Octopus Senescence: The Beginning of the End

  title={Octopus Senescence: The Beginning of the End},
  author={Roland C. Anderson and James B. Wood and Ruth A. Byrne},
  journal={Journal of Applied Animal Welfare Science},
  pages={275 - 283}
Senescence is a normal stage of an octopus's life cycle that often occurs before death. Some of the following symptoms typify it: lack of feeding, retraction of skin around the eyes, uncoordinated movement, increased undirected activity, and white unhealing lesions on the body. There is inter- and intraspecific variability. Senescence is not a disease or a result of disease, although diseases can also be a symptom of it. Both males and females go through a senescent stage before dying-the males… 

Cephalopod Senescence and Parasitology

A suppressed immune system may increase susceptibility to parasite infection in senescent cephalopod species, particularly in Octopus vulgaris and Octopus maya.

Comparison of Behavior, Histology and ImpL2 Gene Expression of Octopus sinensis Under Starvation and Senescence Conditions

Offshore cephalopods usually experience a short and extreme senescence process at the end of their lives. Unique behaviors such as brooding and fasting occur during this period. The cause of

Egg laying and embryo development of Octopus huttoni in response to temperature and season

Reproduction was found to occur all year-round, but there was a tendency to lay eggs in the spring and summer, most likely due to the increase in planktonic food production during this time of year.

Behaviour Development: A Cephalopod Perspective

  • J. Mather
  • Environmental Science
    International Journal of Comparative Psychology
  • 2006
Evaluating the development of behaviour from the viewpoint of the intelligent and learning dependent cephalopod mollusks as a contrast to that of mammals finds that Sepia officinalis cuttlefish have a swift decline in memory capacity and also brain degeneration during their short period of senescence.

Senescence as a trade-off between successful land colonisation and longevity: critical review and analysis of a hypothesis

Senescence may have emerged as a side effect of the evolution of adaptive features that allowed the colonisation of land, and may be a compromise between land colonisation and longevity in mammals.

Reproductive Biology of the Common Octopus (Octopus vulgaris Cuvier, 1797) in South Kenya

Sexual staging of gonads indicated that the common octopus was breeding year round with a spawning peak from June to August, and the lowest gonadosomatic index values were recorded during the month of September, indicating the end of the spawning period.

Oviducal gland transcriptomics of Octopus maya through physiological stages and the negative effects of temperature on fertilization

The molecular bases of octopus fertilization and egg-laying, and how they are affected by elevated temperatures are understood to better understand the effect of temperature on the expression of key reproductive genes.

Response of optic gland pathways to thermal stress in the reproductive phase of female Octopus maya

Investigating the molecular mechanisms that prevent reproduction at elevated temperatures in Octopus maya found changes in optic gland gene expression in O. maya may be the basis for the high-temperature inhibition of egg-laying, previously observed from this octopus species.

The Lesser Pacific Striped Octopus, Octopus chierchiae: An Emerging Laboratory Model

Novel methods for multigenerational culture of O. chierchiae are described, which propose that this small octopus possesses both the practical and biological features needed for a model octopus that can be cultured repeatedly to address a wide range of biological questions.

Reproductive status, antioxidant defences and lipid peroxidation in Octopus tehuelchus (Cephalopoda: Octopodidae) females

The results show that during sexual maturation and after natural oxidative stress conditions (spawning), only oviducal glands show changes that can be linked with the physiological processes of different reproductive status, which could be associated with the semelparous life history of this species.



Reproduction and condition of female Octopus mimus (Mollusca: Cephalopoda)

The relationship between reproduction and condition was studied in a 15 mo sample of 919 maturing, mature and post-spawning female Octopus mimus caught in Iquique (North Chile), where condition deteriorated dramatically after spawning, during parental care of the eggs.

Reproduction versus somatic growth: hormonal control in Octopus vulgaris.

Octopus vulgaris can be forced into precocious maturity by removal of the subpedunculate lobe from the brain, an operation that releases the optic glands from inhibition, and allows them to secrete a gonadotropin, which increases the release of amino acids from muscle.

Hormonal Inhibition of Feeding and Death in Octopus: Control by Optic Gland Secretion

Female Octopus hummelincki lays eggs, broods them, reduces its food intake, and dies after the young hatch. Removal of both optic glands after spawning results in cessation of broodiness, resumption

Spawning Mode and Reproductive Output of the Tropical Cephalopod Idiosepius pygmaeus

Reproductive biology of the tropical sepioid cephalopod Idiosepius pygmaeus was investigated in wild specimens and in individuals maintained in aquaria through the adult life span, indicating a coordination of reproductive and somatic growth.

Assessment of the mating history of female pygmy octopuses and a possible sperm competition mechanism

  • J. Cigliano
  • Biology, Environmental Science
    Animal Behaviour
  • 1995

Laboratory maintenance, breeding, rearing, and biomedical research potential of the Yucatan octopus (Octopus maya).

Eggs of the Yucatan octopus, Octopus maya, were collected at Campeche, Mexico, transported to Hawaii, and incubated in glass funnels. Benthic juveniles hatched from the large (17-mm) eggs and were

Laboratory maintenance, breeding, rearing, and biomedical research potential of the Yucatan octopus (Octopus maya).

Eggs of the Yucatan octopus, Octopus maya, were collected at Campeche, Mexico, transported to Hawaii, and incubated in glass funnels. Benthic juveniles hatched from the large (17-mm) eggs and were

Advances in the laboratory culture of octopuses for biomedical research.

Five species of Octopus were cultured in pilot, large-scale 2,600 liter circulating seawater systems and Octopus bimaculoides showed superior qualities for laboratory culture, along with their uses in biomedical research.

The constraints on cephalopods: why squid aren't fish

The basic inefficiency of the jet-propulsion system has required bioenergetic, physiological, and biochemical adaptations in squid which maximize their metabolic rates, which resulted in the short life history and semelparous reproductive patterns that seem to characterize these coleoid cephalopods.

Do larger cephalopods live longer? Effects of temperature and phylogeny on interspecific comparisons of age and size at maturity

It is concluded that coleoid cephalopods achieve larger size by delaying maturity and that temperature, as well as phylogeny, must be considered when making interspecific comparisons.