Description
This dataset compiles bottom trawl survey data on demersal fishes collected along the western and southwestern coasts of Taiwan from 2020 to 2023. The survey covered 41 sampling stations across 10 key locations, ranging from Miaoli in the north to Pingtung in the south. In addition to commonly surveyed nearshore shallow areas, the sampling also extended to offshore regions with depths reaching 450 meters, encompassing distinct underwater geomorphological features such as the Changyun Rise, the Kaoping Submarine Canyon, and the Penghu Channel. This dataset represents one of the few systematic investigations in Taiwan that span a wide spectrum of bathymetric and geomorphological gradients. All surveys were conducted aboard the R/V New Ocean Research III, using a standardized 6-meter-wide beam trawl towed for 30 minutes at a speed of approximately 2 knots. A total of 119 hauls were completed, yielding 10,494 individual records representing 219 demersal fish species across 80 families. For each haul, the dataset includes species identification, number of individuals, sampling date, station location, and water depth. Published in Darwin Core format in accordance with GBIF standards, this dataset provides essential baseline information for understanding demersal fish assemblages in soft-bottom ecosystems along Taiwan’s western coast. As one of the few publicly accessible bottom trawl datasets from East Asia, it supports applications in marine protected area (MPA) planning, species distribution modeling (SDM), ecosystem service valuation, and global data integration for sustainable ocean governance.
Enregistrements de données
Les données de cette ressource données d'échantillonnage 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 119 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:
Chen M H, Lai C C (2025). Bottom Trawl Survey of Demersal Fishes and Essential Fish Habitats along the Western Coast of Taiwan (2020–2023). Version 1.0. Department of Oceanography, National Sun Yat-sen University, Kaohsiung Taiwan. Samplingevent dataset. https://ipt.taibif.tw/resource?r=demersal_fishes_2020-2024&v=1.0
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est Department of Oceanography, National Sun Yat-sen University, Kaohsiung Taiwan. 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 : 56fc46e6-3b01-4673-be20-e5f81ba405e4. Department of Oceanography, National Sun Yat-sen University, Kaohsiung Taiwan publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du Taiwan Biodiversity Information Facility.
Mots-clé
Samplingevent; bottom trawl; Taiwan Strait; fish assemblage; open biodiversity data
Contacts
- Créateur ●
- Personne De Contact
https://orcid.org/0000-0002-1868-7061
- Chercheur Principal
Couverture géographique
The study was conducted along the western and southwestern coasts of Taiwan. Sampling took place at 41 stations distributed across 10 key locations from Miaoli in the north to Pingtung in the south, encompassing a wide range of latitudes (~22.2°N to ~24.6°N).
| Enveloppe géographique | Sud Ouest [22,169, 119,756], Nord Est [24,649, 120,743] |
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Couverture taxonomique
The dataset comprises 10,494 individual records of demersal fishes, representing 219 species across 80 families. All fish specimens were identified to the lowest possible taxonomic level, primarily species, using authoritative references including Fishes of Taiwan (Shen, 1993), Fishes of Japan (Nakabo, 2013), and FishBase. The taxonomic classification follows the Darwin Core standard and the taxonomy is aligned with the GBIF Backbone Taxonomy.
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Chondrichthyes, Actinopterygii |
| Order | Gadiformes, Gasterosteiformes, Orectolobiformes, Tetraodontiformes, Ophidiiformes, Beryciformes, Stomiiformes, Torpediniformes, Lophiiformes, Carcharhiniformes, Aulopiformes, Myliobatiformes, Chimaeriformes, Scorpaeniformes, Perciformes, Rajiformes, Siluriformes, Anguilliformes, Pleuronectiformes, Clupeiformes, Myctophiformes |
| Family | Hemiscylliidae, Siganidae, Synodontidae, Haemulidae, Bregmacerotidae, Pristigasteridae, Percophidae, Carangidae, Myctophidae, Chimaeridae, Ogcocephalidae, Scyliorhinidae, Ephippidae, Platyrhinidae, Moridae, Apogonidae, Plotosidae, Sternoptychidae, Gerreidae, Hoplichthyidae, Samaridae, Scorpaenidae, Neoscopelidae, Triglidae, Pomacentridae, Monacanthidae, Drepaneidae, Nemichthyidae, Trichiuridae, Labridae, Lophiidae, Mullidae, Dactylopteridae, Urolophidae, Champsodontidae, Serranidae, Chlorophthalmidae, Polynemidae, Engraulidae, Rhinobatidae, Bothidae, Diodontidae, Narcinidae, Priacanthidae, Aploactinidae, Ostraciidae, Centriscidae, Tetraodontidae, Sciaenidae, Macrouridae, Stromateidae, Uranoscopidae, Terapontidae, Callionymidae, Ophichthidae, Nemipteridae, Callionymidae, Citharidae, Antennariidae, Cynoglossidae, Muraenidae, Gobiidae, Ophidiidae, Paralichthyidae, Sillaginidae, Platycephalidae, Acropomatidae, Pomacanthidae, Congridae, Sparidae, Trachichthyidae, Dasyatidae, Proscylliidae, Menidae, Pegasidae, Pinguipedidae, Labridae, Chaetodontidae, Aulopidae, Leiognathidae, Lutjanidae, Syngnathidae, Soleidae |
Couverture temporelle
| Date de début / Date de fin | 2020-05-17 / 2023-07-15 |
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Données sur le projet
This project aimed to investigate the composition of demersal fish communities along the western and southwestern coasts of Taiwan through standardized bottom trawl surveys conducted from 2020 to 2023 aboard the R/V New Ocean Research III. The surveys covered 10 representative coastal locations from Miaoli in the north to Pingtung in the south, with a total of 41 trawl stations spanning from nearshore shallow waters to offshore areas reaching depths of 450 meters. Each haul was conducted using a standardized 6-meter-wide beam trawl, towed at a speed of approximately 2 knots for 30 minutes. A total of 119 hauls were completed, resulting in 10,494 individual records of demersal fishes, representing 219 species across 80 families.
