@article {58355, title = {Squeaking caterpillars: independent evolution of sonic defense in wild silkmoths}, year = {2020}, doi = {10.1002/ecy.3112}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/ecy.3112}, author = {Sugiura, Shinji and Takanashi, Takuma and Kojima, Wataru and Kajiura, Zenta} } @article {57342, title = {Substrate vibrations mediate behavioral responses via femoral chordotonal organs in a cerambycid beetle}, journal = {Zoological Letters}, volume = {2}, year = {2016}, month = {Jan-12-2016}, abstract = {

Background
Vibrational senses are vital for plant-dwelling animals because vibrations transmitted through plants allow them to detect approaching predators or conspecifics. Little is known, however, about how coleopteran insects detect vibrations.

Results
We investigated vibrational responses of the Japanese pine sawyer beetle, Monochamus alternatus, and its putative sense organs. This beetle showed startle responses, stridulation, freezing, and walking in response to vibrations below 1 kHz, indicating that they are able to detect low-frequency vibrations. For the first time in a coleopteran species, we have identified the sense organ involved in the freezing behavior. The femoral chordotonal organ (FCO), located in the mid-femur, contained 60\–70 sensory neurons and was distally attached to the proximal tibia via a cuticular apodeme. Beetles with operated FCOs did not freeze in response to low-frequency vibrations during walking, whereas intact beetles did. These results indicate that the FCO is responsible for detecting low-frequency vibrations and mediating the behavioral responses. We discuss the behavioral significance of vibrational responses and physiological functions of FCOs in M. alternatus.

Conclusions
Our findings revealed that substrate vibrations mediate behavioral responses via femoral chordotonal organs in M. alternatus.

}, keywords = {Behavior, Coleoptera, Sense organ, vibration}, doi = {10.1186/s40851-016-0053-4}, url = {http://zoologicalletters.biomedcentral.com/articles/10.1186/s40851-016-0053-4}, author = {Takanashi, Takuma and Fukaya, Midori and Nakamuta, Kiyoshi and Skals, Niels and Nishino, Hiroshi} } @article {53519, title = {Vibrations in hemipteran and coleopteran insects: behaviors and application in pest management}, journal = {Applied Entomology and Zoology}, year = {2019}, month = {Nov-01-2019}, abstract = {

Many groups of insects utilize substrate-borne vibrations for communication. They display various behaviors in response to vibrations in sexual and social communication and in predator\–prey interactions. Although the number of reports on com- munication and behaviors using vibrations has continued to increase across various insect orders, there are several studies of the exploitation of vibrations for pest management in Hemiptera and Coleoptera. Here, we review the studies of behaviors and communication using vibrations in hemipteran and coleopteran insects. For instance, pentatomid bugs display species- and sex-specific vibrational signals during courtship, whereas cerambycid beetles show startle responses to vibrations in the context of predator\–prey interactions. Concepts and case studies in pest management using vibrations\—especially regarding the disruption of communication and behavior\—are also presented.

}, keywords = {Behavioral disruption, communication, Pest control, Sense organ, vibrational signals}, issn = {0003-6862}, doi = {10.1007/s13355-018-00603-z}, url = {http://link.springer.com/10.1007/s13355-018-00603-z}, author = {Takanashi, Takuma and Uechi, Nami and Tatsuta, Haruki} } @article {53452, title = {Egg-Cracking Vibration as a Cue for Stink Bug Siblings to Synchronize Hatching}, journal = {Current Biology}, volume = {29}, year = {2019}, month = {Jan-01-2019}, pages = {143 - 148.e2}, abstract = {

Egg clutches of many animals hatch synchronously due to parental control [1, 2] or environmental stimu- lation [3, 4]. In contrast, in some animals, embryos actively synchronize their hatching timing with their siblings to facilitate adaptive behavior in sibling groups, such as mass migration [5, 6]. These em- bryos require synchronization cues that are detect- able from eggs and indicative of when the siblings hatch, such as pre-hatching vocalizations in birds and crocodiles [7, 8]. Previous studies, using methods including artificial presentation of non-spe- cific mechanical stimuli, demonstrated that vibra- tions or other mechanical forces caused by sibling movements are cues used by some turtles and in- sects [9\–13]. However, there is no evidence about which movements of tiny embryos or hatchlings, among multiple possibilities, can generate mechani- cal cues actually detectable through eggs. Here, we show that embryos of the brown marmorated stink bug, Halyomorpha halys, synchronize hatching by responding to single pulsed vibrations generated when siblings crack open their eggshells. An egg- cracking vibration seems to be transmitted to distant eggs within a clutch while still maintaining its func- tion as a cue, thus leading to the highly synchronized hatching pattern previously reported [14]. In this spe- cies, it is possible that embryos attempt to hatch with short lags after earlier-hatched siblings to avoid egg cannibalism by them [14]. The present study illus- trates the diversity of social-information use by ani- mal embryos for success in the sibling group.

}, issn = {09609822}, doi = {10.1016/j.cub.2018.11.024}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0960982218314908https://api.elsevier.com/content/article/PII:S0960982218314908?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0960982218314908?httpAccept=text/plain}, author = {Endo, Jun and Takanashi, Takuma and Mukai, Hiromi and Numata, Hideharu} } @article {52672, title = {Hornworm counterattacks: defensive strikes and sound production in response to invertebrate attackers}, journal = {Biological Journal of the Linnean Society}, volume = {123}, year = {2018}, month = {May-18-2018}, pages = {496 - 505}, abstract = {

Caterpillars (i.e. lepidopteran larvae) have evolved multiple defences against predators, with some large caterpillars showing aggressive defences (e.g. strikes and/or sound production). Although such behaviours can startle or warn vertebrate predators, defences against invertebrates remain unclear. We investigated the behavioural responses of the hornworm Langia zenzeroides (Lepidoptera: Sphingidae) against the invertebrate attacker Calosoma maximowiczi (Coleoptera: Carabidae). Fifth (last) instars of L. zenzeroides exhibited a striking response, in which the larva rapidly bent its head and thorax towards the body part stimulated by C. maximowiczi attacks. Strikes were also accompanied by opening of the mandibles, followed by sound production or regurgitation. In some cases, L. zenzeroides larvae caught the legs of C. maximowiczi and threw the beetles using their mandibles. Such counterattacks completely defended against attackers. The sounds that L. zenzeroides generated (pulse durations, 82\–314 ms; dominant frequencies, 5.0\–8.7 kHz; sound pressure level, 44.0\–56.9 dB SPL) were produced by forcing air through the eighth pair of abdominal spiracles. Our results indicate that hornworm larvae are able to deter predacious invertebrates using multiple defences.

}, issn = {0024-4066}, doi = {10.1093/biolinnean/blx156}, url = {https://academic.oup.com/biolinnean/article/123/3/496/4850692}, author = {Sugiura, Shinji and Takanashi, Takuma} }