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Octopus vulgaris

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https://www.readbyqxmd.com/read/28425503/nerve-degeneration-and-regeneration-in-the-cephalopod-mollusc-octopus-vulgaris-the-case-of-the-pallial-nerve
#1
Pamela Imperadore, Sameer B Shah, Helen P Makarenkova, Graziano Fiorito
Regeneration is a process that restores structure and function of tissues damaged by injury or disease. In mammals complete regeneration is often unsuccessful, while most of the low phyla animals can re-grow many parts of their body after amputation. Cephalopod molluscs, and in particular Octopus vulgaris, are well known for their capacity to regenerate their arms and other body parts, including central and peripheral nervous system. To better understand the mechanism of recovery following nerve injury in this species we investigated the process of axon regrowth and nerve regeneration after complete transection of the Octopus pallial nerves...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28400734/embodied-organization-of-octopus-vulgaris-morphology-vision-and-locomotion
#2
Guy Levy, Binyamin Hochner
No abstract text is available yet for this article.
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28373845/perfused-gills-reveal-fundamental-principles-of-ph-regulation-and-ammonia-homeostasis-in-the-cephalopod-octopus-vulgaris
#3
Marian Y Hu, Po-Hsuan Sung, Ying-Jey Guh, Jay-Ron Lee, Pung-Pung Hwang, Dirk Weihrauch, Yung-Che Tseng
In contrast to terrestrial animals most aquatic species can be characterized by relatively higher blood [Formula: see text] concentrations despite its potential toxicity to the central nervous system. Although many aquatic species excrete [Formula: see text] via specialized epithelia little information is available regarding the mechanistic basis for NH3/[Formula: see text] homeostasis in molluscs. Using perfused gills of Octopus vulgaris we studied acid-base regulation and ammonia excretion pathways in this cephalopod species...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28335553/biosynthesis-of-polyunsaturated-fatty-acids-in-octopus-vulgaris-molecular-cloning-and-functional-characterisation-of-a-stearoyl-coa-desaturase-and-an-elongation-of-very-long-chain-fatty-acid-4-protein
#4
Óscar Monroig, Rosa de Llanos, Inmaculada Varó, Francisco Hontoria, Douglas R Tocher, Sergi Puig, Juan C Navarro
Polyunsaturated fatty acids (PUFAs) have been acknowledged as essential nutrients for cephalopods but the specific PUFAs that satisfy the physiological requirements are unknown. To expand our previous investigations on characterisation of desaturases and elongases involved in the biosynthesis of PUFAs and hence determine the dietary PUFA requirements in cephalopods, this study aimed to investigate the roles that a stearoyl-CoA desaturase (Scd) and an elongation of very long-chain fatty acid 4 (Elovl4) protein play in the biosynthesis of essential fatty acids (FAs)...
March 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28251828/enriched-environment-increases-pcna-and-parp1-levels-in-octopus-vulgaris-central-nervous-system-first-evidence-of-adult-neurogenesis-in-lophotrochozoa
#5
Carla Bertapelle, Gianluca Polese, Anna Di Cosmo
Organisms showing a complex and centralized nervous system, such as teleosts, amphibians, reptiles, birds and mammals, and among invertebrates, crustaceans and insects, can adjust their behavior according to the environmental challenges. Proliferation, differentiation, migration, and axonal and dendritic development of newborn neurons take place in brain areas where structural plasticity, involved in learning, memory, and sensory stimuli integration, occurs. Octopus vulgaris has a complex and centralized nervous system, located between the eyes, with a hierarchical organization...
March 2, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28223940/reconsideration-of-serial-visual-reversal-learning-in-octopus-octopus-vulgaris-from-a-methodological-perspective
#6
Alexander Bublitz, Severine R Weinhold, Sophia Strobel, Guido Dehnhardt, Frederike D Hanke
Octopuses (Octopus vulgaris) are generally considered to possess extraordinary cognitive abilities including the ability to successfully perform in a serial reversal learning task. During reversal learning, an animal is presented with a discrimination problem and after reaching a learning criterion, the signs of the stimuli are reversed: the former positive becomes the negative stimulus and vice versa. If an animal improves its performance over reversals, it is ascribed advanced cognitive abilities. Reversal learning has been tested in octopus in a number of studies...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28108174/experimental-infection-of-octopus-vulgaris-cuvier-1797-with-photobacterium-damsela-subsp-piscicida-immunohistochemical-tracking-of-antigen-and-tissue-responses
#7
Vasileios Bakopoulos, Daniella White, Michail-Aggelos Valsamidis, Feli Vasilaki
Adult common octopus individuals were intramuscularly infected with Photobacterium damsela subsp. piscicida in order to investigate if this species is sensitive to this common and important fish pathogen. The fate of the bacterial antigens and the tissue responses of Octopus vulgaris were studied employing immunohistochemical techniques. Strong reaction at the site of injection was evident from day 2 post-infection that continued until day 14. Great numbers of hemocytes that were attracted at the site of infection were involved in phagocytosis of bacteria...
