Table 1.
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Correlation of residuals among the six species investigated (elasmobranchs, hake, red mullet, octopus, squid, and cuttlefish) obtained from fitting an exponential regression to CPUE data with time as an independent variable.

ElasmobranchHakeRed mulletOctopusCuttlefish
Hake0.62***
Red mullet0.17–0.13
Octopus0.61***0.60***0.14
Cuttlefish0.39*–0.020.300.61***
Squid0.50***0.250.150.62***0.57***
ElasmobranchHakeRed mulletOctopusCuttlefish
Hake0.62***
Red mullet0.17–0.13
Octopus0.61***0.60***0.14
Cuttlefish0.39*–0.020.300.61***
Squid0.50***0.250.150.62***0.57***

The residuals obtained in these regressions were then used in the GAM analyses to model CPUEs as a function of the IDEA, NAO and ENSO indices. *p < 0.05; **p < 0.005; p < 0.001.

Table 1.
Open in new tab

Correlation of residuals among the six species investigated (elasmobranchs, hake, red mullet, octopus, squid, and cuttlefish) obtained from fitting an exponential regression to CPUE data with time as an independent variable.

ElasmobranchHakeRed mulletOctopusCuttlefish
Hake0.62***
Red mullet0.17–0.13
Octopus0.61***0.60***0.14
Cuttlefish0.39*–0.020.300.61***
Squid0.50***0.250.150.62***0.57***
ElasmobranchHakeRed mulletOctopusCuttlefish
Hake0.62***
Red mullet0.17–0.13
Octopus0.61***0.60***0.14
Cuttlefish0.39*–0.020.300.61***
Squid0.50***0.250.150.62***0.57***

The residuals obtained in these regressions were then used in the GAM analyses to model CPUEs as a function of the IDEA, NAO and ENSO indices. *p < 0.05; **p < 0.005; p < 0.001.

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