Biology, ecology and management perspectives of overexploited deposit-feeders sea cucumbers, with focus on Holothuria tubulosa (Gmelin, 1788)

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Viviana Pasquini ◽  
Ambra Angelica Giglioli ◽  
Antonio Pusceddu ◽  
Pierantonio Addis
Keyword(s):  
Apostichopus Japonicus ◽  
Target Species ◽  
Mediterranean Species ◽  
Sea Cucumbers ◽  
Ideal Candidate ◽  
Deposit Feeders ◽  
The Mediterranean ◽  
Available Information ◽  
Continuous Demand ◽  
Pacific Species

The increasing harvesting of low trophic level organisms is rising concern about the possible consequences on the ecosystem functioning. In particular, the continuous demand of sea cucumbers from the international market lead to the overexploitation of either traditionally harvested and new target species, including the Mediterranean ones. Sea cucumbers are mostly deposit feeders able to consume sedimentary organic matter and, thus, are ideal candidate for the remediation of eutrophicated sediments, like those beneath aquaculture plants. Breeding and restocking of overexploited sea cucumbers populations are well established practice for Indo-Pacific species like Holothuria scabra and Apostichopus japonicus. Some attempts have been also made for the Mediterranean species Holothuria tubulosa, but, so far, the adaptation of protocols used for other species presented several issues. We here summarize narratively the available information about sea cucumbers rearing protocols with the aim of identifying their major flaws and gaps of knowledge and fostering research about new triggers for spawning and feasible protocols to reduce the high mortality of post-settlers.

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.

Effect of moisture status on the stability of thermal gels from the body wall of sea cucumbers ( Apostichopus japonicus )

LWT ◽  
2016 ◽  
Vol 74 ◽  
pp. 294-302 ◽  
Author(s):  
Yan Zhang ◽  
Hu Hou ◽  
Yan Fan ◽  
Fangfang Zhang ◽  
Bafang Li ◽  
...  
Keyword(s):  
Body Wall ◽  
Apostichopus Japonicus ◽  
The Body ◽  
Sea Cucumbers ◽  
Effect Of Moisture ◽  
The Stability

The southern Palearctic genus Enneastigma Stein (Diptera: Anthomyiidae): Taxonomy of Mediterranean species, phylogeny and ancestral areas analysis

1994 ◽  
Vol 25 (4) ◽  
pp. 361-375 ◽  
Author(s):  
Verner Michelsen
Keyword(s):  
Cladistic Analysis ◽  
Alternative Methods ◽  
Mediterranean Species ◽  
Species Phylogeny ◽  
Males And Females ◽  
The Mediterranean ◽  
Small Genus

AbstractEnneastigma is a small genus of myopinine anthomyiids which comprises five species in the Mediterranean subregion (E. compressum Stein, E. rarum sp. n., E. rufitibia sp. n., E. triplex Loew, E. triseriatum Stein) and two species in SE Palearctic part of China (E. pilosiventrosum Fan & Chen, E. shanghaiensis Fan & Chen). All species appear to be univoltine and only active during the cooler parts of the season. The larvae may all be coprophagous. The Mediterranean species are revised with keys to males and females and illustrated descriptions of males, females and eggs. One lectotype is designated. A cladistic analysis was conducted which also included the Chinese species. This resulted in a single, most parsimonious phylogeny. The resulting area cladogram was used to assess the alternative methods for estimating ancestral areas as proposed recently by K. Bremer and F. Ronquist. It is concluded that the best results are obtained by using a refined Ronquist analysis.

scholarly journals Developing Foram-AMBI for biomonitoring in the Mediterranean: Species assignments to ecological categories

2018 ◽  
Vol 140 ◽  
pp. 33-45 ◽  
Author(s):  
Frans Jorissen ◽  
Maria Pia Nardelli ◽  
Ahuva Almogi-Labin ◽  
Christine Barras ◽  
Luisa Bergamin ◽  
...  
Keyword(s):  
Mediterranean Species ◽  
The Mediterranean

Different light and temperature requirements for survival and growth in three species of Kallymeniaceae (Rhodophyta) from the Mediterranean Sea

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Conxi Rodríguez-Prieto
Keyword(s):  
Laboratory Experiments ◽  
Culture Conditions ◽  
Initial Surface ◽  
Target Species ◽  
Strong Decrease ◽  
Maximum Value ◽  
Determining Factors ◽  
Temperature Requirements ◽  
Survival And Growth ◽  
The Mediterranean

