Morphological character and karyotype of Acrossocheilus kreyenbergii

doi:10.3969/j.issn.1004-1524.20240668

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (10): 2042-2048.DOI: 10.3969/j.issn.1004-1524.20240668

• Animal Science • Previous Articles Next Articles

Morphological character and karyotype of Acrossocheilus kreyenbergii

JIAN Jieliang¹(), GU Huaxin², GU Zhurong², WANG Baolian², FAN Fenglin², WU Xuguo³, XU Xiaojun¹^,^*()

1. Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2. Breeding Industry Development Center of Jiangshan City, Jiangshan 324100, Zhejiang, China
3. Jiangshan Xikeng Family Farm, Jiangshan 324107, Zhejiang, China

Received:2024-07-23 Online:2025-10-25 Published:2025-11-13

Abstract

Abstract:

In order to enrich the karyotype information of Acrossocheilus, morphological and karyotypic analyses of Acrossocheilus kreyenbergii were performed on wild individuals collected from Zhoucun River, Jiangshan City, Zhejiang Province of China. The morphological results showed that the body length is 2.73-4.66 times and 3.20-5.23 times as long as the body depth and head length, respectively. The head length is 1.50-3.47 times and 3.72-5.96 times as long as the snout length and the eye diameter, respectively. The number of gill rakers is 8-14. The main distinguishing features of A. kreyenbergii are as the following: the lower lip is separated by two lateral lobes, the posterior labial sulci interval is narrow, less than 1/3 of the mouth width. A. kreyenbergii has a diploid chromosome number of 50 and the karyotype formula is 2n=50=14m+8sm+8st+20t. The number of chromosome arms is 72. There are no heteromorphic sex chromosomes.

Key words: Acrossocheilus kreyenbergii, morphological character, chromosome karyotype

CLC Number:

S917

JIAN Jieliang, GU Huaxin, GU Zhurong, WANG Baolian, FAN Fenglin, WU Xuguo, XU Xiaojun. Morphological character and karyotype of Acrossocheilus kreyenbergii[J]. Acta Agriculturae Zhejiangensis, 2025, 37(10): 2042-2048.

Figures/Tables 7

References 35

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指标 Index	数值范围 Numerical range	平均值±标准差 Mean±SD	文献[2]中的数值范围 Numerical range in Reference[2]
体长/体高Ratio of body length to body depth	2.73~4.66	3.78±0.31	3.42~3.72
体长/头长Ratio of body length to head length	3.20~5.23	4.08±0.33	4.11~4.39
体长/尾柄长Ratio of body length to caudal peduncle length	3.83~7.22	5.66±0.74	5.25~6.15
体长/尾柄高Ratio of body length to caudal peduncle depth	7.88~11.19	9.86±0.60	8.07~9.60
头长/吻长Ratio of head length to snout length	1.50~3.47	2.48±0.32	2.54~3.42
头长/眼径Ratio of head length to eye diameter	3.72~5.96	4.86±0.56	4.00~4.66
头长/尾柄长Ratio of head length to caudal peduncle length	0.94~1.99	1.39±0.21	1.22~1.41
头长/尾柄高Ratio of head length to caudal peduncle depth	1.78~2.97	2.43±0.23	1.96~2.27
体高/尾柄高Ratio of body depth to caudal peduncle depth	2.09~3.23	2.63±0.21	2.30~2.80
尾柄长/尾柄高Ratio of caudal peduncle length to caudal peduncle depth	1.35~2.56	1.78±0.28	1.53~1.80
头长/眼间距Ratio of head length to interorbital width	1.73~3.51	2.40±0.36	2.55~2.92

指标 Index	数值范围 Numerical range	平均值±标准差 Mean±SD	文献[2]中的数值范围 Numerical range in Reference[2]
体长/体高Ratio of body length to body depth	2.73~4.66	3.78±0.31	3.42~3.72
体长/头长Ratio of body length to head length	3.20~5.23	4.08±0.33	4.11~4.39
体长/尾柄长Ratio of body length to caudal peduncle length	3.83~7.22	5.66±0.74	5.25~6.15
体长/尾柄高Ratio of body length to caudal peduncle depth	7.88~11.19	9.86±0.60	8.07~9.60
头长/吻长Ratio of head length to snout length	1.50~3.47	2.48±0.32	2.54~3.42
头长/眼径Ratio of head length to eye diameter	3.72~5.96	4.86±0.56	4.00~4.66
头长/尾柄长Ratio of head length to caudal peduncle length	0.94~1.99	1.39±0.21	1.22~1.41
头长/尾柄高Ratio of head length to caudal peduncle depth	1.78~2.97	2.43±0.23	1.96~2.27
体高/尾柄高Ratio of body depth to caudal peduncle depth	2.09~3.23	2.63±0.21	2.30~2.80
尾柄长/尾柄高Ratio of caudal peduncle length to caudal peduncle depth	1.35~2.56	1.78±0.28	1.53~1.80
头长/眼间距Ratio of head length to interorbital width	1.73~3.51	2.40±0.36	2.55~2.92

指标 Index	数值 Value	文献[2]中的数值 Numerical value in Reference[2]
背鳍条数Number of dorsal-fin rays	8(3)	8(3)
胸鳍条数Number of pectoral-fin rays	16(1)	14~16(1)
腹鳍条数Number of pelvic-fin rays	9(1)	8(1)
臀鳍条数Number of anal-fin rays	5(3)	5(3)
侧线鳞数Number of lateral-line scales	40~41	39~41
侧线上鳞数Number of scales above lateral-line	5~6	5~6
侧线下鳞数Number of scales below lateral-line	4~5	4~5
外鳃耙数Number of gill rakers	8~14	15~16

指标 Index	数值 Value	文献[2]中的数值 Numerical value in Reference[2]
背鳍条数Number of dorsal-fin rays	8(3)	8(3)
胸鳍条数Number of pectoral-fin rays	16(1)	14~16(1)
腹鳍条数Number of pelvic-fin rays	9(1)	8(1)
臀鳍条数Number of anal-fin rays	5(3)	5(3)
侧线鳞数Number of lateral-line scales	40~41	39~41
侧线上鳞数Number of scales above lateral-line	5~6	5~6
侧线下鳞数Number of scales below lateral-line	4~5	4~5
外鳃耙数Number of gill rakers	8~14	15~16

染色体序号 Chromosome No.	相对长度 Relative length/%	臂比 Arm ratio	类型 Type
1	2.138	1.179	m
2	2.535	1.244	m
3	1.879	1.185	m
4	2.111	1.354	m
5	2.319	1.457	m
6	2.592	1.295	m
7	2.055	1.655	m
8	2.732	1.818	sm
9	1.658	2.815	sm
10	2.296	2.380	sm
11	2.440	1.747	sm
12	1.892	3.353	st
13	1.605	3.174	st
14	2.238	4.821	st
15	3.670	3.912	st
16	1.903	∞	t
17	1.451	∞	t
18	1.700	∞	t
19	1.479	∞	t
20	1.754	∞	t
21	1.427	∞	t
22	1.703	∞	t
23	1.452	∞	t
24	1.185	∞	t
25	1.357	∞	t

Morphological character and karyotype of Acrossocheilus kreyenbergii

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种名 Species	2n	核型公式 Karyotype formula	染色体臂数 Number of chromosome arms	取样地 Sampling location	文献 Reference
光唇鱼A. fasciatus	50	14m+16sm+6st+14t	80	浙江Zhejiang	[24]
侧条光唇鱼A. parallens	50	14m+16sm+8st+12t	80	广东Guangdong	[26]
吉首光唇鱼A. jishouensis	50	14m+16sm+12st+8t	80	湖南Hunan	[27]
虹彩光唇鱼A. iridescens	50	14m+16sm+10st+10t	80	贵州Guizhou	[28]
北江光唇鱼A. beijiangensis	50	14m+16sm+14st+6t	80	广东Guangdong	[29]
云南光唇鱼A. yunnanensis	50	10m+18sm+12st+10t	78	四川Sichuan	[30]
半刺光唇鱼A. hemispinus	50	10m+16sm+8st+16t	76	广西Guangxi	[30]
薄颌光唇鱼A. kreyenbergii	50	14m+8sm+8st+20t	72	浙江Zhejiang	本文Present study

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染色体数目 Number of chromosomes	分裂相数目 Number of metaphase	分裂相所占比例 Percentage of metaphase/%
≤46	6	6
47	5	5
48	4	4
49	4	4
50	79	79
≥51	2	2

染色体数目 Number of chromosomes	分裂相数目 Number of metaphase	分裂相所占比例 Percentage of metaphase/%
≤46	6	6
47	5	5
48	4	4
49	4	4
50	79	79
≥51	2	2