March 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28087073/abnormal-mortality-of-octopus-after-a-storm-water-event-accumulated-lead-and-lead-isotopes-as-fingerprints
#8
J Raimundo, F Ruano, J Pereira, M Mil-Homens, P Brito, C Vale, M Caetano
Octopus vulgaris is a sedentary organism that inhabits coastal waters being exposed to anthropogenic compounds. Lead concentration in coastal environments reflects many processes and activities namely weathering, industrial and domestic discharges, and atmospheric deposition. Since lead isotopic composition is little affected by kinetic processes occurring between source and sink, its signature has been used to identify different Pb sources. After a short-term heavy rainfall, hundreds of octopus appeared dead in two Portuguese coastal areas...
January 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27796978/metal-bioaccumulation-in-two-edible-cephalopods-in-the-gulf-of-gabes-south-eastern-tunisia-environmental-and-human-health-risk-assessment
#9
Lotfi Rabaoui, Radhouan El Zrelli, Rafik Balti, Lamjed Mansour, Pierre Courjault-Radé, Nabil Daghbouj, Sabiha Tlig-Zouari
Samples of Octopus vulgaris and Sepia officinalis were collected from four areas in the Gulf of Gabes, south-eastern Tunisia, and their edible tissues (mantle and arms) were analyzed for cadmium, copper, mercury, and zinc. While the concentrations of metals showed significant differences between the sampling sites, no differences were revealed between the tissues of the two species. The spatial distribution of metals analyzed showed similar pattern for both tissues of the two species, with the highest concentrations found in the central area of Gabes Gulf, and the lowest in the northern and/or southern areas...
January 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27733834/neuroendocrine-immune-systems-response-to-environmental-stressors-in-the-cephalopod-octopus-vulgaris
#10
REVIEW
Anna Di Cosmo, Gianluca Polese
Under a continuous changing environment, animals are challenged with stresses and stimuli which demanding adaptation at behavioral and physiological levels. The adaptation strategies are finely regulated by animal nervous, endocrine, and immune systems. Although it's been established by now the usage of integrative approach to the study the endocrine and nervous systems (neuroendocrine), yet our understanding of how they cooperate with the immune system remains far from complete. The possible role that immune system plays as a component of the network has only been recognized recently...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27708680/the-cephalopod-arm-crown-appendage-formation-and-differentiation-in-the-hawaiian-bobtail-squid-euprymna-scolopes
#11
Marie-Therese Nödl, Alexandra Kerbl, Manfred G Walzl, Gerd B Müller, Heinz Gert de Couet
BACKGROUND: Cephalopods are a highly derived class of molluscs that adapted their body plan to a more active and predatory lifestyle. One intriguing adaptation is the modification of the ventral foot to form a bilaterally symmetric arm crown, which constitutes a true morphological novelty in evolution. In addition, this structure shows many diversifications within the class of cephalopods and therefore offers an interesting opportunity to study the molecular underpinnings of the emergence of phenotypic novelties and their diversification...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27499004/structure-of-a-highly-active-cephalopod-s-crystallin-mutant-new-molecular-evidence-for-evolution-from-an-active-enzyme-into-lens-refractive-protein
#12
Wei-Hung Tan, Shu-Chun Cheng, Yu-Tung Liu, Cheng-Guo Wu, Min-Han Lin, Chiao-Che Chen, Chao-Hsiung Lin, Chi-Yuan Chou
Crystallins are found widely in animal lenses and have important functions due to their refractive properties. In the coleoid cephalopods, a lens with a graded refractive index provides good vision and is required for survival. Cephalopod S-crystallin is thought to have evolved from glutathione S-transferase (GST) with various homologs differentially expressed in the lens. However, there is no direct structural information that helps to delineate the mechanisms by which S-crystallin could have evolved. Here we report the structural and biochemical characterization of novel S-crystallin-glutathione complex...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27267253/composition-and-metabolism-of-phospholipids-in-octopus-vulgaris-and-sepia-officinalis-hatchlings
#13
Diana B Reis, Nieves G Acosta, Eduardo Almansa, Douglas R Tocher, José P Andrade, António V Sykes, Covadonga Rodríguez
The objective of the present study was to characterise the fatty acid (FA) profiles of the major phospholipids, of Octopus vulgaris and Sepia officinalis hatchlings, namely phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylinositol (PI) and phosphatidylethanolamine (PE); and to evaluate the capability of both cephalopod species on dietary phospholipid remodelling. Thus, O. vulgaris and S. officinalis hatchlings were in vivo incubated with 0.3μM of L-∝-1-palmitoyl-2-[1-(14)C]arachidonyl-PC or L-∝-1-palmitoyl-2-[1-(14)C]arachidonyl-PE...
October 2016: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/27267177/selection-of-reliable-reference-genes-for-rt-qpcr-studies-in-octopus-vulgaris-paralarvae-during-development-and-immune-stimulation
#14
P García-Fernández, S Castellanos-Martínez, J Iglesias, J J Otero, C Gestal
The common octopus, Octopus vulgaris is a new candidate species for aquaculture. However, rearing of octopus paralarvae is hampered by high mortality and poor growth rates that impede its entire culture. The study of genes involved in the octopus development and immune response capability could help to understand the key of paralarvae survival and thus, to complete the octopus life cycle. Quantitative real-time PCR (RT-qPCR) is the most frequently tool used to quantify the gene expression because of specificity and sensitivity...
