First acoustic evidence of signature whistle production by spinner dolphins (Stenella longirostris)
Anim Cogn. 2023 Sep 7. doi: 10.1007/s10071-023-01824-8. Online ahead of print.ABSTRACTA dolphin's signature whistle (SW) is a distinctive acoustic signal, issued in a bout pattern of unique frequency modulation contours; it allows individuals belonging to a given group to recognize each other and, consequently, to maintain contact and cohesion. The current study is the first scientific evidence that spinner dolphins (Stenella longirostris) produce SWs. Acoustic data were recorded at a shallow rest bay called "Biboca", in Fernando de Noronha Archipelago, Brazil. In total, 1902 whistles were analyzed; 40% (753/1,902) of them...
Source: Animal Cognition - September 7, 2023 Category: Zoology Authors: Raul Rio Source Type: research
First acoustic evidence of signature whistle production by spinner dolphins (Stenella longirostris)
Anim Cogn. 2023 Sep 7. doi: 10.1007/s10071-023-01824-8. Online ahead of print.ABSTRACTA dolphin's signature whistle (SW) is a distinctive acoustic signal, issued in a bout pattern of unique frequency modulation contours; it allows individuals belonging to a given group to recognize each other and, consequently, to maintain contact and cohesion. The current study is the first scientific evidence that spinner dolphins (Stenella longirostris) produce SWs. Acoustic data were recorded at a shallow rest bay called "Biboca", in Fernando de Noronha Archipelago, Brazil. In total, 1902 whistles were analyzed; 40% (753/1,902) of them...
Source: Animal Cognition - September 7, 2023 Category: Zoology Authors: Raul Rio Source Type: research
Grouping rule in tadpole: is quantity more or size assortment more important?
In this study, I examined the responses of Miyako toad (Bufo gargarizans miyakonis) tadpoles to number quantity and size discrimination by choice tests at different ontogenetic stages (small, medium, and large). The results revealed that small-sized tadpoles in early developmental stages significantly preferred larger numbers (4) compared to smaller ones (1). However, this preference was not observed in later developmental stages (medium and large). And interestingly, when there was no quantity bias, size discrimination was not observed in tadpoles, irrespective of their ontogeny. These findings suggest that Miyako toad ta...
Source: Animal Cognition - September 5, 2023 Category: Zoology Authors: Kazuko Hase Source Type: research
Grouping rule in tadpole: is quantity more or size assortment more important?
In this study, I examined the responses of Miyako toad (Bufo gargarizans miyakonis) tadpoles to number quantity and size discrimination by choice tests at different ontogenetic stages (small, medium, and large). The results revealed that small-sized tadpoles in early developmental stages significantly preferred larger numbers (4) compared to smaller ones (1). However, this preference was not observed in later developmental stages (medium and large). And interestingly, when there was no quantity bias, size discrimination was not observed in tadpoles, irrespective of their ontogeny. These findings suggest that Miyako toad ta...
Source: Animal Cognition - September 5, 2023 Category: Zoology Authors: Kazuko Hase Source Type: research
Active oscillations in microscale navigation
Anim Cogn. 2023 Sep 4. doi: 10.1007/s10071-023-01819-5. Online ahead of print.ABSTRACTLiving organisms routinely navigate their surroundings in search of better conditions, more food, or to avoid predators. Typically, animals do so by integrating sensory cues from the environment with their locomotor apparatuses. For single cells or small organisms that possess motility, fundamental physical constraints imposed by their small size have led to alternative navigation strategies that are specific to the microscopic world. Intriguingly, underlying these myriad exploratory behaviours or sensory functions is the onset of periodi...
