scholarly journals Contributions to the knowledge of macroalgae of the Gerlache Strait - Antarctica

2021 ◽  
Vol 50 (SuplEsp) ◽  
pp. 213-220
Author(s):  
Natalia Rincón ◽  
Erasmo Macaya ◽  
Sara Guzmán
Keyword(s):  
Marine Macroalgae ◽  
Underwater Video ◽  
Video Recordings ◽  
Oceanographic Conditions ◽  
Coastal Research ◽  
Research Institute

This research is a contribution to the knowledge of some marine macroalgae species collected during the “Admiral Padilla” (2016-2017) and “Admiral Campos” (2018-2019) scientific expeditions, in which the Marine and Coastal Research Institute-Invemar participated with the project “Biodiversity and Oceanographic Conditions of the Gerlache Strait-Biogerlache-Antartica”. Samples were taken using a Shipek dredge; and underwater video recordings were made with a ROV (Remote Operated Vehicle). Six (6) species were identified: four (4) Rhodophyta and two (2) Ochrophyta-Phaeophyceae. Depth and zonation information where the macroalgae were found is included, and their relationship with previous records for the study area.

СИСТЕМЫ СТАЦИОНАРНОГО ПОДВОДНОГО ВИДЕОНАБЛЮДЕНИЯ ПРИБРЕЖНЫХ АКВАТОРИЙ

2020 ◽  
Author(s):  
V.K. Fishchenko ◽  
P.S. Zimin ◽  
A.V. Zatserkovnyy ◽  
A.E. Subote ◽  
A.V. Golik ◽  
...  
Keyword(s):  
Marine Biology ◽  
Surveillance Systems ◽  
Underwater Video ◽  
Vital Activity ◽  
Geographically Dispersed ◽  
Video Recordings ◽  
Underwater Cameras ◽  
The Pacific ◽  
External Conditions ◽  
Marine Vessels

В Тихоокеанском океанологическом институте (ТОИ) ДВО РАН с 2012 г. ведутся разработки и исследования возможностей технологий стационарного подводного видеонаблюдения. Развернуты три подводныхкомплекса: два в бухте Алексеева (о-в Попова) и один в бухте Витязь (зал. Посьета). К настоящему времени накоплены значительные объемы информации в виде моментальных снимков и видеозаписей подводныхсцен. Разработаны интерфейсы для предоставления этой информации пользователям по каналам сети Интернет. Разработаны технологии поддержки работы территориально разнесенных экспертов, составляющихбиологические описания видеоматериалов, подобных тем, которые разрабатываются в ведущих зарубежныхорганизациях по морской биологии. Разработаны и апробированы методики оценивания по видеоинформации параметров жизнедеятельности некоторых видов морских гидробионтов. Благодаря непрерывностинаблюдения зафиксировано нескольких редких случаев, представляющих интерес для морских биологов. Разработаны и апробированы методики оценивания гидрологических характеристик среды на основе анализавидеотрансляций с подводных камер. Эти результаты представляются важными в контексте сопровождениянаблюдений за жизнедеятельностью морской биоты данными о внешних условиях, в которых она происходит. Продемонстрирована возможность использования звукового канала камер для регистрации и анализаакустических шумов от морских судов. Продемонстрирована возможность применения подводных видеокомплексов для организации экспериментов по изучению реакции морских гидробионтов на воздействие целенаправленных физических сигналов.Since 2012, the Pacific Oceanological Institute of FarEastern Branch of the Russian Academy of Science has beendeveloping and studying the capabilities of technologies ofstationary underwater video surveillance. Three of the underwatercomplexes have been deployed in different waterareas: two in the Alekseev Bay (Popova Island) and one inVityaz Bay (Posyet Gulf). At this point, complexes have accumulateda significant amount of data in the form of snapshotsand video recordings of underwater scenes, which canbe accessed through designed Internet-based interfaces. Allthe surveillance systems contain technologies as a support ofthe work of geographically dispersed experts involved in thebiological description of video materials, similar to ones developedin leading worldwide marine biology organizations.Besides, the estimation of vital parameters of some marinelife species by the video recordings can be performed usingdeveloped and tested methods. Thanks to continuous observation,the designed systems have already recorded severalrare cases of interest for marine biologists. Hydrologicalcharacteristics of surrounding media can be studied usingdeveloped and tested methods of analysis of video streamingfrom underwater cameras. These results are especially crucialfor accompanying observations of the vital activity ofmarine organisms with data on external conditions in whichthey occur. Cameras built-in audio channels can be used forrecording and analyzing noises of marine vessels. Designedunderwater video complexes provide an opportunity forconducting experiments on studying the reaction of marineorganisms to dedicated physical signals.

scholarly journals Reviewer Acknowledgements

2019 ◽  
Vol 7 (2) ◽  
pp. 71
Author(s):  
Maggie Liu
Keyword(s):  
Peer Review ◽  
Science And Technology ◽  
The Philippines ◽  
Environmental Biology ◽  
Aquatic Science ◽  
Nova Southeastern University ◽  
National University ◽  
Coastal Research ◽  
Research Institute

