Stridulation and Behavior in Two Southeastern Ips Bark Beetles (Coleoptera: Scolytidae)

Wilkinson, Robert; McClelland, W. T.; Murillo, Ruth M.; Ostmark, E. O.

doi:10.2307/3493300

Cited by 44 publications

(49 citation statements)

References 6 publications

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“…Stridulations that are of sexual significance have also been reported in a number of other coleopterans (Barr 1969;Claridge 1968;Mampe and Neunzig 1966;Michael and Rudinsky 1972;Wilkinson et al 1967). Apart from the courtship and mating stridulations, male O. rhinoceros were also found to produce stridulatory sound during aggressive encounters with other males.…”

Section: Different Kinds Of Stridulationsmentioning

confidence: 73%

Stridulation in the coconut rhinoceros beetleOryctes rhinoceros (Coleoptera: Scarabaeidae)

Mini

Prabhu

1990

Proc Ani Sci

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Ahstract. The coconut rhinoceros beetle Orycres rhinoceros produces different kinds of stridulatory sound under different conditions. Intense stridulations are made quite frequently by the male during courtship and mating attempts. Males also produce characteristic stridulations during aggressive encounters with other beetles, and distress stridulations, when disturbed manually. Females also stridulate, though less frequently. Sexually immature females produce feeble repellence stridulations while courted by males. Gravid females, when confined with males, are found to mimic the courtship and mating behaviour of the males, meanwhile producing intense stridulations resembling male courtship and mating stridulation. This behaviour, presumably has an ovipository motive and. to our knowledge, is the first instance of 'pseudomale' activity to be reported in insects.Stridulatory mechanism comprises rubbing of a specialised region along the margin of the apex of the elytron -the pars stridens, against a series of striations -the plectrum, occupying the dorsum of the 7th abdominal tergite, Stridulation is possible with a single pars stridens, either of the left or right elytron, both being identical. No sexually dimorphic difference is apparent in the pars stridens. Plectral structure exhibits sexual dimorphism, being much prominent in the male.Wing-locking is necessary to keep the elytra in the stridulatory position. locking is elTected by a longitudinal flange along the median side of one elytron (either the left or right, irrespective of the sex) fitting into a corresponding depression along the other. This differs from the reported cases in other coleopterans in which the flange of the left elytron extends under the right when locked.

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Section: Different Kinds Of Stridulationsmentioning

confidence: 73%

Stridulation in the coconut rhinoceros beetleOryctes rhinoceros (Coleoptera: Scarabaeidae)

Mini

Prabhu

1990

Proc Ani Sci

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“…Female I. avulsus, I. calligraphus, and I. grandicollis all have stridulatory organs on their heads (Wilkinson 1962). Female I. calligraphus stridulate at the entrance of male I. calligraphus nuptial chambers, and only once a female stridulates is she allowed entrance to the nuptial chamber (Wilkinson et al 1967). It is not known whether females of the three southern Ips produce species-speciÞc stridulatory signals.…”

Section: Discussionmentioning

confidence: 99%

Role of Ipsdienol, Ipsenol, and cis-Verbenol in Chemical Ecology of Ips avulsus, Ips calligraphus, and Ips grandicollis (Coleoptera: Curculionidae: Scolytinae)

et al. 2012

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Stressed or damaged pine (Pinus sp.) trees in the southeastern United States are often colonized simultaneously by three southern Ips species (Coleoptera: Curculionidae: Scolytinae): small southern pine engraver, Ips avulsus (Eichhoff); sixspined ips, Ips calligraphus (Germar); and eastern Þvespined ips, Ips grandicollis (Eichhoff). All three species mediate colonization of host material with volatile pheromones. All of the southern Ips produce cis-verbenol, and either ipsdienol or ipsenol, and electrophysiological studies have demonstrated that all three southern Ips are able to detect all three compounds. This study examined the role of ipsdienol, ipsenol, and cis-verbenol in the chemical ecology of the southern Ips in Georgia and Louisiana. The most attractive blends of pheromones, with the fewest number of components, were ipsdienol plus ipsenol for I. avulsus, cis-verbenol plus ipsdienol for I. calligraphus, and either cis-verbenol plus ipsenol or ipsdienol plus ipsenol for I. grandicollis. Cross-attraction of I. grandicollis to the pheromone blend most attractive to I. avulsus was observed. Although the presence of heterospeciÞc pheromone reduced the catches of all three species (i.e., the tertiary blend captured fewer beetles than the most attractive binary blends) in both states (signiÞcantly in two cases), high numbers of all three species were still captured in traps baited with all three compounds. These results suggest that the pheromones cis-verbenol, ipsdienol, and ipsenol can be combined for monitoring all three species of the southern Ips simultaneously. KEY WORDS Ips, aggregation pheromone, reproductive isolation, ScolytidaeEngraver beetles (Coleoptera: Curculionidae: Scolytinae: Ips DeGeer) spend most of their lives under bark in the trunk and larger branches of dead, dying, downed, or stressed pines (Pinus spp.) where adults mate and larvae feed and develop on phloem tissue (Furniss and Carolin 1977). Males are the pioneer sex and tunnel into the phloem, excavate a nuptial chamber, and release an aggregation pheromone to attract conspeciÞcs. This pheromone-mediated mass attack behavior facilitates the rapid location and exploitation of available host material and the successful colonization of living pines.