Source: Animal Cognition - September 4, 2023 Category: Zoology Authors: Kirsty Y Wan Source Type: research
Active oscillations in microscale navigation
Anim Cogn. 2023 Sep 4. doi: 10.1007/s10071-023-01819-5. Online ahead of print.ABSTRACTLiving organisms routinely navigate their surroundings in search of better conditions, more food, or to avoid predators. Typically, animals do so by integrating sensory cues from the environment with their locomotor apparatuses. For single cells or small organisms that possess motility, fundamental physical constraints imposed by their small size have led to alternative navigation strategies that are specific to the microscopic world. Intriguingly, underlying these myriad exploratory behaviours or sensory functions is the onset of periodi...
Source: Animal Cognition - September 4, 2023 Category: Zoology Authors: Kirsty Y Wan Source Type: research
Photobehaviours guided by simple photoreceptor systems
Anim Cogn. 2023 Aug 31. doi: 10.1007/s10071-023-01818-6. Online ahead of print.ABSTRACTLight provides a widely abundant energy source and valuable sensory cue in nature. Most animals exposed to light have photoreceptor cells and in addition to eyes, there are many extraocular strategies for light sensing. Here, we review how these simpler forms of detecting light can mediate rapid behavioural responses in animals. Examples of these behaviours include photophobic (light avoidance) or scotophobic (shadow) responses, photokinesis, phototaxis and wavelength discrimination. We review the cells and response mechanisms in these f...
Source: Animal Cognition - August 31, 2023 Category: Zoology Authors: Emelie Brodrick G áspár Jékely Source Type: research
Photobehaviours guided by simple photoreceptor systems
Anim Cogn. 2023 Aug 31. doi: 10.1007/s10071-023-01818-6. Online ahead of print.ABSTRACTLight provides a widely abundant energy source and valuable sensory cue in nature. Most animals exposed to light have photoreceptor cells and in addition to eyes, there are many extraocular strategies for light sensing. Here, we review how these simpler forms of detecting light can mediate rapid behavioural responses in animals. Examples of these behaviours include photophobic (light avoidance) or scotophobic (shadow) responses, photokinesis, phototaxis and wavelength discrimination. We review the cells and response mechanisms in these f...
Source: Animal Cognition - August 31, 2023 Category: Zoology Authors: Emelie Brodrick G áspár Jékely Source Type: research
Photobehaviours guided by simple photoreceptor systems
Anim Cogn. 2023 Aug 31. doi: 10.1007/s10071-023-01818-6. Online ahead of print.ABSTRACTLight provides a widely abundant energy source and valuable sensory cue in nature. Most animals exposed to light have photoreceptor cells and in addition to eyes, there are many extraocular strategies for light sensing. Here, we review how these simpler forms of detecting light can mediate rapid behavioural responses in animals. Examples of these behaviours include photophobic (light avoidance) or scotophobic (shadow) responses, photokinesis, phototaxis and wavelength discrimination. We review the cells and response mechanisms in these f...
Source: Animal Cognition - August 31, 2023 Category: Zoology Authors: Emelie Brodrick G áspár Jékely Source Type: research
Photobehaviours guided by simple photoreceptor systems
Anim Cogn. 2023 Aug 31. doi: 10.1007/s10071-023-01818-6. Online ahead of print.ABSTRACTLight provides a widely abundant energy source and valuable sensory cue in nature. Most animals exposed to light have photoreceptor cells and in addition to eyes, there are many extraocular strategies for light sensing. Here, we review how these simpler forms of detecting light can mediate rapid behavioural responses in animals. Examples of these behaviours include photophobic (light avoidance) or scotophobic (shadow) responses, photokinesis, phototaxis and wavelength discrimination. We review the cells and response mechanisms in these f...
Source: Animal Cognition - August 31, 2023 Category: Zoology Authors: Emelie Brodrick G áspár Jékely Source Type: research
Effects of acute maternal stress induced by predator cues on spatial learning and memory of offspring in the subterranean rodent Ctenomys talarum
Anim Cogn. 2023 Aug 26. doi: 10.1007/s10071-023-01822-w. Online ahead of print.ABSTRACTOne of the main selection pressures to which animals are exposed in nature is predation, which affects a wide variety of biological traits. When the mother experiences this stressor during pregnancy and/or lactation, behavioral and physiological responses may be triggered in the offspring as well. Thus, in order to broaden and deepen knowledge on the transgenerational effects of predation stress, we evaluated how maternal stress experienced during pregnancy and/or lactation affects the spatial abilities of progeny at the onset of adultho...
Source: Animal Cognition - August 26, 2023 Category: Zoology Authors: J Iribarne V Brachetta M Kittlein C Schleich R Zenuto Source Type: research
Effects of acute maternal stress induced by predator cues on spatial learning and memory of offspring in the subterranean rodent Ctenomys talarum
Anim Cogn. 2023 Aug 26. doi: 10.1007/s10071-023-01822-w. Online ahead of print.ABSTRACTOne of the main selection pressures to which animals are exposed in nature is predation, which affects a wide variety of biological traits. When the mother experiences this stressor during pregnancy and/or lactation, behavioral and physiological responses may be triggered in the offspring as well. Thus, in order to broaden and deepen knowledge on the transgenerational effects of predation stress, we evaluated how maternal stress experienced during pregnancy and/or lactation affects the spatial abilities of progeny at the onset of adultho...
Source: Animal Cognition - August 26, 2023 Category: Zoology Authors: J Iribarne V Brachetta M Kittlein C Schleich R Zenuto Source Type: research
Effects of acute maternal stress induced by predator cues on spatial learning and memory of offspring in the subterranean rodent Ctenomys talarum
Anim Cogn. 2023 Aug 26. doi: 10.1007/s10071-023-01822-w. Online ahead of print.ABSTRACTOne of the main selection pressures to which animals are exposed in nature is predation, which affects a wide variety of biological traits. When the mother experiences this stressor during pregnancy and/or lactation, behavioral and physiological responses may be triggered in the offspring as well. Thus, in order to broaden and deepen knowledge on the transgenerational effects of predation stress, we evaluated how maternal stress experienced during pregnancy and/or lactation affects the spatial abilities of progeny at the onset of adultho...
Source: Animal Cognition - August 26, 2023 Category: Zoology Authors: J Iribarne V Brachetta M Kittlein C Schleich R Zenuto Source Type: research
Effects of acute maternal stress induced by predator cues on spatial learning and memory of offspring in the subterranean rodent Ctenomys talarum
Anim Cogn. 2023 Aug 26. doi: 10.1007/s10071-023-01822-w. Online ahead of print.ABSTRACTOne of the main selection pressures to which animals are exposed in nature is predation, which affects a wide variety of biological traits. When the mother experiences this stressor during pregnancy and/or lactation, behavioral and physiological responses may be triggered in the offspring as well. Thus, in order to broaden and deepen knowledge on the transgenerational effects of predation stress, we evaluated how maternal stress experienced during pregnancy and/or lactation affects the spatial abilities of progeny at the onset of adultho...
Source: Animal Cognition - August 26, 2023 Category: Zoology Authors: J Iribarne V Brachetta M Kittlein C Schleich R Zenuto Source Type: research
In paired preference tests, domestic chicks innately choose the colour green over red, and the shape of a frog over a sphere when both stimuli are green
Anim Cogn. 2023 Aug 23. doi: 10.1007/s10071-023-01821-x. Online ahead of print.ABSTRACTMany animals express unlearned colour preferences that depend on the context in which signals are encountered. These colour biases may have evolved in response to the signalling system to which they relate. For example, many aposematic animals advertise their unprofitability with red warning signals. Predators' innate biases against these warning colours have been suggested as one of the potential explanations for the initial evolution of aposematism. It is unclear, however, whether unlearned colour preferences reported in a number of sp...
Source: Animal Cognition - August 23, 2023 Category: Zoology Authors: Francesca Protti-S ánchez Uwe Mayer Hannah M Rowland Source Type: research
