On being a Hydra with, and without, a nervous system: what do neurons add?
Anim Cogn. 2023 Aug 4. doi: 10.1007/s10071-023-01816-8. Online ahead of print.ABSTRACTThe small freshwater cnidarian Hydra has been the subject of scientific inquiry for over 300 years due to its remarkable regenerative capacities and apparent immortality. More recently, Hydra has been recognized as an excellent model system within neuroscience because of its small size, transparency, and simple nervous system, which allow high-resolution imaging of its entire nerve net while behaving. In less than a decade, studies of Hydra's nervous system have yielded insights into the activity of neural circuits in vivo unobtainable in...
Source: Animal Cognition - August 4, 2023 Category: Zoology Authors: Alison Hanson Source Type: research
On being a Hydra with, and without, a nervous system: what do neurons add?
Anim Cogn. 2023 Aug 4. doi: 10.1007/s10071-023-01816-8. Online ahead of print.ABSTRACTThe small freshwater cnidarian Hydra has been the subject of scientific inquiry for over 300 years due to its remarkable regenerative capacities and apparent immortality. More recently, Hydra has been recognized as an excellent model system within neuroscience because of its small size, transparency, and simple nervous system, which allow high-resolution imaging of its entire nerve net while behaving. In less than a decade, studies of Hydra's nervous system have yielded insights into the activity of neural circuits in vivo unobtainable in...
Source: Animal Cognition - August 4, 2023 Category: Zoology Authors: Alison Hanson Source Type: research
On being a Hydra with, and without, a nervous system: what do neurons add?
Anim Cogn. 2023 Aug 4. doi: 10.1007/s10071-023-01816-8. Online ahead of print.ABSTRACTThe small freshwater cnidarian Hydra has been the subject of scientific inquiry for over 300 years due to its remarkable regenerative capacities and apparent immortality. More recently, Hydra has been recognized as an excellent model system within neuroscience because of its small size, transparency, and simple nervous system, which allow high-resolution imaging of its entire nerve net while behaving. In less than a decade, studies of Hydra's nervous system have yielded insights into the activity of neural circuits in vivo unobtainable in...
Source: Animal Cognition - August 4, 2023 Category: Zoology Authors: Alison Hanson Source Type: research
Family first! Influence of parental investment in Guinea pigs (Cavia porcellus) prosocial choices
Anim Cogn. 2023 Aug 1. doi: 10.1007/s10071-023-01813-x. Online ahead of print.ABSTRACTLiterature often assumed that prosocial behaviours (behaviours that benefit others with or without a cost for the actor) would have evolved many species to improve the effectiveness of parental care (Decety and Cowell 2014). While this hypothesis is rarely questioned at a phylogenetic scale, it was never tested at an individual scale to the best of our knowledge. Therefore, we chose to study the impact of effective parental care on prosociality by comparing the prosocial tendencies of Guinea pigs before mating, during mating and after par...
Source: Animal Cognition - August 1, 2023 Category: Zoology Authors: Mathilde Lalot Aude Bourgeois Michel Saint Jalme Dalila Bovet Source Type: research
Family first! Influence of parental investment in Guinea pigs (Cavia porcellus) prosocial choices
Anim Cogn. 2023 Aug 1. doi: 10.1007/s10071-023-01813-x. Online ahead of print.ABSTRACTLiterature often assumed that prosocial behaviours (behaviours that benefit others with or without a cost for the actor) would have evolved many species to improve the effectiveness of parental care (Decety and Cowell 2014). While this hypothesis is rarely questioned at a phylogenetic scale, it was never tested at an individual scale to the best of our knowledge. Therefore, we chose to study the impact of effective parental care on prosociality by comparing the prosocial tendencies of Guinea pigs before mating, during mating and after par...
