Spatial learning and memory retention in the grey bamboo shark (Chiloscyllium griseum)

Schluessel, Vera; Bleckmann, Horst

doi:10.1016/j.zool.2012.05.001

Cited by 57 publications

(26 citation statements)

References 62 publications

(80 reference statements)

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“…Results obtained for rays matched those for sharks (Fuss et al 2014a, b) and goldfish (Rodriguez et al 1994;Rodriguez et al 2011). It was furthermore shown, that spatial information in sharks was retained for at least six weeks (which was the maximally tested period) (Schluessel and Bleckmann 2012). These experiments support the general concept that elasmobranchs, like other animals, can use different orientation strategies alone or in combination to locate a goal position (Burgess 2006).…”

supporting

confidence: 64%

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

Schluessel

Herzog

Scherpenstein

2015

Behavioural Processes

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supporting

confidence: 64%

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

Schluessel

Herzog

Scherpenstein

2015

Behavioural Processes

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“…Recent research has finally been shedding light onto the previously neglected and often disputed cognitive abilities within this group, specifically in regards to learning and memory. Results indicate that the once popular disclaimer “primitive fish with primitive brains” is well and truly out of date and that sharks and rays can solve many cognitive tasks to the same extent as other vertebrates (Reviewed by Guttridge et al, 2010; Schluessel and Bleckmann, 2005, 2012; Kuba et al, 2010; Spaet et al, 2010; Schwarze et al, 2013; Fuss et al, 2014a,b,c; Kimber et al, 2014). Nonetheless, many questions regarding cognition in elasmobranchs still remain unanswered, whereas cognition in teleosts has been studied in much more detail and has been summarized in a detailed review by Brown et al (2011).…”

Section: Introductionmentioning

confidence: 99%

The brain creates illusions not just for us: sharks (Chiloscyllium griseum) can â€œsee the magicâ€ as well

Fuss

Bleckmann

Schluessel

2014

Front. Neural Circuits

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Bamboo sharks (Chiloscyllium griseum) were tested for their ability to perceive subjective and illusionary contours as well as line length illusions. Individuals were first trained to differentiate between squares, triangles, and rhomboids in a series of two alternative forced-choice experiments. Transfer tests then elucidated whether Kanizsa squares and triangles, grating gaps and phase shifted abutting gratings were also perceived and distinguished. The visual systems of most vertebrates and even invertebrates perceive illusionary contours despite the absence of physical luminance, color or textural differences. Sharks are no exception to the rule; all tasks were successfully mastered within 3–24 training sessions, with sharks discriminating between various sets of Kanizsa figures and alternative stimuli, as well as between subjective contours in >75% of all tests. However, in contrast to Kanizsa figures and subjective contours, sharks were not deceived by Müller-Lyer (ML) illusions. Here, two center lines of equal length are comparatively set between two arrowheads or –tails, in which case the line featuring the two arrow tails appears to be longer to most humans, primates and birds. In preparation for this experiment, lines of varying length, and lines of unequal length randomly featuring either two arrowheads or -tails on their ends, were presented first. Both sets of lines were successfully distinguished by most sharks. However, during presentation of the ML illusions sharks failed to succeed and succumbed either to side preferences or chose according to chance.

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“…Also in Chondrichthyes or cartilaginous fish data concerning their spatial capabilities are really scarce, but a few experimental and field studies show that sharks (elasmobranchs) can use different strategies for navigation, and have long-term spatial memory [50]- [52]. No data are available relative to this issue in agnathans.…”

Section: Map-like Memories and Hippocampal Pallium In Anamniotesmentioning

confidence: 99%

Hippocampal Pallium and Map-Like Memories through Vertebrate Evolution

Broglio¹,

Martín-Monzón²,

Ocaña³

et al. 2015

JBBS

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The hippocampus in humans and other mammals is essential for episodic and relational memories. Comparative evidence indicates that a hippocampal pallium homologue is present in birds, reptiles, amphibians, ray-finned fishes, cartilaginous fishes and agnathans. Some of their characteristics, such as the topological position and the pattern of connectivity, appear remarkably well conserved. We review here substantial data showing that in all the vertebrate groups studied up to date, from fish to mammals, the hippocampus plays a fundamental role in spatial memory. In these vertebrates groups, the hippocampal pallium homologue is involved in the use of map-like, relational representations of the objective space that provide stable allocentric frames of reference, thus allowing flexible navigation. These similarities suggest a common evolutionary ancestry and indicate that the functional properties of the hippocampus appear early in the vertebrate phylogenesis and are retained through the independent evolution of the vertebrate lineages.

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Spatial learning and memory retention in the grey bamboo shark (Chiloscyllium griseum)

Cited by 57 publications

References 62 publications

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

The brain creates illusions not just for us: sharks (Chiloscyllium griseum) can â€œsee the magicâ€ as well

Hippocampal Pallium and Map-Like Memories through Vertebrate Evolution

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Spatial learning and memory retention in the grey bamboo shark (Chiloscyllium griseum)

Cited by 57 publications

References 62 publications

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

Seeing the forest before the trees–spatial orientation in freshwater stingrays (Potamotrygon motoro) in a hole-board task

The brain creates illusions not just for us: sharks (Chiloscyllium griseum) can â€œsee the magicâ€ as well

Hippocampal Pallium and Map-Like Memories through Vertebrate Evolution

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The brain creates illusions not just for us: sharks (Chiloscyllium griseum) can â€œsee the magicâ€ as well