Analysis of Effect of Morphological Traits on Meat Yield of Procambarus clarinii in Poyang Lake Area

doi:10.11924/j.issn.1000-6850.casb2025-0167

Abstract

Abstract:

To clarify the relationship between morphological traits and abdominal meat yield in adult red swamp crayfish (Procambarus clarkii) from Poyang Lake, the abdominal meat yield and nine morphological traits were measured in 310 Procambarus clarkii individuals. The influence of morphological traits on abdominal meat yield was investigated using correlation analysis, path analysis, and stepwise regression analysis. Morphological prediction equations for abdominal meat yield were constructed. The main traits affecting abdominal meat yield in the female and male groups were total length and third abdominal segment length. The main traits affecting abdominal meat yield in the mixed group were total length, first abdominal segment width, and third abdominal segment length. Using the significant traits as independent variables and abdominal meat yield as the dependent variable, multiple regression equations were constructed: female group: y_female=0.614x₁+0.678x₂-0.266x₃-0.014 (R²=0.735), male group: y_male=0.229x₁+0.618x₂-3.301x₃-0.041 (R²=0.689), mixed group: y_mixed=0.718x₁+0.496x₂+0.480x₃-0.086 (R²=0.753). Where x₁=total length/body length, x₂=first abdominal segment width/body length, x₃=third abdominal segment length/body length, and x₄=Fulton’s condition factor (K). The best-fitting curve models for the relationship between condition factor (K) and abdominal meat yield were primarily power functions in the female and mixed groups, and primarily binomial in the male group. For selective breeding of Procambarus clarkii from Poyang Lake based on meat yield rate, when breeding female and male groups separately, it is recommended to primarily use condition factor (K) as the main reference trait, with total length/body length and third abdominal segment length/body length as auxiliary reference traits; for the mixed group, it is recommended to primarily use condition factor (K) as the main reference trait, with total length/body length, first abdominal segment width/body length, and third abdominal segment length/body length as auxiliary reference traits. This study provides a reference basis for the genetic breeding of Procambarus clarkii based on abdominal meat yield.

Key words: Procambarus clarkii, morphological character, path analysis, regression analysis, curve fitting

ZHANG Ying, HUANG Jiangfeng, ZHOU Zhiyong, LI Yanhe, XU Xiandong, WANG Jingyu, ZHONG Keer, ZHANG Haixin, SHAO Huiyu, ZHANG Aifang. Analysis of Effect of Morphological Traits on Meat Yield of Procambarus clarinii in Poyang Lake Area[J]. Chinese Agricultural Science Bulletin, 2025, 41(30): 147-155.

Figures/Tables 13

References 25

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性状	雌性			雄性			混合群体
性状	平均值	标准差	变异系数/%	平均值	标准差	变异系数/%	平均值	标准差	变异系数/%
BW/g	39.68	11.27	28.39	38.66	10.39	26.88	39.12	10.79	27.58
AMW/g	4.36	0.67	15.28	5.42	0.77	14.23	4.95	0.89	17.98
BL/mm	91.82	5.60	6.10	93.25	7.36	7.90	92.61	6.65	7.18
TL/mm	106.23	6.35	5.86	109.28	5.93	5.42	108.23	6.35	5.86
CL/mm	45.22	3.39	7.50	45.61	3.37	7.37	45.22	3.39	7.50
CW/mm	25.13	1.88	7.46	25.63	1.88	7.33	25.41	1.89	7.45
FASL/mm	7.28	0.85	11.67	7.67	0.87	11.30	7.49	0.88	11.73
FASW/mm	20.84	1.60	7.77	21.98	1.57	7.12	21.47	1.68	7.81
TASL/mm	10.29	1.79	11.46	11.13	1.11	9.97	10.75	1.22	11.30
TASW/mm	19.17	1.34	7.00	20.40	1.44	7.04	19.85	1.52	7.67
AMY/%	0.134	0.034	27.61	0.147	0.031	21.10	0.134	0.034	27.60
K	0.051	0.010	19.91	0.046	0.007	14.65	0.048	0.008	18.06
TL/BL	1.165	0.034	2.89	1.182	0.178	3.04	1.174	0.034	2.97
CL/BL	0.487	0.021	4.36	0.493	0.080	4.38	0.490	0.061	4.37
CW/BL	0.274	0.012	4.37	0.277	0.043	3.94	0.276	0.033	4.14
FASL/BL	0.079	0.009	11.33	0.083	0.016	11.26	0.081	0.013	11.40
FASW/BL	0.227	0.013	7.00	0.238	0.035	5.22	0.232	0.028	5.81
TASL/BL	0.112	0.012	11.27	0.120	0.019	9.84	0.117	0.017	10.89
TASW/BL	0.209	0.015	7.29	0.221	0.034	4.88	0.215	0.028	6.37