Abstract Laboratory experiments have shown that light and temperature requirements are critical determining factors for thallus survival and growth of three Mediterranean Kallymeniaceae (Rhodophyta): Verlaquea lacerata, Croisettea requienii, and Meredithia microphylla, and explain their current bathymetric and habitat distribution. Verlaquea lacerata is annual and survived more than 1.5 years in culture, while C. requienii and M. microphylla are perennial and survived more than four and nine years in culture, respectively. The maximum survival was observed at 20–50 µmol photon m−2 s−1 and 10 and 12 °C within an 8:16 h light:dark regime for the three species, while a strong decrease in survival was observed at temperatures of 24 and 26 °C, indicating a weak tolerance to warming temperatures in the Mediterranean. The maximum value of the rate of daily marginal extension per initial surface area was similar in the three species: 0.017 day−1 for V. lacerata (10 °C/8:16 h light:dark regime/10 µmol photon m−2 s−1), 0.021 day−1 for C. requienii (18 °C/14:10 h light:dark regime/10 µmol photon m−2 s−1), and 0.017 day−1 for M. microphylla (12 °C/8:16 h light:dark regime/20 µmol photon m−2 s−1). The experiments permitted the establishment of culture conditions for the target species, and the successful culture of marginal fragments indicates the possibility of indefinitely maintaining the species in the laboratory for bioconservation purposes.

scholarly journals Description of Chone usticensis sp. nov. (Polychaeta, Sabellidae) from the Mediterranean Sea

Zootaxa ◽  
2006 ◽  
Vol 1168 (1) ◽  
pp. 51 ◽  
Author(s):  
ADRIANA GIANGRANDE ◽  
MARGHERITA LICCIANO ◽  
LUCA CASTRIOTA
Keyword(s):  
New Species ◽  
Mediterranean Sea ◽  
Mediterranean Species ◽  
The Mediterranean ◽  
A New Species

A new species of Chone (Sabellidae) from the coast of Ustica Island (Mediterranean Sea, north of Sicily) is described. The species, named Chone usticensis sp. nov., is similar to another Mediterranean species, C. filicaudata, in having a long pygidial filiform appendage, but is distinct from this species especially in the peristomium, collar, and in thoracic paleate chaetae shape. A discussion on the presence of the radiolar appendages within the genus Chone is also given.

scholarly journals Acalyptris Meyrick: revision of the platani and staticis groups in Europe and the Mediterranean (Lepidoptera: Nepticulidae)

Zootaxa ◽  
2007 ◽  
Vol 1436 (1) ◽  
pp. 1 ◽  
Author(s):  
ERIK J. VAN NIEUKERKEN
Keyword(s):  
New Species ◽  
Dna Sequences ◽  
Mediterranean Species ◽  
Mt Dna ◽  
Pupal Exuviae ◽  
European Species ◽  
Group A ◽  
The Mediterranean ◽  
Three New Species

The European and Mediterranean species of the Acalyptris platani and A. staticis groups are revised, with respectively four and six species. Three new species are described: A. pistaciae Van Nieukerken sp. n. (from Greece, Cyprus and Turkey, on Pistacia) in the platani group, A. limoniastri Van Nieukerken sp. n. (from Algeria and Tunisia, associated with Limoniastrum) and A. lesbia Van Nieukerken & Hull sp. n. (from Greece: Lesvos, on Limonium gmelini) in the staticis group. Lectotypes are selected for A. minimella (Rebel, 1924) and A. staticis (Walsingham, 1908). The European species of the A. platani group are leafminers on Anacardiaceae, Platanaceae and Loranthaceae, the species of the A. staticis group feed on Plumbaginaceae, except A. pyrenaica A. & Z. Laštůvka, for which the host is unknown, but likely to belong to another family. Immatures are described for five species, final instar larvae and pupal exuviae for all species in the A. platani group and for A. lesbia. Larvae and pupae of the latter species differ markedly from the A. platani group. Recorded parasitoids are listed. CO1 barcodes are provided for seven species. The groups are phylogenetically not very close; the monophyly of Acalyptris and the phylogeny on the basis of CO1 (mt-DNA) sequences are discussed.

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