Variation in counterattack effect against a phytoseiid predator between two forms of the social spider mite, Stigmaeopsis miscanthi

Yano, Junya; Saitô, Yutaka; Chittenden, Anthony R.; Sato, Yuuji

doi:10.1007/s10164-010-0265-6

Cited by 21 publications

(31 citation statements)

References 18 publications

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“…However, the success rates against T. bambusae were 14-23%, barely one half of the ''actual'' success rates (killing ? driving away) observed in a previous study (Yano et al 2011). We thus noticed that there is a difference between the long-term (4-days in the present study) and the short-term (2-days in Yano et al 2011) counterattack success rates.…”

Section: Discussioncontrasting

confidence: 47%

“…By process of elimination, the kin selection hypothesis (Saito 2010) therefore seems the most likely explanation for the difference in male-to-male aggression between the two forms. However, we cannot explain why the counterattack ability of the LW form males is lower than that of the HG form (Yano et al 2011), because there is no difference in predation pressure between the forms. This problem needs to be addressed in a future study.…”

Section: Discussionmentioning

confidence: 80%

“…The lack of any apparent differences in either the phytoseiid predator fauna or in the occurrence frequencies of the predominant predator species between the field populations of the two forms (Table 1), suggests that ''the difference in predator fauna hypothesis'' is incapable of explaining the differences in male-to-male aggression and in counterattack ability between the LW and HG S. miscanthi males (Saito and Sahara 1999;Yano et al 2011). By process of elimination, the kin selection hypothesis (Saito 2010) therefore seems the most likely explanation for the difference in male-to-male aggression between the two forms.…”

Section: Discussionmentioning

confidence: 99%

“…The inexorable habit of HG form males to engage in male-to-male mortal combat renders them inappropriate study materials for observing the male density effect (Yano et al 2011). As such, we selected the LW form to evaluate: (a) male counterattack ability against two predator species and (b) the male density effect on counterattack success.…”

Section: Mitesmentioning

confidence: 99%

“…Thus we omitted any instances where one male killed another during the day prior to the start of the experiments. In order to avoid predators accidentally drowning in the water-soaked cotton walls of the arenas (this occurred quite often in Yano et al 2011) we surrounded the experimental arenas with an additional barrier of tangle-foot (a sticky substance marketed as Fuji TangleÓ, Fuji Yakuhin Kogyo Inc.). Within 4 days, the introduced predator larvae would develop to at least the deutonymph stage (intensive predacious stage) if they could feed upon sufficient numbers of prey.…”

Section: Counterattack Successmentioning

confidence: 99%

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Counterattack success of a social spider mite against two predominant phytoseiid predator species

2011

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A survey was conducted of the predator fauna occurring in and around the nests of the two forms (LW: low male aggression and HG: high male aggression) of Stigmaeopsis miscanthi (Saito) that occur in Japan. Two phytoseiid species, Neoseiulus womersleyi (Schicha) and Typhlodromus bambusae Ehara predominated in S. miscanthi nests and their respective occurrence frequencies were the same in LW form nests as in HG form nests. We examined the counterattack success of S. miscanthi LW form males against these two phytoseiid predators. It was shown that while LW form male(s) could kill or effectively drive the larvae of both predator species out of their nests, there were no significant differences in the male counterattack success rate between 1-male and 2-male defended nests, or against the two predator species. On the other hand, there was a significant difference between the two predator species' behavioral response to male-defended nests.

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Section: Discussioncontrasting

confidence: 47%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Mitesmentioning

confidence: 99%

Section: Counterattack Successmentioning

confidence: 99%

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Counterattack success of a social spider mite against two predominant phytoseiid predator species

2011

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Phylogeography of lethal male fighting in a social spider mite

Sato

Tsuda

Sakamoto

et al. 2019

Ecology and Evolution

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When males fight for access to females, such conflict rarely escalates into lethal fight because the risks and costs involved, that is, severe injury or death, are too high. The social spider mite, Stigmaeopsis miscanthi, does exhibit lethal male fights, and this male–male aggressiveness varies among populations. To understand the evolution of lethal fighting, we investigated aggressiveness in 42 populations and phylogenetic relationships in 47 populations along the Japanese archipelago. By analysis of the male weapon morph, a proxy for aggressiveness, we confirmed the existence of a mildly aggressive (ML) form, besides the low aggression (LW) and high aggression (HG) forms reported earlier. To evaluate demographic history of these three forms, we employed the approximate Bayesian computation approach using mtCOI sequences and taking into consideration the postlast glacial expansion history of the host plant, Miscanthus sinensis . As results, hierarchical split models are more likely to explain the observed genetic pattern than admixture models, and the ML form in the subtropical region was considered the ancestral group. The inferred demographic history was consistent with the one reconstructed for the host plant in a previous study. The LW form was split from the ML form during the last glacial period (20,000–40,000 years BP), and subsequently, the HG form was split from the ML form at the end of or after the last glacial period (5,494–10,988 years BP). The results also suggest that the mite invaded Japan more than once, resulting in the present parapatric distribution of LW and HG forms in eastern Japan.

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Male–male aggression peaks at intermediate relatedness in a social spider mite

Sato

Egas

Sabelis

2013

Ecology and Evolution

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Theory predicts that when individuals live in groups or colonies, male-male aggression peaks at intermediate levels of local average relatedness. Assuming that aggression is costly and directed toward nonrelatives and that competition for reproduction acts within the colony, benefits of aggressive behavior are maximized in colonies with a mix of related and unrelated competitors because aggression hurts nonkin often, thereby favoring reproduction of kin. This leads to a dome-shaped relation between male-male aggression and average relatedness. This prediction has been tested with bacteria in the laboratory, but not with organisms in the field. We study how male-male aggression varies with relatedness in the social spider mite Stigmaeopsis miscanthi. We sampled 25 populations across a wide geographic range between Taiwan and Japan, representing a gradient of high to low within-population relatedness. For each population the weaponry of males was measured as the length of the first pair of legs, and male-male aggression was tested by placing pairs of nonsibling males together and scoring the frequency of male death over a given period. As these two morphological and behavioral variables correlate strongly, they both reflect the intensity of male-male conflict. Our data on the social spider mite show that male-male aggression as well as weapon size strongly peak at intermediate, average relatedness, thereby confirming theoretical predictions.

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Variation in counterattack effect against a phytoseiid predator between two forms of the social spider mite, Stigmaeopsis miscanthi

Cited by 21 publications

References 18 publications

Counterattack success of a social spider mite against two predominant phytoseiid predator species

Counterattack success of a social spider mite against two predominant phytoseiid predator species

Phylogeography of lethal male fighting in a social spider mite

Male–male aggression peaks at intermediate relatedness in a social spider mite

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