TY - JOUR
T1 - Mutual wing-eating between female and male within mating pairs in wood-feeding cockroach
AU - Osaki, Haruka
AU - Kasuya, Eiiti
N1 - Funding Information:
We sincerely thank Dr. Atsushi Takashima, an assistant professor at the Yona Field of the experimental forest of the University of the Ryukyus for valuable advice on our field research, the staff at Yona Field for their support and assistance during our fieldwork, and Dr. Firouzeh Javadi for her advice on English expression. This work was in part supported by Grant‐in‐Aid for JSPS Research Fellow (JSPS KAKENHI Grant Number JP 19J20022).
Publisher Copyright:
© 2021 The Authors. Ethology published by Wiley-VCH GmbH.
PY - 2021/5
Y1 - 2021/5
N2 - The behavior of eating their mates or a part of their mate's body has been studied in sexual cannibalism or nuptial feeding. In these behaviors, only one sex eats the other unilaterally. Within mating pairs of a wood-feeding cockroach (Salganea taiwanensis), males and females eat the mate's wings each other, which is the first “mutual” case in these behaviors. Because the evolution of sexual cannibalism and nuptial feeding has been explained based on unilaterality, this mutual eating should have a new significance of reproduction. We described this behavior quantitatively and suggest a new hypothesis based on true monogamy, the mating system of S. taiwanensis, copulating with only one mate throughout life. Under true monogamy, the fitness of the mate is the same as own fitness and the pairs are free from sexual conflict. If the wing eating increases the ability of the mate to raise the offspring, this behavior is adaptive for the eater as well as its mate.
AB - The behavior of eating their mates or a part of their mate's body has been studied in sexual cannibalism or nuptial feeding. In these behaviors, only one sex eats the other unilaterally. Within mating pairs of a wood-feeding cockroach (Salganea taiwanensis), males and females eat the mate's wings each other, which is the first “mutual” case in these behaviors. Because the evolution of sexual cannibalism and nuptial feeding has been explained based on unilaterality, this mutual eating should have a new significance of reproduction. We described this behavior quantitatively and suggest a new hypothesis based on true monogamy, the mating system of S. taiwanensis, copulating with only one mate throughout life. Under true monogamy, the fitness of the mate is the same as own fitness and the pairs are free from sexual conflict. If the wing eating increases the ability of the mate to raise the offspring, this behavior is adaptive for the eater as well as its mate.
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U2 - 10.1111/eth.13133
DO - 10.1111/eth.13133
M3 - Article
AN - SCOPUS:85099766345
SN - 0179-1613
VL - 127
SP - 433
EP - 437
JO - Ethology
JF - Ethology
IS - 5
ER -