Fitness and Sex Allocation of &lt;I&gt;Anisopteromalus calandrae&lt;/I&gt; (Hymenoptera: Pteromalidae): Relative Fitness of Large Females and Males in a Multi-Patch System

Ji, Jungyoun; Choi, Won Il; Ryoo, Mun Il

doi:10.1603/0013-8746(2004)097[0825:fasaoa]2.0.co;2

Cited by 16 publications

(14 citation statements)

References 24 publications

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“…Previously mated males have enough sperm to fertilize females in a single mating but are at a disadvantage after double mating. This shows that A. calandrae males are able to divide their limited sperm stock among at least six successive females (verified under other conditions by Ji et al., 2004). Sperm counts showed that older males have greater amounts of sperm and may generally be more represented in offspring paternity than younger ones.…”

Section: Discussionsupporting

confidence: 56%

“…Because of protandry (Ji et al., 2004), 24‐h‐old virgin males and 2‐h‐old virgin females were used. Only R females were used in the experiment, because their daughters’ phenotype reflects the sperm used for fertilization.…”

Section: Methodsmentioning

confidence: 99%

“…We used the hymenopteran Anisopteromalus calandrae (Howard) (Hymenoptera: Pteromalidae). This parasitoid wasp forms crowded populations in leguminous seed storehouses (van den Assem et al., 1984; Ji et al., 2004) where bruchid (Coleoptera) hosts are abundant. Individuals are long‐lived (several weeks), inducing strong competition between males for access to young virgin females.…”

Section: Introductionmentioning

confidence: 99%

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Effects of age and repeated mating on male sperm supply and paternity in a parasitoid wasp

Bressac¹,

Khanh

Chevrier

2009

Entomologia Exp Applicata

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International audiencePost-copulatory paternity biases after female multiple mating are major constraints on both male and female reproductive systems. The outcome of paternity in certain situations is only controlled directly by male sperm stock. This was tested experimentally in the parasitoid wasp Anisopteromalus calandrae (Howard) (Hymenoptera: Pteromalidae), in which sperm stocks are small (several hundred) and the fertilizing efficiency of stored sperm is high (the ratio of sperm stored/fertilized eggs is about 0.75). Sperm in seminal vesicles and paternity of males of different status (virgin young, virgin old, or young previously mated) were measured after female single and double mating. The amount of sperm in the seminal vesicle differed according to male status (increasing from previously mated males to old males), but there was no difference in sperm stored by females after a single mating. In double mating experiments with two males of different status, paternity increased linearly with the relative amount of sperm in seminal vesicles. Paternity distribution conforms to ‘a fair raffle' of sperm from both donors following complete mixing of sperm prior to fertilization. Thus, in a female multiple mating context, male fitness depends principally on their sperm stock, which in turn depends on life history parameters, such as age and previous mating

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Section: Discussionsupporting

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of age and repeated mating on male sperm supply and paternity in a parasitoid wasp

Bressac¹,

Khanh

Chevrier

2009

Entomologia Exp Applicata

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“…When comparing D. melanogaster to M. domestica, large host size increased a female's ability to forage and a mate's ability to mate (Morris and Fellowes 2002). Also, for certain parasitoids, female size and dispersal ability relate to net reproduction (see Ji, Choi, and Ryoo 2004). Puparium metrics indicate that A. fraterculus and A. obliqua have the longest and most voluminous puparia, while D. melanogaster have the smallest puparia.…”

Section: Discussionmentioning

confidence: 99%

Host exploitation and contest behavior in a generalist parasitoid partially reflect quality of distinct host species

