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Octopus vulgaris

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https://www.readbyqxmd.com/read/29089836/three-new-species-of-heteromysis-mysida-mysidae-heteromysini-from-the-cape-peninsula-south-africa-with-first-documentation-of-a-mysid-cephalopod-association
#1
Karl J Wittmann, Charles L Griffiths
Faunistic studies in sublittoral and littoral marine habitats on the Cape Peninsula, South Africa, have yielded three new species belonging to the genus Heteromysis, subgenus Heteromysis: H. cancellisp. n. associated with the diogenid hermit crab Cancellus macrothrix Stebbing, 1924, and H. fosterisp. n. extracted from 'empty' urchin and gastropod shells. The first documented mysid-cephalopod association is reported for H. octopodissp. n. which was found in dens occupied by Octopus vulgaris Cuvier, 1797, but was also captured from tide pools...
2017: ZooKeys
https://www.readbyqxmd.com/read/29046051/characterization-of-the-skin-mucus-in-the-common-octopus-octopus-vulgaris-cuvier-reared-paralarvae
#2
Gianluca Accogli, Giovanni Scillitani, Donatella Mentino, Salvatore Desantis
The Octopus vulgaris farming is impaired by the high mortality of the paralarvae during the first month of life. Several factors have been investigated in this regard, but no data exist on the body surface mucus, which represents the interface with the outside environment. This study included morphometric analysis and glycoconjugates characterization of skin mucus in reared Octopus vulgaris paralarvae during the first month of life. Four types of mucous cells were distinguished:  mucous 1 (m1) and mucous 2 (m2) cells were scattered in the mantle epidermis, mucous 3 (m3) and mucous 4 (m4) in the epithelium surrounding the sucker...
September 12, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29017074/morphological-and-molecular-characterization-of-aggregata-spp-frenzel-1885-apicomplexa-aggregatidae-in-octopus-vulgaris-cuvier-1797-mollusca-cephalopoda-from-central-mediterranean
#3
Perla Tedesco, Camino Gestal, Kristina Begić, Ivona Mladineo, Sheila Castellanos-Martínez, Gaetano Catanese, Antonio Terlizzi, Graziano Fiorito
Coccidian parasites of the genus Aggregata are known to parasitize cephalopods as definitive hosts, however one of the genus members, A. octopiana, has shown an unresolved phylogeny within the same definitive host, the common octopus (Octopus vulgaris). Our study represents a large-scale investigation aimed at characterizing morphological traits and phylogeny of A. octopiana isolated from O. vulgaris inhabiting three distinct geographic areas of the central Mediterranean: The Adriatic, Ionian and Tyrrhenian Seas...
September 11, 2017: Protist
https://www.readbyqxmd.com/read/28860996/prey-capture-ingestion-and-digestion-dynamics-of-octopus-vulgaris-paralarvae-fed-live-zooplankton
#4
Manuel Nande, Pablo Presa, Álvaro Roura, Paul L R Andrews, Montse Pérez
Octopus vulgaris is a species of great interest in research areas such as neurobiology, ethology, and ecology but also a candidate species for aquaculture as a food resource and for alleviating the fishing pressure on its wild populations. This study aimed to characterize the predatory behavior of O. vulgaris paralarvae and to quantify their digestive activity. Those processes were affordable using the video-recording analysis of 3 days post-hatching (dph), mantle-transparent paralarvae feeding on 18 types of live zooplanktonic prey...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28790921/fatty-acid-profile-of-neutral-and-polar-lipid-fraction-of-wild-eggs-and-hatchlings-from-wild-and-captive-reared-broodstock-of-octopus-vulgaris
#5
Juan Estefanell, Antonio Mesa-Rodríguez, Besay Ramírez, Antonio La Barbera, Juan Socorro, Carmen María Hernandez-Cruz, María Soledad Izquierdo
The culture of Octopus vulgaris is constrained by unsolved problems in paralarvae rearing, mainly associated to the unknown nutritional requirements of this species in early stages. In this article we studied the fatty acid profile (total, neutral, and polar lipid fractions) in wild eggs and wild hatchlings, collected in Gran Canaria (SW) (Spain) with artificial dens, in comparison to hatchlings obtained in captivity from broodstock fed on trash fish species. Total lipids were 11.5-13.5% dw, with the polar fraction representing a 70...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28769814/the-digestive-tract-of-cephalopods-a-neglected-topic-of-relevance-to-animal-welfare-in-the-laboratory-and-aquaculture
#6
REVIEW
António V Sykes, Eduardo Almansa, Gavan M Cooke, Giovanna Ponte, Paul L R Andrews
Maintenance of health and welfare of a cephalopod is essential whether it is in a research, aquaculture or public display. The inclusion of cephalopods in the European Union legislation (Directive 2010/63/EU) regulating the use of animals for scientific purposes has prompted detailed consideration and review of all aspects of the care and welfare of cephalopods in the laboratory but the information generated will be of utility in other settings. We overview a wide range of topics of relevance to cephalopod digestive tract physiology and their relationship to the health and welfare of these animals...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28769811/feeding-relationship-between-octopus-vulgaris-cuvier-1797-early-life-cycle-stages-and-their-prey-in-the-western-iberian-upwelling-system-correlation-of-reciprocal-lipid-and-fatty-acid-contents
#7
Sílvia Lourenço, Álvaro Roura, María-José Fernández-Reiriz, Luís Narciso, Ángel F González
Under the influence of the Western Iberian upwelling system, the Iberian Atlantic coast holds important hatcheries and recruitment areas for Octopus vulgaris. Recently identified as an octopus hatchery, the Ría de Vigo harbors an important mesozooplankton community that supports O. vulgaris paralarvae during the first days of their planktonic stage. This study represents a preliminary approach to determine the nutritional link between wild O. vulgaris hatchlings, paralarvae and their zooplankton prey in the Ría de Vigo, by analyzing their lipid class content and fatty acid profiles...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28767049/learning-dynamic-models-for-open-loop-predictive-control-of-soft-robotic-manipulators
#8
Thomas George Thuruthel, Egidio Falotico, Federico Renda, Cecilia Laschi
The soft capabilities of biological appendages like the arms of Octopus vulgaris and elephants' trunks have inspired roboticists to develop their robotic equivalents. Although there have been considerable efforts to replicate their morphology and behavior patterns, we are still lagging behind in replicating the dexterity and efficiency of these biological systems. This is mostly due to the lack of development and application of dynamic controllers on these robots which could exploit the morphological properties that a soft-bodied manipulator possesses...
October 16, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28751029/spatial-distribution-of-marine-debris-on-the-seafloor-of-moroccan-waters
#9
S Loulad, R Houssa, H Rhinane, A Boumaaz, A Benazzouz
Marine debris pollution is considered as a worldwide problem and a direct threat to the environment, economy and human health. In this paper, we provide the first quantitative assessment of debris on the seafloor of the southern part of the economic exclusive waters of Morocco. The data were collected in a scientific trawl survey carried out from 5 to 25 October 2014 between (26N) to (21N) covering different stratums of depths (from 10 to 266m) and following a sampling network of 100 stations distributed randomly in the study area...
July 24, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28725198/3d-reconstruction-of-the-digestive-system-in-octopus-vulgaris-cuvier-1797-embryos-and-paralarvae-during-the-first-month-of-life
#10
Raquel Fernández-Gago, Martin Heß, Heidemarie Gensler, Francisco Rocha
Octopus vulgaris aquaculture is limited due to poor biological knowledge of the paralarval stages (e.g., digestive system functionality), their nutritional requirements (e.g., adequate live diet) and standardization of rearing techniques. These factors are important in explaining the high mortality rate observed in this developmental stage under culture conditions. For a better understanding of nutrition biology of this species, we investigated the 3D microanatomy of the digestive tract of the embryo and paralarvae during the first month of life...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28670288/time-course-of-metabolic-capacities-in-paralarvae-of-the-common-octopus-octopus-vulgaris-in-the-first-stages-of-life-searching-biomarkers-of-nutritional-imbalance
#11
Amalia E Morales, Gabriel Cardenete, M Carmen Hidalgo, Diego Garrido, M Virginia Martín, Eduardo Almansa
The culture of the common octopus (Octopus vulgaris) is promising since the species has a relatively short lifecycle, rapid growth, and high food conversion ratios. However, recent attempts at successful paralarvae culture have failed due to slow growth and high mortality rates. Establishing an optimal nutritional regime for the paralarvae seems to be the impeding step in successful culture methods. Gaining a thorough knowledge of food regulation and assimilation is essential for paralarvae survival and longevity under culture conditions...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620315/you-are-what-you-eat-a-genomic-analysis-of-the-gut-microbiome-of-captive-and-wild-octopus-vulgaris-paralarvae-and-their-zooplankton-prey
#12
Álvaro Roura, Stephen R Doyle, Manuel Nande, Jan M Strugnell
The common octopus (Octopus vulgaris) is an attractive species for aquaculture, however, several challenges inhibit sustainable commercial production. Little is known about the early paralarval stages in the wild, including diet and intestinal microbiota, which likely play a significant role in development and vitality of this important life stage. High throughput sequencing was used to characterize the gastrointestinal microbiome of wild O. vulgaris paralarvae collected from two different upwelling regions off the coast of North West Spain (n = 41) and Morocco (n = 35)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620313/digestive-physiology-of-octopus-maya-and-o-mimus-temporality-of-digestion-and-assimilation-processes
#13
REVIEW
Pedro Gallardo, Alberto Olivares, Rosario Martínez-Yáñez, Claudia Caamal-Monsreal, Pedro M Domingues, Maite Mascaró, Ariadna Sánchez, Cristina Pascual, Carlos Rosas
Digestive physiology is one of the bottlenecks of octopus aquaculture. Although, there are successful experimentally formulated feeds, knowledge of the digestive physiology of cephalopods is fragmented, and focused mainly on Octopus vulgaris. Considering that the digestive physiology could vary in tropical and sub-tropical species through temperature modulations of the digestive dynamics and nutritional requirements of different organisms, the present review was focused on the digestive physiology timing of Octopus maya and Octopus mimus, two promising aquaculture species living in tropical (22-30°C) and sub-tropical (15-24°C) ecosystems, respectively...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28608484/control-of-abusive-water-addition-to-octopus-vulgaris-with-non-destructive-methods
#14
Rogério Mendes, Ove Schimmer, Helena Vieira, João Pereira, Bárbara Teixeira
BACKGROUND: Abusive water addition to octopus has evidenced the need for quick non-destructive methods for product qualification in the industry and control of fresh commercial products in markets. Electric conductivity (EC)/pH and dielectric property measurements were selected to detect water uptake in octopus. RESULTS: A significant EC decrease was determined after soaking octopus in freshwater for 4 h. EC reflected the water uptake of octopus and the correspondent concentration decrease of available ions in the interstitial fluid...
