Comparative study of otolith and sulcus morphology for stock discrimination of yellow drum along the Chinese coast

Otolith morphology is widely used for fish stock identification. The sulcus, a structure on the medial side of the otolith, is an important feature in morphological analysis. This study was conducted to evaluate the feasibility of using sulcus morphology for stock identification and to compare its p...

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Bibliographic Details
Published in:Journal of Oceanology and Limnology
Main Authors: Song Junjie, Zhao Bo, Liu Jinhu, Cao Liang, Dou Shuozeng
Format: Report
Language:English
Published: SCIENCE PRESS 2019
Subjects:
otolith
sulcus
shape indices
elliptic Fourier analysis
stock discrimination
Nibea albiflora
Marine & Freshwater Biology
Oceanography
Limnology
SAGITTAL OTOLITH
POPULATION-STRUCTURE
SHAPE-ANALYSIS
NORTHEAST ATLANTIC
FOURIER-ANALYSIS
NIBEA-ALBIFLORA
IDENTIFICATION
VARIABILITY
SEA
ACUSTICUS
Northeast Atlantic
Online Access:http://ir.qdio.ac.cn/handle/337002/162144
https://doi.org/10.1007/s00343-019-8056-6
Description
Summary:Otolith morphology is widely used for fish stock identification. The sulcus, a structure on the medial side of the otolith, is an important feature in morphological analysis. This study was conducted to evaluate the feasibility of using sulcus morphology for stock identification and to compare its performance with commonly used otolith morphology analysis. Otoliths were collected and analyzed from three geographical groups (the Huanghe (Yellow) River estuary, HHE; the Jiaozhou Bay, JZB; and the Changjiang (Yangtze) River estuary, CJE) of yellow drum Nibea albiflora. The results show that the analysis of sulcus morphology based on shape indices (SIs), elliptic Fourier coefficients (EFc), and a combination of the two parameters identified stocks at overall classification rates of 51.0%, 72.5%, and 73.2%, respectively. These classification rates are similar to those obtained using otolith morphology analysis (57.0%, 73.8%, and 76.5% by SIs, EFc, and their combination, respectively). The findings suggest that sulcus morphology is comparable to the commonly used otolith morphology for identifying stocks of sciaenids, such as the yellow drum. For both otolith and sulcus morphology, EFc could identify the stocks more efficiently than SIs, while the combination of SIs and EFc was even better.

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