AndreaBozzo/ceres-open-data-index huggingface dataset:
Stationary visual census of commercial fishes in Mayotte (2023)

Since its establishment in 2010, the Mayotte Marine Natural Park has been promoting fishing activities beyond the lagoon, specifically targeting pelagic species to alleviate fishing pressure on reef species. However, despite these efforts, catches of reef fish remain notably high. In 2020, reef carnivores (groupers, snappers…), constituted approximately 35% of the total catches. Ensuring the sustainability of reef fishing necessitates regular assessments of Mayotte's commercial reef fish populations.
This study aims to evaluate the current status of these populations and comprehend their dynamics by comparing them with historical data. Scuba diving was employed for the assessment of ichthyological populations and habitat description. In 2023, a total of 96 sites, comprising 1,100 stations (Stationary visual census), were sampled, covering a combined sampled area of 169,400 m2, with an in situ observation duration totalling 110 hours. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Macrobenthos monitoring in the Trieste harbour, North Adriatic Sea (Port Authority) in June 2013 and March 2015

Macrobenthos monitoring in the Trieste harbour, North Adriatic Sea (Port Authority) in June 2013 and March 2015
Grab sampling (Van Veen, 0.1 square metre grab sampler), sieving on 0.5 mm, sample fixed with buffered formaldehyde (4% final concentration).
Black Sea - Danube Delta - DIVAnd 4D seasonal analysis of Water body dissolved oxygen concentration 1970/2022 v2025

Water body dissolved oxygen concentration - Seasonal Climatology for NW Black Sea (region in front of Danube Delta months) for the period 1970-2019 on the domain: Lon E28.5-30.5°E, Lat N43.7-45.6°N. 
Season definition: winter: December-February, - spring: March-May, - summer: June-August, - autumn: September-November.
Units: umol/l.
Data Sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Description of DIVA analysis: The computation was done with the DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.13, using GEBCO 30sec topography for the spatial connectivity of water masses. Horizontal correlation length of 47.73km and vertical correlation length of 45m were applied. 
The horizontal resolution of the produced DIVAnd maps grids is 0.01 degrees.
The vertical resolution is 17 depth levels: 0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 20.0, 25.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0 m.  
The error variance (epsilon2): 1 
An anamorphosis transformation was applied to the data: threshold value=200.
The mean value was used as background analysis field.
Quality control of the observations was applied using the interpolated field: QCMETHOD=3 and visual inspection (Observations with residuals outside the minimum and maximum values of the 99% quantile were discarded from the analysis after thoroughly visual inspection).
LifeWatch observatory data: permanent Cetacean passive acoustic sensor network in the Belgian part of the North Sea: 2020

As part of the Belgian LifeWatch observatory, a permanent Cetacean passive acoustic network is established in the Belgian Part of the North Sea. The sensor network uses C-PODs (Chelonia Limited) to register the presence of harbour porpoise (Phocoena phocoena) in the neighbourhood. Click trains of harbour porpoises are detected and classified using the CPOD software and high and moderate quality click trains are selected. The dataset is published yearly in the highest time resolution, per minute
ANEMOON Beach washup monitoring  (SMP) data along the Dutch coastline  collected through citizen science.

The SMP data originates from the Strandaanspoelsel (beach washup) Monitoring Project 
(SMP), a citizen science project executed by Stichting ANEMOON. Data dates back to 
1977 and new data will keep on being added as long as there are sufficient citizen 
scientists. The data is from eight locations scattered along the Dutch coastline. On 
these locations, all washed-up marine organisms and remains are determined and 
counted on a biweekly or monthly basis. Macroalgae, Cnidarians, Gastropods, 
Cephalopods, Bivalves, Crustaceans, Echinoderms, Shark and Ray egg capsules and 
Bryozoans are noted at species level.
TunSea, 2023. Cryptogenic, Rare and Non-indigenous marine species in Tunisian coastline, recorded by Citizen Scientists

This dataset sourced from citizen scientists through the TunSea platform (TunSea), focusing on rare, cryptogenic and non-indigenous marine species along Tunisia-#039;s coastline. Initial data, comprising images and comments, underwent careful verification for accuracy. The refined dataset consolidates information linked to each specific observation. This study contributes to understanding the presence and distribution of non-indigenous marine species along the coastline of Tunisia in the south of the Mediterranean Sea.
Hexacorallians of the world

