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Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle

Many species show rhythmicity in activity, from the timing of flowering in plants to that of foraging behavior in animals. The free-running periods and amplitude (sometimes called strength or power) of circadian rhythms are often used as indicators of biological clocks. Many reports have shown that...

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Autores principales: Abe, Masato S., Matsumura, Kentarou, Yoshii, Taishi, Miyatake, Takahisa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7808652/
https://www.ncbi.nlm.nih.gov/pubmed/33444354
http://dx.doi.org/10.1371/journal.pone.0245115
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author Abe, Masato S.
Matsumura, Kentarou
Yoshii, Taishi
Miyatake, Takahisa
author_facet Abe, Masato S.
Matsumura, Kentarou
Yoshii, Taishi
Miyatake, Takahisa
author_sort Abe, Masato S.
collection PubMed
description Many species show rhythmicity in activity, from the timing of flowering in plants to that of foraging behavior in animals. The free-running periods and amplitude (sometimes called strength or power) of circadian rhythms are often used as indicators of biological clocks. Many reports have shown that these traits are highly geographically variable, and interestingly, they often show latitudinal or longitudinal clines. In many cases, the higher the latitude is, the longer the free-running circadian period (i.e., period of rhythm) in insects and plants. However, reports of positive correlations between latitude or longitude and circadian rhythm traits, including free-running periods, the power of the rhythm and locomotor activity, are limited to certain taxonomic groups. Therefore, we collected a cosmopolitan stored-product pest species, the red flour beetle Tribolium castaneum, in various parts of Japan and examined its rhythm traits, including the power and period of the rhythm, which were calculated from locomotor activity. The analysis revealed that the power was significantly lower for beetles collected in northern areas than southern areas in Japan. However, it is worth noting that the period of circadian rhythm did not show any clines; specifically, it did not vary among the sampling sites, despite the very large sample size (n = 1585). We discuss why these cline trends were observed in T. castaneum.
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spelling pubmed-78086522021-02-02 Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle Abe, Masato S. Matsumura, Kentarou Yoshii, Taishi Miyatake, Takahisa PLoS One Research Article Many species show rhythmicity in activity, from the timing of flowering in plants to that of foraging behavior in animals. The free-running periods and amplitude (sometimes called strength or power) of circadian rhythms are often used as indicators of biological clocks. Many reports have shown that these traits are highly geographically variable, and interestingly, they often show latitudinal or longitudinal clines. In many cases, the higher the latitude is, the longer the free-running circadian period (i.e., period of rhythm) in insects and plants. However, reports of positive correlations between latitude or longitude and circadian rhythm traits, including free-running periods, the power of the rhythm and locomotor activity, are limited to certain taxonomic groups. Therefore, we collected a cosmopolitan stored-product pest species, the red flour beetle Tribolium castaneum, in various parts of Japan and examined its rhythm traits, including the power and period of the rhythm, which were calculated from locomotor activity. The analysis revealed that the power was significantly lower for beetles collected in northern areas than southern areas in Japan. However, it is worth noting that the period of circadian rhythm did not show any clines; specifically, it did not vary among the sampling sites, despite the very large sample size (n = 1585). We discuss why these cline trends were observed in T. castaneum. Public Library of Science 2021-01-14 /pmc/articles/PMC7808652/ /pubmed/33444354 http://dx.doi.org/10.1371/journal.pone.0245115 Text en © 2021 Abe et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Abe, Masato S.
Matsumura, Kentarou
Yoshii, Taishi
Miyatake, Takahisa
Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title_full Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title_fullStr Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title_full_unstemmed Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title_short Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
title_sort amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7808652/
https://www.ncbi.nlm.nih.gov/pubmed/33444354
http://dx.doi.org/10.1371/journal.pone.0245115
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