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Table 2 Correlation coefficients between catch and length of Pacific bluefin tuna, Thunnus orientalis, with environmental factors off the Jeju Island during 2004–2013

From: The relationship between fishing characteristics of Pacific bluefin tuna (Thunnus orientalis) and ocean conditions around Jeju Island

Environmental factors

Monthly mean catch

Monthly mean length

PDOI

0.856**

–

AOI

0.312

–

Seawater temperature at 0 m

− 0.359

− 0.408

Seawater temperature at 50 m

− 0.755**

− 0.592**

Salinity at 0 m

0.048

0.194

Salinity at 50 m

0.409

0.443

Dissolved oxygen at 0 m

0.570

0.314

Dissolved oxygen at 50 m

0.500

0.325

  1. The numbers used for the climate indices (i.e., PDOI and AOI) and the seawater properties (temperature, salinity, and dissolved oxygen) were 12 (monthly) and 6 (bi-monthly), respectively
  2. **Indicates the significant level of 0.01
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Fisheries and Aquatic Sciences

ISSN: 2234-1757

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