Catalogue of Hexacorallians species, bibliography of literature in which they were described, inventory of type specimens, distribution maps, and images.
A compilation of publications concerning taxonomy, nomenclature, and geographic distribution of extant hexacorallians - members of cnidarian orders Actiniaria (sea anemones in the strict sense), Antipatharia (black corals), Ceriantharia (tube anemones), Corallimorpharia (sea anemones in the loose sense), Ptychodactiaria (sea anemones in the loose sense), Scleractinia (hard or stony corals), and Zoanthidea (sea anemones in the loose sense)
LifeWatch observatory data: permanent Cetacean passive acoustic sensor network in the Belgian part of the North Sea

As part of the Belgian LifeWatch observatory, a permanent Cetacean passive acoustic network is established in the Belgian Part of the North Sea. The sensor network uses C-PODs (Chelonia Limited) to register the presence of harbour porpoise (Phocoena phocoena) in the neighbourhood. Click trains of harbour porpoises are detected and classified using the CPOD software and high and moderate quality click trains are selected. The dataset is published yearly aggregated per hour. In related datasets, described below, aggregated data per minute is available. The network records echolocation clicks of harbour porpoises (Phocoena phocoena) and dolphins. https://www.lifewatch.be/en/cetacean-passive-acoustic-network
Miesmuschelb├ñnke im Nieders├ñchsischen Wattenmeer 2010 (UIG), Blue mussel beds in the Wadden Sea of Lower Saxony 2010

Miesmuschelb├ñnke im Nieders├ñchsischen Wattenmeer 2010. Im Rahmen des Miesmuschel Managementplans wurden j├ñhrliche Kartierungen der eulitoralen Miesmuschelb├ñnke im Nieders├ñchsischen Wattenmeer durchgef├╝hrt. Die Erfassung erfolgte mittels stereoskopischer Auswertung von Luftbildern. Die Befliegungen fanden im Fr├╝hjahr bzw. Sommer fl├ñchendeckend statt. (Deutsch), Blue mussel beds in the Wadden Sea of Lower Saxony 2010. The intertidal blue mussel beds were determined yearly in the scope of the blue mussel management plan. Aerial surveys were carried out and aerial photographs were analysed by using a stereoscope to detect the mussel beds. (Englisch)
POPA- Fisheries Observer Program of the Azores: Marine mammal sightings in the Azores tuna fishery from 1998 on: during navigation or search mode

Sightings of cetaceans were recorded daily, at 6 different fixed periods (snap shots), when the boat was in navigation or search mode.
Sightings were recorded at distances shorter and larger than 300 meters from the boat.
For more detailed information on the dataset, including abundances estimates, please contact data owner (miguel@uac.pt)
Zooplankton studies in the Southern Bight of the North Sea between 1971 and 1974

Qualitative and quantitative composition of the zooplankton community for 73 "Mechele" stations in the Southern Bight of the North Sea between January 1971 and December 1974.The data are digitized from technical reports in the frame of the 4DEMON project.
Study on the diversity and nature of the North Sea zooplankton community. Samples (bucket or pump) were taken at 73 stations at surface and at different depths between 23th of January 1971 and 04th of December 1974. The density of different zooplankton taxa is given as the amount of individuals per unit volume of the water. Additionally reproduction is mentioned next to the taxon density. Biomass (fresh weight) is calculated for most abundant zooplankton taxa and for each unique eventID total zooplankton dry weight and organic matter is noted. For cruises SEA1971/VUB2-3-4 and SEA1972/VUB1-2 densities and reproduction values of individual copepoda species are given.
Harpacticoida from a seasonal field survey in the White Sea

Dataset originated from field surveys carried out from May to October 2001, to assess the seasonal variations in the population structure of four species of intertidal harpacticoids (Paraleptastacus kliei, Huntemannia jadensis, Heterolaophonte minuta, and Stenhelia palustris) at three sites in the middle intertidal zone of Chernorechenskaya Bay (White Sea) with different sediment compositions.
At different sites, the changes in the harpacticoid abundance, and the times and amplitudes of the peaks were different. The features of the local dynamics of the population are determined both by the intensity of its reproduction at the reproductive habitats and by the intensity of subsequent migrations. A comparison of the data available on the seasonal dynamics of the intertidal harpacticoids at various latitudes allows one to suggest that they are mainly determined by the temperature regime.
Study on plankton at the port of Ostend in 1965

