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The best timing of mate search in Armadillidium vulgare (Isopoda, Oniscidea).

Beauché F, Richard FJ - PLoS ONE (2013)

Bottom Line: We found that the attractiveness of individuals was mediated by short-distance chemical cues and tested individuals were able to discriminate and prefer individuals of the opposite sex.Moreover, male preference to female increased during their moulting status as they matured.Males were particularly more attracted by females with appearing white calcium plates, which corresponds to the beginning of their higher receptivity period.

View Article: PubMed Central - PubMed

Affiliation: Université de Poitiers, Laboratoire Ecologie et Biologie des Interactions, UMR CNRS 7267, Equipe Ecologie Evolution Symbiose, Poitiers, France. Freddie.jeanne.richard@univ-poitiers.fr

ABSTRACT
Mate choice is mediated by many components with the criteria varying across the animal kingdom. Chemical cues used for mate attractiveness can also reflect mate quality. Regarding the gregarious species Armadillidium vulgare (isopod crustacean), we tested whether individuals can discriminate conspecifics at two different levels (between sex and physiological status) based on olfactory perception. Tested conspecifics were individuals of the same or opposite sex, with the females at different moult stages. We found that the attractiveness of individuals was mediated by short-distance chemical cues and tested individuals were able to discriminate and prefer individuals of the opposite sex. Moreover, male preference to female increased during their moulting status as they matured. Males were particularly more attracted by females with appearing white calcium plates, which corresponds to the beginning of their higher receptivity period. These differences in attractiveness due to sex and physiological status are likely to shape the composition of aggregates and facilitate mate finding and optimize the reproductive success for both males and females. Thus aggregation pheromones could be linked to sex pheromones in terrestrial isopods.

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Related in: MedlinePlus

Time spent by males and females in the right (RS) and left (LS) sections depending on the presence or absence of conspecific in the adjacent section.(F: female, M: male; C/D0 : di-ecdysis and beginning of pre-ecdysis (no calcium plates), Ø = empty section with no individual, see fig. 1; NS: non-significant p≥0.05, ***: p<0.001).
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pone-0057737-g003: Time spent by males and females in the right (RS) and left (LS) sections depending on the presence or absence of conspecific in the adjacent section.(F: female, M: male; C/D0 : di-ecdysis and beginning of pre-ecdysis (no calcium plates), Ø = empty section with no individual, see fig. 1; NS: non-significant p≥0.05, ***: p<0.001).

Mentions: Both males and females spent significantly more time in front of the section harbouring a conspecific of the opposite sex (respectively: Wilcoxon: T = 26, N = 20, P = 0.0016 and T = 14, N = 20, P<0.0001; figure 3). In contrast, when presented with a conspecific of the same sex, they did not show any preference for the inhabited section (respectively: Wilcoxon: T = 72, N = 20, P = 0.109 and T = 66, N = 20, P = 0.07; figure 3).


The best timing of mate search in Armadillidium vulgare (Isopoda, Oniscidea).

Beauché F, Richard FJ - PLoS ONE (2013)

Time spent by males and females in the right (RS) and left (LS) sections depending on the presence or absence of conspecific in the adjacent section.(F: female, M: male; C/D0 : di-ecdysis and beginning of pre-ecdysis (no calcium plates), Ø = empty section with no individual, see fig. 1; NS: non-significant p≥0.05, ***: p<0.001).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3585876&req=5

pone-0057737-g003: Time spent by males and females in the right (RS) and left (LS) sections depending on the presence or absence of conspecific in the adjacent section.(F: female, M: male; C/D0 : di-ecdysis and beginning of pre-ecdysis (no calcium plates), Ø = empty section with no individual, see fig. 1; NS: non-significant p≥0.05, ***: p<0.001).
Mentions: Both males and females spent significantly more time in front of the section harbouring a conspecific of the opposite sex (respectively: Wilcoxon: T = 26, N = 20, P = 0.0016 and T = 14, N = 20, P<0.0001; figure 3). In contrast, when presented with a conspecific of the same sex, they did not show any preference for the inhabited section (respectively: Wilcoxon: T = 72, N = 20, P = 0.109 and T = 66, N = 20, P = 0.07; figure 3).

Bottom Line: We found that the attractiveness of individuals was mediated by short-distance chemical cues and tested individuals were able to discriminate and prefer individuals of the opposite sex.Moreover, male preference to female increased during their moulting status as they matured.Males were particularly more attracted by females with appearing white calcium plates, which corresponds to the beginning of their higher receptivity period.

View Article: PubMed Central - PubMed

Affiliation: Université de Poitiers, Laboratoire Ecologie et Biologie des Interactions, UMR CNRS 7267, Equipe Ecologie Evolution Symbiose, Poitiers, France. Freddie.jeanne.richard@univ-poitiers.fr

ABSTRACT
Mate choice is mediated by many components with the criteria varying across the animal kingdom. Chemical cues used for mate attractiveness can also reflect mate quality. Regarding the gregarious species Armadillidium vulgare (isopod crustacean), we tested whether individuals can discriminate conspecifics at two different levels (between sex and physiological status) based on olfactory perception. Tested conspecifics were individuals of the same or opposite sex, with the females at different moult stages. We found that the attractiveness of individuals was mediated by short-distance chemical cues and tested individuals were able to discriminate and prefer individuals of the opposite sex. Moreover, male preference to female increased during their moulting status as they matured. Males were particularly more attracted by females with appearing white calcium plates, which corresponds to the beginning of their higher receptivity period. These differences in attractiveness due to sex and physiological status are likely to shape the composition of aggregates and facilitate mate finding and optimize the reproductive success for both males and females. Thus aggregation pheromones could be linked to sex pheromones in terrestrial isopods.

Show MeSH
Related in: MedlinePlus