TY - JOUR
T1 - Lines selected for different durations of tonic immobility have different leg lengths in the red flour beetle Tribolium castaneum
AU - Matsumura, Kentarou
AU - Miyatake, Takahisa
N1 - Funding Information:
This work was supported by a grant from the Japan Society for the Promotion of Science KAKENHI 26291091 and 18H02510 to TM. Appendix Figure A1. Body length (a) and body width (b) of each population. Error bars show standard deviation. Numbers in parentheses indicate the sample size. Table A1. Results of post-hoc ANCOVA for MANOVA. Table A1. (Continued.) Table A2. Mean values ( μ m) with standard deviation (SD) of body length and body width.
Publisher Copyright:
© 2020 Copyright 2020 by Koninklijke Brill NV, Leiden, The Netherlands.
PY - 2020
Y1 - 2020
N2 - Tonic immobility is an adaptive anti-predator behaviour observed in many species. This anti-predator behaviour is often correlated with a species' movement motivation, so a relationship between the duration of tonic immobility and morphological traits supporting movement would be expected. Using the red flour beetle, Tribolium castaneum, we carried out two-way artificial selection for the duration of tonic immobility over more than 43 generations, establishing populations with longer (L) and shorter (S) tonic immobility durations compared to those of a non-selected control (C) population. Here, we investigated differences in walking motivation and leg length between the selected populations. Walking motivation was significantly higher in beetles from the S population than that in those from the L population. Moreover, S-population beetles of both sexes had significantly longer legs than those from L and C populations. The present results suggest the evolution of longer legs in response to selection pressure for a shorter duration of tonic immobility in T. castaneum. Keywords
AB - Tonic immobility is an adaptive anti-predator behaviour observed in many species. This anti-predator behaviour is often correlated with a species' movement motivation, so a relationship between the duration of tonic immobility and morphological traits supporting movement would be expected. Using the red flour beetle, Tribolium castaneum, we carried out two-way artificial selection for the duration of tonic immobility over more than 43 generations, establishing populations with longer (L) and shorter (S) tonic immobility durations compared to those of a non-selected control (C) population. Here, we investigated differences in walking motivation and leg length between the selected populations. Walking motivation was significantly higher in beetles from the S population than that in those from the L population. Moreover, S-population beetles of both sexes had significantly longer legs than those from L and C populations. The present results suggest the evolution of longer legs in response to selection pressure for a shorter duration of tonic immobility in T. castaneum. Keywords
KW - Tribolium castaneum
KW - anti-predator strategy
KW - artificial selection
KW - leg
KW - tonic immobility
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U2 - 10.1163/1568539X-00003579
DO - 10.1163/1568539X-00003579
M3 - Article
AN - SCOPUS:85077571508
SN - 0005-7959
VL - 157
SP - 17
EP - 31
JO - Behaviour
JF - Behaviour
IS - 1
ER -