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en Road proximity affects reproductive investment in lizards: a two-years translocation experiment.
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| 57 | "2020 IENE International Conference. Abstract book. Vol. 5.1.1", | 57 | "2020 IENE International Conference. Abstract book. Vol. 5.1.1", | ||
| 58 | "Num. 4", | 58 | "Num. 4", | ||
| 59 | "pag. 119" | 59 | "pag. 119" | ||
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| 76 | "miteco_geo_level": "1", | 76 | "miteco_geo_level": "1", | ||
| 77 | "modified": "2026-06-23", | 77 | "modified": "2026-06-23", | ||
| 78 | "name": "124e1af6-c33f-5e16-a39e-0a63304e0a7f", | 78 | "name": "124e1af6-c33f-5e16-a39e-0a63304e0a7f", | ||
| 79 | "notes": "Worldwide roads are in continuous expansion, with an | 79 | "notes": "Worldwide roads are in continuous expansion, with an | ||
| 80 | expected increase of >60% by 2050. This may increase selection | 80 | expected increase of >60% by 2050. This may increase selection | ||
| 81 | pressures on wildlife, urging applied ecologist to investigate the | 81 | pressures on wildlife, urging applied ecologist to investigate the | ||
| 82 | adaptive potential of populations to forecast long-term effects. Most | 82 | adaptive potential of populations to forecast long-term effects. Most | ||
| 83 | of the works to date have been individual-focused, obviating the | 83 | of the works to date have been individual-focused, obviating the | ||
| 84 | potential evolutionary impact of these infrastructures on populations | 84 | potential evolutionary impact of these infrastructures on populations | ||
| 85 | of small vertebrates with low migration capability (e.g., lizards). | 85 | of small vertebrates with low migration capability (e.g., lizards). | ||
| 86 | Pressure associated to road proximity can be indirectly derived from | 86 | Pressure associated to road proximity can be indirectly derived from | ||
| 87 | habitat transformation and degradation. We hypothesize that we can | 87 | habitat transformation and degradation. We hypothesize that we can | ||
| 88 | demonstrate the selective effects of a road by comparing lizard | 88 | demonstrate the selective effects of a road by comparing lizard | ||
| 89 | phenotypes between subpopulations differing in proximity to the linear | 89 | phenotypes between subpopulations differing in proximity to the linear | ||
| 90 | infrastructure. Thus, to investigate selective effects as a function | 90 | infrastructure. Thus, to investigate selective effects as a function | ||
| 91 | of road proximity, we selected two150 meter-wide sampling bands of | 91 | of road proximity, we selected two150 meter-wide sampling bands of | ||
| 92 | terrain that were one close to a road and the other one 500 m away | 92 | terrain that were one close to a road and the other one 500 m away | ||
| 93 | from it. We studied differences in vegetation cover, prey | 93 | from it. We studied differences in vegetation cover, prey | ||
| 94 | availability, abundances of aerial predators and lizards, female | 94 | availability, abundances of aerial predators and lizards, female | ||
| 95 | phenology, and hatching date as indicators of habitat quality, | 95 | phenology, and hatching date as indicators of habitat quality, | ||
| 96 | associated to the presence of the road, and as possible drivers of | 96 | associated to the presence of the road, and as possible drivers of | ||
| 97 | subsequent differences in the lizard traits between subpopulations. | 97 | subsequent differences in the lizard traits between subpopulations. | ||
| 98 | Mean values of head and body size, body condition, ecto- and | 98 | Mean values of head and body size, body condition, ecto- and | ||
| 99 | endoparasite loads, tail state, and male nuptial coloration (all | 99 | endoparasite loads, tail state, and male nuptial coloration (all | ||
| 100 | traits associated to individual quality) were compared as base-line | 100 | traits associated to individual quality) were compared as base-line | ||
| 101 | indicators of disruptive selection. Near-males had an earlier | 101 | indicators of disruptive selection. Near-males had an earlier | ||
| 102 | investment of nuptial coloration in life, but coloration was of poor | 102 | investment of nuptial coloration in life, but coloration was of poor | ||
| 103 | quality as compared to far-males. Hatching date was earlier in the far | 103 | quality as compared to far-males. Hatching date was earlier in the far | ||
| 104 | subpopulation, and juveniles were bigger prior to hibernation there. | 104 | subpopulation, and juveniles were bigger prior to hibernation there. | ||