List of collected phytoplankton and zooplankton taxa and their densities sampled at 3 points in the port of Oostende in 1965. The data were digitized by VLIZ from the original report: De Pauw, N. (1969). Contribution à l'étude du plankton dans le port d'Ostende.
Surface plankton samples of 50L were collected using a plankton net (40µm) at 3 points in the port of oostende. In the first part of the dataset an overview of all species found during the whole sampling period is given. The second part of the dataset gives a detailed overview of species (and their densities per 50L) which were present (or absent) per month and per sampling point. The third part of the dataset contains some physicochemical measurements for bimonthly samples at the 3 sampling points.
Nanophytoplankton along the salinity gradient in the Tamar estuary in 1969

List of phytoplankton species for 13 salinity zones along the Tamar estuary on 10th of April, 1969. The data were digitized by VLIZ from the original report: Mommaerts, J.-P. (1971). Note sur le nannoplankton de l'estuaire du Tamar (Plymouth, Grande-Bretagne): étude d'un transect couvrant tout le gradient de salinité.
The Tamar estuary has been sampled from sea to freshwater. Salinity and chlorophyll a have been measured and nannoplankton determined.
Seabird observations along the coasts of Greenland, Iceland, Faeroes and the North East of Scotland (June-August 1974)

First part of dataset gives an overview of seabirds observed between 25 June and 31 July 1974 along Greenland, Iceland, Faeroes and the North East of Scotland. The second part gives the birding times for all stations where ornithological observations were made. Additionally air and water temperature measurements were noted for some stations. The data were digitized by VLIZ from the original report: Joiris, C. (1976). Seabirds seen during a return voyage from Belgium to Greenland in July.
Between 23 June and 1 August 1974 Dr. Claude Joiris sailed with the yacht 'Atalante" from Nieuwpoort (Belgium) along the east coast of Great Britain, to Thorshavn (Faeroes), several points along the east and north-east coasts of Iceland, then to Angmagssalik in Greenland and back, via Reykjavik, the Vestmann Islands (Iceland) and Edinburgh (Scotland) to Nieuwpoort. The speed was about 9 knots (17km/h). Birds were recorded during standard one-hour observation periods (in fractions of a quarter of an hour), from a point situated at the rear of the yacht, about 1,5 m above sea-level.
Benthic algae of the pier of Zeebrugge (1977-1978)

Species list with remarks on the frequency of occurrence and ecology of the species for the pier of Zeebrugge in 1977 and 1978. The data were digitized by VLIZ from the original report: De Vos, D.; Coppejans, E. (1980). Recente inventaris van de benthische wieren (Cyanophyta, Chlorophyta, Phaeophyta, Rhodophyta) van de pier van Zeebrugge = Inventaire récent des algues benthiques (Cyanophyta, Chlorophyta, Phaeophyta, Rhodophyta) du môle de Zeebrugge.
During this detailed study of the algal vegetation of the Zeebrugge pier in 1977-78, 45 taxa were identified, of which 4 Cyanophycea, 18 Chlorophycea, 8 Phaeophycea and 15 Rhodophycea.
Influence of light on the fixation of Ostrea edulis and Crepidula fornicata on oyster collectors in 1964

Counts of fixed Ostrea edulis and Crepidula fornicata species on 4 zones of a tile from an oyster collector in relationship to light intensity. The data were digitized by VLIZ from the original report: Bracke, E.; Polk, P. (1969). Contribution à la connaissance de la faune marine de la côte belge: 6. L'influence de la lumière sur la fixation d'Ostrea edulis (L) et de Crepidula fornicata (L) sur les collecteurs d'huîtres.
The difference of phototropism and phototaxis of both molluscs influenced their fixation. The orientation of both molluscs is towards the incoming light-direction, less pronounced when the light-density to the center of the tile is decreasing. The density of the populations of oysters is increasing towards the center of the tiles by decreasing light-intensity, the density of the Crepidula-population decreasing towards the center of the collector.
Harpacticoida from a field survey in the White Sea in 2000

