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Divergent patterns of locomotor activity in cave isopods (Oniscidea: Styloniscidae) in Neotropics.
de Souza, Priscila Emanuela; Gonçalves, Bruno da Silva Brandão; Souza-Silva, Marconi; Ferreira, Rodrigo Lopes.
Afiliación
  • de Souza PE; Center of Studies on Subterranean Biology, Department of Ecology and Conservation, Federal University of Lavras, Lavras, Brazil.
  • Gonçalves BDSB; Graduate Program in Applied Ecology, Department of Ecology and Conservation, Federal University of Lavras, Lavras, Brazil.
  • Souza-Silva M; Copacabana Tecnologia da Informacão LTDA, Sumaré, Brazil.
  • Ferreira RL; Center of Studies on Subterranean Biology, Department of Ecology and Conservation, Federal University of Lavras, Lavras, Brazil.
Chronobiol Int ; 41(8): 1199-1216, 2024 Aug.
Article en En | MEDLINE | ID: mdl-39158061
ABSTRACT
In cave environments, stable conditions devoid of light-dark cycles and temperature fluctuations sustain circadian clock mechanisms across various species. However, species adapted to these conditions may exhibit disruption of circadian rhythm in locomotor activity. This study examines potential rhythm loss due to convergent evolution in five semi-aquatic troglobitic isopod species (Crustacea Styloniscidae), focusing on its impact on locomotor activity. The hypothesis posits that these species display aperiodic locomotor activity patterns. Isopods were subjected to three treatments constant red light (DD), constant light (LL), and light-dark cycles (LD 1212), totaling 1656 h. Circadian rhythm analysis employed the Sokolove and Bushell periodogram chi-square test, Hurst coefficient calculation, intermediate stability (IS), and activity differences for each species. Predominantly, all species exhibited an infradian rhythm under DD and LL. There was synchronization of the locomotor rhythm in LD, likely as a result of masking. Three species displayed diurnal activity, while two exhibited nocturnal activity. The Hurst coefficient indicated rhythmic persistence, with LD showing higher variability. LD conditions demonstrated higher IS values, suggesting synchronized rhythms across species. Significant individual variations were observed within species across the three conditions. Contrary to the hypothesis, all species exhibited synchronization under light-dark conditions. Analyzing circadian activity provides insights into organism adaptation to non-cyclical environments, emphasizing the importance of exploring underlying mechanisms.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ritmo Circadiano / Fotoperiodo / Isópodos / Cuevas / Locomoción Límite: Animals Idioma: En Revista: Chronobiol Int Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
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XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ritmo Circadiano / Fotoperiodo / Isópodos / Cuevas / Locomoción Límite: Animals Idioma: En Revista: Chronobiol Int Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido