Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2)
Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polar...
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PANGAEA - Data Publisher for Earth & Environmental Science
2020
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Online Access: | https://dx.doi.org/10.1594/pangaea.924587 https://doi.pangaea.de/10.1594/PANGAEA.924587 |
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ftdatacite:10.1594/pangaea.924587 2023-05-15T18:34:31+02:00 Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) Burkhardt, Elke 2020 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.924587 https://doi.pangaea.de/10.1594/PANGAEA.924587 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2312/bzpm_0717_2018 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Cetacean sightings WALOG DATE/TIME LATITUDE LONGITUDE Whale species Certainty of identification Individuals Underway cruise track measurements Visual observation PS107 Polarstern Marine Mammal Perimeter Surveillance from RV Polarstern MAPS dataset Dataset 2020 ftdatacite https://doi.org/10.1594/pangaea.924587 https://doi.org/10.2312/bzpm_0717_2018 2021-11-05T12:55:41Z Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polarstern expeditions through the nautical officer on watch. Opportunistic (visual) sightings by naked eye were logged during Polarstern Cruise PS107 (Tromsø - Tromsø) by the nautical officer on duty using a customized Software package (WALOG, WhAleLOGger) installed on a touch screen laptop located on the ship's bridge. Species were identified by naked eye or handheld binoculars (7x50) to the lowest possible taxonomical level and assigned a “certainty” level of identification. The number of animals were counted if possible or estimated for larger groups. Whenever identification to species level was not possible, the next identifiable taxonomical category was assigned. Information on sighting position, date and time are automatically transferred from the ship's DAVIS-Ship System (https://dship.awi.de/) to the WALOG software at the time of logging. Photographs were taken if possible for retrospective analysis. All data of acquired sightings were retrospectively validated by a marine biologist and converted to a standard format. To this end, plausibility of sighting time, location, standardization of species names, eventual comments added at the time of sighting, as well as additional information such as photographs (if available) were checked either to verify or improve species identification. Datasets are used in species distribution modelling and to inform interested parties about occurrences. : Date/Time is given in UTC. Certainty of identification: definite if observer clearly identified the species. The number of individuals is binned according to the options given in the data acquisition software: 1, 2, 3, less equal 5, less equal 10, greater than 10, greater than 20. More precise values may exist, due to observer comments. Dataset Tromsø DataCite Metadata Store (German National Library of Science and Technology) Tromsø |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Cetacean sightings WALOG DATE/TIME LATITUDE LONGITUDE Whale species Certainty of identification Individuals Underway cruise track measurements Visual observation PS107 Polarstern Marine Mammal Perimeter Surveillance from RV Polarstern MAPS |
spellingShingle |
Cetacean sightings WALOG DATE/TIME LATITUDE LONGITUDE Whale species Certainty of identification Individuals Underway cruise track measurements Visual observation PS107 Polarstern Marine Mammal Perimeter Surveillance from RV Polarstern MAPS Burkhardt, Elke Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
topic_facet |
Cetacean sightings WALOG DATE/TIME LATITUDE LONGITUDE Whale species Certainty of identification Individuals Underway cruise track measurements Visual observation PS107 Polarstern Marine Mammal Perimeter Surveillance from RV Polarstern MAPS |
description |
Data on whale distribution and abundance in the polar oceans is rather sparse, as implementing the standard surveying method, line-transect surveys, is challenging and costly. To overcome this problem, we initiated a program to electronically log all opportunistic cetacean sightings during all Polarstern expeditions through the nautical officer on watch. Opportunistic (visual) sightings by naked eye were logged during Polarstern Cruise PS107 (Tromsø - Tromsø) by the nautical officer on duty using a customized Software package (WALOG, WhAleLOGger) installed on a touch screen laptop located on the ship's bridge. Species were identified by naked eye or handheld binoculars (7x50) to the lowest possible taxonomical level and assigned a “certainty” level of identification. The number of animals were counted if possible or estimated for larger groups. Whenever identification to species level was not possible, the next identifiable taxonomical category was assigned. Information on sighting position, date and time are automatically transferred from the ship's DAVIS-Ship System (https://dship.awi.de/) to the WALOG software at the time of logging. Photographs were taken if possible for retrospective analysis. All data of acquired sightings were retrospectively validated by a marine biologist and converted to a standard format. To this end, plausibility of sighting time, location, standardization of species names, eventual comments added at the time of sighting, as well as additional information such as photographs (if available) were checked either to verify or improve species identification. Datasets are used in species distribution modelling and to inform interested parties about occurrences. : Date/Time is given in UTC. Certainty of identification: definite if observer clearly identified the species. The number of individuals is binned according to the options given in the data acquisition software: 1, 2, 3, less equal 5, less equal 10, greater than 10, greater than 20. More precise values may exist, due to observer comments. |
format |
Dataset |
author |
Burkhardt, Elke |
author_facet |
Burkhardt, Elke |
author_sort |
Burkhardt, Elke |
title |
Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
title_short |
Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
title_full |
Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
title_fullStr |
Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
title_full_unstemmed |
Whale sightings during POLARSTERN cruise PS107 (ARK-XXXI/2) |
title_sort |
whale sightings during polarstern cruise ps107 (ark-xxxi/2) |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2020 |
url |
https://dx.doi.org/10.1594/pangaea.924587 https://doi.pangaea.de/10.1594/PANGAEA.924587 |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_relation |
https://dx.doi.org/10.2312/bzpm_0717_2018 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.924587 https://doi.org/10.2312/bzpm_0717_2018 |
_version_ |
1766219305933864960 |