Data originated from a field study on harpacticoida carried out in the Chernaya River estuary of Kandalaksha (White Sea) in July - October 2000. The aim of the study was to assess the colonization patterns of Harpacticoida according to different sediment conditions.
The sampling of experimental and control plots consisted of 30 samples with three subsamples each taken by syringe corer 1'8 cm2. The surveyed reas were located in the mid-littoral zone of a relatively homogeneous slightly silty sandflat. The water salinity varied from 16 to 20%.
Pycnogonida distribution data from: Deep-sea fauna of European seas - an annotated species check-list of benthic invertebrates living deeper than 2000 m in the seas bordering Europe

An annotated check-list is given of Pycnogonida species occurring deeper than 2000 m in the seas bordering Europe.
The check-list is based on published data. The check-list includes 28 species. For each species synonymy, data on localities in European seas and general species distribution are provided. Station data are presented separately in the present thematic issue.
Ecological study on the algal population of the rocky coasts of "Le Dramont" (Saint Raphaël, France) between 1968 and 1972

Inventory of algae sampled between 1968 and 1972 at Le Dramont and vertical distribution data for 4 transects in summer and spring. The data were digitized by VLIZ from the original report: Coppejans, E. (1972). Résultats d'une étude systématique et écologique de la population algale des côtes rocheuses du Dramont, St. Raphaël (Var, France).
Study, stretched over a period of four years (1968-1972) on the algae population of the Le Dramont rocky coasts. Their apportionment and floristic composition have been consciously observed and studied, in summer as well as during spring, and this up to a depth of 45 m. A high number (35) of sections were done for that purpose, all over the work territory. Four of them (vertical distributions fig. 1, 2, 3, 4) are described here.
Polychaeta distribution data from: Deep-sea fauna of European seas - an annotated species check-list of benthic invertebrates living deeper than 2000 m in the seas bordering Europe

An annotated check-list is given of Polychaeta species occurring deeper than 2000 m in the seas bordering Europe.
The check-list is based on published data. The checklist includes 175 species. Synonymy and data on localities in European seas are provided. Station data are presented separately in the present thematic issue.
Meiobenthos of 5 mangrove vegetation types at Gazi Bay (Kenya) in August 1989

Vertical distribution data of meiobenthos at Avicennia, Bruguiera, Ceriops, Rhizophora and Sonneratia and abiotic factors of the sediment sampled on the 7th of August 1989 in Gazi Bay (Kenya). The data were digitized by VLIZ from the original report: Vanhove, S. (1990). Studie van de benthische meiofauna van vijf mangrove-vegetatietypes van Gazi Bay (Kenia)= Study of the meiobenthos of 5 mangrove vegetation types in Gazi Bay, Kenya. MSc Thesis. University of Gent: Faculty of Sciences: Gent. IX, 146, deel 2 tabellen en figuren pp.
Vertical distribution patterns of meiobenthos and their relation to the different mangrove vegetations Avicennia, Bruguiera, Ceriops, Rhizophora and Sonneratia have been examined. The vertical distribution pattern in the sediment (to a depth of 20 cm) of density and biomass of the meiofauna, and abiotic factors such as sediment granulometry, nutrients, organic matter were used to explain the observed distribution patterns. A total of 17 taxa has been observed and high densities were encountered: Bruguiera (6707 ind/10 cm2 ), followed by Rhizophora (3998 ind/10cm2 ), Avicennia (3442 ind/10cm2 ), Sonneratia (2889 ind/10cm2 ) and Ceriops (1976 ind/10cm2 ). Nematodes dominated; the remainder was made of copepods, tubellarians, oligochaetes, polychaetes and rotifers. Other taxa were only sporadically observed, partially governed by the sediment. The data indicate high densities still occur at greater depth: 54 ind. At Avicennia 15-20 cm; 759 ind. At Bruguiera 10-15 cm; 380 ind. At Ceriops 15-22.5 cm; 37 ind. At Rhizophora 15-17 cm and 13 ind. At Sonneratia +15 cm. Particle size measurements performed for the five stations show medium sand. The mud levels reached often considerable amounts (up to 8%). Both Kjeldahl-N and total organic matter are generally more concentrated with depth. The nutrient concentrations in the depth intervals, as well as the compared sediments, show great variability. Nematode length increases with increasing depth, although important differences between the stations were observed. Length and density are invertedly related. The data of total biomass differ considerable from one station to another: Ceriops (9.10 -5g) and Sonneratia (19.10 -5g). Besides granulometry, oxygen is the most important factor influencing composition and distribution of the meiofauna.
Monoplacophora distribution data from: Deep-sea fauna of European seas - an annotated species check-list of benthic invertebrates living deeper than 2000 m in the seas bordering Europe

