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Full-Text Articles in Psychology
Do Female Rainbowfish (Melanotaenia Spp.) Prefer To Shoal With Familiar Individuals Under Predation Pressure?, Culum Brown
Do Female Rainbowfish (Melanotaenia Spp.) Prefer To Shoal With Familiar Individuals Under Predation Pressure?, Culum Brown
Sentience Collection
Shoaling with familiar individuals may have many benefits including enhanced escape responses or increased foraging efficiency. This study describes the results of two complimentary experiments. The first utilised a simple binary choice experiment to determine if rainbowfish (Melanotaenia spp.) preferred to shoal with familiar individuals or with strangers. The second experiment used a “free range” situation where familiar and unfamiliar individuals were free to intermingle and were then exposed to a predator threat. Like many other small species of fish, rainbowfish were capable of identifying and distinguishing between individuals and choose to preferentially associate with familiar individuals as opposed to …
Physiology And Behavior Of Dogs During Air Transport, Renée Bergeron, Shannon L. Scott, Jean-Pierre Émond, Florent Mercier, Nigel J. Cook, Al L. Schaefer
Physiology And Behavior Of Dogs During Air Transport, Renée Bergeron, Shannon L. Scott, Jean-Pierre Émond, Florent Mercier, Nigel J. Cook, Al L. Schaefer
Stress Collection
Twenty-four beagles were used to measure physiological and behavioral reactions to air transport. Each of 3 groups of 4 sedated (with 0.5 mg/kg body weight of acepromazine maleate) and 4 non-sedated (control) dogs was flown on a separate flight between Montreal, Quebec, and Toronto, Ontario, after being transported by road from Quebec City to Montreal. Saliva and blood samples were taken before ground and air transport and after air transport. The heart rate was monitored during the whole experiment except during ground transport, and behavior was monitored by video during air transport. Sedation did not affect any of the variables …
Vigilance And Predation Risk In Gunnison’S Prairie Dogs (Cynomys Gunnisoni), J. L. Verdolin, C. N. Slobodchikoff
Vigilance And Predation Risk In Gunnison’S Prairie Dogs (Cynomys Gunnisoni), J. L. Verdolin, C. N. Slobodchikoff
Sentience Collection
Group living in animals is believed to confer advantages related to a decrease in predation risk and an energetic trade-off between vigilance and foraging efficiency. Eight Gunnison’s prairie dog, Cynomys gunnisoni, colonies in Flagstaff, Arizona (elevation 2300 m), were studied from April to August 2000 to examine the adaptive significance of colonial living in the context of predation risk and antipredator behavioral strategies. Each colony was sampled once every 10 days for a period of 3 h. Upright and quadrepedal vigilance was recorded using scan samples. All predation events were recorded. Results suggest that vigilant behavior in Gunnison’s prairie dogs …
Social Learning Of A Novel Avoidance Task In The Guppy: Conformity And Social Release, Culum Brown, Kevin N. Laland
Social Learning Of A Novel Avoidance Task In The Guppy: Conformity And Social Release, Culum Brown, Kevin N. Laland
Sentience Collection
Studies of social learning suggest that many animals are disproportionately likely to adopt the behavior of the majority, and that this conformist transmission hinders the spread of novel behavioural variants. However, novel learned behaviour patterns regularly diffuse through animal populations. We propose a hypothesis, termed the ‘social release hypothesis’, that resolves these apparently conflicting findings by suggesting that animals are released from conforming to traditional behaviour in the absence of demonstrators. We investigated the role of pretrained, female demonstrator guppies, Poecilia reticulata, in influencing the escape response of untrained females to an artificial predator. Naïve ‘observer’ guppies were given the …
Convergence Of Complex Cognitive Abilities In Cetaceans And Primates, Lori Marino
Convergence Of Complex Cognitive Abilities In Cetaceans And Primates, Lori Marino
Sentience Collection
What examples of convergence in higher-level complex cognitive characteristics exist in the animal kingdom? In this paper I will provide evidence that convergent intelligence has occurred in two distantly related mammalian taxa. One of these is the order Cetacea (dolphins, whales and porpoises) and the other is our own order Primates, and in particular the suborder anthropoid primates (monkeys, apes, and humans). Despite a deep evolutionary divergence, adaptation to physically dissimilar environments, and very different neuroanatomical organization, some primates and cetaceans show striking convergence in social behavior, artificial ‘language’ comprehension, and self-recognition ability. Taken together, these findings have important implications …
Cognitive And Communicative Abilities Of Grey Parrots, Irene M. Pepperberg
Cognitive And Communicative Abilities Of Grey Parrots, Irene M. Pepperberg
Sentience Collection
Grey parrots (Psittacus erithacus) solve various cognitive tasks and acquire and use English speech in ways that often resemble those of very young children. Given that the psittacine brain is organized very differently from that of mammals, these results have intriguing implications for the study and evolution of vocal learning, communication, and cognition.
Chimpanzees (Pan Troglodytes) Recognize Spatial And Object Correspondences Between A Scale Model And Its Referent, Valerie A. Kuhlmeier, Sarah T. Boysen
Chimpanzees (Pan Troglodytes) Recognize Spatial And Object Correspondences Between A Scale Model And Its Referent, Valerie A. Kuhlmeier, Sarah T. Boysen
Sentience Collection
In the present study, the contributions of spatial and object features to chimpanzees’ comprehension of scale models were examined. Seven chimpanzees that previously demonstrated the ability to use a scale model as an information source for the location of a hidden item were tested under conditions manipulating the feature correspondence and spatial-relational correspondence between objects in the model and an outdoor enclosure. In Experiment 1, subjects solved the task under two conditions in which one object cue (color or shape) was unavailable, but positional cues remained. Additionally, performance was above chance under a third condition in which both types of …
In Search Of King Solomon’S Ring: Cognitive And Communicative Studies Of Grey Parrots (Psittacus Erithacus), Irene M. Pepperberg
In Search Of King Solomon’S Ring: Cognitive And Communicative Studies Of Grey Parrots (Psittacus Erithacus), Irene M. Pepperberg
Sentience Collection
During the past 24 years, I have used a modeling technique (M/R procedure) to train Grey parrots to use an allospecific code (English speech) referentially; I then use the code to test their cognitive abilities. The oldest bird, Alex, labels more than 50 different objects, 7 colors, 5 shapes, quantities to 6, 3 categories (color, shape, material) and uses ‘no’, ‘come here’, wanna go X’ and ‘want Y’ (X and Y are appropriate location or item labels). He combines labels to identify, request, comment upon or refuse more than 100 items and to alter his environment. He processes queries to …