Distributional records of sea cucumbers (Echinodermata, Holothuroidea) based on the collection stored at the Italian National Antarctic Museum (MNA, section of Genoa)

Enregistrements de données

Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 328 enregistrements.

1 tableurs de données d'extension existent également. Un enregistrement d'extension fournit des informations supplémentaires sur un enregistrement du cœur de standard (core). Le nombre d'enregistrements dans chaque tableur de données d'extension est illustré ci-dessous.

Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.

Versions

Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.

Comment citer

Les chercheurs doivent citer cette ressource comme suit:

Guzzi A, Alvaro M C, Cecchetto M, Grillo M, Cometti V, Noli N, Schiaparelli S (2024). Distributional records of sea cucumbers (Echinodermata, Holothuroidea) based on the collection stored at the Italian National Antarctic Museum (MNA, section of Genoa). Version 1.4. Italian National Antarctic Museum (MNA, Section of Genoa). Occurrence dataset. https://ipt.biodiversity.aq/resource?r=mna_echinodermata_holothuroidea&v=1.4

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est Italian National Antarctic Museum (MNA, Section of Genoa). Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.

Enregistrement GBIF

Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 1dafb239-593d-43b0-a2a0-bd3e4bde1b23.  Italian National Antarctic Museum (MNA, Section of Genoa) publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du Scientific Committee on Antarctic Research.

Mots-clé

Occurrence; Specimen; ANTARCTICA; ITALIAN NATIONAL ANTARCTIC MUSEUM; ECHINODERMATA; HOLOTHUROIDEA; ROSS SEA; TERRA NOVA BAY; SOUTHERN OCEAN; BIODIVERSITY; OCCURRENCE

Contacts

Couverture géographique

The geographic extent of the dataset includes a large portion of the Ross Sea and different sampling stations located around the South Shetland Islands on the Antarctic Peninsula.

Couverture taxonomique

Holothuroidea specimens were identified to lower possible taxonomic resolution.

Couverture temporelle

Données sur le projet

The specimens were collected during 11 different Antarctic expeditions carried out from 1987 to 2017, one funded by the Alfred Wegener Institute (AWI) and ten by the Italian National Antarctic Research Program (PNRA) covering 29 years of research.

