Associative learning in the box jellyfish Tripedalia cystophora
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Associative learning in the box jellyfish Tripedalia cystophora. / Bielecki, Jan; Dam Nielsen, Sofie Katrine; Nachman, Gösta; Garm, Anders.
I: Current Biology, Bind 33, Nr. 19, 2023, s. 4150-4159.e5.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Associative learning in the box jellyfish Tripedalia cystophora
AU - Bielecki, Jan
AU - Dam Nielsen, Sofie Katrine
AU - Nachman, Gösta
AU - Garm, Anders
N1 - Publisher Copyright: © 2023 Elsevier Inc.
PY - 2023
Y1 - 2023
N2 - Associative learning, such as classical or operant conditioning, has never been unequivocally associated with animals outside bilatarians, e.g., vertebrates, arthropods, or mollusks. Learning modulates behavior and is imperative for survival in the vast majority of animals. Obstacle avoidance is one of several visually guided behaviors in the box jellyfish, Tripedalia cystophora Conant, 1897 (Cnidaria: Cubozoa), and it is intimately associated with foraging between prop roots in their mangrove habitat. The obstacle avoidance behavior (OAB) is a species-specific defense reaction (SSDR) for T. cystophora, so identifying such SSDR is essential for testing the learning capacity of a given animal. Using the OAB, we show that box jellyfish performed associative learning (operant conditioning). We found that the rhopalial nervous system is the learning center and that T. cystophora combines visual and mechanical stimuli during operant conditioning. Since T. cystophora has a dispersed central nervous system lacking a conventional centralized brain, our work challenges the notion that associative learning requires complex neuronal circuitry. Moreover, since Cnidaria is the sister group to Bilateria, it suggests the intriguing possibility that advanced neuronal processes, like operant conditioning, are a fundamental property of all nervous systems.
AB - Associative learning, such as classical or operant conditioning, has never been unequivocally associated with animals outside bilatarians, e.g., vertebrates, arthropods, or mollusks. Learning modulates behavior and is imperative for survival in the vast majority of animals. Obstacle avoidance is one of several visually guided behaviors in the box jellyfish, Tripedalia cystophora Conant, 1897 (Cnidaria: Cubozoa), and it is intimately associated with foraging between prop roots in their mangrove habitat. The obstacle avoidance behavior (OAB) is a species-specific defense reaction (SSDR) for T. cystophora, so identifying such SSDR is essential for testing the learning capacity of a given animal. Using the OAB, we show that box jellyfish performed associative learning (operant conditioning). We found that the rhopalial nervous system is the learning center and that T. cystophora combines visual and mechanical stimuli during operant conditioning. Since T. cystophora has a dispersed central nervous system lacking a conventional centralized brain, our work challenges the notion that associative learning requires complex neuronal circuitry. Moreover, since Cnidaria is the sister group to Bilateria, it suggests the intriguing possibility that advanced neuronal processes, like operant conditioning, are a fundamental property of all nervous systems.
KW - cnidaria
KW - cubomedusa
KW - electrophysiology
KW - obstacle avoidance behavior
KW - operant conditioning
KW - rhopalial nervous system
U2 - 10.1016/j.cub.2023.08.056
DO - 10.1016/j.cub.2023.08.056
M3 - Journal article
C2 - 37741280
AN - SCOPUS:85172871300
VL - 33
SP - 4150-4159.e5
JO - Current Biology
JF - Current Biology
SN - 0960-9822
IS - 19
ER -
ID: 374569318