Description
On behalf of SalMar Farming AS, Aqua Kompetanse AS has conducted a survey of vulnerable species and habitats in shallow waters (0–50 m) and deep waters (>50 m). The purpose of the survey is to identify the presence and observed density of vulnerable species that may form habitats listed on the Norwegian Red List for Ecosystems and Habitat Types (Artsdatabanken, 2018), on OSPAR’s list of threatened and/or declining habitats (OSPAR 2008-06, revised in 2021), and among the proposed management-relevant habitat types for fisheries and aquaculture (Institute of Marine Research Report, 2024-16). At depths greater than 50 meters, the focus is mainly on corals, sponges, and sea pens. However, other red-listed and/or vulnerable species that live in close interaction with the three-dimensional habitats formed by the aforementioned groups will also be described when relevant. At depths shallower than 50 meters, the survey includes kelp forests, soft-bottom shoreline areas, coarse substrate bottoms, marine seagrass beds, exposed blue mussel beds, oysters, scallop populations, corals, sponges, sea pens, and any other red-listed shallow-water species. The investigation is based on the Institute of Marine Research’s proposed methodology for surveying vulnerable species and habitats in deep water (>50 meters depth) in connection with applications for marine aquaculture (Kutti and Husa 2021).
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 1 100 enregistrements.
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:
Haddad C (2025). Mapping of vulnerable marine species and habitats, Sklinna in Leka. Version 1.0. Aqua Kompetanse. Occurrence dataset. https://ipt.gbif.no/resource?r=3053-3-24k&v=1.0
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est Aqua Kompetanse. 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 : d97a7efc-5979-4eae-a7ce-e82db98952d9. Aqua Kompetanse publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF Norway.
Mots-clé
Occurrence; Observation
Contacts
- Thorolv Kveldulvsons gt. 37A 8800 SANDNESSJØEN
- 46230330
https://orcid.org/https://orcid.org/0000-0002-7661-0580
- Environmental consultant/ marine biologist
Couverture géographique
Sklinna in Leka
| Enveloppe géographique | Sud Ouest [65,194, 11,555], Nord Est [65,213, 11,584] |
|---|
Couverture taxonomique
Occurrences are identified to the lowest possible level with current knowledge and technology.
| Kingdom | Animalia |
|---|---|
| Phylum | Porifera, Cnidaria |
| Class | Demospongiae, Hydrozoa, Anthozoa |
| Order | Anthoathecata, Pennatulacea |
| Family | Virgulariidae, Funiculinidae, Stylasteridae |
Couverture temporelle
| Epoque de formation | 02.05.2024 - 07.05.2024 - 08.05.2024 |
|---|
Méthodes d'échantillonnage
The survey was conducted on 08-09 and 11.04.2024. A total of 31 transects were mapped within the investigation area. These transects were designed by a consultant from Aqua Kompetanse AS based on the Institute of Marine Research's proposed methodology for mapping vulnerable species and habitats in shallow and deep water for marine aquaculture applications (Kutti and Husa, 2021; Kutti and Husa, 2022), as well as a professional assessment of the site's bathymetry and current conditions. The ROV was operated by a dedicated ROV pilot, while a consultant with a master’s degree in biology made ongoing assessments of conditions along the transects and any necessary adjustments. Continuous video recordings were made of the transects, and still photos were also taken in the field, with findings documented in a survey log. The video material from the ROV’s HD camera was analyzed by a consultant with a master's degree in biology or oceanography and experience in analyzing underwater video footage. Data was generated through continuous video analysis, with spatial data points placed every 50 meters along each transect (one data point = 50 meters of video line). There is significant uncertainty regarding the estimation of the exact area surveyed by the ROV. Aqua Kompetanse AS uses a camera with a 58.2-degree angle. During ROV operation, the camera captures both vertical and some horizontal angles. The mapping width of each video transect line is estimated by Aqua Kompetanse AS to be approximately 5 meters. While it is not possible to identify all species and individuals within this area, Aqua Kompetanse AS considers that the presence of vulnerable habitat types will be detected. If such habitats are observed, the ROV operator will investigate the extent of the finding more closely, which may involve deviating from the planned transect lines. The ROV is equipped with both an HD camera and a lower-resolution camera that captures a wider field of view. This allows the field consultant to ensure that relevant findings along the transect are detected as effectively as possible. The ROV also has a mounted laser, with two parallel beams fixed at 5 cm, which is used to measure the size of observed features during video analysis. For each data point, the dominant substrate type was recorded, based on the European standard for visual mapping of seabeds in deep-water locations (EN 16260:2012). Substrates were categorized as: bedrock and large boulders (FF), very coarse sediment (St), coarse sediment, sand and gravel (G), silt and clay (S), coral rubble (KG), and dead coral framework (DK). Substrate type was also recorded for each individual observation. Findings included in the mapping were identified to the lowest possible taxonomic level. Sponges that could not be identified to species level through visual observation were grouped by genus when possible or otherwise categorized by morphotype as described by Kazanidis et al. (2019) and later in Norwegian by Kutti and Husa (2021). Sponges smaller than 5 cm were not registered, nor included in the density calculations. Reference: Haddad, C.; Alegretti, C.B. (2024). Kartlegging av sårbare marine arter og naturtyper ved Kvingra i Leka kommune, april 2024. Rapportnummer: 3053-3-24K, levert av Aqua Kompetanse AS.
