Morphological characteristics of the Greenback Mullet Planiliza subviridis (Valenciennes, 1836) in the estuarine and coastal waters of Can Gio, Ho Chi Minh City
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Abstract
The greenback mullet, Planiliza subviridis (Valenciennes, 1836), is a commercially important species inhabiting the estuarine and coastal areas of the Can Gio district. Morphometric and meristic characteristics of the mullet were examined in 30 preserved individuals (TL 129.87 - 178.04 mm, mean 145.42 mm; BW 19.17 - 56.82 g, mean 30.01 g). A total of 381 specimens (129 males, 245 females, and 7 unsexed) were collected from sampling sites in Can Gio from November 2023 to November 2024 to analyze the lengthweight relationship and the relative condition factor (Kn). Meristic features of P. subviridis were recorded as D1 IV; D2 I,8; A III,9; V I,5; P 14 - 15; C 16; Pect sc 7 - 8; D1 sc 9 - 10; D2 sc 19 - 21; Ll 30 - 33. The length-weight relationships were expressed as W= 0.016 x L2.859 (R2 = 0.949; n = 381) for pooled samples; W= 0.017 x L2.842 (R2 = 0.947; n = 245) for females and W= 0.030 x L2.626 (R2 = 0.899; n = 129) for males. The b value of females was significantly higher than that of males (P < 0.05). The relative condition factor (Kn) averaged 0.988 (0.720 - 1.378) in the dry season and 1.204 (0.737 - 1.254) in the wet season, indicating a highly significant seasonal difference (P < 0.01).
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References
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