Fish yawn: the state-change hypothesis in juvenile white-spotted char Salvelinus leucomaenis Hiroyuki YamadaSatoshi Wada Article Open access 10 January 2023 Pages: 111 - 117
Fight outcome influences male mating success in Drosophila prolongata Naoki ToyoshimaTakashi Matsuo Article Open access 09 February 2023 Pages: 119 - 127
Cost of defensive spraying by larval Osmylus hyalinatus (Neuroptera: Osmylidae) for post-larval development Pei YuTsukuru IwanamiFumio Hayashi Article 06 February 2023 Pages: 129 - 139
Group definition for underwater observation of wild Indo-Pacific bottlenose dolphins Tadamichi MorisakaTomo FuruichiMotoi Yoshioka Article 01 March 2023 Pages: 141 - 151
Large-scale spatial pattern of bird responses to a potential predator suggests that predator-specific mobbing is a plastic trait Benjamín Jarčuška Article 16 March 2023 Pages: 153 - 162
Sexual horn dimorphism predicts the expression of active personality trait: males perform better only in the sexually horn dimorphic Onthophagus dung beetle Kaan KermanAngela RoggeroClaudia Palestrini Article 20 March 2023 Pages: 163 - 176
Mite dilemma: molting to acquire sexual maturity or not molting to ensure durability and dispersal ability in Phorytocarpais fimetorum (Parasitiformes; Gamasida; Parasitidae) Yukio Yasui Article Open access 30 March 2023 Pages: 177 - 184
Bigger male Eurasian nuthatches (Sitta europaea) behave more aggressively in playback-simulated territorial intrusion Mikhail DiatroptovAlexey Opaev Article 30 March 2023 Pages: 185 - 193
Chemical compounds of a Neotropical plant constrain the anti-predator behaviour of sympatric tadpoles Carolina C. GanciHenrique T. dos SantosZaida Ortega Article 29 March 2023 Pages: 195 - 200
Black-headed gulls are more wary of people dressed in red: a test of the concealment color hypothesis Xingyi JiangWei LiangYanyun Zhang Article 30 March 2023 Pages: 201 - 206
