Octopus mimus

Effect of maternal temperature stress before spawning over the energetic balance of Octopus maya juveniles exposed to a gradual temperature change

“…For stressed females, the initial system temperature was 31°C, which was maintained for 10 days, and then the temperature dropped 1°C every 5 days until the system reached 24°C for a total of 40 days treatment. These conditions were selected because 24°C is the preferred temperature and has been recommended as the best condition for the spawn (Noyola et al, 2013a;Rosas et al, 2014). The water was heated by a 1200 W titanium immersion heater connected to a digital temperature sensor, both at a system reservoir.…”

Early life stage bottlenecks of carnivorous molluscs under captivity: a challenge for their farming and contribution to seafood production

“…The controlled conditions for broodstock in captivity allow the females to spawn at any time of the year (Zúñiga et al . ). To date, all studies made on O. mimus used wild and inseminated females collected from a depth of 20 m off the coast of Antofagasta, Chile (23° lat.S.).…”

“…; Zúñiga et al . ). Even if the female starvation still promotes the gonadal development, the female fecundity may decrease, whereas the quality of progeny in terms of paralarvae survival is not affected in comparison with fed females (A. Olivares, unpublished results).…”

“…At this age, the yolk reserves have been completely exhausted, because the internal yolk sac has been consumed between the fourth and fifth day after hatching (Zúñiga et al . ). Therefore, it would be necessary to study the reproductive success at different temperatures evaluating the efficient use of nutrients from the food reserve.…”

“…The production of juveniles from paralarvae reared under controlled conditions has not been successful in this species (Zúñiga et al . ). A possibility to protect this species, considering its high fecundity, could be the permanent repopulation of planktonic paralarvae by means of a control and protection system of mature females in captivity, considering the vulnerability of the females either to predators or to fishermen who extract them during the incubation period.…”