性状	雌性			雄性			混合群体
性状	平均值	标准差	变异系数/%	平均值	标准差	变异系数/%	平均值	标准差	变异系数/%
BW/g	39.68	11.27	28.39	38.66	10.39	26.88	39.12	10.79	27.58
AMW/g	4.36	0.67	15.28	5.42	0.77	14.23	4.95	0.89	17.98
BL/mm	91.82	5.60	6.10	93.25	7.36	7.90	92.61	6.65	7.18
TL/mm	106.23	6.35	5.86	109.28	5.93	5.42	108.23	6.35	5.86
CL/mm	45.22	3.39	7.50	45.61	3.37	7.37	45.22	3.39	7.50
CW/mm	25.13	1.88	7.46	25.63	1.88	7.33	25.41	1.89	7.45
FASL/mm	7.28	0.85	11.67	7.67	0.87	11.30	7.49	0.88	11.73
FASW/mm	20.84	1.60	7.77	21.98	1.57	7.12	21.47	1.68	7.81
TASL/mm	10.29	1.79	11.46	11.13	1.11	9.97	10.75	1.22	11.30
TASW/mm	19.17	1.34	7.00	20.40	1.44	7.04	19.85	1.52	7.67
AMY/%	0.134	0.034	27.61	0.147	0.031	21.10	0.134	0.034	27.60
K	0.051	0.010	19.91	0.046	0.007	14.65	0.048	0.008	18.06
TL/BL	1.165	0.034	2.89	1.182	0.178	3.04	1.174	0.034	2.97
CL/BL	0.487	0.021	4.36	0.493	0.080	4.38	0.490	0.061	4.37
CW/BL	0.274	0.012	4.37	0.277	0.043	3.94	0.276	0.033	4.14
FASL/BL	0.079	0.009	11.33	0.083	0.016	11.26	0.081	0.013	11.40
FASW/BL	0.227	0.013	7.00	0.238	0.035	5.22	0.232	0.028	5.81
TASL/BL	0.112	0.012	11.27	0.120	0.019	9.84	0.117	0.017	10.89
TASW/BL	0.209	0.015	7.29	0.221	0.034	4.88	0.215	0.028	6.37

性状	AMY	K	TL/BL	CL/BL	CW/BL	FASL/BL	FASW/BL	TASL/BL	TASW/BL
AMY	1	-0.784^**	0.211^*	-0.359^**	-0.461^**	0.261^**	-0.039	0.202^**	-0.150
K		1	0.037	0.499^**	0.744^**	-0.032	0.411^**	0.131	0.302^**
TL/BL			1	0.179^*	0.288^**	0.273^**	0.273^**	0.275^**	0.077
CL/BL				1	0.522^**	-0.029	0.290^**	0.053	0.256^**
CW/BL					1	0.173^*	0.529^**	0.338^**	0.391^**
FASL/BL						1	0.414^**	0.487^**	0.172^*
FASW/BL							1	0.607^**	0.462^**
TASL/BL								1	0.293^**
TASW/BL									1

性状	AMY	K	TL/BL	CL/BL	CW/BL	FASL/BL	FASW/BL	TASL/BL	TASW/BL
AMY	1	-0.784^**	0.211^*	-0.359^**	-0.461^**	0.261^**	-0.039	0.202^**	-0.150
K		1	0.037	0.499^**	0.744^**	-0.032	0.411^**	0.131	0.302^**
TL/BL			1	0.179^*	0.288^**	0.273^**	0.273^**	0.275^**	0.077
CL/BL				1	0.522^**	-0.029	0.290^**	0.053	0.256^**
CW/BL					1	0.173^*	0.529^**	0.338^**	0.391^**
FASL/BL						1	0.414^**	0.487^**	0.172^*
FASW/BL							1	0.607^**	0.462^**
TASL/BL								1	0.293^**
TASW/BL									1

性状	AMY	K	TL/BL	CL/BL	CW/BL	FASL/BL	FASW/BL	TASL/BL	TASW/BL
AMY	1	-0.703^**	0.340^**	-0.392^**	-0.319^**	0.434^**	0.045	0.375^**	-0.168^*
K		1	-0.011	0.583^**	0.630^**	-0.198^*	0.350^**	-0.083	0.487^**
TL/BL			1	0.047	0.223^**	0.274^**	0.259^**	0.313^**	0.199^**
CL/BL				1	0.451^**	-0.127	0.231^**	-0.127	0.387^**
CW/BL					1	0.004	0.349^**	0.126	0.355^**
FASL/BL						1	0.461^**	0.636^**	0.074
FASW/BL							1	0.506^**	0.463^**
TASL/BL								1	0.156^**
TASW/BL									1