Order Odonata

Suhling, Frank; Sahlén, Göran; Gorb, Stanislav N.; Kalkman, Vincent J.; Dijkstra, Klaas‐Douwe B.; Tol, Jan van

doi:10.1016/b978-0-12-385026-3.00035-8

Cited by 86 publications

(61 citation statements)

References 88 publications

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“…This has been shown in several insect species (Parsons, ; Sota & Mogi, ; Hercus & Hoffmann, ; but see Potter & Woods, ). In addition, female odonates that lay eggs in plant stems above the surface of the water protect them from desiccation by producing thicker egg shells, specifically a thick layer called the exochorion (Suhling et al , ). Interestingly, the intermediate‐sized eggs of the southern population did not result in intermediate‐sized hatchlings.…”

Section: Discussionmentioning

confidence: 99%

A large‐scale latitudinal pattern of life‐history traits in a strictly univoltine damselfly

Śniegula

Gołąb

Johansson

2016

Ecological Entomology

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1. Variation in thermal conditions and season length along latitudinal gradients affect body size‐related traits over different life stages. Selection is expected to optimise these size traits in response to the costs and benefits. 2. Egg, hatchling, larval and adult size in males and females were estimated along a latitudinal gradient of 2730 km across Europe in the univoltine damselfly Lestes sponsa, using a combination of field‐collection and laboratory‐rearing experiments. In the laboratory, individuals were grown in temperatures and photoperiod simulating those at the latitude of origin, and in common‐garden conditions. 3. The size of adults sampled in nature was negatively correlated with latitude. In all populations the females were larger than the males. Results from simulated and common‐garden rearing experiments supported this pattern of size difference across latitudes and between sexes, suggesting a genetic component for the latitudinal size trend and female‐biased size dimorphism. In contrast, hatchling size showed a positive relationship with latitude, but egg size, although differing between latitudes, showed no such relationship. 4. The results support a converse Bergmann cline, i.e. a negative body size cline towards the north. This negative cline in body size is probably driven by progressively stronger seasonal time and temperature constraints towards the higher latitudes and by the obligate univoltine life cycle of L. sponsa. As egg size showed no relationship with latitude, other environmental factors besides temperature, such as desiccation risk, probably affect this trait.

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Section: Discussionmentioning

confidence: 99%

A large‐scale latitudinal pattern of life‐history traits in a strictly univoltine damselfly

Śniegula

Gołąb

Johansson

2016

Ecological Entomology

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“…Although the temperature is accordingly higher in the spring-summer months, the climate in the Azores is temperate with only minor temperature fluctuations throughout the year because of the influence of the ocean. Azorean temperatures also seem to hover around the optimal temperatures for larval growth, 20-30°C (see Suhling et al 2015). Therefore, we suggest that seasonal variations in photoperiod influence the growth of Azorean odonates more than the rather limited variations in temperature do.…”

Section: Discussionmentioning

confidence: 85%

“…In fact, the number of generations per year in odonates usually decreases with latitude (for instance, in the tropical areas, most Odonata species are multi-or bivoltine; the opposite is the case at high latitudes, where most species are semivoltine) (Corbet et al 2006), and intraspecific variation in voltinism is related to latitude (Johansson 2003). The optimal temperature values for growth range between 20°C and more than 30°C, although this factor has not been deeply investigated (Suhling et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Larval development and growth ratios of Odonata of the Azores

et al. 2016

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To fully understand odonate life cycles, it is vital to analyse the patterns of larval growth, which are tightly associated with variations in environmental factors. However, the identification of larval instars is often difficult, especially for early development stages. We hypothesise that pond hydroperiod influences odonate larval growth, and test this idea with novel information about the environmental characteristics of 12 study ponds in Terceira Island (Azores). This study, which represents the first analysis of larval development of Odonata in the Azores, involved determining the instars of development and growth ratios. We measured the morphological characteristics of 898 Odonata larvae, and found that they significantly differed between temporary and permanent ponds. To estimate the larval instars, we used two methods: frequency distribution methods and correlation diagrams between body characteristics. The first method was the most effective, allowing the estimation of 17 instars for Anax imperator, 13 for Sympetrum fonscolombii and 10 for Ischnura hastata, as well as growth ratios between instars for head width, total length, abdomen length, wings and antenna length. Our results also suggest that a combination of the two methods is the most appropriate strategy for estimating the number of instars and growth ratios during larval development.

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“…High adult density in a riparian zone is a common phenomenon in dragonfl ies because most activities associated with their reproduction take place in the immediate surroundings of aquatic habitats (e.g. Corbet, 1999;Suhling et al, 2015). Adults used riparian vegetation growing along the embankments of intensively managed ponds (not their natal site) for pairing and copulation.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, occurrence of adult odonates outside aquatic habitats may be associated with their dispersal (Suhling et al, 2015), and this may be infl uenced by landscape structure (e.g. Watts et al, 2004).…”

Section: Introductionmentioning

confidence: 99%