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GnRH in the brain and ovary of Sepia officinalis
Peptides, 2009We have cloned from brain, ovary and eggs of the cephalopod Sepia officinalis a 269-bp PCR product, which shares 100% sequence identity with the open reading frame of GnRH isoform isolated from Octopus vulgaris. Similar to Octopus, this sequence encodes a peptide that is organized as a preprohormone from which, after enzymatic cleavage, a dodecapeptide
C. DI CRISTO, E. DE LISA, DI COSMO, ANNA
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Sperm nucleomorphogenesis in the cephalopod Sepia officinalis
Tissue and Cell, 2007Sperm nucleomorphogenesis in the cephalopod Sepia officinalis is the product of the interaction between perinuclear microtubules and condensing chromatin. This interaction occurs during spermiogenesis and is established through the nuclear membrane. As in other cephalopod species, the perinuclear microtubules are transient structures. In the case of S.
F, Martínez-Soler, K, Kurtz, M, Chiva
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Arm regeneration in two species of cuttlefish Sepia officinalis and Sepia pharaonis
Invertebrate Neuroscience, 2013To provide quantitative information on arm regeneration in cuttlefish, the regenerating arms of two cuttlefish species, Sepia officinalis and Sepia pharaonis, were observed at regular intervals after surgical amputation. The third right arm of each individual was amputated to ~10-20 % starting length.
Jedediah, Tressler +4 more
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Learning performances and aging in cuttlefish (Sepia officinalis)
Experimental Gerontology, 1992The use of an associative learning protocol with negative reinforcement allowed us to compare the performances of three groups of animals: young, middle-aged, and senescent. Statistical analysis of the results does not enable us to assert that a significant difference exists between the learning speeds of young and senescent animals.
R, Chichery, M P, Chichery
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On The Respiratory Flow in the Cuttlefish Sepia Officinalis
Journal of Experimental Biology, 1994ABSTRACT The respiratory flow of water over the gills of the cuttlefish Sepia officinalis at rest is produced by the alternate activity of the radial muscles of the mantle and the musculature of the collar flaps; mantle circular muscle fibres are not involved. Inspiration takes place as the radial fibres contract, thinning the mantle and
Q, Bone, E, Brown, G, Travers
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The quaternary structure of Sepia officinalis haemocyanin
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1986Abstract The haemocyanin (Hc) of Sepia officinalis is constituted of ten identical subunits ( M r about 390 000), which consist of eight functional (dioxygen-binding) units, designated by the letters a–h . A model is proposed for the quaternary structure of this HC, based on immuno-electron microscopy of whole molecules and on morphological ...
Trijntje Wichertjes +5 more
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The visual attack of the cuttlefish, Sepia officinalis
Animal Behaviour, 1968Abstract 1. 1. The attack by Sepia on prawns comprises three phases: attention, positioning and seizure . 2. 2. In attention there are colour changes, erection of the first and second pair of arms and movements of the eyes and head. The whole animal turns (by up to 180 °) so that the prey comes to lie on a forward extension of the body ...
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Metal ion content in Sepia officinalis melanin
Marine Chemistry, 1992Abstract A dissolution procedure for the analysis of the metal content in Sepia officinalis melanin has been optimized and checked against a bovine liver Community Bureau of Reference (BCR) certified reference material. The content of several metal ions has been determined by GF-AAS and ICP-AES techniques in samples of Sepia officinalis melanin ...
SARZANINI C +4 more
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The Influence of Photoperiodicity on Hatching ofSepia Officinalis
Journal of the Marine Biological Association of the United Kingdom, 1991The influence of photoperiodicity on hatching ofSepia officinaliswas investigated under different experimental light-dark (LD) conditions. The results are viewed in relation to some relevant properties of the perivitelline fluid (PVF) and the egg capsule during embryonic development. In embryos ofS. officinalisthe transition from light to dark ap-pears
Paulij, W.P. +3 more
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