scholarly journals A Potential Nursing Ground for the Southern Right Whale Eubalaena australis in Northern Chile

2020 ◽  
Author(s):  
Ana M. García-Cegarra ◽  
Maritza Malebran ◽  
Koen Van Waerebeek
Keyword(s):  
Low Cost ◽  
Ease Of Use ◽  
Humpback Whales ◽  
Marine Spatial Planning ◽  
Northern Chile ◽  
Right Whale ◽  
Eubalaena Australis ◽  
High Resolution Images ◽  
Shipping Traffic

The Chile-Peru subpopulation (CPe) of the southern right whale (Eubalaena australis) is classified as critically endangered following intense whaling in past centuries. Due to their very low abundance, information on breeding and feeding grounds is also scarce. Unmanned aerial vehicles (UAVs) are increasingly applied in marine mammal research thanks to their low cost and relative ease of use. This case study documents a southern right whale nursing in Bahía Moreno (23ºS), Antofagasta, northern Chile, through high-resolution images taken by UAV of a lone adult in July 2019 and the same (photo-identified) whale with a neonate in August, confirming local parturition. Combined with earlier data we hypothesize that the Antofagasta Region may be a calving and nursing ground for the CPe subpopulation. Given the intense shipping traffic and fishing activities around the Mejillones Peninsula and Antofagasta port, priorly recommended marine spatial planning to help avoid net entanglements and vessel collisions of fin and humpback whales would also contribute to the conservation of the CPe stock of southern right whale.

scholarly journals Antofagasta Region in northern Chile, a potential nursing ground for the Southern right whale Eubalaena australis

2021 ◽  
Author(s):  
Ana Garcia Cegarra ◽  
Maritza Malebran ◽  
Koen Van Waerebeek
Keyword(s):  
Low Cost ◽  
Ease Of Use ◽  
Humpback Whales ◽  
Marine Spatial Planning ◽  
Northern Chile ◽  
Right Whale ◽  
Eubalaena Australis ◽  
High Resolution Images ◽  
Shipping Traffic

The Chile-Peru subpopulation (CPe) of the Southern right whale (Eubalaena australis) is classified as Critically Endangered following intense whaling in past centuries. Due to their very low abundance, information on breeding and feeding grounds is also scarce. Unmanned aerial vehicles (UAVs) are increasingly applied in marine mammal research thanks to their low cost and relative ease of use. This case study documents a Southern right whale nursing in Bahía Moreno (23º S), Antofagasta, in northern Chile through high-resolution images taken by UAV of an adult in July 2019 and the same whale with a neonate in August. Combined with earlier data we hypothesize that the Antofagasta Region may be a potential calving and nursing ground for the CPe subpopulation. Given the intense shipping traffic and fishing activities around the Mejillones Peninsula and Antofagasta port, priorly recommended marine spatial planning to help avoid net entanglements and vessel collisions of fin and humpback whales may also contribute to the conservation of the CPe stock.

Evaluation of Network RTK Performance and Elements of Certification—A Southern Ontario Case Study

GEOMATICA ◽  
2013 ◽  
Vol 67 (4) ◽  
pp. 243-251 ◽  
Author(s):  
S. Bisnath ◽  
A. Saeidi ◽  
J.-G. Wang ◽  
G. Seepersad
Keyword(s):  
Urban Areas ◽  
Low Cost ◽  
Ease Of Use ◽  
Reference Station ◽  
Southern Ontario ◽  
Network Rtk ◽  
Single Baseline ◽  
Commercial Network

Over the past decade, network RTK technology has become popular as an efficient method of precise, real-time positioning. Its relatively low-cost and single receiver ease-of-use has allowed it to mostly replace static relative GPS and single baseline RTK in urban areas where such networks are economically viable (e.g., cadastral and construction survey). The Ministry of Transportation of Ontario (MTO) and York University have investigated the performance of commercial network RTK services in Southern Ontario, where performance is defined by a set of developed metrics. It was found that the user horizontal solution had an overall precision of ∼2.5 cm (95%), though there were cases of solution biases, drifts and gaps. A follow-up study is developing criteria and pathways for the certification of such commercial network RTK services, focusing on: reference station integration, reference station maintenance, and user solution monitoring. A set of recommendations for network certification is in preparation.

