Function of the Gravity Receptor of Octopus vulgaris

Nature ◽  
1970 ◽  
Vol 226 (5248) ◽  
pp. 864-865 ◽  
Author(s):  
HERMANN SCHÖNE ◽  
BERND-ULRICH BUDELMANN
Keyword(s):  
Octopus Vulgaris ◽  
Gravity Receptor

Comparison of individual rearing systems according to stocking density for octopus (Octopus vulgaris) grow-out in in-situ

2015 ◽  
Vol 8 (1) ◽  
pp. 27
Author(s):  
In-Yeong Kwon ◽  
Sun-Ju Moon ◽  
Hyo-Yeong Lee ◽  
De-Hyuk Park ◽  
Jun-Beom Seo ◽  
...  
Keyword(s):  
Stocking Density ◽  
Octopus Vulgaris

scholarly journals Protect the Natives to Combat the Aliens: Could Octopus vulgaris Cuvier, 1797 Be a Natural Agent for the Control of the Lionfish Invasion in the Mediterranean Sea?

2021 ◽  
Vol 9 (3) ◽  
pp. 308 ◽  
Author(s):  
Fabio Crocetta ◽  
Maria Shokouros-Oskarsson ◽  
Nikolaos Doumpas ◽  
Ioannis Giovos ◽  
Stefanos Kalogirou ◽  
...  
Keyword(s):  
Biological Invasions ◽  
Mediterranean Sea ◽  
Octopus Vulgaris ◽  
Major Threat ◽  
Global Biodiversity ◽  
The Mediterranean ◽  
Natural Agent

Biological invasions constitute a major threat to native ecosystems and to global biodiversity [...]

scholarly journals Pots as alternative and sustainable fishing gears in the Mediterranean Sea: an overview

2021 ◽  
Author(s):  
Andrea Petetta ◽  
Massimo Virgili ◽  
Stefano Guicciardi ◽  
Alessandro Lucchetti
Keyword(s):  
Mediterranean Sea ◽  
Early Stage ◽  
Spiny Lobster ◽  
Mesh Size ◽  
Octopus Vulgaris ◽  
Target Species ◽  
Factors Affecting ◽  
Fishing Gears ◽  
Pros And Cons ◽  
The Mediterranean

AbstractStock overexploitation, bycatch, discards and gear impacts on the environment are outstanding issues for Mediterranean fisheries. The adoption of alternative fishing gears is an appealing solution to ensure a more sustainable exploitation of resources. We discuss the pros and cons of pots as alternative gears by reviewing their main designs, spatial distribution and target species in the Mediterranean basin. We assessed the technical factors affecting the catch efficiency of the different pot designs for four target species: spiny lobster, Palinurus elephas; Norway lobster, Nephrops norvegicus; common octopus, Octopus vulgaris and pandalid shrimps, Plesionika spp. We found that pot volume is important to catch Octopus; mesh size to catch Nephrops and Plesionika; entrance surface to catch Octopus, Nephrops and Plesionika; pot shape/colour and entrance shape/position to catch Octopus and Plesionika; and bait type to catch Octopus and Nephrops. The literature review shows that pot fisheries have several considerable advantages over conventional gears, especially in terms of discards, bycatch, seabed impacts (particularly compared with bottom trawls and passive set nets), size and species selectivity, gear depredation, catch quality and gear cost, besides saving time and labour. Disadvantages hampering their wider diffusion include ghost fishing, a low catch of finfish species, the narrow range of species targeted by each pot design and the current early stage of research. These data make a clear case for using pots as alternative gears to traditional ones in the Mediterranean Sea in some areas and seasons to catch certain target species.

scholarly journals Seasonal population dynamics of Octopus vulgaris in the eastern Mediterranean

2006 ◽  
Vol 63 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Stelios Katsanevakis ◽  
George Verriopoulos
Keyword(s):  
Eastern Mediterranean ◽  
Late Summer ◽  
Main Peak ◽  
Octopus Vulgaris ◽  
Late Winter ◽  
Visual Census ◽  
The Common ◽  
Specific Growth Rates ◽  
Seasonal Population ◽  
Seasonal Population Dynamics

Abstract The population density of Octopus vulgaris was measured by visual census with scuba diving in coastal areas in Greece (eastern Mediterranean). A time-variant, stage-classified, matrix population model was developed to interpret the seasonal variation of octopus stage densities and to estimate several life cycle parameters. An annual and a semi-annual periodic cycle were found in the stage densities. A main peak of benthic settlement was observed during summer and a secondary, irregular one during late autumn. Two spawning peaks were estimated, a main one during late winter–spring and a secondary one during late summer–early autumn. More than 50% of the just-settled individuals will eventually die after 3 months. Mortality rate declines, as individuals grow larger, reaches a minimum approximately 6 months after settlement, and then grows again probably because of terminal spawning. The life expectancy of recently settled individuals (<50 g) during their summer peak is approximately 5 months. The lifespan of the common octopus is estimated to be between 12 and 15 months. The octopuses' mean specific growth rates (±s.d.) in their natural environment were 1.61 ± 0.30 d−1 for 50–200 g individuals and 1.19 ± 0.31 d−1 for 200–500 g individuals.

scholarly journals Phylogeography of the insular populations of common octopus, Octopus vulgaris Cuvier, 1797, in the Atlantic Macaronesia

PLoS ONE ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. e0230294 ◽  
Author(s):  
Javier Quinteiro ◽  
Jorge Rodríguez-Castro ◽  
Manuel Rey-Méndez ◽  
Nieves González-Henríquez
Keyword(s):  
Octopus Vulgaris ◽  
Common Octopus ◽  
Insular Populations
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