Source: Animal Cognition - August 1, 2023 Category: Zoology Authors: Mathilde Lalot Aude Bourgeois Michel Saint Jalme Dalila Bovet Source Type: research
Increasingly cautious sampling, not the black colouration of unpalatable prey, is used by fish in avoidance learning
Anim Cogn. 2023 Jul 28. doi: 10.1007/s10071-023-01815-9. Online ahead of print.ABSTRACTThe efficiency of aposematic colouration of prey is based on the innate bias or facilitation of avoidance learning of predators. In many toxic bufonids, larvae are uniformly black, which is considered a warning signal. We compared fish predation on normal (black) and 'transient albino' (greyish) common toad Bufo bufo tadpoles that did not differ in toxicity or activity. In a two-stage experiment, each fish was presented with tadpoles of one colour in the first trial and the other colour in a subsequent trial. While tadpoles sampled by fi...
Source: Animal Cognition - July 28, 2023 Category: Zoology Authors: Miko łaj Kaczmarski Jan M Kaczmarek Krzysztof Kowalski Karol Borowski Jacek K ęsy Janusz Kloskowski Source Type: research
Increasingly cautious sampling, not the black colouration of unpalatable prey, is used by fish in avoidance learning
Anim Cogn. 2023 Jul 28. doi: 10.1007/s10071-023-01815-9. Online ahead of print.ABSTRACTThe efficiency of aposematic colouration of prey is based on the innate bias or facilitation of avoidance learning of predators. In many toxic bufonids, larvae are uniformly black, which is considered a warning signal. We compared fish predation on normal (black) and 'transient albino' (greyish) common toad Bufo bufo tadpoles that did not differ in toxicity or activity. In a two-stage experiment, each fish was presented with tadpoles of one colour in the first trial and the other colour in a subsequent trial. While tadpoles sampled by fi...
Source: Animal Cognition - July 28, 2023 Category: Zoology Authors: Miko łaj Kaczmarski Jan M Kaczmarek Krzysztof Kowalski Karol Borowski Jacek K ęsy Janusz Kloskowski Source Type: research
Increasingly cautious sampling, not the black colouration of unpalatable prey, is used by fish in avoidance learning
Anim Cogn. 2023 Jul 28. doi: 10.1007/s10071-023-01815-9. Online ahead of print.ABSTRACTThe efficiency of aposematic colouration of prey is based on the innate bias or facilitation of avoidance learning of predators. In many toxic bufonids, larvae are uniformly black, which is considered a warning signal. We compared fish predation on normal (black) and 'transient albino' (greyish) common toad Bufo bufo tadpoles that did not differ in toxicity or activity. In a two-stage experiment, each fish was presented with tadpoles of one colour in the first trial and the other colour in a subsequent trial. While tadpoles sampled by fi...
Source: Animal Cognition - July 28, 2023 Category: Zoology Authors: Miko łaj Kaczmarski Jan M Kaczmarek Krzysztof Kowalski Karol Borowski Jacek K ęsy Janusz Kloskowski Source Type: research
Increasingly cautious sampling, not the black colouration of unpalatable prey, is used by fish in avoidance learning
Anim Cogn. 2023 Jul 28. doi: 10.1007/s10071-023-01815-9. Online ahead of print.ABSTRACTThe efficiency of aposematic colouration of prey is based on the innate bias or facilitation of avoidance learning of predators. In many toxic bufonids, larvae are uniformly black, which is considered a warning signal. We compared fish predation on normal (black) and 'transient albino' (greyish) common toad Bufo bufo tadpoles that did not differ in toxicity or activity. In a two-stage experiment, each fish was presented with tadpoles of one colour in the first trial and the other colour in a subsequent trial. While tadpoles sampled by fi...
Source: Animal Cognition - July 28, 2023 Category: Zoology Authors: Miko łaj Kaczmarski Jan M Kaczmarek Krzysztof Kowalski Karol Borowski Jacek K ęsy Janusz Kloskowski Source Type: research
Eggshell spots are an important cue for the egg retrieval behavior in two tit species
This study investigated the egg retrieval behavior of green-backed tits and Japanese tits by adding one experimental egg to the nest corner to explore whether eggshell spots also play a role in the process of egg retrieval. The results revealed significant differences in the retrieval rates of white-rumped munia (Lonchura striata) eggs painted with spots, Japanese tits' own true eggs, and unpainted, pure white-white-rumped munia eggs. The retrieval rate of white-white-rumped munia eggs was significantly lower than that of spotted white-rumped munia eggs and Japanese tits' own spotted eggs. For green-backed tits, the retrie...
