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Personality affects defensive behaviour of Porcellioscaber (Isopoda, Oniscidea).

Tuf IH, Drábková L, Šipoš J - Zookeys (2015)

Bottom Line: Within each set of the three treatment, the strongest response was the third one, regardless of treatment type.Duration of reaction was affected by the size of the woodlouse, the smallest individuals feigning death for the shortest time.Despite body size, we found a significant individual pattern of endurance of TI among tested woodlice, which was stable across treatments as well as across time (5 repetitions during a 3 week period).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Ecology and Environmental Sciences, Faculty of Science, Palacky University, Slechtitelu 27, CZ-77900 Olomouc, Czech Republic.

ABSTRACT
We evaluated individual behavioural patterns of isopods expressed as tonic immobility following some intrusive treatments. Common rough woodlice, Porcellioscaber, were kept individually in plastic boxes and tested for tonic immobility repeatedly. Reactivity, sensitivity (number of stimuli needed to respond), and endurance of tonic immobility (TI) according three types of treatments (touch, squeeze, drop) were evaluated. Touch was the weakest treatment and it was necessary to repeat it a number of times to obtain a response; while squeeze and drop induced TI more frequently. Nevertheless, duration of the response persisted for a longer time with the touch treatment. Within each set of the three treatment, the strongest response was the third one, regardless of treatment type. Duration of reaction was affected by the size of the woodlouse, the smallest individuals feigning death for the shortest time. Despite body size, we found a significant individual pattern of endurance of TI among tested woodlice, which was stable across treatments as well as across time (5 repetitions during a 3 week period). Porcellioscaber is one of the first species of terrestrial isopods with documented personality traits.

No MeSH data available.


Related in: MedlinePlus

Tonic immobility of Porcellioscaber induced by different treatments: a probability of inducing TI by the first, the second and the third treatment b probability of inducing TI by different treatments c endurance of TI following the first, the second and the third treatment d endurance of TI following different treatments e sensitivity, i.e. promptness of inducing TI by the first, the second and the third treatment f sensitivity, i.e. promptness of inducing TI by different treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)
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Figure 2: Tonic immobility of Porcellioscaber induced by different treatments: a probability of inducing TI by the first, the second and the third treatment b probability of inducing TI by different treatments c endurance of TI following the first, the second and the third treatment d endurance of TI following different treatments e sensitivity, i.e. promptness of inducing TI by the first, the second and the third treatment f sensitivity, i.e. promptness of inducing TI by different treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)

Mentions: If a woodlouse reacted to a treatment in an experimental set, the probability of reaction was influenced by type of treatment (F2,298 = 1165.00, p < 0.001, Fig. 2b); in those experimental sets isopods reacted to drop and squeeze in all cases, but to touch in ca 20% only. If isopods reacted to treatment by TI, duration of TI significantly depended on the type of treatment (F2,298 = 2.97, p = 0.052, Fig. 2d), too: with touch followed by the longest TI. Also reactivity, i.e. number of stimuli needed to induce TI, was significantly dependent upon the type of treatment (F2,298 = 517.00, p < 0.001, Fig. 2f); if the global probability to react to touch is the lowest, more stimuli of touch were necessary to induce TI.


Personality affects defensive behaviour of Porcellioscaber (Isopoda, Oniscidea).

Tuf IH, Drábková L, Šipoš J - Zookeys (2015)

Tonic immobility of Porcellioscaber induced by different treatments: a probability of inducing TI by the first, the second and the third treatment b probability of inducing TI by different treatments c endurance of TI following the first, the second and the third treatment d endurance of TI following different treatments e sensitivity, i.e. promptness of inducing TI by the first, the second and the third treatment f sensitivity, i.e. promptness of inducing TI by different treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4525042&req=5

Figure 2: Tonic immobility of Porcellioscaber induced by different treatments: a probability of inducing TI by the first, the second and the third treatment b probability of inducing TI by different treatments c endurance of TI following the first, the second and the third treatment d endurance of TI following different treatments e sensitivity, i.e. promptness of inducing TI by the first, the second and the third treatment f sensitivity, i.e. promptness of inducing TI by different treatments. (*** p < 0.001; ** p < 0.01; * p ≤ 0.05)
Mentions: If a woodlouse reacted to a treatment in an experimental set, the probability of reaction was influenced by type of treatment (F2,298 = 1165.00, p < 0.001, Fig. 2b); in those experimental sets isopods reacted to drop and squeeze in all cases, but to touch in ca 20% only. If isopods reacted to treatment by TI, duration of TI significantly depended on the type of treatment (F2,298 = 2.97, p = 0.052, Fig. 2d), too: with touch followed by the longest TI. Also reactivity, i.e. number of stimuli needed to induce TI, was significantly dependent upon the type of treatment (F2,298 = 517.00, p < 0.001, Fig. 2f); if the global probability to react to touch is the lowest, more stimuli of touch were necessary to induce TI.

Bottom Line: Within each set of the three treatment, the strongest response was the third one, regardless of treatment type.Duration of reaction was affected by the size of the woodlouse, the smallest individuals feigning death for the shortest time.Despite body size, we found a significant individual pattern of endurance of TI among tested woodlice, which was stable across treatments as well as across time (5 repetitions during a 3 week period).

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Ecology and Environmental Sciences, Faculty of Science, Palacky University, Slechtitelu 27, CZ-77900 Olomouc, Czech Republic.

ABSTRACT
We evaluated individual behavioural patterns of isopods expressed as tonic immobility following some intrusive treatments. Common rough woodlice, Porcellioscaber, were kept individually in plastic boxes and tested for tonic immobility repeatedly. Reactivity, sensitivity (number of stimuli needed to respond), and endurance of tonic immobility (TI) according three types of treatments (touch, squeeze, drop) were evaluated. Touch was the weakest treatment and it was necessary to repeat it a number of times to obtain a response; while squeeze and drop induced TI more frequently. Nevertheless, duration of the response persisted for a longer time with the touch treatment. Within each set of the three treatment, the strongest response was the third one, regardless of treatment type. Duration of reaction was affected by the size of the woodlouse, the smallest individuals feigning death for the shortest time. Despite body size, we found a significant individual pattern of endurance of TI among tested woodlice, which was stable across treatments as well as across time (5 repetitions during a 3 week period). Porcellioscaber is one of the first species of terrestrial isopods with documented personality traits.

No MeSH data available.


Related in: MedlinePlus