Does testosterone influence activity budget in the male Greek tortoise ( Testudo graeca graeca )?
Abstract The stimulatory effect of testosterone on male sexual activity is one of the clearest examples linking hormones and behaviors. However, this relationship is complex in Chelonians. We experimentally studied the influence of testosterone levels on the activity budget and space use in male Gre...
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| Veröffentlicht in: | General and comparative endocrinology 2010-06, Vol.167 (2), p.181-189 |
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| creator | Sereau, Matthieu Lagarde, Frédéric Bonnet, Xavier El Mouden, El Hassan Slimani, Tahar Dubroca, Laurent Trouvé, Colette Dano, Stéphanie Lacroix, André |
| description | Abstract The stimulatory effect of testosterone on male sexual activity is one of the clearest examples linking hormones and behaviors. However, this relationship is complex in Chelonians. We experimentally studied the influence of testosterone levels on the activity budget and space use in male Greek tortoises ( Testudo graeca graeca ) during the spring mating season. We first described the annual pattern of changes in plasma testosterone levels in free-ranging animals in Morocco. Two peaks, one in winter and one in summer, corresponded to periods of inactivity; whereas mating periods in spring and to a lesser extent in autumn were associated with low plasma testosterone levels. Second, we experimentally manipulated plasma testosterone levels in free-ranging males, and analyzed the behavioral consequences. The strong contrasts in plasma hormone levels induced by the experimental treatments did not result in changes in activity budget or space use, both in the short-term or more than one month after the beginning of the hormonal treatment. Our results suggest that testosterone levels did not influence directly behavioral activity in this species, either immediately or after a time delay of one month. |
| doi_str_mv | 10.1016/j.ygcen.2010.03.002 |
| format | Article |
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However, this relationship is complex in Chelonians. We experimentally studied the influence of testosterone levels on the activity budget and space use in male Greek tortoises ( Testudo graeca graeca ) during the spring mating season. We first described the annual pattern of changes in plasma testosterone levels in free-ranging animals in Morocco. Two peaks, one in winter and one in summer, corresponded to periods of inactivity; whereas mating periods in spring and to a lesser extent in autumn were associated with low plasma testosterone levels. Second, we experimentally manipulated plasma testosterone levels in free-ranging males, and analyzed the behavioral consequences. The strong contrasts in plasma hormone levels induced by the experimental treatments did not result in changes in activity budget or space use, both in the short-term or more than one month after the beginning of the hormonal treatment. 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Our results suggest that testosterone levels did not influence directly behavioral activity in this species, either immediately or after a time delay of one month.</description><subject>Animals</subject><subject>Dissociated pattern</subject><subject>Endocrinology & Metabolism</subject><subject>Environmental Sciences</subject><subject>Hormonal implant</subject><subject>Hormones</subject><subject>Male</subject><subject>Morocco</subject><subject>Reptiles</subject><subject>Seasons</subject><subject>Sexual behavior</subject><subject>Sexual Behavior, Animal - physiology</subject><subject>Testosterone</subject><subject>Testosterone - blood</subject><subject>Testosterone - physiology</subject><subject>Testudo graeca</subject><subject>Time Factors</subject><subject>Tortoise</subject><subject>Turtles - physiology</subject><issn>0016-6480</issn><issn>1095-6840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkk1vEzEQhi0EoqHwC5CQb9DDhvHXfhwAVQVapEgcKGfLa09Sp5t1sb2R8u_xkrYHLj2NNH7m9cy8Q8hbBksGrP64XR42Fsclh5IBsQTgz8iCQaequpXwnCygYFUtWzghr1LaAoASNXtJTjhwXrOOLYj5GjDRjCmHlDGGEakf18OEo0VqbPZ7nw-0n9wGc3mh-QbpzgxILyPiLc0h5uAT0g_0umhMLtBNNGjNQzj78pq8WJsh4Zv7eEp-f_92fXFVrX5e_rg4X1VWNl2uTNOiq5l1vVoLya1CY7jqJdquEbViwkkuXN863puadwxqKYVSnAlhuo4LcUrOjro3ZtB30e9MPOhgvL46X-k5V6bnLZN8zwr7_sjexfBnKo3rnU8Wh8GMGKakG9UJaI-qT5BCqLJKJQspjqSNIaWI68cmGOjZML3V_wzTs2EaRGmIl6p39_pTv0P3WPPgUAE-HQEsu9t7jDpZP7vjfESbtQv-iQ8-_1dvBz96a4ZbPGDahimOxRbNdOIa9K_5ZuaTYeVaoFWN-AsJKro1</recordid><startdate>20100601</startdate><enddate>20100601</enddate><creator>Sereau, Matthieu</creator><creator>Lagarde, Frédéric</creator><creator>Bonnet, Xavier</creator><creator>El Mouden, El Hassan</creator><creator>Slimani, Tahar</creator><creator>Dubroca, Laurent</creator><creator>Trouvé, Colette</creator><creator>Dano, Stéphanie</creator><creator>Lacroix, André</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7QG</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-1861-0507</orcidid><orcidid>https://orcid.org/0000-0001-6150-8199</orcidid></search><sort><creationdate>20100601</creationdate><title>Does testosterone influence activity budget in the male Greek tortoise ( Testudo graeca graeca )?</title><author>Sereau, Matthieu ; 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| subjects | Animals Dissociated pattern Endocrinology & Metabolism Environmental Sciences Hormonal implant Hormones Male Morocco Reptiles Seasons Sexual behavior Sexual Behavior, Animal - physiology Testosterone Testosterone - blood Testosterone - physiology Testudo graeca Time Factors Tortoise Turtles - physiology |
| title | Does testosterone influence activity budget in the male Greek tortoise ( Testudo graeca graeca )? |
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