| Etendue de l'étude | The area investigated is located in Leka municipality, Trøndelag. The site currently consists of two rows of cages, and an application has been submitted for an increase in maximum allowed biomass (MTB). The facility is located offshore, east of Kvingra island. The site is mainly situated over deep water; however, to the west of the facility the seabed slopes upward toward Kvingra Island. The deeper area beneath the facility consists of a channel with a moderately uneven seabed. As a result, several habitat types occur within the vicinity and are included in the investigation. To the west of the facility, the seabed comprises a slope and shallow areas that may be suitable for vulnerable marine habitats. Within the channel, smaller elevations are present and are assumed to consist of hard-bottom substrates. These elevations may support small occurrences of vulnerable species. Aerial imagery indicates a likely presence of shell sand and kelp forest west of the facility, and modelled data from the Naturbase mapping tool confirm the occurrence of kelp forest and shell sand habitats. The survey area is defined based on current data (Hagen, 2016) and seabed mapping using multibeam echosounder data (Hagen, 2016b). Current measurements were conducted over a period of approximately one month. Water exchange at the site shows two dominant current directions, approximately 217° and 37°. The survey area was therefore defined to extend 1000 meters in the directions of 37° and 217°. The minimum survey distance was set to 250 meters from the facility in all directions where current data indicate limited water exchange. The survey area is bounded by land to the west of the facility. Areas shallower than 10 meters were excluded from the survey area, as such shallow depths are not suitable for ROV-based methodology. Figure 3 shows both the 1000-metre and 500-metre buffers from the facility footprint, as well as circles drawn from each corner of the facility frame. All areas located beyond 500 meters from the facility are situated over deep water, and the entire area is therefore included in the survey, in accordance with Kutti and Husa (2021). The total area of the planned survey area is 1.66 km². Reference: Haddad, C.; Alegretti, C.B. (2024). Kartlegging av sårbare marine arter og naturtyper ved Kvingra i Leka kommune, april 2024. Rapportnummer: 3053-3-24K, levert av Aqua Kompetanse AS. |
|---|
Description des étapes de la méthode:
- Equipment: Aqua Kompetanse AS normally uses an Aegir 50 ROV from Ocean Robotics, equipped with a minimum of 3 x 3500 lumen LED lights, an HD camera with zoom, and Advanced Navigation underwater positioning with an accuracy of 1.5 meters per 100 meters. The positioning system is connected to a GNSS antenna from Advanced Navigation. The size of observed objects is measured using a mounted laser with two fixed beams spaced 50 mm apart. The type of ROV used is selected based on the survey area, depth, and logistical considerations. All equipment used meets, at a minimum, the baseline requirements specified by Kutti and Husa (2021 and 2022). Reference: Haddad, C.; Alegretti, C.B. (2024). Kartlegging av sårbare marine arter og naturtyper ved Kvingra i Leka kommune, april 2024. Rapportnummer: 3053-3-24K, levert av Aqua Kompetanse AS.
Métadonnées additionnelles
| Identifiants alternatifs | https://ipt.gbif.no/resource?r=3053-3-24k |
|---|