Correlation between grouped 1SW return rates and zooplankton energy ZEFF in migration corridor sections (during-migration and annually) and ecosystem integration regions.
| . | Correlation of ZEFF with normalized merged 1SW return rates (2 s.f.) . | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Channel returns . | West returns . | East returns . | ||||||||||||
| Along corridor: during | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | |||
| Southwest shelf crossing | −0.19 | .30 | |||||||||||||
| ASR France–Ireland | −0.16 | .38 | 0.25 | .12 | 0.35 | .027* | |||||||||
| ASR Ireland–Scotland | 0.28 | .25 | 0.35 | .095· | 0.39 | .10· | |||||||||
| ASR Faroe–Shetland Channel | −0.044 | .81 | 0.030 | .86 | −0.14 | .42 | |||||||||
| North Sea | 0.33 | .12 | 0.34 | .16 | |||||||||||
| Norwegian Coastal Current | 0.16 | .48 | −0.070 | .81 | |||||||||||
| Along corridor: annual | |||||||||||||||
| Southwest shelf crossing | −0.029 | .87 | −0.083 | .61 | 0.012 | .94 | |||||||||
| ASR France–Ireland | −0.23 | .20 | 0.14 | .39 | 0.06 | .72 | |||||||||
| ASR Ireland–Scotland | 0.13 | .51 | 0.41 | .017* | 0.25 | .14 | |||||||||
| ASR Faroe–Shetland Channel | −0.074 | .69 | 0.16 | .32 | 0.016 | .92 | |||||||||
| North Sea | .49 | .018* | 0.33 | .17 | |||||||||||
| Norwegian Coastal Current | .40 | .054· | 0.36 | .12 | |||||||||||
| Ecosystem integration | lag | lag | lag | ||||||||||||
| Blue whiting spawning grounds | 0.11 | .57 | 0.45 | .0051** | 0.24 | .15 | 0–1 (0) | .51 | .013* | 0.36 | .13 | 0 | |||
| SPG-influenced region | −0.082 | .66 | 0.47 | .0086** | 0.0010 | 1.00 | 0–4 (1) | .49 | .023* | 0.41 | .085· | 0 | |||
| Sandeel spawning grounds | 0.35 | .052· | 0 | 0.58 | .0017** | 0.046 | .78 | 0–4 (1) | .55 | .0095** | 0.42 | .077· | 0–2 (1) | ||
| . | Correlation of ZEFF with normalized merged 1SW return rates (2 s.f.) . | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Channel returns . | West returns . | East returns . | ||||||||||||
| Along corridor: during | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | |||
| Southwest shelf crossing | −0.19 | .30 | |||||||||||||
| ASR France–Ireland | −0.16 | .38 | 0.25 | .12 | 0.35 | .027* | |||||||||
| ASR Ireland–Scotland | 0.28 | .25 | 0.35 | .095· | 0.39 | .10· | |||||||||
| ASR Faroe–Shetland Channel | −0.044 | .81 | 0.030 | .86 | −0.14 | .42 | |||||||||
| North Sea | 0.33 | .12 | 0.34 | .16 | |||||||||||
| Norwegian Coastal Current | 0.16 | .48 | −0.070 | .81 | |||||||||||
| Along corridor: annual | |||||||||||||||
| Southwest shelf crossing | −0.029 | .87 | −0.083 | .61 | 0.012 | .94 | |||||||||
| ASR France–Ireland | −0.23 | .20 | 0.14 | .39 | 0.06 | .72 | |||||||||
| ASR Ireland–Scotland | 0.13 | .51 | 0.41 | .017* | 0.25 | .14 | |||||||||
| ASR Faroe–Shetland Channel | −0.074 | .69 | 0.16 | .32 | 0.016 | .92 | |||||||||
| North Sea | .49 | .018* | 0.33 | .17 | |||||||||||
| Norwegian Coastal Current | .40 | .054· | 0.36 | .12 | |||||||||||
| Ecosystem integration | lag | lag | lag | ||||||||||||
| Blue whiting spawning grounds | 0.11 | .57 | 0.45 | .0051** | 0.24 | .15 | 0–1 (0) | .51 | .013* | 0.36 | .13 | 0 | |||
| SPG-influenced region | −0.082 | .66 | 0.47 | .0086** | 0.0010 | 1.00 | 0–4 (1) | .49 | .023* | 0.41 | .085· | 0 | |||
| Sandeel spawning grounds | 0.35 | .052· | 0 | 0.58 | .0017** | 0.046 | .78 | 0–4 (1) | .55 | .0095** | 0.42 | .077· | 0–2 (1) | ||
Along-corridor statistics shown only for regions utilized by post-smolts from each population grouping. Detrended (diff) correlations calculated only where trends are present in the time series. Lag indicates years of lag giving significant correlation; peak of cross-correlation given in brackets. Symbols indicate P-values, as previously defined.
