중서부태평양 가다랑어(Katsuwonus pelamis)의 연령과 성장
Age and Growth of the Skipjack Tuna Katsuwonus pelamis in the Western and Central Pacific Ocean
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The age and growth of the skipjack tuna Katsuwonus pelamis were determined using otoliths sampled from a Korean tuna purse seine fishery in the Western and Central Pacific Ocean from January 2005 to September 2006. A total of 312 otoliths were used to estimate the ages of skipjack tuna, which ranged from 1 to 7 years. The relationships between otolith ring radius (R) and fork length (FL) for female, male, and sex combined were FL = 19.74R + 1.50 (r2 = 0.54), FL = 17.66R + 6.35 (r2 = 0.47), and FL = 18.83R + 3.36 (r2 = 0.53), respectively. The back-calculated fork lengths of each age (FLyear) were FL1 = 36.2 cm, FL2 = 43.3 cm, FL3 = 48.3 cm, FL4 = 52.6 cm, FL5 = 56.5 cm, FL6 = 60.8 cm, and FL7 = 63.2 cm. The relationships between fork length (FL) and total weight (TW) for female, male, and sex combined were TW = 0.00001FL3.19 (r2 = 0.95), TW = 0.00001FL3.17 (r2 = 0.95), and TW = 0.000009FL3.23 (r2 = 0.95), respectively. The von Bertalanffy growth parameters of skipjack tuna estimated in this study were L∞ = 77.4 cm, K = 0.176/year, and t0 = –2.569 years.
Abstract
The age and growth of the skipjack tuna Katsuwonus pelamis were determined using otoliths sampled from a Korean tuna purse seine fishery in the Western and Central Pacific Ocean from January 2005 to September 2006. A total of 312 otoliths were used to estimate the ages of skipjack tuna, which ranged from 1 to 7 years. The relationships between otolith ring radius (R) and fork length (FL) for female, male, and sex combined were FL = 19.74R + 1.50 (r2 = 0.54), FL = 17.66R + 6.35 (r2 = 0.47), and FL = 18.83R + 3.36 (r2 = 0.53), respectively. The back-calculated fork lengths of each age (FLyear) were FL1 = 36.2 cm, FL2 = 43.3 cm, FL3 = 48.3 cm, FL4 = 52.6 cm, FL5 = 56.5 cm, FL6 = 60.8 cm, and FL7 = 63.2 cm. The relationships between fork length (FL) and total weight (TW) for female, male, and sex combined were TW = 0.00001FL3.19 (r2 = 0.95), TW = 0.00001FL3.17 (r2 = 0.95), and TW = 0.000009FL3.23 (r2 = 0.95), respectively. The von Bertalanffy growth parameters of skipjack tuna estimated in this study were L∞ = 77.4 cm, K = 0.176/year, and t0 = –2.569 years.
참고문헌 (35)
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