scholarly journals Long-Term Storage of Small Natural History Specimens Using Gelatin Capsules: A Case Study from the Royal Alberta Museum

2018 ◽  
Vol 32 (1) ◽  
pp. 31-46
Author(s):  
Diana Tirlea ◽  
Carmen Li ◽  
Alwynne B. Beaudoin ◽  
Emily Moffat
Keyword(s):  
Continuous Monitoring ◽  
Low Cost ◽  
Ease Of Use ◽  
Gelatin Capsules ◽  
Long Term Storage ◽  
Pros And Cons ◽  
Storage Methods ◽  
Term Storage

Abstract Museums use gelatin capsules to store small objects and specimens, despite limited documentation of their long-term viability. The Royal Alberta Museum (RAM of Canada) uses gelatin capsules to store seeds, bones, and plant material because of their ease of use, transparency, soft-bodied walls, size availability, and low cost. Recently, RAM staff reported damaged capsules from the palaeontology collections. We evaluated 499 capsules used to store specimens accessioned in 1986 and 1988 and investigated capsule properties using Fourier transform infrared spectroscopy and Oddy testing. Only 4.21% of inspected capsules were dented, cracked, and/or fractured. Based on interviews and testing, we determined that damage to capsules likely resulted during handling (i.e., applied force when opening). We conclude that gelatin capsules offer a good, inexpensive method for long-term storage of small, dried specimens in environmentally controlled conditions. Alternatives to gelatin capsules exist, although their pros and cons require evaluation before use. All storage methods require continuous monitoring for signs of container or specimen deterioration.

Humpback whales Megaptera novaeangliae and southern right whales Eubalaena australis in Gerlache Strait, Antarctica

Polar Record ◽  
1988 ◽  
Vol 24 (148) ◽  
pp. 15-20 ◽  
Author(s):  
Gregory S. Stone ◽  
William M. Hamner
Keyword(s):  
Open Water ◽  
Euphausia Superba ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Southern Limit ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales ◽  
The Right

AbstractDuring surveys conducted 2–20 April 1986 in Gerlache Strait, Antarctic Peninsula, 103 humpback whales Megaptera novaeangliae and eight right whales Eubalaena australis were sighted. The right whale sightings extend the southern limit of known distribution for the species. Humpback and right whale densities were respectively 0.22 (sd 0.23) and 0.01 (sd 0.06) whales per survey mile. Highest densities for both species were recorded inside bays, rather than in the relatively open water of Gerlache Strait. Both species were feeding on Antarctic krill Euphausia superba. Twenty-three humpback and four right whales were identified individually using photographs of natural features. Also included are sighting records of 18 southern bottlenose whales Hyperoodon planifrons.

scholarly journals Radiation-damage-induced phasing: a case study using UV irradiation with light-emitting diodes

2016 ◽  
Vol 72 (3) ◽  
pp. 395-402 ◽  
Author(s):  
Daniele de Sanctis ◽  
Chloe Zubieta ◽  
Franck Felisaz ◽  
Hugo Caserotto ◽  
Max H. Nanao
Keyword(s):  
Radiation Damage ◽  
Disulfide Bonds ◽  
Light Emitting Diodes ◽  
Low Cost ◽  
Ease Of Use ◽  
X Rays ◽  
Light Emitting ◽  
Uv Lasers ◽  
Uv Leds

Exposure to X-rays, high-intensity visible light or ultraviolet radiation results in alterations to protein structure such as the breakage of disulfide bonds, the loss of electron density at electron-rich centres and the movement of side chains. These specific changes can be exploited in order to obtain phase information. Here, a case study using insulin to illustrate each step of the radiation-damage-induced phasing (RIP) method is presented. Unlike a traditional X-ray-induced damage step, specific damage is introducedviaultraviolet light-emitting diodes (UV-LEDs). In contrast to UV lasers, UV-LEDs have the advantages of small size, low cost and relative ease of use.

scholarly journals Combination of multi-agent systems and embedded hardware for the monitoring and analysis of diuresis

