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Table 7 Correlations between herring catch size and blubber thickness of gray seals. Results with p < 0.10 are included. BP = Baltic proper, GF = the Gulf of Finland, BS = the Bothnian Sea, S = southern regions (BP + AS + GF). Pups: < one year old, sub-adults: 1–3 years old

From: The effect of prey quality and ice conditions on the nutritional status of Baltic gray seals of different age groups

Data set Time period r p Age group of herring
Total data 2003–2015 −0.57 0.043 5–6-year-old herring(S)
Total data 2003–2015 −0.70 0.008 age 6+ herring(S)
Total data 2003–2010 −0.70 0.053 5–6-year-old herring(S)
Total data 2003–2010 −0.86 0.006 age 6+ herring(S)
Total data 2003–2010 −0.77 0.025 age 6+ herring(S+BS)
Pups, total 2003–2015 −0.49 0.092 5–6-year-old herring(S)
Pups, total 2003–2015 −0.56 0.049 age 6+ herring(S)
Pups, BP 2003–2015 −0.51 0.074 5–6-year-old herring(S)
Pups, BP 2003–2015 −0.53 0.064 age 6+ herring(S)
Pups, BP 2003–2010 −0.77 0.026 5–6-year-old herring(S)
Sub-adults, total 2004–2010 −0.72 0.068 5–6-year-old herring(S)
Sub-adults, total 2004–2010 −0.79 0.036 age 6+ herring(S)
Sub-adults, total 2004–2010 −0.88 0.009 age 6+ herring(S+BS)