Méthodes d'échantillonnage

The dataset provides information on sea cucumbers (Holothuroidea) specimens collected from 1987 to 2017 and now part of the permanent biological collection at the Italian National Antarctic Museum (MNA) – Genoa section. The 328 samples composing this Database have been collected in a wide range of scientific projects with variety of scientific objectives employing a variety of sapling gears covering a total time interval of 30 years, for this reason the data presented here does not allow to provide a quantitative dataset but rather an occurrence resource for Antarctic holothuroids. Sampling was performed on a total of 89 different sampling stations (Fig. 1) through the deployment of a variety of sampling gears, mainly dredges whose specifications were often not properly described in the expedition’s reports (Charcot dredge, Naturalist dredge and Triangular dredge) and Van Veen grabs of different volumes. Other sampling instruments include two towed horizontal nets, one called “Small Hamburg Plankton Net” (Hydrobios, https://www.hydrobios.de/en/), used during the PNRA XXVIII expedition (2012/2013) and composed by a 1 m2 metallic frame opening and a nylon net of 2 mm of mesh size, and another one called “Multiple Net Mid-Water Tucker Trawl” (Aquatic Research Instruments, http://www.aquaticresearch.com/multi-net_mid_water_trawl.htm) used during the PNRA XXIX expedition (2013/2014) made of three different 900 μm mesh size nylon nets, each one attached to a different metallic frame of 1 m2 opening, which are opened sequentially at different depths. The “Agassiz trawl” employed during the PNRA XIX expedition (2003/2004) was made up of a rigid rectangular steel frame with an opening of about 120 cm in width and 50 cm in height and a bag made of sturdy polyamide yarn net with 8 mm side mesh. A second “Agassiz trawl” with a 3 m2 opening was used during the AWI ANT-XXIX/3 Expedition (2013). Some samples were also opportunistically collected by long fishing lines, mid water trawls (that touched the bottom due to a failure of the winches), trammel nets, and other fishing nets that provided additional material to standard techniques and a Van Veen grab of 65 L volume. During the PNRA XXV expedition (2009/2010) a few samples were hand-collected by SCUBA diving operations conducted by Stefano Schiaparelli at a maximum depth of 26 meters. A few occurrences listed in the data originate from samples acquired using uncommon methodologies for collection benthic sea cucumbers (e.g. gill nets, trammel nets) and some referred as samples obtained as by-catch from failed deployments. Most of the specimens were collected from the Terra Nova Bay area near the "Mario Zucchelli'' station using small boats and zodiacs, while a smaller number was collected from the Ross Sea using the R/V "Italica". The samples belonging to the AWI ANT-XXIX/3 Expedition (2013) were collected by Alvaro Maria Chiara on board the "Polarstern" Research Vessel from the Bransfield Strait and the South Shetland Islands (Antarctic Peninsula). Once the material has been acquired by the MNA after sorting and shipment activities, all the specimens were classified to the lowest possible taxonomic resolution. The present dataset has been formatted in order to fulfill the Darwin Core standard protocol required by the OBIS scheme (http://www.iobis.org/manual/lifewatchqc/) and according to the SCAR-MarBIN Data Toolkit (available at http://www.scarmarbin.be/documents/SM-FATv1.zip). Vouchers are now preserved in 90% ethanol (~56% of the entire collection), frozen (~43.5%), or in formalin (~0.3%).

Description des étapes de la méthode:

1. The data set provided in this publication is composed of occurrences originating from different expeditions and projects, the treatment and steps adopted to process each sample may differ depending on the expedition, the project and the personnel involved. However, in most cases, the samples were usually sorted in situ on the basis of morphological characteristics and stored directly in formalin or absolute ethanol, to be subsequently identified by researchers at the Italian National Antarctic Museum (MNA) – Genoa section after being acquired in the biological collection. The samples are now stored in absolute ethanol, fixed in formalin or at -20°C.
2. Most of the records have been identified by Stefano Schiaparelli and Alice Guzzi using original descriptions and taxonomic keys. Identification is made in most cases through scanning electron microscopic (SEM) analysis of the dermal ossicles of sea cucumbers. For ossicles extraction, small portions of tissue were taken from oral tentacles, body wall and tube feet (when available). Each portion was placed on a separate watch glass and covered with several drops of sodium hypochlorite solution (6-14% active chlorine) (liquid bleach). When the soft tissue was completely dissolved, the ossicles were cleaned with water, air dried, mounted on aluminum stubs, and coated with gold.
3. The identification of many specimens, corresponding to more than 47% of the entire dataset, was aided by the application of DNA barcoding analyses, including the amplification and sequencing of the cytochrome oxidase I (COI) region, in a collaboration with the Canadian Centre for DNA Barcoding (CCDB) and uploaded to the Barcode Of Life Data System (BOLD System). The results obtained in this context will be the subject of another publication.

Citations bibliographiques

1. Miller AK, Kerr AM, Paulay G, Reich M, Wilson NG, Carvajal JI, Rouse GW. (2017) Molecular phylogeny of extant Holothuroidea (Echinodermata). Molecular Phylogenetics and Evolution 111: 110–131. https://doi.org/10.1016/j.ympev.2017.02.014
2. WoRMS (2023) Holothuroidea. http://www.marinespecies.org/aphia.php?p=taxdetails&id=123083 [Accessed on 2023-02-10]
3. The Scientific Committee on Antarctic Research. (2023). SCAR Report 42 - September 2022 - SCAR Data Policy (2022). Zenodo. https://doi.org/10.5281/zenodo.7825314

Métadonnées additionnelles