2017 ◽  
Vol 13 (7) ◽  
pp. 155014771772215 ◽  
Author(s):  
Gabriel Villarrubia ◽  
Daniel Hernández ◽  
Juan F De Paz ◽  
Javier Bajo
Keyword(s):  
Intelligent System ◽  
Kidney Diseases ◽  
Low Cost ◽  
Ease Of Use ◽  
Medical Professionals ◽  
Multi Agent Systems ◽  
Medical Centers ◽  
Multi Agent ◽  
Technological Tool

The early detection and monitoring of kidney disease continues being an important problem in medicine. The diagnosis and treatment of patients with this disease usually require expensive medical equipment that is difficult to install. Patients or medical centers may not always be able to afford such equipment. This work proposes the creation of a wireless sensor network for medical environments; it will assist medical professionals in the diagnosis and monitoring of patients with renal symptomatology. This work will focus on the analysis of symptoms that accompany this disease and the design of a system which will help determine types of kidney diseases. The proposed system will incorporate new hardware mechanisms and an intelligent system. It will be designed through a multi-agent architecture based on virtual organizations. This architecture will include a new model of agents, specifically designed to be incorporated into computationally limited devices. This hardware will be characterized by its low cost and ease of use. A case study has been carried out in order to validate the proposed architecture. In order to validate the proposed architecture, we designed a case study that aims to provide a technological tool for medical professionals and makes it possible to determine any diseases related to diuresis. The initial results are promising.

scholarly journals Have whales returned to a historical hotspot of industrial whaling? The pattern of southern right whale Eubalaena australis recovery at South Georgia

2020 ◽  
Vol 43 ◽  
pp. 323-339
Author(s):  
JA Jackson ◽  
A Kennedy ◽  
M Moore ◽  
A Andriolo ◽  
CCG Bamford ◽  
...  
Keyword(s):  
Visual Observation ◽  
Humpback Whales ◽  
Lower Latitude ◽  
The South ◽  
South Georgia ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Antarctic Waters ◽  
Skin Biopsies ◽  
Strong Contrast

Around 176500 whales were killed in the sub-Antarctic waters off South Georgia (South Atlantic) between 1904 and 1965. In recent decades, whales have once again become summer visitors, with the southern right whale (SRW) the most commonly reported species until 2011. Here, we assess the distribution, temporal pattern, health status and likely prey of SRWs in these waters, combining observations from a summertime vessel-based expedition to South Georgia, stable isotope data collected from SRWs and putative prey and sightings reports collated by the South Georgia Museum. The expedition used directional acoustics and visual surveys to localise whales and collected skin biopsies and photo-IDs. During 76 h of visual observation effort over 19 expedition days, SRWs were encountered 15 times (~31 individuals). Photo-IDs, combined with publicly contributed images from commercial vessels, were reconciled and quality-controlled to form a catalogue of 6 fully (i.e. both sides) identified SRWs and 26 SRWs identified by either left or right sides. No photo-ID matches were found with lower-latitude calving grounds, but 3 whales had gull lesions supporting a direct link with Península Valdés, Argentina. The isotopic position of SRWs in the South Georgia food web suggests feeding on a combination of copepod and krill species. Opportunistic reports of SRW sightings and associated group sizes remain steady over time, while humpback whales provide a strong contrast, with increased sighting rates and group sizes seen since 2013. These data suggest a plateau in SRWs and an increasing humpback whale presence in South Georgia waters following the cessation of whaling.

Low Temperature Fault Isolation Using Soft Defect Localization

2012 ◽  
Author(s):  
Kristopher D. Staller
Keyword(s):  
Low Temperatures ◽  
Laser Scanning ◽  
Low Cost ◽  
Fault Isolation ◽  
Laser Scanning Microscopy ◽  
Cold Temperature ◽  
Multiple Point ◽  
Defect Localization ◽  
Low Levels

Abstract Cold temperature failures are often difficult to resolve, especially those at extreme low levels (< -40°C). Momentary application of chill spray can confirm the failure mode, but is impractical during photoemission microscopy (PEM), laser scanning microscopy (LSM), and multiple point microprobing. This paper will examine relatively low-cost cold temperature systems that can hold samples at steady state extreme low temperatures and describe a case study where a cold temperature stage was combined with LSM soft defect localization (SDL) to rapidly identify the cause of a complex cold temperature failure mechanism.

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