June 12, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28596735/diet-composition-and-variability-of-wild-octopus-vulgaris-and-alloteuthis-media-cephalopoda-paralarvae-a-metagenomic-approach
#15
Lorena Olmos-Pérez, Álvaro Roura, Graham J Pierce, Stéphane Boyer, Ángel F González
The high mortality of cephalopod early stages is the main bottleneck to grow them from paralarvae to adults in culture conditions, probably because the inadequacy of the diet that results in malnutrition. Since visual analysis of digestive tract contents of paralarvae provides little evidence of diet composition, the use of molecular tools, particularly next generation sequencing (NGS) platforms, offers an alternative to understand prey preferences and nutrient requirements of wild paralarvae. In this work, we aimed to determine the diet of paralarvae of the loliginid squid Alloteuthis media and to enhance the knowledge of the diet of recently hatched Octopus vulgaris paralarvae collected in different areas and seasons in an upwelling area (NW Spain)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28567020/dietary-effect-on-the-proteome-of-the-common-octopus-octopus-vulgaris-paralarvae
#16
Inmaculada Varó, Gabriel Cardenete, Francisco Hontoria, Óscar Monroig, José Iglesias, Juan J Otero, Eduardo Almansa, Juan C Navarro
Nowadays, the common octopus (Octopus vulgaris) culture is hampered by massive mortalities occurring during early life-cycle stages (paralarvae). Despite the causes of the high paralarvae mortality are not yet well-defined and understood, the nutritional stress caused by inadequate diets is pointed out as one of the main factors. In this study, the effects of diet on paralarvae is analyzed through a proteomic approach, to search for novel biomarkers of nutritional stress. A total of 43 proteins showing differential expression in the different conditions studied have been identified...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28559849/epigenetic-dna-methylation-mediating-octopus-vulgaris-early-development-effect-of-essential-fatty-acids-enriched-diet
#17
Pablo García-Fernández, Danie García-Souto, Eduardo Almansa, Paloma Morán, Camino Gestal
The common octopus, Octopus vulgaris, is a good candidate for aquaculture but a sustainable production is still unviable due to an almost total mortality during the paralarvae stage. DNA methylation regulates gene expression in the eukaryotic genome, and has been shown to exhibit plasticity throughout O. vulgaris life cycle, changing profiles from paralarvae to adult stages. This pattern of methylation could be sensitive to small alterations in nutritional and environmental conditions during the species early development, thus impacting on its health, growth and survival...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28559603/octopus-vulgaris-protein-hydrolysates-characterization-antioxidant-and-functional-properties
#18
Rabeb Ben Slama-Ben Salem, Intidhar Bkhairia, Ola Abdelhedi, Moncef Nasri
Composition, functional properties and in vitro antioxidant activities of octopus (Octopus vulgaris) protein hydrolysates (OPHs) were evaluated. OPHs were prepared by treatment with commercial Esperase (OPH-Esp), alkaline protease extract from Zebra blenny (Salaria basilica) (OPH-ZB) and enzyme preparation from Bacillus subtilis A26 (OPH-A26). OPHs showed different degrees of hydrolysis (DH from 17.6 to 21%), and hydrophobic/hydrophilic peptide ratio. The amino acid profiles of OPHs showed a high level of essential amino acids, and Lys was the most abundant amino acid...
May 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28555185/molecular-determinants-of-cephalopod-muscles-and-their-implication-in-muscle-regeneration
#19
REVIEW
Letizia Zullo, Sara M Fossati, Pamela Imperadore, Marie-Therese Nödl
The ability to regenerate whole-body structures has been studied for many decades and is of particular interest for stem cell research due to its therapeutic potential. Several vertebrate and invertebrate species have been used as model systems to study pathways involved in regeneration in the past. Among invertebrates, cephalopods are considered as highly evolved organisms, which exhibit elaborate behavioral characteristics when compared to other mollusks including active predation, extraordinary manipulation, and learning abilities...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28425503/nerve-degeneration-and-regeneration-in-the-cephalopod-mollusc-octopus-vulgaris-the-case-of-the-pallial-nerve
#20
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
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