Aquatic Science and Technology (AST) would like to acknowledge the following reviewers for their assistance with peer review of manuscripts for this issue. Many authors, regardless of whether AST publishes their work, appreciate the helpful feedback provided by the reviewers. Their comments and suggestions were of great help to the authors in improving the quality of their papers. Each of the reviewers listed below returned at least one review for this issue.Reviewers for Volume 7, Number 2 Augusto E. Serrano, University of the Philippines Visayas, PhilippinesAyman El-Gamal, Coastal Research Institute, EgyptDavid Kerstetter, Nova Southeastern University Oceanographic Center, USALevent BAT, Sinop University Fisheries Faculty, TurkeyLuciana Mastrantuono, Department of Environmental Biology, ItalyTai-Sheng Cheng, National University of Taiwan, TaiwanMaggie LiuAquatic Science and TechnologyMacrothink Institute*************************************5348 Vegas Dr.#825Las Vegas, Nevada 89108United StatesTel: 1-702-953-1852 ext. 524Fax: 1-702-420-2900E-mail: [email protected]: http://ast.macrothink.org

scholarly journals Benthic wildlife underwater video recording during longline survey in Weddell Sea

2020 ◽  
pp. 75-83
Author(s):  
P. Zabroda ◽  
◽  
L. Pshenichnov ◽  
D. Marichev ◽  
◽  
...  
Keyword(s):  
Video Recording ◽  
Species Abundance ◽  
Euphausia Superba ◽  
Wide Distribution ◽  
Weddell Sea ◽  
Northwestern Part ◽  
Underwater Video ◽  
Spawning Site ◽  
Research Survey ◽  
Video Recordings

Non-extractive method for the benthic wildlife study using the underwater video system (UVS) recording was provided during the research survey with the bottom longline in the northwestern part of the Weddell Sea. At the longline survey stations the data on wind direction and speed, state of the sea, air temperature, cloudiness, ice concentration, atmospheric pressure, precipitation, depth and coordinates of the anchor setting, direction of the longline set also were collected. It was found that the UVS with additional light during video recording does not disturb the animal behavior at depths of 700–1100 m in the study area. Three UVS observations have been described. The slope of the northwestern part of the Weddell Sea can be considered as spawning site of squid (Slosarczykovia circumantarctica). The data indicate wide distribution of Antarctic krill (Euphausia superba) and Antarctic jonasfish (Notolepis coatsi) in the area. The high density of the adult Antarctic jonasfish in a single place has never been recorded before. Preliminary observations and analysis of video recordings showed that the shooting lighting andobservation distance are sufficient for observing and identifying animals, their behavior and movement. This technique will allow estimating the relative species abundance and size distribution.

Attempted Ambush Predation on Spawning Squids LoligoVulgaris Reynaudii by Benthic Pyjama Sharks, PorodermaAfricanum, off South Africa

1995 ◽  
Vol 75 (3) ◽  
pp. 739-742 ◽  
Author(s):  
Malcolm J. Smale ◽  
Warwick H. H. Sauer ◽  
Roger T. Hanlon
Keyword(s):  
South Africa ◽  
Rocky Reef ◽  
Underwater Video ◽  
Loligo Vulgaris ◽  
Video Recordings ◽  
Behavioural Interactions ◽  
Ambush Predation

This first description of behavioural interactions between benthic pyjama sharks Poroderma africanum (Chondrichthyes: Scyliorhinidae) and spawning squids Loligo vulgaris reynaudii (Cephalopoda: Loliginidae) was made from underwater video recordings. The behaviours are described and illustrated to show that the sharks searched for squids in egg beds, then rested there partially hidden and immobile. The pyjama sharks at-tempted to ambush the squids when they approached to lay their eggs after they had apparently habituated to the predators. Although normally nocturnal, the pyjama sharks had emerged by day from caves and cracks in the rocky reef to attack the spawning squids, thereby benefiting from an occasionally available resource.

scholarly journals Fish and squid behaviour at the mouth of a drop-chain trawl: factors contributing to capture or escape

2016 ◽  
Vol 73 (6) ◽  
pp. 1545-1556 ◽  
Author(s):  
Shannon M. Bayse ◽  
Michael V. Pol ◽  
Pingguo He
Keyword(s):  
Video Analysis ◽  
Cape Cod ◽  
Underwater Video ◽  
Summer Flounder ◽  
Paralichthys Dentatus ◽  
Video Recordings

Abstract Underwater video recordings in the mouth of a squid trawl were used to evaluate the effectiveness of a trawl configured with drop-chain groundgear to catch longfin inshore squid (Doryteuthis pealeii) and reduce bycatch of finfish in the Nantucket Sound squid fishery off Cape Cod, Massachusetts, USA. Entrance through the trawl mouth or escape underneath the fishing line and between drop chains was quantified for targeted squid, and two major bycatch species, summer flounder (Paralichthys dentatus) and skates (family Rajidae). Additionally, contact and impingement between animals and groundgear were also quantified. Fish and squid swimming behaviours, positions, orientations, and time in the trawl mouth were quantified and related to capture or escape at the trawl mouth. Squid entered the trawl singly and in schools, and no squid were observed escaping under the fishing line. Most squid entered the trawl in the upper portion of the trawl mouth; mantle orientated away from the trawl and swimming in the same direction, and were gradually overtaken, not actively attempting to escape. Summer flounder and skates were observed to remain on or near the seabed, orientated, and swimming in the same direction as the approaching trawl. The majority (60.5%) of summer flounder entered the trawl above the fishing line. Summer flounder that changed their orientation and turned 180° were significantly more likely to enter the trawl (p < 0.05). Most skates (89.7%) avoided trawl entrance and escaped under the fishing line. Neither squid nor summer flounder were observed to make contact or become impinged to the groundgear; however, 35.4% of skates had substantial contact with groundgear, with 12.3% becoming impinged. Video analysis results showed that the drop-chain trawl is effective at retaining targeted squid while allowing skates to escape. However, it is ineffective at avoiding the capture of summer flounder.

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