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The divergence of mobility and activity associated with anti-predator adaptations in land snails

In: Behaviour
Authors:
Yuta Morii The Hakubi Center for Advanced Research, Kyoto University, Kyoto 6058501, Japan
Laboratory of Animal Ecology, Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 6068502, Japan

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https://orcid.org/0000-0002-4013-5861
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Ryota Kimura Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Rion Sato Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Nana Shiobara Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Honoka Maeda Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Kaede Nakagawa Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Ririka Ito Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Reiichi Ueki Hokkaido Sapporo Keisei High School, Sapporo, Hokkaido 0040004, Japan

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Abstract

The extreme divergence of phenotypes between two closely related terrestrial gastropods, Karaftohelix editha and K. gainesi (Camaenidae, Stylommatophora), has been suggested as a result of anti-predator adaptations because K. editha and K. gainesi showed shy and bold anti-predator behaviours, respectively. In this study, we measured the crawling speeds in the laboratory and the exploration (the crawled distances during every 6 h) and the activity (the active/inactive statuses) in the field for each species. As a result, K. gainesi crawled faster under ordinary conditions and moreover upregulated its crawling speed 1.21–1.28 times after the stimulus. The activity pattern of K. editha was typical of nocturnal species, but K. gainesi remained active even under daylight. These results might suggest that K. editha and K. gainesi were deemed as shy/inactive and bold/active species, respectively, and that behavioural syndromes existed between shyness–boldness and activity personalities.

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