The relationship between body condition index and ecological factors in two Phrynocephalus species in the piedmont desert of Altai Mountains

doi:10.17520/biods.2019090

Abstract

Abstract:

We investigated the age-related and sexual characteristics in Phrynocephalus helioscopus and P. grumgrzimailoi using the body condition index and its relationship to annual mean temperature, annual precipitation, altitude, and mean diurnal range. We collected body measurement data for 176 individuals of P. helioscopus and 84 individuals of P. grumgrzimailoi. The body condition index is comprised of the ratio of log body mass to log snout-vent length. There were significant differences of the body condition index between P. helioscopus and P. grumgrzimailoi. In P. grumgrzimailoi, body condition indices between the sexes were significantly different but were not in P. helioscopus. Differences between sub-adults and adults were significant in both species. Body condition index of P. grumgrzimailoi differed significantly through time but remained unchanged in P. helioscopus. Annual mean temperature is a significant predictor for body condition index of P. grumgrzimailoi and interacts with annual precipitation in our models. Meanwhile, altitude had significant effects on body condition index in P. helioscopus. These results suggest that these two species respond differently to various environmental factors, and their adaptability to different environmental conditions are not the same.

Key words: Altai Mountains, Phrynocephalus, body condition index, ecological factors

Xiaqiu Tao,Zhigang Jiang,Shengnan Ji,Hongjun Chu,Na Li,Daode Yang,Chunwang Li. The relationship between body condition index and ecological factors in two Phrynocephalus species in the piedmont desert of Altai Mountains[J]. Biodiv Sci, 2020, 28(4): 412-421.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2019090

https://www.biodiversity-science.net/EN/Y2020/V28/I4/412

Figures/Tables 4

References 74

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采集时间 Collecting month	采集地点 Area	年龄 Age	性别 Sex	样本量 Sample size	头体长 Snout-vent length (cm) (Mean ± SE)	体重 Body mass (g) (Mean ± SE)	体况指数 Body condition index (Mean ± SE)
奇台沙蜥 Phrynocephalus grumgrzimailoi
2014.7	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	51	4.89 ± 0.46	4.47 ± 1.29	0.9131 ± 0.1339
2014.7		成体 Adult	♂	15	5.20 ± 0.48	5.90 ± 1.51	1.0556 ± 0.1120
2015.8	塔克什肯镇	成体 Adult	♀	3	4.25 ± 0.19	3.20 ± 0.63	0.7949 ± 0.1037
	Takeshiken Town	成体 Adult	♂	5	4.22 ± 0.22	3.21 ± 0.38	0.8042 ± 0.0602
		亚成体 Sub-adult		10	2.67 ± 0.14	0.74 ± 0.11	-0.3205 ± 0.1598
旱地沙蜥 Phrynocephalus helioscopus
2014.6	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	9	4.27 ± 0.45	3.42 ± 0.85	0.8264 ± 0.1196
2014.6		成体 Adult	♂	6	4.12 ± 0.29	3.33 ± 0.77	0.8317 ± 0.1217
2014.7	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	19	4.24 ± 0.50	3.25 ± 1.16	0.7784 ± 0.1431
2014.7		成体 Adult	♂	13	4.26 ± 0.33	3.59 ± 0.79	0.8655 ± 0.1166
2015.8	塔克什肯镇 Takeshiken Town	成体 Adult	♀	42	4.43 ± 0.46	4.18 ± 1.01	0.9187 ± 0.2224
	塔克什肯镇 Takeshiken Town	成体 Adult	♂	28	4.48 ± 0.20	4.30 ± 0.48	0.9685 ± 0.0637
		亚成体 Sub-adult		52	2.96 ± 0.21	1.21 ± 0.24	0.1462 ± 0.1902
2015.9	塔克什肯镇 Takeshiken Town	成体 Adult	♀	1	4.32	4.25	0.9895
	塔克什肯镇 Takeshiken Town	成体 Adult	♂	2	4.57 ± 0.57	4.67 ± 0.37	1.0131 ± 0.0600
		亚成体 Sub-adult		4	3.24 ± 0.32	1.58 ± 0.42	0.3479 ± 0.2535

