南海珊瑚礁海域黑缘尾九棘鲈生物学特征初步研究

doi:10.11978/2020069

Abstract

Abstract:

Based on the coral reef fishes of Cephalopholis spiloparaea (Serranidae: Cephalopholis), which were collected from the coral reef waters of the Nansha Islands and Xisha Islands in the South China Sea in September 2018 and May-June 2019, we studied the biological characteristics of C. spiloparaea, including population structure, gonad maturity composition, feeding intensity, fatness index, age, and growth. We compared the geographic variation of the biological characteristics between the two coral reef waters in the South China Sea. The results are as follows. 1) The ranges of the dominant body length were 96~125 mm and 96~115 mm, respectively, in the Nansha reef waters and Xisha reef waters. The distributions of body length and body weight both had significant differences between the two waters (P<0.01). 2) The allometric growth factors (b values) of the body length and body weight relationship from the Nansha reef waters and Xisha reef waters were 2.881 and 2.797, respectively. 3) The result of analysis of otolith samples (May-June 2019) suggests that the age range is 0.58~1.44 a. There were no significant differences in the distribution of age between the two reef waters (P>0.05). 4) The C. spiloparaea in the Nansha reef waters was relatively smaller in size and grew faster than that in the Xisha reef waters. 5) In addition, the gonadal maturation ratio of the Xisha reef waters was higher than that of the Nansha reef waters. 6) The feeding stages of C. spiloparaea from the two reef waters were dominated in Stage 1. Compared with the population of C. spiloparaea in the Xisha reef waters, these results demonstrate that the population in the Nansha reef waters had the characteristics of miniaturization, faster growth rate, and lower hepatopancreas index.

Key words: Cephalopholis spiloparaea, coral reef fish, biology, South China Sea

CLC Number:

P735.13

HONG Xiaofan, CHEN Zuozhi, JIANG Yane, ZHANG Jun, WANG Huanhuan, LI Yuanjie, LI Gang. Biological characteristics of Cephalopholis spiloparaea of reef waters in the South China Sea[J].Journal of Tropical Oceanography, 2021, 40(4): 50-62.

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年份	地区	岛礁	样本数目	采样方法
2018	南沙群岛	美济礁、永暑礁、渚碧礁	47	手钓
2018	西沙群岛	琛航岛	110	手钓
2019	南沙群岛	永暑礁、渚碧礁	61	手钓、地笼网
2019	西沙群岛	琛航岛、七连屿	144	手钓、地笼网

海域	群体	体长范围/mm	平均体长/mm	优势体长组/mm	体质量范围/g	平均体质量/g	优势体质量范围/g
南沙	总体	70~134	105.5±10.5	96~125	9.30~58.89	32.03±10.49	20.01~50.00
	雌性	84~134	104.7±10.9	96~115	16.84~58.89	32.10±10.88	20.01~35.00
	雄性	83~128	108.9±10.3	96~125	15.21~54.32	35.22±9.28	20.01~50.00
西沙	总体	68~162	110.4±13.1	96~115	8.46~138.36	36.11±14.67	20.01~50.00
	雌性	80~152	109.3±12.7	96~115	13.08~101.87	34.35±13.62	20.01~50.00
	雄性	78~162	113.1±13.4	106~125	12.6~138.36	38.98±16.74	20.01~50.00

群体	南沙海域			西沙海域			总体
群体	a(×10^-5)	b	R²	a(×10^-5)	b	R²	a(×10^-5)	b	R²
雌性	5.436	2.851	0.9068	5.625	2.829	0.8892	6.892	2.789	0.8872
雄性	6.677	2.801	0.8732	9.031	2.735	0.882	8.673	2.744	0.8818
总群体	4.566	2.881	0.9108	6.685	2.797	0.8945	6.277	2.811	0.9009

拟合参数	L_∞/mm	t₀/a	k/a^-1	RSS	R²
南沙海域	185.24	-0.33	0.69	1128	0.68
西沙海域	195.44	-0.91	0.42	769	0.73
总体	174.78	-0.56	0.64	2074	0.69

Biological characteristics of Cephalopholis spiloparaea of reef waters in the South China Sea

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