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

@article{Wodinsky1977HormonalIO,
  title={Hormonal Inhibition of Feeding and Death in Octopus: Control by Optic Gland Secretion},
  author={Jerome Wodinsky},
  journal={Science},
  year={1977},
  volume={198},
  pages={948 - 951}
}
  • J. Wodinsky
  • Published 2 December 1977
  • Biology, Environmental Science
  • Science
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 of feeding, increased growth, and greatly extended life-span. Optic gland secretions may cause death of most cephalopods and may function to control population size. 

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.

Optic gland enlargement and female gonad maturation in a population of the octopuseledone cirrhosa: a multivariate analysis

This result supports the experimental evidence linking optic gland enlargement with female gonad maturation and suggests that this process occurs normally in the field population.

Egg development in the octopus Eledone cirrhosa

The development of egg/follieular cell complexes is described in maturing females of the octopus Eledone cirrhosa, marked by the columnar appearance of the follicle cells and an increased number of larger and more complex nuclei.

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.

Male reproductive maturity in the octopus, Eledone cirrhosa (Cephalopoda: Octopoda)

  • P. BoyleDaniela Knobloch
  • Biology, Environmental Science
    Journal of the Marine Biological Association of the United Kingdom
  • 1984
No evidence was obtained for a seasonal trend in male maturity and growth of the testis precedes that of the spermatophoric sac, and the size of neither of these reproductive components is predictable from body weight.

Octopus Senescence: The Beginning of the End

This study discusses the ecological implications of senescence in octopus and discusses the males after mating, the females while brooding eggs and after the eggs hatch.

Antigen-induced secretion in the optic gland of Octopus vulgaris

  • D. Froesch
  • Biology
    Proceedings of the Royal Society of London. Series B. Biological Sciences
  • 1979
The optic gland hormone, which is known to control sexual maturation, feeding and death in Octopus, appears to be involved in a defence mechanism against non-octopus proteins.

AGE RELATED CHANGES IN REPRODUCTIVE ACTIVITY AND GROWTH IN INDOPLANORBIS EXUSTUS

Molluscs, especially several gastropods species, provide suitable model systems for studies on neuroendocrine control of reproduction and experimental results are not decisively in favor of either the oocytes depletion in the ovaries or the brain centers that control reproductive activity.
...

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