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“…However, cross attraction between lecontei and confums, rnontanus, and paraconfusus is relatively weak (D. L. Wood and Lanier, unpub. In addition to pheromones, stridulation may enforce breeding isolation of lecontei from hoppingi, confusus, and cribricollis because it serves as a courtship call which induces the male to allow the female to enter the nuptial chamber (Wilkinson et al 1967;Barr 1969). I. hoppingi has not been tested for response to sex pheromone, but it is expected to be very similar to those of the other confums sibling species.…”

Section: Interspecific Mating In Naturementioning

confidence: 99%

BIOSYSTEMATICS OF NORTH AMERICANIPS(COLEOPTERA: SCOLYTIDAE): HOPPING’S GROUP IX

Lanier

1970

Can Entomol

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Can. Ent. 102: 1139Ent. 102: -1163Ent. 102: (1970 Controlled mating experiments demonstrating total reproductive isolation, together with consistent differences in morphological and cytological detail, confirmed the validity of the closely related group IX Ips: grandicollis, cribricollis, lecontei, montanus, confusus, paraconfusus, and hoppingi. The latter two species, new to science, were formerly considered to be confums.Matings between grandicollis from eastern Canada and North Carolina were subnormally fertile; other intraspecific matings between individuals of the same population or distant populations produced fully fertile progeny. Interspecific pairings usually resulted in insemination and normal-appearing egg galleries, but, with one exception, none of the eggs hatched.One montanus and two confusus, each mated by males of the same species, produced all-daughter broods. This "sex-ratio" condition appeared to be the result of a matrilineally transferred cytoplasmic factor lethal to male embryos only.A t first meiotic metaphase all species had the karyotypic formula l5AA + Xy,, and only grandicollis was easily differentiated by bivalent configuration or size sequence. Most other species showed diagnostic differences at meiotic prophase or second meiotic metaphase. Pairing disruptions and anaphase bridges occurred in grandicollis interpopulational hybrids; meiosis was normal in progeny from interpopulational pairings of confusus, paraconfusus, and mmntanus.In gra~zdicollis the median struts of the male genitalia were 1.5 times longer than the median lobe. The struts/lobe ratios for other species approximated 1.00 but differences for most comparisons between species were statistically significant. The shape of the pars stridens on females was different for most species and mean widths of striations thereon ranged from 0.517 p for paraconfusus to 0.876 p for lecontei. This character provided absolute discrimination of females of confusus from those of paraconfusus and hoppingi but the latter two species were most easily separated by differences in the density of punctures in the elytral declivity.It is hypothesized that contiguous allopatry and differences in host and ecological specialization, evidenced in species of group lX, is maintained by their high propensity for interspecific mating which fails completely to produce progeny.1Hopping (1965c), Schedl (1955), and Swaine (1909) list complete synonymy. SHopkins (1905, p. 77) misquoted Eichhoff (1868, p. 273) in referring to this species as "Tomicus cribripennis Eichh."herein considered to be a nomen nudum. 21. grandicollis (sensu Hopping) is the only group IX species in eastern North America. It has also been introduced into pine plantations in Australia (Hopping 196%; Morgan 1967). rpopulations from montane California; described as a new species herein.

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Stridulation and Behavior in Two Southeastern Ips Bark Beetles (Coleoptera: Scolytidae)

Cited by 44 publications

References 6 publications

Stridulation in the coconut rhinoceros beetleOryctes rhinoceros (Coleoptera: Scarabaeidae)

Stridulation in the coconut rhinoceros beetleOryctes rhinoceros (Coleoptera: Scarabaeidae)

Role of Ipsdienol, Ipsenol, and <I>cis</I>-Verbenol in Chemical Ecology of <I>Ips avulsus</I>, <I>Ips calligraphus</I>, and <I>Ips grandicollis</I> (Coleoptera: Curculionidae: Scolytinae)

BIOSYSTEMATICS OF NORTH AMERICANIPS(COLEOPTERA: SCOLYTIDAE): HOPPING’S GROUP IX

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