Source: Animal Cognition - July 27, 2023 Category: Zoology Authors: Jianping Liu Laikun Ma Xiwen Yang Bin Li Xingyu Wang Wei Liang Source Type: research
Slowly walking down to the more food: relative quantity discrimination in African spurred tortoises (Centrochelys sulcata)
This study examined the effects of ratio and number size on relative quantity discrimination in African spurred tortoises (Centrochelys sulcata). To assess these effects, tortoises were presented with trays containing favored food pieces in all possible number combinations between 1 and 7. The tortoises had to approach the tray they perceived as having the larger quantity. If correct, they received one piece of food as reinforcement. The results revealed that relative quantity discrimination was influenced by the ratio between the numbers of pieces, with performance improving as the ratio between the numbers increased. Thi...
Source: Animal Cognition - July 21, 2023 Category: Zoology Authors: Masaki Tomonaga Daiki Haraguchi Anna Wilkinson Source Type: research
Reward history modulates visual attention in an avian model
Anim Cogn. 2023 Jul 21. doi: 10.1007/s10071-023-01811-z. Online ahead of print.ABSTRACTAttention can be biased towards previously reward-associated stimuli even when they are task-irrelevant and physically non-salient, although studies of reward-modulated attention have been largely limited to primate (including human and nonhuman) models. Birds have been shown to have the capacity to discriminate reward and spatial cues in a manner similar to primates, but whether reward history involuntarily affects their attention in the same way remains unclear. We adapted a spatial cueing paradigm with differential rewards to investig...
Source: Animal Cognition - July 21, 2023 Category: Zoology Authors: Ming-Ray Liao Mason H Dillard Jason L Hour Lilia A Barnett Jerry S Whitten Amariani C Valles J Jill Heatley Brian A Anderson Jessica L Yorzinski Source Type: research
Slowly walking down to the more food: relative quantity discrimination in African spurred tortoises (Centrochelys sulcata)
This study examined the effects of ratio and number size on relative quantity discrimination in African spurred tortoises (Centrochelys sulcata). To assess these effects, tortoises were presented with trays containing favored food pieces in all possible number combinations between 1 and 7. The tortoises had to approach the tray they perceived as having the larger quantity. If correct, they received one piece of food as reinforcement. The results revealed that relative quantity discrimination was influenced by the ratio between the numbers of pieces, with performance improving as the ratio between the numbers increased. Thi...
Source: Animal Cognition - July 21, 2023 Category: Zoology Authors: Masaki Tomonaga Daiki Haraguchi Anna Wilkinson Source Type: research
Reward history modulates visual attention in an avian model
Anim Cogn. 2023 Jul 21. doi: 10.1007/s10071-023-01811-z. Online ahead of print.ABSTRACTAttention can be biased towards previously reward-associated stimuli even when they are task-irrelevant and physically non-salient, although studies of reward-modulated attention have been largely limited to primate (including human and nonhuman) models. Birds have been shown to have the capacity to discriminate reward and spatial cues in a manner similar to primates, but whether reward history involuntarily affects their attention in the same way remains unclear. We adapted a spatial cueing paradigm with differential rewards to investig...
Source: Animal Cognition - July 21, 2023 Category: Zoology Authors: Ming-Ray Liao Mason H Dillard Jason L Hour Lilia A Barnett Jerry S Whitten Amariani C Valles J Jill Heatley Brian A Anderson Jessica L Yorzinski Source Type: research
Slowly walking down to the more food: relative quantity discrimination in African spurred tortoises (Centrochelys sulcata)
This study examined the effects of ratio and number size on relative quantity discrimination in African spurred tortoises (Centrochelys sulcata). To assess these effects, tortoises were presented with trays containing favored food pieces in all possible number combinations between 1 and 7. The tortoises had to approach the tray they perceived as having the larger quantity. If correct, they received one piece of food as reinforcement. The results revealed that relative quantity discrimination was influenced by the ratio between the numbers of pieces, with performance improving as the ratio between the numbers increased. Thi...
Source: Animal Cognition - July 21, 2023 Category: Zoology Authors: Masaki Tomonaga Daiki Haraguchi Anna Wilkinson Source Type: research
