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Abstract— <p>Age-at-length structure for the southern thorny sculpin <i>Icelus cataphractus</i> from the Sea of Japan and the northern thorny sculpin <i>I. spiniger</i> from the Sea of Okhotsk has been examined from the bottom trawling surveys data. No significant differences in the shape and structure of otoliths of the studied species have been found. The age of sexual maturity (4–5 years) and the calculated lifespan (13–14 years) of both species are similar. The highest growth rate is characteristic of females of the southern thorny sculpin and this parameter is significantly higher in females of this species. No sexual dimorphism in growth rate has been detected in the northern thorny sculpin. The male growth rates for both species are similar.</p>

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Comparative Analysis of Age, Growth, and Morphology of Otoliths of Northern Thorny Sculpin Icelus spiniger and Southern Thorny Sculpin I. cataphractus (Cottidae)

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • V. A. Shelekhov,
  • V. V. Panchenko,
  • P. A. Saveliev

摘要

Abstract—

Age-at-length structure for the southern thorny sculpin Icelus cataphractus from the Sea of Japan and the northern thorny sculpin I. spiniger from the Sea of Okhotsk has been examined from the bottom trawling surveys data. No significant differences in the shape and structure of otoliths of the studied species have been found. The age of sexual maturity (4–5 years) and the calculated lifespan (13–14 years) of both species are similar. The highest growth rate is characteristic of females of the southern thorny sculpin and this parameter is significantly higher in females of this species. No sexual dimorphism in growth rate has been detected in the northern thorny sculpin. The male growth rates for both species are similar.