Correlation between grouped 1SW return rates and zooplankton energy ZEFF in migration corridor sections (during-migration and annually) and ecosystem integration regions.
| . | Correlation of ZEFF with normalized merged 1SW return rates (2 s.f.) . | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Channel returns . | West returns . | East returns . | ||||||||||||
| Along corridor: during | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | |||
| Southwest shelf crossing | −0.19 | .30 | |||||||||||||
| ASR France–Ireland | −0.16 | .38 | 0.25 | .12 | 0.35 | .027* | |||||||||
| ASR Ireland–Scotland | 0.28 | .25 | 0.35 | .095· | 0.39 | .10· | |||||||||
| ASR Faroe–Shetland Channel | −0.044 | .81 | 0.030 | .86 | −0.14 | .42 | |||||||||
| North Sea | 0.33 | .12 | 0.34 | .16 | |||||||||||
| Norwegian Coastal Current | 0.16 | .48 | −0.070 | .81 | |||||||||||
| Along corridor: annual | |||||||||||||||
| Southwest shelf crossing | −0.029 | .87 | −0.083 | .61 | 0.012 | .94 | |||||||||
| ASR France–Ireland | −0.23 | .20 | 0.14 | .39 | 0.06 | .72 | |||||||||
| ASR Ireland–Scotland | 0.13 | .51 | 0.41 | .017* | 0.25 | .14 | |||||||||
| ASR Faroe–Shetland Channel | −0.074 | .69 | 0.16 | .32 | 0.016 | .92 | |||||||||
| North Sea | .49 | .018* | 0.33 | .17 | |||||||||||
| Norwegian Coastal Current | .40 | .054· | 0.36 | .12 | |||||||||||
| Ecosystem integration | lag | lag | lag | ||||||||||||
| Blue whiting spawning grounds | 0.11 | .57 | 0.45 | .0051** | 0.24 | .15 | 0–1 (0) | .51 | .013* | 0.36 | .13 | 0 | |||
| SPG-influenced region | −0.082 | .66 | 0.47 | .0086** | 0.0010 | 1.00 | 0–4 (1) | .49 | .023* | 0.41 | .085· | 0 | |||
| Sandeel spawning grounds | 0.35 | .052· | 0 | 0.58 | .0017** | 0.046 | .78 | 0–4 (1) | .55 | .0095** | 0.42 | .077· | 0–2 (1) | ||
| . | Correlation of ZEFF with normalized merged 1SW return rates (2 s.f.) . | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Channel returns . | West returns . | East returns . | ||||||||||||
| Along corridor: during | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | r | PMC | rdiff | Pdiff | |||
| Southwest shelf crossing | −0.19 | .30 | |||||||||||||
| ASR France–Ireland | −0.16 | .38 | 0.25 | .12 | 0.35 | .027* | |||||||||
| ASR Ireland–Scotland | 0.28 | .25 | 0.35 | .095· | 0.39 | .10· | |||||||||
| ASR Faroe–Shetland Channel | −0.044 | .81 | 0.030 | .86 | −0.14 | .42 | |||||||||
| North Sea | 0.33 | .12 | 0.34 | .16 | |||||||||||
| Norwegian Coastal Current | 0.16 | .48 | −0.070 | .81 | |||||||||||
| Along corridor: annual | |||||||||||||||
| Southwest shelf crossing | −0.029 | .87 | −0.083 | .61 | 0.012 | .94 | |||||||||
| ASR France–Ireland | −0.23 | .20 | 0.14 | .39 | 0.06 | .72 | |||||||||
| ASR Ireland–Scotland | 0.13 | .51 | 0.41 | .017* | 0.25 | .14 | |||||||||
| ASR Faroe–Shetland Channel | −0.074 | .69 | 0.16 | .32 | 0.016 | .92 | |||||||||
| North Sea | .49 | .018* | 0.33 | .17 | |||||||||||
| Norwegian Coastal Current | .40 | .054· | 0.36 | .12 | |||||||||||
| Ecosystem integration | lag | lag | lag | ||||||||||||
| Blue whiting spawning grounds | 0.11 | .57 | 0.45 | .0051** | 0.24 | .15 | 0–1 (0) | .51 | .013* | 0.36 | .13 | 0 | |||
| SPG-influenced region | −0.082 | .66 | 0.47 | .0086** | 0.0010 | 1.00 | 0–4 (1) | .49 | .023* | 0.41 | .085· | 0 | |||
| Sandeel spawning grounds | 0.35 | .052· | 0 | 0.58 | .0017** | 0.046 | .78 | 0–4 (1) | .55 | .0095** | 0.42 | .077· | 0–2 (1) | ||
Along-corridor statistics shown only for regions utilized by post-smolts from each population grouping. Detrended (diff) correlations calculated only where trends are present in the time series. Lag indicates years of lag giving significant correlation; peak of cross-correlation given in brackets. Symbols indicate P-values, as previously defined.
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