| 105 | In addition, during two years, we carried out a two-step | 105 | In addition, during two years, we carried out a two-step | ||
| 106 | capture-recapture translocation experiment. In the spring of the first | 106 | capture-recapture translocation experiment. In the spring of the first | ||
| 107 | year, we individually marked 120 males, 60 per sampling band, and | 107 | year, we individually marked 120 males, 60 per sampling band, and | ||
| 108 | translocated 30 of them from close to the road to far from the road, | 108 | translocated 30 of them from close to the road to far from the road, | ||
| 109 | and vice-versa. The remaining 60 males formed two control groups, | 109 | and vice-versa. The remaining 60 males formed two control groups, | ||
| 110 | close and far from the road, respectively. A balanced subsample of 25% | 110 | close and far from the road, respectively. A balanced subsample of 25% | ||
| 111 | of the males was recaptured ~30 days, in average, after the first | 111 | of the males was recaptured ~30 days, in average, after the first | ||
| 112 | capture. Intergroup differences in individual change of body | 112 | capture. Intergroup differences in individual change of body | ||
| 113 | condition, parasite load, and sexual coloration were calculated and | 113 | condition, parasite load, and sexual coloration were calculated and | ||
| 114 | used to quantify the response of the lizards to the road proximity. We | 114 | used to quantify the response of the lizards to the road proximity. We | ||
| 115 | found an effect of the treatment on the lizards: translocated lizards | 115 | found an effect of the treatment on the lizards: translocated lizards | ||
| 116 | lost weight. However, control individuals far from the road | 116 | lost weight. However, control individuals far from the road | ||
| 117 | significantly increased their body condition compared to the rest of | 117 | significantly increased their body condition compared to the rest of | ||
| 118 | experimental groups. Interestingly, these same lizards reduced their | 118 | experimental groups. Interestingly, these same lizards reduced their | ||
| 119 | endoparasite load, suggesting a selective impact of the road because | 119 | endoparasite load, suggesting a selective impact of the road because | ||
| 120 | no differences were initially detected in parasite load or body | 120 | no differences were initially detected in parasite load or body | ||
| 121 | condition between subpopulations. This was confirmed during the spring | 121 | condition between subpopulations. This was confirmed during the spring | ||
| 122 | of the second year when 30% of the lizards, marked the previous year, | 122 | of the second year when 30% of the lizards, marked the previous year, | ||
| 123 | were recaptured near the road. The variation observed in the traits | 123 | were recaptured near the road. The variation observed in the traits | ||
| 124 | measured confirmed that far-males had higher individual quality. All | 124 | measured confirmed that far-males had higher individual quality. All | ||
| 125 | this together supports the idea that the road exerts a selective | 125 | this together supports the idea that the road exerts a selective | ||
| 126 | effect, producing disruptive selection on the lizards\u2019 phenotype | 126 | effect, producing disruptive selection on the lizards\u2019 phenotype | ||
| 127 | and, therefore, may have an evolutionary impact on this population.", | 127 | and, therefore, may have an evolutionary impact on this population.", | ||
| 128 | "notes_translated": { | 128 | "notes_translated": { | ||
| 129 | "en": "Worldwide roads are in continuous expansion, with an | 129 | "en": "Worldwide roads are in continuous expansion, with an | ||
| 130 | expected increase of >60% by 2050. This may increase selection | 130 | expected increase of >60% by 2050. This may increase selection | ||
| 131 | pressures on wildlife, urging applied ecologist to investigate the | 131 | pressures on wildlife, urging applied ecologist to investigate the | ||
| 132 | adaptive potential of populations to forecast long-term effects. Most | 132 | adaptive potential of populations to forecast long-term effects. Most | ||
| 133 | of the works to date have been individual-focused, obviating the | 133 | of the works to date have been individual-focused, obviating the | ||
| 134 | potential evolutionary impact of these infrastructures on populations | 134 | potential evolutionary impact of these infrastructures on populations | ||
| 135 | of small vertebrates with low migration capability (e.g., lizards). | 135 | of small vertebrates with low migration capability (e.g., lizards). | ||