An annotation is given for the species Rokopella brummeri (Goud et Gittenberger, 1993), the only monoplacophoran species occurring deeper than 2000 m in the seas bordering Europe. The species is known only from the type locality in the northeast Atlantic.
Active meso- and meiofauna in the nature reserve "Het Zwin" (Knokke) in 1969

Overview of all species (spiders, insects, zoo-and phytoplankton) captured and collected in "Het Zwin" during a 5 day training session in the field. The data were digitized by VLIZ from the original report: (1969). Eerste Licentie Dierkunde: Stage in de Oecologie der Dieren van 9-13 juni 1969 in het Zwin-Reservaat te Knokke. Rijksuniversiteit Gent: Gent. 20 pp.
This training session in the field on marine animal ecology was organized by the University of Gent. Numerical results were processed on site, and the determination of samples has been done in the laboratories. Dataset contains counts and densities of observed species.
Mesozooplankton in the Sea Scheldt between 1995 and 1996

Quantitative and qualitative study on mesozooplankton species in the Sea Scheldt between 1995 and 1996. The data were digitized by VLIZ from the original report: Van Mieghem, R. (1996). Mesozooplankton in de Zeeschelde. BSc Thesis. Vrije Universiteit Brussel: Brussel. 28, + annexes pp.
Between 1995 and 1996, 31 samples were taken to study the mesozooplankton community of the Sea Scheldt. Surface samples of 50 L were collected and filtered using a 50 µm planktonnet.
Fishing with motorized boats in the Belgian littoral area in 1932

Measurements and counts of fish caught by motorized boats in May 1932. The data were digitized by VLIZ from the original report: Gilson, G. (1932). Destruction du jeune poisson par la pêche littorale à moteur. Annales de l'Institut d'Etudes Maritimes d'Ostende = Annalen van het Zeewetenschappelijk Instituut, 2. Zeewetenschappelijk Instituut = Institut d'Etudes Maritimes: Oostende. 20 pp.
Study on the influence of wind-driven to motorized fishing boats on the destruction of young fish living in the Belgian littoral area. The fishing in the littoral area of the coast of Belgium has undergone a profound transformation since the publication in 1928. Before, it was practiced almost exclusively by sail - but today, the entire fleet of small boats is equipped with motors. Two unforeseen factors have aggravated the destruction of marine fish: the reduction in size and the use of organic materials by the industry.
Observations of three Idotea species (I. balthica, I. chelipes and I. granulosa) in Northern Europe, including the Baltic Sea - data derived from museum collections

Observation data of occurrence of three Idotea species collected from museum collections in Northern Europe.
Marine isopods of the genus Idotea Fabricius 1798 are common meso-grazers of the benthos. Approximately 30 different species exist worldwide, including eight species in Europe. Only three species, namely Idotea balthica (Pallas, 1772), I. chelipes (Pallas, 1766) and I. granulosa Rathke, 1843, were able to colonize the brackish environment of the Baltic Sea. To understand the ecology and distribution patterns of these key species under on-going environmental changes, occurrence data were collected from museum collections and own sampling.
Observations of three Idotea species (I. balthica, I. chelipes and I. granulosa) in Northern Europe, including the Baltic Sea - field data

Observation data of occurrence of three Idotea species collected from own field sampling in Northern Europe.
Marine isopods of the genus Idotea Fabricius 1798 are common meso-grazers of the benthos. Approximately 30 different species exist worldwide, including eight species in Europe. Only three species, namely Idotea balthica (Pallas, 1772), I. chelipes (Pallas, 1766) and I. granulosa Rathke, 1843, were able to colonize the brackish environment of the Baltic Sea. To understand the ecology and distribution patterns of these key species under on-going environmental changes, occurrence data were collected from museum collections and own sampling.
Harpacticoida from a monitoring survey in the Black Sea in 2000-2001

Field long-term monitoring survey of ecologically intact zone (control) within the human-impacted area at north-western part of the Black Sea.
25 samples (hand box-corer 10×10 cm) were taken on silty-sandy littoral (0.3 m depth) and mud flat of the Grygorivsky  Liman, the NW Black Sea (46°37’ N, 31°01’ E). Salinity 14 - 18 ppm.