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Environmentally driven synchronies of Mediterranean cephalopod populations ArchiMer
Keller, Stefanie; Quetglas, Antoni; Puerta, Patricia; Bitetto, Isabella; Casciaro, Loredana; Cuccu, Danila; Esteban, Antonio; Garcia, Cristina; Garofalo, Germana; Guijarro, Beatriz; Josephides, Marios; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Manfredi, Chiara; Marceta, Bojan; Micallef, Reno; Peristeraki, Panagiota; Relini, Giulio; Sartor, Paolo; Spedicato, Maria Teresa; Tserpes, George; Hidalgo, Manuel.
The Mediterranean Sea is characterized by large scale gradients of temperature, productivity and salinity, in addition to pronounced mesoscale differences. Such a heterogeneous system is expected to shape the population dynamics of marine species. On the other hand, prevailing environmental and climatic conditions at whole basin scale may force spatially distant populations to fluctuate in synchrony. Cephalopods are excellent case studies to test these hypotheses owing to their high sensitivity to environmental conditions. Data of two cephalopod species with contrasting life histories (benthic octopus vs nectobenthic squid), obtained from scientific surveys carried out throughout the Mediterranean during the last 20 years were analyzed. The objectives of...
Tipo: Text Palavras-chave: Cephalopods; Mediterranean; MEDITS; Dynamic factor analysis; Synchrony; Octopus vulgaris; Illex coindetii.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00371/48207/48320.pdf
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First detection of OsHV-1 in the cephalopod Octopus vulgaris. Is the octopus a dead-end for OsHV-1? ArchiMer
Prado-alvarez, Maria; García-fernández, Pablo; Faury, Nicole; Azevedo, Carlos; Morga, Benjamin; Gestal, Camino.
The ostreid herpes virus (OsHV-1), associated with massive mortalities in the bivalve Crassostrea gigas, was detected for the first time in the cephalopod Octopus vulgaris. Wild adult animals from a natural breeding area in Spain showed an overall prevalence of detection of 87.5% between 2010 and 2015 suggesting an environmental source of viral material uptake. Overall positive PCR detections were significantly higher in adult animals (p = 0.031) compared to newly hatched paralarvae (62%). Prevalence in embryos reached 65%. Sequencing of positive amplicons revealed a match with the variant OsHV-1 µVar showing the genomic features that distinguish this variant in the ORF4. Gill tissues from adult animals were also processed for in situ hybridization and...
Tipo: Text Palavras-chave: Octopus vulgaris; Crassostrea gigas; OsHV-1; Gene expression; In situ hybridization.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00680/79201/81700.pdf
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Biologie et exploitation du poulpe Octopus vulgaris (Cuvier, 1797) des côtes mauritaniennes OceanDocs
Dia, M.A..
L’étude porte sur l’exploitation, la biologie et la dynamique du poulpe (Octopus vulgaris, Cuvier) des eaux mauritaniennes. La répartition spatio-temporelle dans la région du Cap Blanc ne semble être liée ni à la taille, ni au sexe, mais varie au cours de l’année. L’analyse de l’état actuel de la pêcherie basée sur les congélateurs céphalopodiers met en évidence une augmentation de l’effort de pêche et la poursuite de chute des p.u.e. La composition des captures révèle une progression du pourcentage des individus de poids inférieur à 200 grammes (« poulpo »). L’étude biologique montre qu’il existe deux saisons de reproduction par an (mai-juillet et septembre-novembre) qui engendrent deux recrutements, l’un en mai et l’autre à partir de septembre. La...
Tipo: Theses and Dissertations Palavras-chave: Reproduction; Common octopus; Population dynamics; Environnement; Dynamique de population; Exploitation; Environment; Poulpe; ZEE Mauritanienne; Distribution; Mauritanian EEZ; Biologie; Croissance; Growth; Octopus vulgaris; Biology; Octopus fisheries.
Ano: 1988 URL: http://hdl.handle.net/1834/675
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