| 136 | Pressure associated to road proximity can be indirectly derived from | 136 | Pressure associated to road proximity can be indirectly derived from | ||
| 137 | habitat transformation and degradation. We hypothesize that we can | 137 | habitat transformation and degradation. We hypothesize that we can | ||
| 138 | demonstrate the selective effects of a road by comparing lizard | 138 | demonstrate the selective effects of a road by comparing lizard | ||
| 139 | phenotypes between subpopulations differing in proximity to the linear | 139 | phenotypes between subpopulations differing in proximity to the linear | ||
| 140 | infrastructure. Thus, to investigate selective effects as a function | 140 | infrastructure. Thus, to investigate selective effects as a function | ||
| 141 | of road proximity, we selected two150 meter-wide sampling bands of | 141 | of road proximity, we selected two150 meter-wide sampling bands of | ||
| 142 | terrain that were one close to a road and the other one 500 m away | 142 | terrain that were one close to a road and the other one 500 m away | ||
| 143 | from it. We studied differences in vegetation cover, prey | 143 | from it. We studied differences in vegetation cover, prey | ||
| 144 | availability, abundances of aerial predators and lizards, female | 144 | availability, abundances of aerial predators and lizards, female | ||
| 145 | phenology, and hatching date as indicators of habitat quality, | 145 | phenology, and hatching date as indicators of habitat quality, | ||
| 146 | associated to the presence of the road, and as possible drivers of | 146 | associated to the presence of the road, and as possible drivers of | ||
| 147 | subsequent differences in the lizard traits between subpopulations. | 147 | subsequent differences in the lizard traits between subpopulations. | ||
| 148 | Mean values of head and body size, body condition, ecto- and | 148 | Mean values of head and body size, body condition, ecto- and | ||
| 149 | endoparasite loads, tail state, and male nuptial coloration (all | 149 | endoparasite loads, tail state, and male nuptial coloration (all | ||
| 150 | traits associated to individual quality) were compared as base-line | 150 | traits associated to individual quality) were compared as base-line | ||
| 151 | indicators of disruptive selection. Near-males had an earlier | 151 | indicators of disruptive selection. Near-males had an earlier | ||
| 152 | investment of nuptial coloration in life, but coloration was of poor | 152 | investment of nuptial coloration in life, but coloration was of poor | ||
| 153 | quality as compared to far-males. Hatching date was earlier in the far | 153 | quality as compared to far-males. Hatching date was earlier in the far | ||
| 154 | subpopulation, and juveniles were bigger prior to hibernation there. | 154 | subpopulation, and juveniles were bigger prior to hibernation there. | ||
| 155 | In addition, during two years, we carried out a two-step | 155 | In addition, during two years, we carried out a two-step | ||
| 156 | capture-recapture translocation experiment. In the spring of the first | 156 | capture-recapture translocation experiment. In the spring of the first | ||
| 157 | year, we individually marked 120 males, 60 per sampling band, and | 157 | year, we individually marked 120 males, 60 per sampling band, and | ||
| 158 | translocated 30 of them from close to the road to far from the road, | 158 | translocated 30 of them from close to the road to far from the road, | ||
| 159 | and vice-versa. The remaining 60 males formed two control groups, | 159 | and vice-versa. The remaining 60 males formed two control groups, | ||
| 160 | close and far from the road, respectively. A balanced subsample of 25% | 160 | close and far from the road, respectively. A balanced subsample of 25% | ||
| 161 | of the males was recaptured ~30 days, in average, after the first | 161 | of the males was recaptured ~30 days, in average, after the first | ||
| 162 | capture. Intergroup differences in individual change of body | 162 | capture. Intergroup differences in individual change of body | ||
| 163 | condition, parasite load, and sexual coloration were calculated and | 163 | condition, parasite load, and sexual coloration were calculated and | ||
| 164 | used to quantify the response of the lizards to the road proximity. We | 164 | used to quantify the response of the lizards to the road proximity. We | ||
| 165 | found an effect of the treatment on\nthe lizards: translocated lizards | 165 | found an effect of the treatment on\nthe lizards: translocated lizards | ||
| 166 | lost weight. However, control individuals far from the road | 166 | lost weight. However, control individuals far from the road | ||