Wyckhuys

Acosta

Garcia

et al. 2011

Biocontrol Science and Technology

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Information use determines parasitoid adaptive behavior in general, and host specialization or fitness in specific. Information regarding host suitability could affect sex allocation behavior, host exploitation, or aggressiveness in dyadic contests. In this paper, we relate aggressiveness of the pupal parasitoid Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae) with sex allocation and host exploitation when presented with different host species. More specifically, we presented parasitoids with puparia of five different Dipteran species: Drosophila melanogaster (Drosophilidae), Musca domestica (Muscidae), Anastrepha obliqua, Anastrepha fraterculus, and Ceratitis capitata (Tephritidae). Puparia of above species greatly varied in size and volume, were parasitized to differing extent and had varying fitness implications for P. vindemmiae. Using a composite measure of selected fitness currencies (i.e., parasitism level, offspring size, longevity and sex ratio), we typified D. melanogaster and A. obliqua as 'low quality' hosts for P. vindemmiae while puparia of C. capitata and A. fraterculus were considered of 'high quality'. In contest dyads, female aggressiveness and host exploitation behavior differed between host species. Wasps exhibited highest frequencies of antennal striking and rival pursuit, and high degrees of puparium mounting, antennating and probing on C. capitata. Antennal striking frequency however was equally high on 'low quality' hosts such as D. melanogaster and A. obliqua. This work shows that a generalist parasitoid such as P. vindemmiae assesses host quality when confronted with hosts of differing species, size or nutritional suitability and employs such to define sex allocation, host exploitation, and contest behavior. However, contest and exploitation behavior only partially indicate host quality and broader parasitoid fitness implications. This work has further implications for parasitoid mass rearing and use of P. vindemmiae for biological control of Dipteran pests.

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“…Because of the short life span of females (ϳ15 d) (Ji et al 2004) and physical weakness, A. calandrae proved too sensitive to the disinfecting procedure, and therefore the parasitoids used in this study were raised on disinfected rice weevils in autoclaved jars with 150 g of brown rice.…”

Section: Methodsmentioning

confidence: 99%

Effects of Biological Control of Rice Weevil by <I>Anisopteromalus calandrae</I> with a Population of Two <I>Aspergillus</I> spp.

Yoon

Nam

Ryoo

2009

Self Cite

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In this study, we assessed the interaction occurring between the rice weevil and two storage molds (Aspergillus candidus Link and Aspergillus niger Van Tiegem) that prefer different moisture regimens under rice storage conditions. Rice weevil induced rapid population growth in both of the storage molds. The colony forming units (CFUs) of A. candidus and A. niger peaked at 10(9.00 +/- 0.02) and 10(7.72 +/- 0.03)/g, respectively. All of the rice grains were infested with the molds and eventually deteriorated; in the jars infested with A. candidus, no living weevils were found after 135 d. Suppression of the rice weevil by its larval parasitoid, Anisopteromalus calandrae (Howard), significantly retarded the growth of A. candidus but completely halted the growth of A. niger, which was replaced by xerophyllic molds including Aspergillus penicilloides Spegazzini and Wallemia sebi (Fries). Regression analyses showed that the total number of weevils was a significant factor explaining grain moisture content, which was in turn a significant factor in the growth of both mold species. The growth of A. niger was dependent on the grain moisture content (r2 = 0.52), thereby suggesting that the growth of A. niger was caused primarily by activity of the rice weevil and the resulting increased grain moisture content. However, 27% of the growth of A. candidus was explained by grain moisture contents, suggesting that a factor other than the grain moisture content may also affect its growth. Suppression of rice weevil by A. calandrae could induce an A. candidus-dominant molds community, which would be a factor for consideration in biological control program.

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Fitness and Sex Allocation of <I>Anisopteromalus calandrae</I> (Hymenoptera: Pteromalidae): Relative Fitness of Large Females and Males in a Multi-Patch System

Cited by 16 publications

References 24 publications

Effects of age and repeated mating on male sperm supply and paternity in a parasitoid wasp

Effects of age and repeated mating on male sperm supply and paternity in a parasitoid wasp

Host exploitation and contest behavior in a generalist parasitoid partially reflect quality of distinct host species

Effects of Biological Control of Rice Weevil by <I>Anisopteromalus calandrae</I> with a Population of Two <I>Aspergillus</I> spp.

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