Timing of digestion, absorption and assimilation in octopus species from tropical (Octopus maya) and subtropical-temperate (O. mimus) ecosystems

Linares, Mauricio; Caamal‐Monsreal, Claudia; Paz, Alberto Olivares; Sánchez, Ariadna; Rodríguez, S.; Zúñiga, Óscar; Pascual, Cristina; Gallardo, Pedro; Rosas, Carlos

doi:10.3354/ab00642

Cited by 28 publications

(66 citation statements)

References 48 publications

(63 reference statements)

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“…Those results and others obtained from experiments performed with O. maya indicate that the type and level of protein are the principal source of metabolic energy in the muscle, while lipids are the principal source of energy for DG intracellular metabolism (Martínez et al, 2011; Rosas et al, 2011; Baeza-Rojano et al, 2013). Similar results were observed in O. mimus , indicating that the biochemical pathways observed in O. maya could be generalized to other octopus species (Linares et al, 2015). …”

Section: Nutrient Process In Digestive Glandsupporting

confidence: 76%

“…As in other octopus species, chymotrypsin activity in O. maya and O. mimus was detected as the principal enzyme of salivary glands involved in external digestion, where a pre-digestion of raw flesh produces soluble proteins that form the chyme when ingested (Aguila et al, 2007; Linares et al, 2015). Forty to eighty minutes after feeding, the first chyme rapidly fills the crop, stomach and octopus caecum.…”

Section: Starting the Digestion Processmentioning

confidence: 82%

“…Linares et al (2015) showed that protein catabolism and glycogen synthesis in O. maya and O. mimus followed an inverse relationship throughout the digestive process. In that study, glycogen accumulation occurred at the end of the digestive process, when the AA and polypeptides were transformed into glycogen via the gluconeogenesis pathway.…”

Section: Nutrient Process In Digestive Glandmentioning

confidence: 99%

“…Therefore, lyophilisation was considered the method that maintained native protein in octopus diets, through facilitation of cathepsin enzyme activity, and in consequence better diet digestibility (Martínez et al, 2014; Tercero-Iglesias et al, 2015). Although, the effect of the pH on the GJ and DG enzymes was only established in O. maya (Martínez et al, 2011), Linares et al (2015) observed that high enzymatic activity can be obtained when the gastric juice of O. mimus is assayed in relatively low pH (5.5). Considering that only an 18% enzyme inhibition was observed when pepstatin A was used in O. maya GJ, it is possible to hypothesize that there are other cathepsins working in the acidic environments of the GJ.…”

Section: Digestive Enzymesmentioning

confidence: 99%

“…Those enzymes could be sent to the digestive tract, where a reduction of pH was also registered (Linares et al, 2015). Reduction of enzymatic activity could also indicate that enzymes in the new gastric juice were zymogens that require the chyme to be totally activated.…”

Section: Octopus Maya and O Mimus Digestive Timingmentioning

confidence: 99%

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Digestive Physiology of Octopus maya and O. mimus: Temporality of Digestion and Assimilation Processes

et al. 2017

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Digestive physiology is one of the bottlenecks of octopus aquaculture. Although, there are successful experimentally formulated feeds, knowledge of the digestive physiology of cephalopods is fragmented, and focused mainly on Octopus vulgaris. Considering that the digestive physiology could vary in tropical and sub-tropical species through temperature modulations of the digestive dynamics and nutritional requirements of different organisms, the present review was focused on the digestive physiology timing of Octopus maya and Octopus mimus, two promising aquaculture species living in tropical (22–30°C) and sub-tropical (15–24°C) ecosystems, respectively. We provide a detailed description of how soluble and complex nutrients are digested, absorbed, and assimilated in these species, describing the digestive process and providing insight into how the environment can modulate the digestion and final use of nutrients for these and presumably other octopus species. To date, research on these octopus species has demonstrated that soluble protein and other nutrients flow through the digestive tract to the digestive gland in a similar manner in both species. However, differences in the use of nutrients were noted: in O. mimus, lipids were mobilized faster than protein, while in O. maya, the inverse process was observed, suggesting that lipid mobilization in species that live in relatively colder environments occurs differently to those in tropical ecosystems. Those differences are related to the particular adaptations of animals to their habitat, and indicate that this knowledge is important when formulating feed for octopus species.

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