Successful escape of bombardier beetles from predator digestive systems

Sugiura, Shinji; Sato, Tadanobu

doi:10.1098/rsbl.2017.0647

Cited by 24 publications

(49 citation statements)

References 15 publications

(24 reference statements)

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“…In secondary defence, some animals emit sounds, such as caterpillars (Bura et al 2011) and cods (Vester et al 2004), or chemicals, such as ostracods and shrimp (fluorescent ink) (Haddock et al 2010) and bombardier beetles (hot chemicals) (Sugiura and Sato 2018), in response to a predator's attack. However, there is no evidence of a coupled behavioural component to reinforce their defence ability.…”

Section: Discussionmentioning

confidence: 99%

An elaborate behavioural sequence reinforces the decoy effect of ink during predatory attacks on squid

Hikidi

Hirohashi

Kasugai³

et al. 2020

J Ethol

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The characteristic inking behaviour of cephalopods is a secondary defence mechanism that helps them to escape predation. However, although it has been postulated that ink creates a decoy by disrupting the visual information received by the predator, the underlying mechanisms by which ink helps squid to escape from predators remain unknown. Therefore, we observed the inking behaviour of the Japanese pygmy squid (Idiosepius paradoxus). Field observations showed the squid intermittently and linearly ejected ink while rapidly swimming backwards in response to a predator and also changed their bodies to a light colour. This behaviour was then followed by a sudden and sharp change in swimming direction or sometimes a sudden break from swimming with a concurrent change in body colour to black. We also recorded the escape behaviour with inking under captive conditions in response to predatory sculpins, which allowed the successful escape from a predatory attack. Furthermore, the greater the number of ink ejections, the higher the probability that the sculpins would initiate a predatory attack on the ink rather than the squid. Together, these results suggest that squid inking behaviour exhibits a substantial decoy effect on predators and is associated with a series of complex, spatio-temporally regulated behaviours. Digital video images related to the article are available at http://www.momo-p.com/showd etail-e.php?movie id=momo2 00107 ip01a , http://www.momo-p.com/showd etail-e.php?movie id=momo2 00107 ip03a , and http://www.momo-p.com/showd etail-e.php?movie id=momo2 00107 ip04a .

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Section: Discussionmentioning

confidence: 99%

An elaborate behavioural sequence reinforces the decoy effect of ink during predatory attacks on squid

Hikidi

Hirohashi

Kasugai³

et al. 2020

J Ethol

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show abstract

“…These defensive chemicals frequently prevent insects from being swallowed by predators, as the toxins cause the predators to spit out or vomit the insects (e.g. Dean 1980;Sugiura 2018;Sugiura & Sato 2018). Therefore, most chemical defenses are secondary defenses.…”

Section: Chemical Defensesmentioning

confidence: 99%

“…Frogs and toads tend to reject chemically defended and spiny insects (e.g. Dean 1980;Ito et al 2016;Sugiura 2018;Sugiura & Sato 2018). For example, the grasshopper Criotettix japonicus (Haan) is well-defended against the pond frog Pelophylax nigromaculatus (Hallowell) due to its specific defensive morphology and behavior (Honma et al 2006).…”

Section: Amphibiansmentioning

confidence: 99%

“…Furthermore, antipredator defenses can vary intraspecifically. For example, the amount of defensive chemicals produced and armor sizes can vary among individuals of the same species (Sugiura & Yamazaki 2014;Sugiura 2016;Sugiura & Sato 2018). The effectiveness of antipredator defenses can vary among regions wherein the strength of prey-predator interactions can change.…”

Section: Multiple Predator Species and Sufficient Replicationmentioning

confidence: 99%

“…Results from studies that have used many predator replicates indicate that intraspecific variation in predators (e.g. variation in body size) affect whether prey defenses are successful (Sugiura & Yamazaki 2014;Sugiura & Sato 2018). However, only a few predator individuals are used in most studies.…”

Section: Multiple Predator Species and Sufficient Replicationmentioning

confidence: 99%

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Predators as drivers of insect defenses

Sugiura

2020

Entomological Science

Self Cite

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Insects have evolved various types of antipredator defenses. For example, many insects have evolved crypsis, and exhibit cryptic body colors and shapes for hiding from predators. Other insects produce toxins as a form of chemical defense against predators, and some toxic insects are aposematic, with conspicuous body colors for advertising their toxins. Insects can also develop hairs, spines or hard exoskeletons as morphological defenses to protect themselves from predation. In addition, insects can evolve behavioral defenses, in which insects exhibit autotomy or dropping, or feign death. This study investigated which predator types evoke these types of defenses, through a review of the effectiveness of antipredator defenses in insects against carnivorous animals that are commonly used as model predators in studies. These predators include other insects, spiders, fish, frogs, lizards, birds and mammals. The results provide the first step for clarifying the evolutionary drivers of antipredator defenses in insects. The following aspects should be considered for future studies: multiple predator species and sufficient replication, alternative prey and predator models, and tolerance to predators in insects.

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Design and Control of Bioinspired Millibots

Reghu

You

Seenivasan

et al. 2020

Advanced Intelligent Systems

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In the last decade, there has been great progress in the field of smart materials and technologies for the development of bio‐inspired artificial insects. An insect‐mimetic functional nanocomposite, namely, millimeter‐sized robot (millibot), based on magnetite, zeolitic imidazolate framework‐8, and polytetrafluoroethylene is successfully prepared. The millibots are designed through a rational chemical design for controlling its multi‐functions by external light and magnetic field, which act as fuels. The millibots can be effectively loaded with CO2 gas and remotely controlled by photothermal energy for the release of CO2 molecules from the laser‐induced millibots to anesthetize fruit flies as a potential foreign enemy. A remote regulation of the photo‐ and magnetic field‐induced millibot dynamic locomotion is demonstrated. As a proof of principle, millibots equipped with a gelatin particle encapsulating rhodamine B are efficaciously used in the bio‐inspired spawning of an artificial insect. The materials and strategies could inspire new designs for the development of high‐performance biologically active insect‐type robots in the future.

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Successful escape of bombardier beetles from predator digestive systems

Cited by 24 publications

References 15 publications

An elaborate behavioural sequence reinforces the decoy effect of ink during predatory attacks on squid

An elaborate behavioural sequence reinforces the decoy effect of ink during predatory attacks on squid

Predators as drivers of insect defenses

Design and Control of Bioinspired Millibots

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