Squid as Experimental Animals

A ‘FitBit for squid’ could help track the ocean’s squishier species
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Squid as Experimental Animals

ID for Octopus from eBay. Feb 1, Ebay listings. Sources for Cephalopods and Food. Aug 8, Although it is possible that the within-trial declines we observed might be due to fatigue or some other non-mnemonic factor, such effects cannot account for the across-trial effect of reduced responses on the first presentation on subsequent days.

Both within- and across-trial habitation have been demonstrated in other cephalopods Angermeier and Dassler, ; Kuba et al. We have recently demonstrated stable long-term associative memory in the species Zepeda et al. While adult squid also showed some inconsistent signs of short-term habituation to the predator model, they never exhibited long-term retention. We propose several explanations for why adults failed to commit the predator mimic to long-term memory. First, it is possible that E. Studies of cuttlefish S. This suggests that older or senescent cephalopods may have a failure to react to stimuli, even though they register it.

Second, it is possible that the predator mimic we used mimicked a predator specifically of juvenile squid. It is likely that wild E. Other studies on cephalopods have shown that familiarization with specific prey throughout early time periods leads to specific prey preferences Darmaillacq et al. It is possible that adult squid are not predated by benthic predators in the wild, and thus our mimic was less ecologically relevant to adults than to juveniles. Predation risk is generally related to body size, and as individuals grow they face different predators Werner and Gilliam, Additionally, the adult E.

Third, it is possible that our study was unable to clearly identify adult defensive behaviors. For example, adults may engage in burying as a defensive behavior more often than highly escalated and highly visible behavior such as inking; since our experimental set-up did not include substrate, we may have been unable to clearly distinguish burying behavior in adults from avoidant swimming or jetting. Captive bred Euprymna express ecologically relevant, easily quantifiable defensive behaviors in controlled experimental settings.

Here, we demonstrate the feasibility of using first and second generation captive bred specimens of E. Further, we show that squid, which are rarely used in behavioral experiments, express robust non-associative learning and memory, a finding that broadens knowledge of the diversity of behaviors in cephalopods.

Finally, we suggest that studies such as those described here have the possibility of enlightening broad debates about origins of intelligence, the neuroanatomical and physiological underpinnings of neural plasticity, and the evolution of complex behaviors. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

We thank members of the Crook Laboratory at SF State for assistance with animal husbandry and for additional data analysis. Bret Grasse from the Monterrey Bay Aquarium provided invaluable advice on Euprymna husbandry and breeding. Alupay, J.

"We now have proof" sonar blasts can harm squid, expert says.

They remained healthy and behaved normally. The mechanics of growth and residual stress in biological cylinders Stephen George O'Keeffe. These electrodes recorded the electrical activity in each larva's eyes as its retinas reacted to light —"kind of like an EKG [electrocardiogram], but for your eyes instead of your heart," McCormick said. Back Matter Pages The casing is 3D printable, and the electronics array will be open-sourced, so scientists may quickly develop tracking devices for other marine invertebrates previously difficult to monitor. Figures and Tables from this paper.

Arm injury produces long-term behavioral and neural hypersensitivity in octopus. Anderson, R.

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Escape responses of Euprymna scolopes Berry, Cephalopoda: Sepiolidae. Molluscan Stud. Angermeier, W. Inhibitory learning and memory in the lesser octopus Eledone cirrhosa.

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Editors: Adelman, W.J., Jr., Arnold, J.M., Gilbert, D.L. The predecessor to this book was A Guide to the Laboratory Use of the Squid Loligo pealei published by the Marine Biological Laboratory, Woods Hole, Massachusetts in The book is intended for laboratory technicians. The predecessor to this book was A Guide to the Laboratory Use of the Squid Loligo pealei published by the Marine Biological Laboratory, Woods Hole.

Byrne, J. Nonassociative learning in invertebrates. Cold Spring Harb. Crook, R. A biphasic memory curve in the chambered nautilus, Nautilus pompilius L. Cephalopoda: Nautiloidea. Memory of visual and topographical features suggests spatial learning in nautilus Nautilus pompilius L. Peripheral injury induces long-term sensitization of defensive responses to visual and tactile stimuli in the squid Loligo pealeii , Lesueur Darmaillacq, A.

Food imprinting, new evidence from the cuttlefish Sepia officinalis. Early familiarization overrides innate prey preference in newly hatched Sepia officinalis cuttlefish. Fiorito, G. Observational learning in Octopus vulgaris. Science , — Glanzman, D. Common mechanisms of synaptic plasticity in vertebrates and invertebrates. Kimbell, J. Two genetically distinct populations of bobtail squid, Euprymna scolopes , exist on the Island of O'ahu.

Structure of the squid rhodopsin

Pacific Sci. Kuba, M. Exploration and habituation in intact free moving Octopus vulgaris. Google Scholar.

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When do octopuses play? Effects of repeated testing, object type, age, and food deprivation on object play in Octopus vulgaris. Lee, P. The Hawaiian bobtail squid Euprymna scolopes : a model to study the molecular basis of eukaryote-prokaryote mutualism and the development and evolution of morphological novelties in cephalopods. Mather, J.

Cephalopod consciousness: behavioural evidence. Moynihan, M.

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Notes on the behavior of Euprymna scolopes Cephalopoda: Sepiolidae. Behaviour 85, 25— Nyholm, S. The winnowing: establishing the squid—vibrio symbiosis. Oshima, M. Peripheral injury alters schooling behavior in squid, Doryteuthis pealeii.

Processes , 89— Richter, J. Pull or push?