July 2016: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/27076436/cloning-characterization-and-expression-profile-of-estrogen-receptor-in-common-chinese-cuttlefish-sepiella-japonica
#15
Zhen-Ming Lü, Wan Liu, Li-Qin Liu, Tian-Ming Wang, Hui-Lai Shi, Hong-Ling Ping, Chang-Feng Chi, Jing-Wen Yang, Chang-Wen Wu
Sex steroid hormones are widely detected in molluscs and play important roles in sex determination, gonadal tissue maturation, and gametogenesis. Nevertheless, the signaling pathways of sex steroids in cephalopod have not yet been clearly elucidated. In the present study, a full-length sequence encoding the estrogen receptor (ER) was isolated from common Chinese cuttlefish, Sepiella japonica. The sjER cDNA clone was found to contain 1,788 nucleotides including a 1,470 bp open reading frame encoding 489 amino acid (aa) residues...
March 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/27069253/olfactory-organ-of-octopus-vulgaris-morphology-plasticity-turnover-and-sensory-characterization
#16
Gianluca Polese, Carla Bertapelle, Anna Di Cosmo
The cephalopod olfactory organ was described for the first time in 1844 by von Kölliker, who was attracted to the pair of small pits of ciliated cells on each side of the head, below the eyes close to the mantle edge, in both octopuses and squids. Several functional studies have been conducted on decapods but very little is known about octopods. The morphology of the octopus olfactory system has been studied, but only to a limited extent on post-hatching specimens, and the only paper on adult octopus gives a minimal description of the olfactory organ...
2016: Biology Open
https://www.readbyqxmd.com/read/27030809/mechanisms-of-wound-closure-following-acute-arm-injury-in-octopus-vulgaris
#17
Tanya J Shaw, Molly Osborne, Giovanna Ponte, Graziano Fiorito, Paul L R Andrews
BACKGROUND: Octopoda utilise their arms for a diverse range of functions, including locomotion, hunting, defence, exploration, reproduction, and grooming. However the natural environment contains numerous threats to the integrity of arms, including predators and prey during capture. Impressively, octopoda are able to close open wounds in an aquatic environment and can fully regenerate arms. The regrowth phase of cephalopod arm regeneration has been grossly described; however, there is little information about the acute local response that occurs following an amputation injury comparable to that which frequently occurs in the wild...
2016: Zoological Letters
https://www.readbyqxmd.com/read/27003439/pull-or-push-octopuses-solve-a-puzzle-problem
#18
Jonas N Richter, Binyamin Hochner, Michael J Kuba
Octopuses have large brains and exhibit complex behaviors, but relatively little is known about their cognitive abilities. Here we present data from a five-level learning and problem-solving experiment. Seven octopuses (Octopus vulgaris) were first trained to open an L shaped container to retrieve food (level 0). After learning the initial task all animals followed the same experimental protocol, first they had to retrieve this L shaped container, presented at the same orientation, through a tight fitting hole in a clear Perspex partition (level 1)...
2016: PloS One
https://www.readbyqxmd.com/read/26995720/molecular-identification-of-anisakis-and-hysterothylacium-larvae-in-commercial-cephalopods-from-the-spanish-mediterranean-coast
#19
Gabriela Picó-Durán, Lorena Pulleiro-Potel, Elvira Abollo, Santiago Pascual, Pilar Muñoz
This study aims to investigate the occurrence of nematode larvae in commercial cephalopods in the Western Mediterranean Sea. A total of 202 animals comprising 123 broadtail shortfin squid (Illex coindetii), 34 European squid (Loligo vulgaris) and 45 common octopus (Octopus vulgaris) were examined using enzymatic digestion. A total of 31 larvae were isolated (prevalence: 14.6%) and identified using molecular analyses which included PCR and sequencing of the ITS (ITS1-5.8S rDNA-ITS2) region. Phylogenetic tree inferred from ITS sequences yielded supported relationships for Anisakis (P: 12...
April 15, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/26881847/octopus-vulgaris-cuvier-1797-in-the-mediterranean-sea-genetic-diversity-and-population-structure
#20
Daniele De Luca, Gaetano Catanese, Gabriele Procaccini, Graziano Fiorito
The common octopus, Octopus vulgaris Cuvier 1797, is a largely exploited cephalopod species in the Mediterranean Sea and the Atlantic Ocean, as well as along the coasts of Africa, Brazil and Japan, where its taxonomic identity is still debated. The assessment of its genetic structure is a pressing need to correctly manage the resource and to avoid overfishing and collapsing of local stocks. Here we analysed genetic variation and population structure of O. vulgaris using thirteen microsatellite loci in seven sampling localities from the Mediterranean Sea and one from the Atlantic Ocean...
2016: PloS One
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