大鳍鳠仔、稚鱼异速生长模式研究

doi:10.16378/j.cnki.1003-1111.25056

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Abstract In order to explore the growth characteristics and allometric growth of Hemibagrus macropterus at larval and juvenile stages, the 0—29 days post hatching(dph) larvae and juveniles were reared in a plastic tank of 50 cm×40 cm×60 cm at average water temperature of 27 ℃, the growth process was observed using stereo microscope, and total length (TL) of H. macropterus were measured from hatching to 29 dph. The growth of total length and maxillary whisker length, head length, eye orbital, eye distance, caudal fin length and pelvic fin length were measured, and their regression analysis with the total length was conducted. The results showed that the increase of the total length in line with cubic function was divided into three phases: larva stage from 0 to 10 dph, early juvenile stage from 11 to 21 dph, and late juvenile stage from 22—29 dph. The growth rate showed significant difference at each stage (P<0.05), with the inflection point at 7 dph [TL:(16.387±0.643) mm] for maxillary whisker length, head length and eye distance. The inflection point was found at 10 dph [TL: (17.452±0.586) mm] for caudal fin length, at 11 dph [TL: (17.822±0.387) mm] for eye orbital and ventral fin length. Allometric growth was observed in all organs measured during early development stages, including maxillary whisker length (allometric growth index of 6.148), head length (1.799), eye orbital (2.223), eye distance (3.653), caudal fin length (4.543) and ventral fin length (4.135). The maxillary whisker length was still found to be positive allometric growth after the inflection point, with the significant decrease in allometric growth index (1.363) (P<0.05). The eye orbital and ventral fin length were shown to be isomeric allometric growth after the inflection point, with allometric growth indices of 1.050 and 0.978, respectively. Head length, eye distance and caudal fin length had negative allometric growth after the inflection point, with the allometric growth indices of 0.937, 0.740 and 0.895, respectively. The findings provided theoretical basis and practical guidance for larva and juvenile rearing in H. macropterus

Key words： Hemibagrus macropterus allometric growth larval and juvenile fish growth inflection point early development

Received: 06 March 2025

PACS:

S965.199

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	Articles by authors
	FENG Mengjia
	FENG Shuangyuan
	ZENG Linhui
	LI Sendong
	BAN Wenzhuo
	FENG Ke
	XU Hongyan

Cite this article:

FENG Mengjia,FENG Shuangyuan,ZENG Linhui, et al. Allometric Growth Pattern in Larval and Juvenile Hemibagrus macropterus[J]. Fisheries Science, 2026, 45(1): 141-147.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.25056 OR https://www.shchkx.com/EN/Y2026/V45/I1/141

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