Care and Enrichment for Captive Cephalopods

Cooke, Gavan M.; Tonkins, Belinda M.; Mather, Jennifer A.

doi:10.1007/978-3-030-13947-6_8

Cited by 13 publications

(10 citation statements)

References 147 publications

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“…Cephalopods are highly specialized invertebrates with particular characteristics, such as sophisticated brains and nervous systems ( Shigeno et al, 2018 ) visual, mechanoreceptive, olfactory, and chemosensory abilities ( Cooke et al, 2019b ) complex behavioral and learning capabilities ( Hanlon and Messenger, 2018 ) among others. These characteristics are important to improve the current understanding of cephalopods welfare requirements.…”

Section: Introductionmentioning

confidence: 99%

Short and Long-Term Effects of Anesthesia in Octopus maya (Cephalopoda, Octopodidae) Juveniles

et al. 2020

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This study aimed to explore different substances (or cold sea water) as potential anesthetic agents to facilitate short-term handling in Octopus maya juveniles. We investigated oxygen consumption before (baseline), during (first 600 s of exposure) and after anesthesia (recovery) of octopuses ( n = 98; 1.67 ± 0.5 g) exposed to cold sea water (SW; 11 and 13°C), ethanol (EtOH; 0.5; 1.5 and 3.0%), magnesium chloride (MgCl 2 ; 0.75; 1.5 and 3.75%), ethanol combined with magnesium chloride (Mix; 1.5:0.75%; 0.75:1.13%; and 2.25:0.37%) and clove oil (0.15 mL L –1 ). After exposure, the animals were handled for 180 s (exposed to air) and weighted. Two experimental groups not exposed to anesthetics (with or without handling) were also evaluated. The criteria for general anesthesia were analysed. Times of induction and recovery, incidence of attack response after recovery and possible longer-term effects of repeated general anesthesia on growth and mortality of the octopuses were evaluated. During anesthesia, O. maya juveniles exposed to SW (11 and 13°C), EtOH (0.5; 1.5 and 3.0%), Mix (0.75:1.13%), and clove oil, presented a significant decrease on oxygen consumption. In animals exposed to different concentrations of EtOH and Mix 0.75:1.13%, this decrease was registered after an increase on oxygen consumption. Animals exposed to MgCl 2 did not show significant changes on oxygen consumption, except for animals exposed MgCl 2 3.75%, which showed a significant increase on oxygen consumption. At the end of recovery, except for octopuses exposed to clove oil and MgCl 2 0.75%, the values of oxygen consumption observed were comparable to the ones registered during baseline. Animals exposed to SW 11°C, EtOH 3.0%, Mix 1.5:0.75% and MgCl 2 3.75% fulfilled the criteria defined for general anesthesia. Exposure to MgCl 2 (all concentrations), SW 13°C and clove oil reduced or inhibited the incidence of attack response after recovery. Except for animals exposed to clove oil, growth of the juveniles was not affected by the exposure to the different substances. Short-term handling (180 s) of O. maya juveniles can eventually be carried out without anesthesia. However, to facilitated handling, we suggest the use of EtOH 3.0% or cold sea water 11°C.

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Section: Introductionmentioning

confidence: 99%

Short and Long-Term Effects of Anesthesia in Octopus maya (Cephalopoda, Octopodidae) Juveniles

et al. 2020

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“…1 and from studies elsewhere 44 , that other patterns may occur in nature. Possible exceptions to the concept of actuarial senescence include a eusocial vertebrate, the naked mole rate 45 , some eusocial insects 46 , semelparous species such as cephalopods which die immediately after reproduction at an age reached by approximately 50% of the population 47 , and some plant species due to unique aspects of their biology 43,48 . Senescence in nature can also be masked by hunting which can create the wrong impression of no or even negative senescence, e.g.…”

Section: Resultsmentioning

confidence: 99%

A natural constant predicts survival to maximum age

Dureuil

Froese

2021

Commun Biol

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Information about the survival of species is important in many ecological applications. Yet, the estimation of a species’ natural mortality rate M remains a major problem in the management and conservation of wild populations, often circumvented by applying empirical equations that relate mortality to other traits that are more easily observed. We show that mean adult M can be approximated from the general law of decay if the average maximum age reached by individuals in a cohort is known. This is possible because the proportion P of individuals surviving to the average maximum age in a cohort is surprisingly similar across a wide range of examined species at 1.5%. The likely reason for the narrow range of P is a universal increase in the rate of mortality near the end of life, providing strong evidence that the evolutionary theories of ageing are the norm in natural populations.

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“…Enrichment is an important aspect of raising species with advanced cognition since it stimulates and encourages natural behaviors. Octopus are curious creatures that enjoy different textures and shapes [7] . Introducing different food types encouraged problem solving and manipulation common in their natural habitats [3] .…”

Section: Enrichmentmentioning

confidence: 99%

“…Even the change over from dead, hand-fed prey to hunting for live items served as enrichment since this required the use of problem solving and dexterity. During the first few months of development, octopus juveniles (> 2 months) preferred areas of concealment, so enrichment options used took this into account [7] …”

Section: Enrichmentmentioning

confidence: 99%

Husbandry and methodology for assessing learning and memory in the juvenile life stage of octopus

Hamlett

2024

MethodsX

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Care and Enrichment for Captive Cephalopods

Cited by 13 publications

References 147 publications

Short and Long-Term Effects of Anesthesia in Octopus maya (Cephalopoda, Octopodidae) Juveniles

Short and Long-Term Effects of Anesthesia in Octopus maya (Cephalopoda, Octopodidae) Juveniles

A natural constant predicts survival to maximum age

Husbandry and methodology for assessing learning and memory in the juvenile life stage of octopus

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