On the Length-Weight Relationship of the File-fish, Navodon modestus

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  • ウマヅラハギNavodon modestusの体長－体重関係について
  • ウマズラハギ Navodon modestus ノ タイチョウ タイジュウ カ

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Abstract

The present paper aims at clarifying the length-weight relationship of file-fish, Navodon modestus GÜNTER. The samples are of immature and adult fishes collected from the catches of a small set net and a gill net, from October in 1964 to May in 1965 in the Seto Inland Sea. The adult fishes consist of the spawning cluster sampled in May and the non-spawning one sampled in the months from October to January. The samples was divided into six groups: immature male fishes, female ones, males of spawning cluster, females of spawning cluster, males of non-spawning cluster and female of non-spawning cluster. The length-weight relationship of each group was expressed by the Allometric method. The results of statistical analysis of Allometry formula W=αLβ, or w=k +βl by ITO10) were applied to the length-weight relationship in each group of the file-fish. A test of significance of "slope and positional differences" of length-weight lines was used for comparison of two groups. As results, the following equations expressed by the Allometric method were obtained for each group: Immature file-fish; w = 2.196×10-6 L 3.4649 Male of adult sampled in the spawning season; W = 5.024×10-5 L2.8519 Female of adult sampled in the spawning season; W = 1.517×10-5 L3.1242 Male of adult sampled in the season except the spawning season; W = 1.703×10-4 L2.6168 Female of adult sampled in the season except the spawning season; W = 5.005×10-5 L2.8632

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