Demographics and behaviour of<i>Heteragrion cooki</i>, a forest damselfly endemic to Ecuador (Odonata)

Rivas‐Torres, Anais; Sanmartín‐Villar, Iago; Gabela-Flores, María Virginia; Cordero‐Rivera, Adolfo

doi:10.1080/13887890.2017.1336495

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…Our results indicate that survival can or cannot be positively related to larger body size in these damselflies, possibly depending on local ecological conditions. A previous study of another forest damselfly found that in a sunny stream, body size was negatively correlated with survival, but in a shaded environment it was not (Rivas-Torres et al, 2017). Another possibility is that survival may show interannual variation, a suggestion that also merits further study.…”

Section: Discussionmentioning

confidence: 87%

Survival and longevity in neotropical damselflies (Odonata, Polythoridae)

Rivera¹,

Sanmartín‐Villar²,

Herrera³

et al. 2019

Anim. Biodiv. Conserv.

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Longevity among insect orders varies greatly, and has mainly been studied in insects in temperate biomes, where seasonality determines high synchronization of reproductive activities and limits lifespan. Most forest damselflies in tropical regions have low population densities and are almost never observed in copula. We hypothesized that selection will favour a high survival rate and hence high lifespan, allowing the animals to be ready for the occasional events that favour reproduction. We studied two neotropical damselflies, Polythore mutata and P. derivata, in Ecuador, using mark–recapture methods. We found that sex affected the rate of recapture, but daily survival rate was affected by sex only in one population. We found evidence that suggests stabilizing or directional selection on body size. The maximum lifespan was 54–63 days. We conclude that the survival rate of Polythore damselflies in tropical forests is comparable to that of similar damselflies in temperate zones.

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Section: Discussionmentioning

confidence: 87%

Survival and longevity in neotropical damselflies (Odonata, Polythoridae)

Rivera¹,

Sanmartín‐Villar²,

Herrera³

et al. 2019

Anim. Biodiv. Conserv.

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“…The body size of odonates, together with their occurrence in relatively isolated populations at high densities, allows high recapture rates and makes them model organisms for recapture and radio telemetric studies. This is particularly relevant for species restricted to creeks and streams in forest complexes (Corbet, 2004;Kortello & Ham, 2010;Laister, 2012;Lang, Müller, & Waringer, 2001;Moskowitz & May, 2017;Ribeiro Loiola & De Marco, 2011;Rivas-Torres, Sanmartín-Villar, Gabela-Flores, & Cordero-Rivera, 2017).…”

Section: Introductionmentioning

confidence: 99%

Flying activity and population dynamics of Cordulegaster heros Theischinger, 1979 (Insecta: Odonata: Cordulegastridae) in Slovakia

Balázs

Fric

Holuša

2020

International Journal of Odonatology

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In 2017, we investigated the population dynamics and flying activity of the south-east European endemic dragonfly species Cordulegaster heros Theischinger, 1979. This research was conducted in the southern part of Central Slovakia in the Revúcka vrchovina Upland at a submountainous stream called Drienok. The mark-release-recapture method was applied to study the population. Cordulegaster heros was observed 775 times during the midsummer season. We found out that the species has bimodal diurnal activity pattern with a highest peak from 17:00 until 19:00 hours, but the species had a short peak before noon as well. The differences between sexes in the sense of entering new individuals to the population were low during the main flying period. Estimated population size for males surpassed the population size of females. Probability of capture decreased by the end of the flying season without differences in sexes. This article is the first on the flying activity and population dynamics of Cordulegaster heros.

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“…Human-modified environments can trigger fast and intricate adaptive changes in organism traits and fitness ( Carroll et al, 2007 ; Carroll et al, 2014 ; Alberti et al, 2017 ; Rivas-Torres et al, 2017 ). Amphibians can thus adapt to anthropic habitats ( Hua et al, 2015 ), although environmental deterioration often increases mortality ( Schaub & Pradel, 2004 ; Collins & Kays, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Greater reproductive investment, but shorter lifespan, in agrosystem than in natural-habitat toads

Zamora‐Camacho

Comas

2017

PeerJ

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Global amphibian decline is due to several factors: habitat loss, anthropization, pollution, emerging diseases, and global warming. Amphibians, with complex life cycles, are particularly susceptible to habitat alterations, and their survival may be impaired in anthropized habitats. Increased mortality is a well-known consequence of anthropization. Life-history theory predicts higher reproductive investment when mortality is increased. In this work, we compared age, body size, and different indicators of reproductive investment, as well as prey availability, in natterjack toads (Epidalea calamita) from agrosystems and adjacent natural pine groves in Southwestern Spain. Mean age was lower in agrosystems than in pine groves, possibly as a consequence of increased mortality due to agrosystem environmental stressors. Remarkably, agrosystem toads were larger despite being younger, suggesting accelerated growth rate. Although we detected no differences in prey availability between habitats, artificial irrigation could shorten aestivation in agrosystems, thus increasing energy trade. Moreover, agrosystem toads exhibited increased indicators of reproductive investment. In the light of life-history theory, agrosystem toads might compensate for lesser reproductive events—due to shorter lives—with a higher reproductive investment in each attempt. Our results show that agrosystems may alter demography, which may have complex consequences on both individual fitness and population stability.

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Demographics and behaviour ofHeteragrion cooki, a forest damselfly endemic to Ecuador (Odonata)

Cited by 5 publications

References 28 publications

Survival and longevity in neotropical damselflies (Odonata, Polythoridae)

Survival and longevity in neotropical damselflies (Odonata, Polythoridae)

Flying activity and population dynamics of Cordulegaster heros Theischinger, 1979 (Insecta: Odonata: Cordulegastridae) in Slovakia

Greater reproductive investment, but shorter lifespan, in agrosystem than in natural-habitat toads

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