Описание
This is the OBIS extraction of the Ocean Tracking Network and Technical University of Denmark (DTU) Decadal tracking of Atlantic Bluefin Tuna, consisting of the release tagging metadata, i.e. the location and date when the tagged animal was released, and summarized detection events of tagged individuals. If readers are interested in the source dataset they may also inquire with the project PIs as listed here or on the OTN web site (https://members.oceantrack.org/project?ccode=BFTDK).
Abstract:In 1930-1950, bluefin tuna were commercially fished in Denmark and Sweden. Landings were several hundred tonnes per year, with a peak of 2000t in Sweden in 1942. Fishing continued in the next two decades and then it gradually disappeared. Sport fishing for bluefin tuna in the Kattegat and the Sound continued until the 1960s. But then, bluefin tuna catches became increasingly rare. After decades of absence, bluefin tuna have recently been sighted again in the Northeastern Atlantic, inter alia off the coast of Bohuslän and in the Skagerrak and Kattegat. In 2016 and 2017, large schools of several hundred large individuals were observed. These adult fish hunted mackerel and herring during late summer and autumn. The reasons for the return and origin of the bluefin tuna in the North Sea-Skagerrak-Kattegat are unknown. This project will use electronic tags to help understand its migration patterns and behavior, avoid unwanted bycatch and support sustainable management of the stock. Attaching long life acoustic tags holds the potential to observe transatlantic migration as well as repeatability of the migratory pattern, by using the OTN network of receivers.
Записи данных
Данные этого sampling event ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 3 записей.
Также в наличии 2 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.
Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.
Версии
В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.
Как оформить ссылку
Исследователи должны дать ссылку на эту работу следующим образом:
Aarestrup, K. 2018. Decadal tracking of Atlantic Bluefin Tuna. Accessed via the Ocean Tracking Network OBIS IPT on INSERT DATE
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является Ocean Tracking Network. Эта работа находится под лицензией Creative Commons Attribution (CC-BY 4.0).
Регистрация в GBIF
Этот ресурс не был зарегистрирован в GBIF
Ключевые слова
ACOUSTIC TAGS; EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH; Occurrence; Samplingevent
Внешние данные
Ресурс также доступен в других форматах
| Decadal tracking of Atlantic Bluefin Tuna | https://members.oceantrack.org/project?ccode=BFTDK ASCII HTM |
|---|
Контакты
- Originator ●
- Point Of Contact
- Data Manager
- Dalhousie University
- +1 (902) 494-4101
- Content Provider ●
- Principal Investigator
http://orcid.org/0000-0001-8521-6270
- Content Provider
- Content Provider
Географический охват
REGION HOVEDSTADEN
| Ограничивающие координаты | Юг Запад [57,96, 10,75], Север Восток [58,28, 11,09] |
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Временной охват
| Дата начала | 2018-08-24 |
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Данные проекта
In 1930-1950, bluefin tuna were commercially fished in Denmark and Sweden. Landings were several hundred tonnes per year, with a peak of 2000t in Sweden in 1942. Fishing continued in the next two decades and then it gradually disappeared. Sport fishing for bluefin tuna in the Kattegat and the Sound continued until the 1960s. But then, bluefin tuna catches became increasingly rare. After decades of absence, bluefin tuna have recently been sighted again in the Northeastern Atlantic, inter alia off the coast of Bohuslän and in the Skagerrak and Kattegat. In 2016 and 2017, large schools of several hundred large individuals were observed. These adult fish hunted mackerel and herring during late summer and autumn. The reasons for the return and origin of the bluefin tuna in the North Sea-Skagerrak-Kattegat are unknown. This project will use electronic tags to help understand its migration patterns and behavior, avoid unwanted bycatch and support sustainable management of the stock. Attaching long life acoustic tags holds the potential to observe transatlantic migration as well as repeatability of the migratory pattern, by using the OTN network of receivers.
| Название | Decadal tracking of Atlantic Bluefin Tuna |
|---|---|
| Финансирование | OTN is a research and technology development initiative headquartered at Dalhousie University, in Halifax Nova Scotia. OTN is funded by the Canada Foundation for Innovation (CFI) and is grateful to have once received funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Social Sciences and Engineering Research Council of Canada (SSHRC). OTN is also grateful for the continued support from Research Nova Scotia, and OTN's host institution, Dalhousie University. |
| Описание района исследования | No study area description for this project was provided to OTN for publication. |
| Описание плана выполнения исследований | A wide range of aquatic species are tagged with small electronic transmitters, surgically implanted or attached externally, which can operate for up to 20 years. Acoustic receivers arranged in line on the ocean floor as well as attached to buoys, gliders and large animals (e.g. grey seals) pick up the coded acoustic signals from these tags identifying each tagged sea creature that passes within half a kilometer of the receiver. Data collected by these listening stations are subsequently uploaded to one of many compatible data nodes, adding to the reach of an intercompatible network of networks designed and maintained by the Ocean Tracking Network, producing current and reliable records for every part of the globe. Certain classes of electronic tags and listening equipment (receivers) may also be outfitted or co-located with sensors to measure the ocean's temperature, depth, salinity, currents, chemistry, and other properties. |
Исполнители проекта:
Методы сбора
Acoustic tags released.
| Охват исследования | Program started 2018-08-24 and ran until |
|---|---|
| Контроль качества | OTN species names are verified using the World Register of Marine Species (WoRMS). If species names on new data cannot be verified against (a) known valid names in OTN, and/or (b) WoRMs the Data Provider will be notified so they can check they are correct. Names that cannot be placed after checking with WoRMS are, where possible, placed on the basis of other authoritative sources, such as the Fishbase or ITIS; and once completely verified a request will be sent to WoRMS for addition of the verified species name. http://members.oceantrack.org/data/discovery/byspecies |
Описание этапа методики:
- This resource was created by the Ocean Tracking Network Data Centre as a summarized representation of animal presence determined by electronic tagging efforts. Darwin Core (DwC) records were extracted from the OTN database and filtered and summarized according to international agreed-upon standards.
Библиографические ссылки
- Aarestrup, K. 2018. Decadal tracking of Atlantic Bluefin Tuna In: Ocean Tracking Network Data Centre, Halifax Canada / otndc@dal.ca Retrieved: 2030-08-27 from db.load.oceantrack.org
Дополнительные метаданные
Access Constraints: none Use Constraints: Acknowledge the use of specific records from contributing databases in the form appearing in the 'Citation' field thereof (if any); and acknowledge the use of the OBIS facility. For information purposes, email to info@obis.org the full citation of any publication made (printed or electronic) that cites OBIS or any constituent part. Recognize the limitations of data in OBIS. See https://manual.obis.org/policy.html#disclaimer for more details
| Цель | These data are for display on the OBIS portal and associated mapping programs and for download to personal computers for ad-hoc end-user analysis. |
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| Альтернативные идентификаторы | https://members.oceantrack.org/ipt/resource?r=otndtudecadaltrackingofat |