采集时间 Collecting month	采集地点 Area	年龄 Age	性别 Sex	样本量 Sample size	头体长 Snout-vent length (cm) (Mean ± SE)	体重 Body mass (g) (Mean ± SE)	体况指数 Body condition index (Mean ± SE)
奇台沙蜥 Phrynocephalus grumgrzimailoi
2014.7	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	51	4.89 ± 0.46	4.47 ± 1.29	0.9131 ± 0.1339
2014.7		成体 Adult	♂	15	5.20 ± 0.48	5.90 ± 1.51	1.0556 ± 0.1120
2015.8	塔克什肯镇	成体 Adult	♀	3	4.25 ± 0.19	3.20 ± 0.63	0.7949 ± 0.1037
	Takeshiken Town	成体 Adult	♂	5	4.22 ± 0.22	3.21 ± 0.38	0.8042 ± 0.0602
		亚成体 Sub-adult		10	2.67 ± 0.14	0.74 ± 0.11	-0.3205 ± 0.1598
旱地沙蜥 Phrynocephalus helioscopus
2014.6	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	9	4.27 ± 0.45	3.42 ± 0.85	0.8264 ± 0.1196
2014.6		成体 Adult	♂	6	4.12 ± 0.29	3.33 ± 0.77	0.8317 ± 0.1217
2014.7	卡拉麦里山有蹄类自然保护区 Mt. Kalamaili Ungulate Nature Reserve	成体 Adult	♀	19	4.24 ± 0.50	3.25 ± 1.16	0.7784 ± 0.1431
2014.7		成体 Adult	♂	13	4.26 ± 0.33	3.59 ± 0.79	0.8655 ± 0.1166
2015.8	塔克什肯镇 Takeshiken Town	成体 Adult	♀	42	4.43 ± 0.46	4.18 ± 1.01	0.9187 ± 0.2224
	塔克什肯镇 Takeshiken Town	成体 Adult	♂	28	4.48 ± 0.20	4.30 ± 0.48	0.9685 ± 0.0637
		亚成体 Sub-adult		52	2.96 ± 0.21	1.21 ± 0.24	0.1462 ± 0.1902
2015.9	塔克什肯镇 Takeshiken Town	成体 Adult	♀	1	4.32	4.25	0.9895
	塔克什肯镇 Takeshiken Town	成体 Adult	♂	2	4.57 ± 0.57	4.67 ± 0.37	1.0131 ± 0.0600
		亚成体 Sub-adult		4	3.24 ± 0.32	1.58 ± 0.42	0.3479 ± 0.2535

	相关系数 Correlation coefficient (r)	P
奇台沙蜥 Phrynocephalus grumgrzimailoi
海拔 Altitude	-0.352	0.001^**
年均温 Annual mean temperature (AMT)	0.442	<0.001^**
年降水量 Annual precipitation (AP)	0.368	0.001^**
平均日较差 Mean diurnal range (MDR)	0.433	<0.001^**
旱地沙蜥 Phrynocephalus helioscopus
海拔 Altitude	-0.032	0.672
年均温 Annual mean temperature (AMT)	0.009	0.908
年降水量 Annual precipitation (AP)	0.021	0.778
平均日较差 Mean diurnal range (MDR)	-0.005	0.942

	相关系数 Correlation coefficient (r)	P
奇台沙蜥 Phrynocephalus grumgrzimailoi
海拔 Altitude	-0.352	0.001^**
年均温 Annual mean temperature (AMT)	0.442	<0.001^**
年降水量 Annual precipitation (AP)	0.368	0.001^**
平均日较差 Mean diurnal range (MDR)	0.433	<0.001^**
旱地沙蜥 Phrynocephalus helioscopus
海拔 Altitude	-0.032	0.672
年均温 Annual mean temperature (AMT)	0.009	0.908
年降水量 Annual precipitation (AP)	0.021	0.778
平均日较差 Mean diurnal range (MDR)	-0.005	0.942

	相关系数 Correlation coefficient (r)	P
成体旱地沙蜥 Adult Phrynocephalus helioscopus
海拔 Altitude	0.065	0.478
年均温 Annual mean temperature (AMT)	-0.508	<0.001^**
年降水量 Annual precipitation (AP)	-1.3	0.158
平均日较差 Mean diurnal range (MDR)	0.264	0.004^**
亚成体旱地沙蜥 Sub-adult Phrynocephalus helioscopus
海拔 Altitude	-0.053	0.701
年均温 Annual mean temperature (AMT)	0.307	0.021^*
年降水量 Annual precipitation (AP)	-0.155	0.255
平均日较差 Mean diurnal range (MDR)	-0.85	0.533