Journal of Biology ›› 2023, Vol. 40 ›› Issue (4): 62-.doi: 10.3969/j.issn.2095-1736.2023.04.062

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Morphology and growth characteristics of otoliths of two species of Sciaenidae in the marine ranching area of Haizhou Bay

ZHANG Shuo1,2, ZHANG Xiao1, GAO Shike1, SUN Wen1   

  1. 1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; 2. Key Laboratory of
    Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University,
    Shanghai 201306, China
  • Online:2023-08-18 Published:2023-08-10

Abstract: The morphological parameters, growth characteristics of otoliths of Collichthys lucidus and Larimichthys polyactis and their relationship with fish growth were studied. The left sagittal otolith was selected as the research object, and the growth relation of each parameter of sagittal otolith was fitted by linear, logarithmic, power and exponential functions. The results showed the long and short diameters of the sagittal otoliths of two species increased with the increase of body length and weight, but the ratio of the long diameter to the short diameter was basically stable. There were significant power function correlations not only between the long and short diameters of sagittal otoliths and body length of C. lucidus, but also between the long and short diameters and body weight. There was a significant linear correlation between the long diameter and short diameter of sagittal otolith of small yellow croaker and body length and weight. For the growth characteristics of sagittal otolith, there were obvious differences between the two kinds of fish. The ratio of short diameter to long diameter of sagittal otolith of C. lucidus was stable at 0.75, while that of L. polyactis was 0.6. There was a significant power function correlation between the length and diameter of the sagittal otolith and the otolith weight of C. lucidus, while that of L. polyactis was a linear function correlation. The random forest results showed that the contribution rates of otolith morphological parameters to body length and weight of the two species were different, but the difference was not significant.

Key words: Collichthys lucidus, Larimichthys polyactic, otolith morphology, random forest, Haizhou Bay

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