Reproductive interference between Nehalennia damselfly species

Gossum, Hans Van; Beirinckx, Kirsten; Forbes, Mark R.; Sherratt, Thomas N.

doi:10.2980/1195-6860(2007)14[1:ribnds]2.0.co;2

Cited by 19 publications

(25 citation statements)

References 2 publications

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“…However for Lestes spp., the host species that was expected to be more locally abundant had higher parasitism, a similar result as found for Nehalennia in which the widespread host is also more locally abundant (Van Gossum et al 2007). Our results leave two important issues unresolved.…”

Section: Discussionsupporting

confidence: 65%

“…Although we did not measure which species was most abundant in each species pair for this study, we do note that various types of studies in our study area have been done over the years. Those previous studies requiring sufficient samples sizes have concentrated on the following damselfly (Odonata: Zygoptera) species that are relatively abundant compared with congeners, Enallagma boreale Selys (Hecker et al, 2002); Calopteryx maculata Beauvois (Forsyth & Montgomerie, 1987); Nehalennia irene Hagen (Van Gossum et al, 2007); Lestes forcipatus Rambur (Yourth et al, 2002); Argia moesta Hagen (M. R. Forbes, unpublished); and, Ischnura verticalis Say (Mlynarek et al, 2011). When this coarse index of relative abundance is considered, it appears the most abundant species based on researchers' preferences was also the most widespread species in five of six instances where this comparison could be undertaken (Table 1).…”

Section: Zygoptera Collectionmentioning

confidence: 99%

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Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Mlynarek

Hassall

Forbes

2012

Ecological Entomology

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Short running head: Sibling damselfly spp. and gregarine parasitism 3 ABSTRACT 1. This study investigated interspecific variation in parasitism by gregarines (Eugregarinorida: Actinocephalidae), among sibling species of damselflies (Odonata: Zygoptera), in relation to relative size of geographical ranges of host species. 2. Gregarines are considered generalist parasites, particularly for taxonomically related host species collected at the same sites or area. Prevalence and median intensity of gregarine parasitism was obtained for 1,338 adult damselflies, representing 14 species (seven sibling species pairs) across three families within the suborder Zygoptera. Damselflies were collected at six local sites in Southeastern Ontario, during same periods over the season. 3. Six of seven species pairs had significant differences in parasitism between sibling species.The less widespread host species was the more parasitized for three species pairs with significant differences in gregarine prevalence, and for three species pairs with differences in median intensity. The more widespread host had higher prevalence of infection as expected, in the fourth species pair.. 4. Future studies on ecological determinants of parasitism among related species should examine robust measures of abundance of species and representation of species regionally.

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Section: Discussionsupporting

confidence: 65%

Section: Zygoptera Collectionmentioning

confidence: 99%

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Mlynarek

Hassall

Forbes

2012

Ecological Entomology

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“…Biological invasions, therefore, may be one of the most promising settings in nature for finding an Allee effect generated by reproductive interference. On the other hand, several studies have documented reproductive interference between originally sympatric species (e.g., McLain and Pratt 1999;Hettyey and Pearman 2003;Van Gossum et al 2007), suggesting that it has the potential to produce Allee effects in sympatric species as well.…”

Section: Discussionmentioning

confidence: 99%

The presence of heterospecific males causes an Allee effect

Kyogoku¹,

Nishida

2012

Population Ecology

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The Allee effect is a positive causal relationship between any component of fitness and population density or size. Allee effects strongly affect the persistence of small or sparse populations. Predicting Allee effects remains a challenge, possibly because not all causal mechanisms are known. We hypothesized that reproductive interference (an interspecific reproductive interaction that reduces the fitness of the species involved) can generate an Allee effect. If the density of the interfering species is constant, an increase in the population of the species receiving interference may dilute the per capita effect of reproductive interference and may generate an Allee effect. To test this hypothesis, we examined the effect of heterospecific males on the relationship between per capita fecundity and conspecific density in Callosobruchus chinensis and C. maculatus. Of the two species, only C. maculatus females suffer reproductive interference from heterospecific males. Only C. maculatus, the species susceptible to reproductive interference, demonstrated an Allee effect, and only when heterospecific males were present. In contrast, C. chinensis, the species not susceptible to reproductive interference, demonstrated no Allee effect regardless of the presence of heterospecific males. Our results show that reproductive interference in fact generated an Allee effect, suggesting the potential importance of interspecific sexual interactions especially in small or sparse populations, even in the absence of a shared resource. It may be possible to predict Allee effects produced by this mechanism a priori by testing reproductive interference between closely related species.

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“…, ,c) and Nehalenia (Van Gossum et al. ). Given that the aim of this study was to examine the relative importance of ecological and nonecological forces in fuelling species diversity in damselflies, only those genera for which sufficient information was available for both categories were selected.…”

Section: Criteria For Genera Selection and Phylogenetic Relationshipsmentioning

confidence: 99%

Nonadaptive radiation in damselflies

Wellenreuther

Sánchez-Guillén

2015

Evolutionary Applications

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Adaptive radiations have long served as living libraries to study the build‐up of species richness; however, they do not provide good models for radiations that exhibit negligible adaptive disparity. Here, we review work on damselflies to argue that nonadaptive mechanisms were predominant in the radiation of this group and have driven species divergence through sexual selection arising from male–female mating interactions. Three damselfly genera (Calopteryx,Enallagma and Ischnura) are highlighted and the extent of (i) adaptive ecological divergence in niche use and (ii) nonadaptive differentiation in characters associated with reproduction (e.g. sexual morphology and behaviours) was evaluated. We demonstrate that species diversification in the genus Calopteryx is caused by nonadaptive divergence in coloration and behaviour affecting premating isolation, and structural differentiation in reproductive morphology affecting postmating isolation. Similarly, the vast majority of diversification events in the sister genera Enallagma and Ischnura are entirely driven by differentiation in genital structures used in species recognition. The finding that closely related species can show negligible ecological differences yet are completely reproductively isolated suggests that the evolution of reproductive isolation can be uncoupled from niche‐based divergent natural selection, challenging traditional niche models of species coexistence.

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Reproductive interference between Nehalennia damselfly species

Cited by 19 publications

References 2 publications

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

Higher gregarine parasitism often in sibling species of host damselflies with smaller geographical distributions

The presence of heterospecific males causes an Allee effect

Nonadaptive radiation in damselflies

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