Personal submersibles offer novel ecological research access to Antarctic waters: an example, with observations of the rarely encountered scyphozoan Stygiomedusa gigantea

Daniel M. Moore,

Anna Elina Flink,

Eva Prendergast,

Antony Gilbert

Опубликована Янв. 1, 2023

Underwater biological surveys have been conducted around the Antarctic continent for several decades, and our knowledge of the species present in the shallow waters (<50 m) is reasonably comprehensive. However, the waters below 50 m remain underexplored on the account of difficulty of access, financial barriers and relatively few operational platforms capable of deployment to such depths. Here, we demonstrate that personal submersibles, now increasingly deployed by the expedition cruise industry, can be vessels of opportunity for biological research in the polar regions. We describe direct observations of the rarely encountered scyphozoan Stygiomedusa gigantea at water depths of 80–280 …

Possible signs of recovery of the nearly extirpated Spitsbergen bowhead whales: calves observed in east Greenland

Outi M. Tervo,

Mikkel-Holger Strander Sinding,

Mads Peter Heide-Jørgensen,

Rikke G. Hansen,

Marie Louis

Опубликована Янв. 1, 2023

The Spitsbergen population of bowhead whales (Balaena mysticetus) was harvested to near extinction during the whaling era. Here, we show possible signs of recovery of the population by reporting observations of two calves in the Scoresby Sund polynya in East Greenland on 2 and 4 May 2022, and it is the first observation of this kind in this area since the early 1900s.

An observation of white whale (Delphinapterus leucas) mating behaviour in the wild

Christian Lydersen,

Kerstin Langenberger,

Kit M. Kovacs

Опубликована Янв. 1, 2023

Herein we describe mating behaviour observed in a group of 20 white whales in Svalbard, Norway. A single female was the centre of attention during the 45-minute encounter, which was observed, photographed and videotaped at an ice edge in Storfjorden in June 2022. Several males surrounded the female and vigorously herded her from all sides. The female spy-hopped regularly, and sometimes her whole body was pushed out of the water by the other animals. High tail-lifts and tail-slapping were frequently performed by males, and erect penises were observed many times. Trumpet calls were also heard. At one point, three males …

Perceptions of decision-makers about a potential forum of cooperation in the eastern part of the North American Arctic

Mathieu Landriault,

Jean-François Savard,

Anna Soer

Опубликована Янв. 1, 2023

Cooperation in the Arctic region has been fruitful in the past few decades, generating several multilateral organizations and forums covering the entire circumpolar North. In many cases, forums were created to serve as catalysts, bringing together decision-makers from different backgrounds in a conference setting to promote dialogue and the exchange of ideas. To enquire about the possibility of creating a forum of cooperation in the eastern North American Arctic, a total of five governmental officials from Canada, Denmark, Nunavut, Québec and Greenland, and one elected representative from Greenland were interviewed with the same set of five questions. The governmental officials …

Carbon exchange and primary production in a High-Arctic peatland in Svalbard

Takayuki Nakatsubo,

Mitsuru Hirota,

Ayaka W. Kishimoto-Mo,

Noriko Oura,

Masaki Uchida

Опубликована Янв. 1, 2023

Moss tundra with a thick peat layer dominated by bryophytes is one of the most important ecosystems in the High Arctic of Svalbard, but little is known about the carbon dynamics of moss tundra. Here, we estimated the net primary production (NPP) and net ecosystem production (NEP) of moss tundra on Brøggerhalvøya (Brøgger Peninsula) of north-western Svalbard (79°N). The net photosynthetic and respiration rates of the two dominant moss species, Calliergon richardsonii and Tomenthypnum nitens, were measured under laboratory conditions. On the basis of the photosynthetic and respiration characteristics and climatic data, we estimated the cumulative NPP of the dominant …