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Journals / Turkish Journal of Zoology / 2013 / Cilt: 37 - Sayı: 1

Age and growth of swordfish (Xiphias gladius L.) in the Aegean Sea

Okan AKYOL
Tevfik CEYHAN
Pages
59–64
Publication Date
2013-01-01
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results show that there was overfishing of swordfish in the Aegean Sea.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Age and growth of swordfish, Xiphias gladius, were determined from 205 specimens (total n = 1408), collected from onboard a swordfish fishery fleet and from a wholesale fish market between June 2008 and July 2011.
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Key Findings & Data:The length and weight distribution of all fish samples ranged from 51 to 242 cm and from 0.85 to 171.0 kg, respectively.
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Conclusion & Impact:The results show that there was overfishing of swordfish in the Aegean Sea.
🔬Design:Research Article
📍Scope:2008 · 205 specimens
⚙️Variables:Key words: Swordfish · Xiphias gladius · age

Abstract

Age and growth of swordfish, Xiphias gladius, were determined from 205 specimens (total n = 1408), collected from onboard a swordfish fishery fleet and from a wholesale fish market between June 2008 and July 2011. The length and weight distribution of all fish samples ranged from 51 to 242 cm and from 0.85 to 171.0 kg, respectively. The 70-80 cm lower jaw fork length range of swordfish had the highest ratio (approximately 57%). The length-weight relationship showed a positive allometric growth (b = 3.32; r2 = 0.969). Age groups of swordfish in the Aegean Sea ranged between 0 and 4 years. Von Bertalanffy growth parameters were calculated as L\infinity = 283.6 ± 56.6 cm, K = 0.15 ± 0.05 year-1, and t0 = -2.09 ± 0.20 year-1, and the index of phi-prime was f' = 9.4. The results show that there was overfishing of swordfish in the Aegean Sea.

Özet

Age and growth of swordfish, Xiphias gladius, were determined from 205 specimens (total n = 1408), collected from onboard a swordfish fishery fleet and from a wholesale fish market between June 2008 and July 2011. The length and weight distribution of all fish samples ranged from 51 to 242 cm and from 0.85 to 171.0 kg, respectively. The 70-80 cm lower jaw fork length range of swordfish had the highest ratio (approximately 57%). The length-weight relationship showed a positive allometric growth (b = 3.32; r2 = 0.969). Age groups of swordfish in the Aegean Sea ranged between 0 and 4 years. Von Bertalanffy growth parameters were calculated as L\infinity = 283.6 ± 56.6 cm, K = 0.15 ± 0.05 year-1, and t0 = -2.09 ± 0.20 year-1, and the index of phi-prime was f' = 9.4. The results show that there was overfishing of swordfish in the Aegean Sea.

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Cite This Article

AKYOL, O., CEYHAN, T. (2013). Age and growth of swordfish (Xiphias gladius L.) in the Aegean Sea. Turkish Journal of Zoology, Cilt: 37 - Sayı: 1, 59–64. https://ajindex.com/articles/177152

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