2012) detected growth bands in calcified regions of the eyestalk
and gastric mill in shrimp, crabs, and lobsters, and suggested the growth bands form annually; however, age validation was not conducted.
Dr Kilada and five other Canadian researchers took a closer look at lobsters, snow crabs, northern shrimp and sculptured shrimp and discovered that growth rings could be found in their eyestalk
The influence of eyestalk
ablation on the reproduction of the freshwater Macrobrachium acanthurus shrimp in captivity.
Vitellogenin production induced by eyestalk
ablation in juvenile giant freshwater prawn Macrobrachium rosenbergii and trial methyl farnesoate administration.
The initial volume ran 106 pages and carried nine articles on topics ranging from the effects of eyestalk
ablation on molting, growth, reproduction, and energy budget of Macrobrachium nobilii; leguiminous seeds as protein sources for milkfish, and maintenance of genetic quality in cultured tilapia, to parasites of wild and diseased young cultured golden snappers in Malaysia, aspects of reproductive biology of stolephorid anchovies in Papua New Guinea, and experimental culture of Penaeus semisulcatus, P.
The independent ability to manage triggered responses is one feature that sets the Eyestalk
system apart from basic IP cameras.
Haemolymph metabolic variables in relation to eyestalk
ablation and gonad development of Pacific white shrimp Litopenaeus vannamei Boone.
To find out whether this hormone played a role in the migration of red crabs, Morris and colleagues measured concentrations of CHH in the crabs' eyestalk
glands and blood during the wet and dry seasons.
It is well known that gonadal maturation of crustaceans is regulated principally by two antagonistic neural hormones: gonad-inhibiting hormone synthesized and secreted from the X-organ-sinus gland complex of the eyestalk
, and gonad-stimulating hormone thought to be produced by the brain and thoracic ganglion (Subramoniam 2011, Swetha et al.
He also highlighted potentially significant anatomical similarities including a peduncle posterior to the right eyestalk
(distinct from the subocular tentacle) and hooded rachidian teeth in the radula, but pointed out that these may be plesiomorphic character states.
Several causes could have changed the different activity of digestive enzymes in relation to the molting cycle and ovarian maturation: the absence of feeding during postmolt and late premolt, the coincidence of the beginning of the feeding process with oocyte development, and the influence of stimulating and inhibiting substances derived from eyestalk
Cephalic lappets present but small and not extending across forehead; right postocular peduncle well developed, similar in size to eyestalk
or perhaps larger; right subocular tentacle not evident; neck lobes similar, each with 5 or 6 tentacles of varying size; epipodium posterior to neck lobes with 4 or 5 tentacles of varying sizes on each side, with an epipodial sense organ faintly discernable at base of larger ones.