Synchronization of alate emergence among colonies and dispersal strategy in the Ryukyu dry-wood termite Neotermes sugioi (Isoptera: Kalotermitidae)

Sugio, Koji; Miyaguni, Yasushi; Yoshimura, Tsuyoshi

doi:10.1007/s00040-020-00766-5

Cited by 5 publications

(9 citation statements)

References 33 publications

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“…In this condition, the SRV theory predicts female-biased sex allocation 5 . However, in the colonies of N. connexus and N. sugioi, more male alates than female alates were found 14,17 . It remains to be seen if this inconsistency can be explained by the current sex allocation theories.…”

Section: Caste Development and Sex Ratio Of The Ryukyu Drywood Termitementioning

confidence: 92%

Caste development and sex ratio of the Ryukyu drywood termite Neotermes sugioi and its potential mechanisms

Miyaguni

Agarie

Sugio

et al. 2021

Sci Rep

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Sex allocation is one of the most studied traits in evolutionary biology because its theoretical predictions match the empirical data. Here, using the Ryukyu dry-wood termite Neotermes sugioi, we investigated several factors that could bias the sex allocation in three populations (Okinawa, Ishigaki/Iriomote, and Yonaguni). Our survey showed that there were more queen-only colonies than king-only colonies in these populations, suggesting a longer lifespan of the queens than that of the kings. In this condition, sex-asymmetric reproductive value (SRV) theory predicts female bias, because even after the short-lived kings die, the long-lived queens can continue reproduction with their sons. However, sex allocation in this species seemed to be biased toward males. Furthermore, we examined the possibility of intrasexual competition among siblings (ICS). If ICS is the cause of the bias, the allocation is expected to change depending on the total investment in sexual offspring. However, the biomass of both male and female alates increased linearly with the increase in the total biomass of the alates in these populations. Thus, neither the SRV nor the ICS theory could explain the male-biased sex ratio of N. sugioi. On the basis of these results, we discuss the remaining possibilities in this species.

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Section: Caste Development and Sex Ratio Of The Ryukyu Drywood Termitementioning

confidence: 92%

Caste development and sex ratio of the Ryukyu drywood termite Neotermes sugioi and its potential mechanisms

Miyaguni

Agarie

Sugio

et al. 2021

Sci Rep

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“…2018; Sugio et al . 2020). This is due to the fact that species flights, in addition to being associated with environmental conditions, can reflect the characteristics of a specific taxon, such as colony size, nesting site and caste differentiation pattern (Medeiros et al .…”

Section: Discussionmentioning

confidence: 99%

“…In such cases, the flights of certain species, commonly belonging to the Kalotermitidae and Rhinotermitidae families, are registered, i.e. species that can fly for a longer period and withstand a wider range of environmental conditions than most Termitidae species (Medeiros et al 1999;Bourguignon et al 2009;Sugio et al 2018;Sugio et al 2020). This is due to the fact that species flights, in addition to being associated with environmental conditions, can reflect the characteristics of a specific taxon, such as colony size, nesting site and caste differentiation pattern (Medeiros et al 1999;Korb & Schmidinger 2004;Bourguignon et al 2009;Harit et al 2014;Sugio et al 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Considering that the occurrence of these events may reflect species characteristics (Wolda 1988;Nalepa et al 2001), such as life or evolutive history, our first prediction was that (1) more closely related species would have a more similar daily flight pattern, and consequently higher daily synchronism, forming subgroups. We expect that Kalotermitidae and Rhinotermitidae species, for example, would have more equally distributed flights throughout the study period (Medeiros et al 1999;Bourguignon et al 2009;Sugio et al 2018;Sugio et al 2020), whereas Apicotermitinae species are expected to have a highly time-concentrated pattern, as this group is extremely dependent on soil humidity. The second prediction involves the relationship between flights and environmental variables.…”

Section: Introductionmentioning

confidence: 99%

“…2018; Sugio et al . 2020), whereas Apicotermitinae species are expected to have a highly time‐concentrated pattern, as this group is extremely dependent on soil humidity. The second prediction involves the relationship between flights and environmental variables.…”

Section: Introductionmentioning

confidence: 99%

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Accumulated precipitation and air density are linked to termite (Blattodea) flight synchronism in a Seasonally Dry Tropical Forest in north‐eastern Brazil

et al. 2021

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Termite dispersal flights (Blattodea: Termitoidae) are influenced by several factors that are intrinsic and extrinsic to colonies and vary according to the environment and target species. This study aimed to evaluate the main characteristics of the dispersal flights of a termite community and the environmental variables related to these flights in a Seasonally Dry Tropical Forest, situated in the semiarid region of north-eastern Brazil. The alates were collected with trays placed on the ground. Sampling was carried out over a year, with weekly trap reviews. Flight peaks started in February; i.e. these events were more frequent and alates from all species were captured. The trays were checked daily for 40 days during this period. A principal coordinate analysis was performed to determine the response variables and, after that, a generalised linear model was performed to analyse the relationship between these variables and environmental variations. Alates of 37 species were captured and the community flight pattern proved to be synchronised and highly temporally concentrated, regardless of family, subfamily or even genera. The daily sampling analysis showed that 97% of species flights occurred between the 13th and 33rd days following the start of the 40 days of daily revisions. The number of flight occurrences and species composition were significantly influenced by the accumulated precipitation over 72 h and air density. The latter variable was evaluated for the first time in this type of study. The high synchronism between species may be related to the brief period in which arid and semiarid ecosystems have the correct conditions for alate flights, which is different to alate flight occurrence in tropical rainforests, where the environmental conditions usually allow termites to fly throughout the entire year.

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Colony structure and caste distribution in living trees of the Ryukyu drywood termite, Neotermes sugioi (Blattodea: Kalotermitidae) in Okinawa Island

Sugio

Miyaguni

Yoshimura

2020

Journal of Asia-Pacific Entomology

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Synchronization of alate emergence among colonies and dispersal strategy in the Ryukyu dry-wood termite Neotermes sugioi (Isoptera: Kalotermitidae)

Cited by 5 publications

References 33 publications

Caste development and sex ratio of the Ryukyu drywood termite Neotermes sugioi and its potential mechanisms

Caste development and sex ratio of the Ryukyu drywood termite Neotermes sugioi and its potential mechanisms

Accumulated precipitation and air density are linked to termite (Blattodea) flight synchronism in a Seasonally Dry Tropical Forest in north‐eastern Brazil

Colony structure and caste distribution in living trees of the Ryukyu drywood termite, Neotermes sugioi (Blattodea: Kalotermitidae) in Okinawa Island

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