| Titre | Long-term Marine Biodiversity Research and Monitoring Program Supported by MOST and NSTC in Taiwan (2019-2023) |
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| Identifiant | MOST 108- 2611-M-110-005, 108-2621-M-110-003, 109-2611-M-110-006, 109- 2621-M-110-002, 110-2611-M-110-016, 110-2621-M-110-001, NSTC 111-2611-M-110- 006, 111-2621-M-110-002, 112-2611-M-029, 112-2621-M-110- 002 |
| Financement | This dataset was generated as part of long-term research projects supported by the Ministry of Science and Technology (MOST) and the National Science and Technology Council (NSTC), Taiwan. The specific grant numbers supporting this work include: MOST: 108-2611-M-110-005, 108-2621-M-110-003, 109-2611-M-110-006, 109-2621-M-110-002, 110-2611-M-110-016, 110-2621-M-110-001 NSTC: 111-2611-M-110-006, 111-2621-M-110-002, 112-2611-M-029, 112-2621-M-110-002 |
| Description du domaine d'étude / de recherche | The project focused on the soft-bottom marine habitats along the western and southwestern coasts of Taiwan, covering a wide latitudinal and bathymetric range. The study area includes nearshore and offshore environments featuring complex geomorphological structures such as the Changyun Rise, Penghu Channel, and Kaoping Submarine Canyon. |
| Description du design | The purpose of this study was to investigate the species composition of demersal fish assemblages and the influence of environmental factors along the western and southwestern coasts of Taiwan. A total of 41 sampling stations were established across 10 key locations, spanning a wide range of latitudes (approximately 22.2°N to 24.6°N) and depths (15 to 450 meters). The sampling design included both nearshore and offshore soft-bottom habitats and geomorphologically distinct areas such as the Changyun Rise, the Penghu Channel, and the Kaoping Submarine Canyon. A standardized beam trawl protocol and concurrent environmental measurements were applied to ensure data consistency and facilitate integrated ecological analysis. |
Méthodes d'échantillonnage
All sampling followed a standardized protocol using a 6-meter-wide beam trawl with a net body length of 8 meters and a cod-end mesh size of 2.5 cm. Each haul lasted for 30 minutes at a towing speed of approximately 2 knots. The total trawled area per haul was estimated at approximately 11,112 m². Each haul was treated as an independent sampling unit. Onboard, the fish catch was roughly sorted by major taxonomic groups, and all specimens were immediately frozen at −20°C for preservation. After returning to the laboratory, specimens were transferred to laboratory freezers for further identification and data recording. Sampling was conducted during both the warm (May–October) and cold (November–April) seasons to capture seasonal variation in fish assemblages. Stations spanned a depth gradient from 15 to 450 meters, covering both continental shelf and slope environments, and included geomorphologically distinct features such as submarine canyons, underwater rises, and channels.
| Etendue de l'étude | The study was conducted along the western and southwestern coasts of Taiwan between May 2020 and July 2023. Sampling took place at 41 stations distributed across 10 key locations from Miaoli in the north to Pingtung in the south, encompassing a wide range of latitudes (~22.2°N to ~24.6°N) and depths (15 to 450 meters). The survey area includes both nearshore and offshore soft-bottom habitats, with geomorphologically distinct features such as the Changyun Rise, the Penghu Channel, and the Kaoping Submarine Canyon. The trawl surveys targeted demersal fish communities inhabiting unconsolidated sedimentary substrates across continental shelf and slope zones. |
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| Contrôle qualité | All fish specimens were identified by experienced taxonomists specializing in marine fish fauna of Taiwan. Species identification was based on morphological characteristics following standard taxonomic keys and literature, including Shen (1993), Nakabo (2013), and FishBase (2024). Scientific names were verified and standardized according to the updated taxonomy in FishBase and the Taiwan Fish Database (FishDB). Data quality control was conducted throughout the data compilation process. Species names, geographic coordinates, sampling dates, and depth information were checked for consistency and errors. The dataset was structured and formatted following the Darwin Core standard for publication on GBIF. |
Description des étapes de la méthode:
- All fish specimens were identified to the lowest possible taxonomic level, typically to species, and the number of individuals per species was recorded. Some specimens were retained as vouchers. Taxonomic identification followed authoritative references, including Shen (1993), Nakabo (2013), and FishBase (2025).
Métadonnées additionnelles
| Identifiants alternatifs | https://ipt.taibif.tw/resource?r=demersal_fishes_2020-2024 |
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