Alternative reproductive tactics in the territorial damselflyCalopteryx maculata: sneaking by older males

Forsyth, Adrian; Montgomerie, Robert

doi:10.1007/bf02395434

Cited by 99 publications

(70 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the observation periods, we also monitored the behaviour of each marked male for several minutes several times during the day using binoculars to determine if it was territorial or not. A male was categorized as being territorial if it was seen to defend a territory and not to change its location during the day, because a male damselfly may not necessarily be territorial throughout its entire reproductive lifespan [35][36][37]. If males are territorial they will stay close to a given area by the riverside near to floating vegetation, and will demonstrate aggression to intra-and interspecific males [33,38].…”

Section: (B) Laboratory Proceduresmentioning

confidence: 99%

Predation selects for increased immune function in male damselflies,Calopteryx splendens

et al. 2010

View full text Add to dashboard Cite

Predation selects for numerous traits in many animal species, with sick or parasitized prey often being at high risk. When challenged by parasites and pathogens, prey with poor immune functions are thus likely to be at a selective disadvantage. We tested the hypothesis that predation by birds selects for increased immune function in a wild population of male damselflies Calopteryx splendens, while controlling for a trait known to be under selection by bird predation, dark wing-spots. We found that selection on both immune function and wing-spot size was significantly positive, and that selection on either trait was independent of selection on the other. We found no evidence of nonlinear quadratic or correlational selection. In contrast to previous studies, we found no phenotypic correlation between immune function and wingspot size. There was also no difference in immune response between territorial and non-territorial males. Our study suggests that predation may be an important agent of selection on the immune systems of prey, and because the selection we detected was directional, has the potential to cause phenotypic change in populations.

show abstract

Section: (B) Laboratory Proceduresmentioning

confidence: 99%

Predation selects for increased immune function in male damselflies,Calopteryx splendens

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In most species males have two different ARTs: a territorial and non-territorial tactic (the non-territorial tactic is sometimes further divided into sneaker and floater tactics) (Buchholtz 1951, Pajunen 1966, Waage 1975, 1979b, 1987, Plaistow 1997, Cordoba-Aguilar and Cordero-Rivera 2005, Koskimaki et al 2009). The ART followed is determined by a male's resource holding potential and is conditional (Forsyth and Montgomerie 1987). Individual males can follow both tactics during their reproductive life.…”

Section: Reproductive Behaviour Of Calopteryx Damselfliesmentioning

confidence: 99%

“…Young males are often non-territorial because important fat reserves required for successful territorial fights have not yet been gained. Also, when males are old, they might have depleted their fat reserves and, therefore, lose their territories (Forsyth andMontgomerie 1987, Tynkkynen et al 2009). Territorial males obtain mates by courting females which use the territory (floating vegetation) as an oviposition site (Buchholtz 1951, Pajunen 1966.…”

Section: Reproductive Behaviour Of Calopteryx Damselfliesmentioning

confidence: 99%

“…Non-territorial males usually search for solitary females along the river (floater males) or patrol near another male's territory and steal approaching females (sneaker males) by forcing them to mate (Pajunen 1966). The main factor determining mating success in Calopteryx is territory ownership and territorial males have higher mating rate (Forsyth andMontgomerie 1987, Plaistow and. Females are usually able to reject males (Pajunen 1966), but forced matings can occur (Cordero 1999, Rivera andAndrés 2002).…”

Section: Reproductive Behaviour Of Calopteryx Damselfliesmentioning

confidence: 99%

“…I test how experimentally increased territorial competition affects male courtship response towards hetero-and conspecific females (III). The territorial and non-territorial reproductive tactics of Calopteryx males are conditional and the mating success between them is very different (Forsyth andMontgomerie 1987, Plaistow and. In study IV the main aim is to quantify the cost of heterospecific courtship to territorial and non-territorial male C. splendens.…”

Section: Aims Of the Thesismentioning

confidence: 99%

See 2 more Smart Citations

The effect of male-male competition and ornament size on mean and variance of courtship intensity towards heterospecific and conspecific females

et al. 2015

View full text Add to dashboard Cite

As species do not live in isolation from each other, they are faced with an elementary choice when searching for a mating partner: a choice between conand heterospecific individuals. Despite the remarkable research effort on hybridization and its avoidance, there are still some less well covered areas, e.g. what is the role of males in hybridization, what patterns are found in sympatric wild populations, what role do alternative reproductive tactics (ARTs) have on the likelihood of heterospecific matings, and what are the true costs of heterospecific interactions. In this thesis I first quantify the frequency of hybridization, backcrossing and heterospecific matings in sympatric wild populations of Calopteryx splendens and C. virgo damselflies in Finland. The possible influence of population densities, relative abundances of the species, and operational sex ratios on the frequency of heterospecific matings is also investigated. The second aim is to investigate how the intensity of territorial competition influences males' reproductive response to a heterospecific female. Finally, I dissect the importance of male ARTs on hybridization propensity and I attempt to quantify the reproductive costs that males' hybridization propensity inflicts among the tactics. The results imply a major role for C. splendens males in heterospecific reproductive interactions between the study species. Especially territorial males seem to be prone to hybridization, and the prevalence of hybridization is increased with a high availability of C. virgo females. Hybridization seems to be costly because there was high discordance between heterospecific mating frequency and observed numbers of hybrids. However, heterospecific courtship did not reduce conspecific mating success. The results also show that C. splendens males are able to adjust their level of heterospecific courtship according to the competitive environment as well as to the ART it follows. My thesis is a step towards understanding the causes of species reproductive interactions in wild populations.

show abstract

Factors affecting site fidelity in a territorial animal,Perithemis tenera

Switzer

1997

Animal Behaviour

View full text Add to dashboard Cite

Alternative reproductive tactics in the territorial damselflyCalopteryx maculata: sneaking by older males

Cited by 99 publications

References 24 publications

Predation selects for increased immune function in male damselflies,Calopteryx splendens

Predation selects for increased immune function in male damselflies,Calopteryx splendens

The effect of male-male competition and ornament size on mean and variance of courtship intensity towards heterospecific and conspecific females

Factors affecting site fidelity in a territorial animal,Perithemis tenera

Contact Info

Product

Resources

About