUE” in May, respectively.
Fig 6.
Time series analysis of SSW (A), SST (B), Chl-a (C), and SCPUE (D). The dashed box shows the influence of climate anomalies on S. oualaniensis SCPUE in 2008.
Fig 7.
Climatological average of SSW (A, m/s), SST (B, °C), Chl-a (C, mg/m3), and SCPUE (D) from March to May during the anomalous (2007–2010, red dotted line) and normal (2006–2007 and 2009–2010, blue dotted line) periods.