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Stressful environments favor deceptive alternative mating tactics to become dominant.
Albo, Maria J; Pavón-Peláez, Camila; Villar, Mauro Martínez; Buzatto, Bruno A; Tomasco, Ivanna.
Afiliação
  • Albo MJ; Sección Entomología, Facultad de Ciencias, Universidad de La República, Montevideo, Uruguay. mjalbograna@gmail.com.
  • Pavón-Peláez C; Departamento de Ecología y Biología Evolutiva, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay. mjalbograna@gmail.com.
  • Villar MM; Programa de Desarrollo de las Ciencias Básicas (PEDECIBA), Universidad de La República, Montevideo, Uruguay. mjalbograna@gmail.com.
  • Buzatto BA; Sección Entomología, Facultad de Ciencias, Universidad de La República, Montevideo, Uruguay.
  • Tomasco I; Programa de Desarrollo de las Ciencias Básicas (PEDECIBA), Universidad de La República, Montevideo, Uruguay.
BMC Biol ; 21(1): 162, 2023 07 27.
Article em En | MEDLINE | ID: mdl-37501205
BACKGROUND: Deceptive alternative mating tactics are commonly maintained at low frequencies within populations because males using them are less competitive and acquire lower fitness than those using dominant tactics. However, the successful invasion of a male deceptive tactic is plausible if deception carries no fitness cost to females. Among populations of the gift-giving spider Paratrechalea ornata, males very often offer females a deceptive worthless gift, rather than a nutritive gift. We tested the degree to which deceptive worthless gifts can occur in natural populations living under divergent environmental conditions (moderate and stressful). We examined the plasticity of morphological and behavioral traits and analyzed the fitness of females in relation to the gift type, also examining the paternity acquired by males offering either gift type. RESULTS: We demonstrated that worthless gifts can become dominant under highly stressful environmental conditions (84-100%). Individuals in such environment reach smaller sizes than those in moderate conditions. We suggest that the size reduction probably favors low metabolic demands in both sexes and may reduce the costs associated with receiving deceptive worthless gifts for females. In contrast, males living under moderate conditions varied the use of the deceptive tactic (0-95%), and worthless gifts negatively influenced female fecundity. Furthermore, male size, rather than gift content, positively impacted paternity success in the moderate but not in the stressful environment. CONCLUSIONS: Overall, this is the first empirical evidence that a reversible deceptive tactic can become dominant when the environment becomes harsh and mate choice becomes limited.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Aranhas Limite: Animals Idioma: En Revista: BMC Biol Assunto da revista: BIOLOGIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Uruguai País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Sexual Animal / Aranhas Limite: Animals Idioma: En Revista: BMC Biol Assunto da revista: BIOLOGIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Uruguai País de publicação: Reino Unido