| 167 | significantly increased their body condition compared to the rest of | 167 | significantly increased their body condition compared to the rest of | ||
| 168 | experimental groups. Interestingly, these same lizards reduced their | 168 | experimental groups. Interestingly, these same lizards reduced their | ||
| 169 | endoparasite load, suggesting a\nselective impact of the road because | 169 | endoparasite load, suggesting a\nselective impact of the road because | ||
| 170 | no differences were initially detected in parasite load or body | 170 | no differences were initially detected in parasite load or body | ||
| 171 | condition between subpopulations. This was confirmed during the spring | 171 | condition between subpopulations. This was confirmed during the spring | ||
| 172 | of the second year when 30% of the lizards, marked the previous year, | 172 | of the second year when 30% of the lizards, marked the previous year, | ||
| 173 | were recaptured near the road. The variation observed in the traits | 173 | were recaptured near the road. The variation observed in the traits | ||
| 174 | measured confirmed that far-males had higher individual quality. All | 174 | measured confirmed that far-males had higher individual quality. All | ||
| 175 | this together supports the idea that the road exerts a selective | 175 | this together supports the idea that the road exerts a selective | ||
| 176 | effect, producing disruptive selection on the lizards\u2019 phenotype | 176 | effect, producing disruptive selection on the lizards\u2019 phenotype | ||
| 177 | and, therefore, may have an evolutionary impact on this population.", | 177 | and, therefore, may have an evolutionary impact on this population.", | ||
| 178 | "es": "Worldwide roads are in continuous expansion, with an | 178 | "es": "Worldwide roads are in continuous expansion, with an | ||
| 179 | expected increase of >60% by 2050. This may increase selection | 179 | expected increase of >60% by 2050. This may increase selection | ||
| 180 | pressures on wildlife, urging applied ecologist to investigate the | 180 | pressures on wildlife, urging applied ecologist to investigate the | ||
| 181 | adaptive potential of populations to forecast long-term effects. Most | 181 | adaptive potential of populations to forecast long-term effects. Most | ||
| 182 | of the works to date have been individual-focused, obviating the | 182 | of the works to date have been individual-focused, obviating the | ||
| 183 | potential evolutionary impact of these infrastructures on populations | 183 | potential evolutionary impact of these infrastructures on populations | ||
| 184 | of small vertebrates with low migration capability (e.g., lizards). | 184 | of small vertebrates with low migration capability (e.g., lizards). | ||
| 185 | Pressure associated to road proximity can be indirectly derived from | 185 | Pressure associated to road proximity can be indirectly derived from | ||
| 186 | habitat transformation and degradation. We hypothesize that we can | 186 | habitat transformation and degradation. We hypothesize that we can | ||
| 187 | demonstrate the selective effects of a road by comparing lizard | 187 | demonstrate the selective effects of a road by comparing lizard | ||
| 188 | phenotypes between subpopulations differing in proximity to the linear | 188 | phenotypes between subpopulations differing in proximity to the linear | ||
| 189 | infrastructure. Thus, to investigate selective effects as a function | 189 | infrastructure. Thus, to investigate selective effects as a function | ||
| 190 | of road proximity, we selected two150 meter-wide sampling bands of | 190 | of road proximity, we selected two150 meter-wide sampling bands of | ||
| 191 | terrain that were one close to a road and the other one 500 m away | 191 | terrain that were one close to a road and the other one 500 m away | ||
| 192 | from it. We studied differences in vegetation cover, prey | 192 | from it. We studied differences in vegetation cover, prey | ||
| 193 | availability, abundances of aerial predators and lizards, female | 193 | availability, abundances of aerial predators and lizards, female | ||
| 194 | phenology, and hatching date as indicators of habitat quality, | 194 | phenology, and hatching date as indicators of habitat quality, | ||
| 195 | associated to the presence of the road, and as possible drivers of | 195 | associated to the presence of the road, and as possible drivers of | ||
| 196 | subsequent differences in the lizard traits between subpopulations. | 196 | subsequent differences in the lizard traits between subpopulations. | ||
| 197 | Mean values of head and body size, body condition, ecto- and | 197 | Mean values of head and body size, body condition, ecto- and | ||
| 198 | endoparasite loads, tail state, and male nuptial coloration (all | 198 | endoparasite loads, tail state, and male nuptial coloration (all | ||
| 199 | traits associated to individual quality) were compared as base-line | 199 | traits associated to individual quality) were compared as base-line | ||
| 200 | indicators of disruptive selection. Near-males had an earlier | 200 | indicators of disruptive selection. Near-males had an earlier | ||
| 201 | investment of nuptial coloration in life, but coloration was of poor | 201 | investment of nuptial coloration in life, but coloration was of poor | ||
| 202 | quality as compared to far-males. Hatching date was earlier in the far | 202 | quality as compared to far-males. Hatching date was earlier in the far | ||
| 203 | subpopulation, and juveniles were bigger prior to hibernation there. | 203 | subpopulation, and juveniles were bigger prior to hibernation there. | ||
| 204 | In addition, during two years, we carried out a two-step | 204 | In addition, during two years, we carried out a two-step | ||
| 205 | capture-recapture translocation experiment. In the spring of the first | 205 | capture-recapture translocation experiment. In the spring of the first | ||
| 206 | year, we individually marked 120 males, 60 per sampling band, and | 206 | year, we individually marked 120 males, 60 per sampling band, and | ||
| 207 | translocated 30 of them from close to the road to far from the road, | 207 | translocated 30 of them from close to the road to far from the road, | ||
| 208 | and vice-versa. The remaining 60 males formed two control groups, | 208 | and vice-versa. The remaining 60 males formed two control groups, | ||
| 209 | close and far from the road, respectively. A balanced subsample of 25% | 209 | close and far from the road, respectively. A balanced subsample of 25% | ||
| 210 | of the males was recaptured ~30 days, in average, after the first | 210 | of the males was recaptured ~30 days, in average, after the first | ||
| 211 | capture. Intergroup differences in individual change of body | 211 | capture. Intergroup differences in individual change of body | ||
| 212 | condition, parasite load, and sexual coloration were calculated and | 212 | condition, parasite load, and sexual coloration were calculated and | ||
| 213 | used to quantify the response of the lizards to the road proximity. We | 213 | used to quantify the response of the lizards to the road proximity. We | ||
| 214 | found an effect of the treatment on the lizards: translocated lizards | 214 | found an effect of the treatment on the lizards: translocated lizards | ||
| 215 | lost weight. However, control individuals far from the road | 215 | lost weight. However, control individuals far from the road | ||
| 216 | significantly increased their body condition compared to the rest of | 216 | significantly increased their body condition compared to the rest of | ||
| 217 | experimental groups. Interestingly, these same lizards reduced their | 217 | experimental groups. Interestingly, these same lizards reduced their | ||
| 218 | endoparasite load, suggesting a selective impact of the road because | 218 | endoparasite load, suggesting a selective impact of the road because | ||
| 219 | no differences were initially detected in parasite load or body | 219 | no differences were initially detected in parasite load or body | ||
| 220 | condition between subpopulations. This was confirmed during the spring | 220 | condition between subpopulations. This was confirmed during the spring | ||
| 221 | of the second year when 30% of the lizards, marked the previous year, | 221 | of the second year when 30% of the lizards, marked the previous year, | ||
| 222 | were recaptured near the road. The variation observed in the traits | 222 | were recaptured near the road. The variation observed in the traits | ||
| 223 | measured confirmed that far-males had higher individual quality. All | 223 | measured confirmed that far-males had higher individual quality. All | ||
| 224 | this together supports the idea that the road exerts a selective | 224 | this together supports the idea that the road exerts a selective | ||
| 225 | effect, producing disruptive selection on the lizards\u2019 phenotype | 225 | effect, producing disruptive selection on the lizards\u2019 phenotype | ||
| 226 | and, therefore, may have an evolutionary impact on this population." | 226 | and, therefore, may have an evolutionary impact on this population." | ||
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