scholarly journals Satellite telemetry reveals complex migratory movement patterns of two large macaw species in the western Amazon basin

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Donald J. Brightsmith ◽  
Janice D. Boyd ◽  
Elizabeth A. Hobson ◽  
C J. Randel
Keyword(s):  
Amazon Basin ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Migratory Movement

Movement patterns of female feral camels in central and northern Australia

2001 ◽  
Vol 28 (3) ◽  
pp. 283 ◽  
Author(s):  
Glenn P. Edwards ◽  
Stephen R. Eldridge ◽  
David Wurst ◽  
David M. Berman ◽  
Vanessa Garbin
Keyword(s):  
Kernel Method ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Annual Rainfall ◽  
Northern Australia ◽  
Buffer Zones ◽  
Movement Rates ◽  
Environmentally Sensitive Areas ◽  
Large Home Range ◽  
Pattern Of Variation

Movement patterns of female feral camels were studied over four years (February 1993 to December 1996) in central and northern Australia using satellite telemetry. Areas used over 12-month periods (calculated using the fixed kernel method) were large (449–4933 km 2 ) and increased with increasing aridity as measured by long-term mean annual rainfall. No consistent pattern of variation was detected in movement rates of camels across seasons. Data collected over several years are needed to classify movements in feral camels. The only telemetered camel that has been monitored for longer than two years (this study) appeared to move within a large home range over the concluding 3.5 years that it was tracked. Because the areas used are large, extensive buffer zones will be needed in arid regions to protect environmentally sensitive areas from the impacts of feral camels.

scholarly journals VERTICAL AND HORIZONTAL MOVEMENTS OF THE SCALLOPED HAMMERHEAD SHARK (SPHYRNA LEWINI) AROUND MALPELO AND COCOS ISLANDS (TROPICAL EASTERN PACIFIC) USING SATELLITE TELEMETRY

2016 ◽  
Vol 40 ◽  
Author(s):  
Sandra Bessudo ◽  
Germán A. Soler ◽  
Peter A. Klimley ◽  
James Ketchum ◽  
Randall Arauz ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
Movement Patterns ◽  
Eastern Pacific ◽  
Depth Range ◽  
Tropical Eastern Pacific ◽  
Sphyrna Lewini ◽  
Scalloped Hammerhead ◽  
Distribution Ranges ◽  
Cocos Island ◽  
Hammerhead Sharks

Understanding distribution ranges and the daily movement patterns of pelagic fishes are key aspects for the establishment and planning of protected areas for their conservation. In this study the vertical and horizontal movements of scalloped hammerhead sharks, Sphyrna lewini, were recorded in Malpelo and Cocos Island using satellite telemetry. Nine sharks were tagged with satellite transmitters during March 2006, 2007 and 2008 at Malpelo Island, and three hammerhead sharks were tagged at Cocos Island in June 2008. The sharks moved between islands in the Tropical Eastern Pacific and made regional movements from Malpelo to the south of Cocos and around the Malpelo ridge. When away from the island, sharks made infrequent nocturnal short dives down to 1000 m where temperatures were as low as 4 °C. For a shark that was tracked for five months, results indicated significant differences between the time spent at different depth ranges, as well as an interaction between depth, water layers, and the time of the day. The shark swam mostly at surface waters (0-10 m) during the cold water season, and spent more time at the deepest depth range (>100 m) during nigh time. Further long-term studies on shark movement patterns are required for a better management of this highly mobile and vulnerable species.

scholarly journals Movement and Home Range of Nile Crocodiles in Ndumo Game Reserve, South Africa

Koedoe ◽  
2015 ◽  
Vol 57 (1) ◽  
Author(s):  
Peter M. Calverley ◽  
Colleen T. Downs
Keyword(s):  
South Africa ◽  
Home Range ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Breeding Site ◽  
Water Levels ◽  
Home Ranges ◽  
Total Length ◽  
Game Reserve ◽  
Nile Crocodile

The study of movement patterns and home range is fundamental in understanding the spatial requirements of animals and is important in generating information for the conservation and management of threatened species. Ndumo Game Reserve, in north-eastern KwaZulu-Natal, bordering Mozambique, has the third largest Nile crocodile (Crocodylus niloticus) population in South Africa. Movement patterns of 50 Nile crocodiles with a total length of between 202 cm and 472 cm were followed over a period of 18 months, using mark-resight, radio and satellite telemetry. The duration of radio transmitter attachment (131 ± 11.4 days) was significantly and negatively related to total length and reproductive status. Satellite transmitters failed after an average of 15 ± 12.5 days. Home range was calculated for individuals with 10 or more radio locations, spanning a period of at least 6 months. There was a significant relationship between home range size and total length, with sub-adults (1.5 m – 2.5 m) occupying smaller, more localised home ranges than adults (> 2.5 m). The largest home ranges were for adults (> 2.5 m). Home ranges overlapped extensively, suggesting that territoriality, if present, does not result in spatially discrete home ranges of Nile crocodiles in Ndumo Game Reserve during the dry season. Larger crocodiles moved farther and more frequently than smaller crocodiles. The reserve acts as a winter refuge and spring breeding site for an estimated 846 crocodiles, which also inhabit the Rio Maputo during the summer months. Nile crocodile movement out of the reserve and into the Rio Maputo starts in November and crocodiles return to the reserve as water levels in the floodplain recede in May.Conservation implications: Movement patterns of Nile crocodiles show the important role the reserve plays in the conservation of Nile crocodile populations within the greater Ndumo Game Reserve–Rio Maputo area.

scholarly journals Evaluation of a satellite telemetry system for monitoring movements of caribou

Rangifer ◽  
1986 ◽  
Vol 6 (2) ◽  
pp. 73 ◽  
Author(s):  
James A. Curatolo
Keyword(s):  
Satellite Telemetry ◽  
Movement Patterns ◽  
Transmission Time ◽  
Telemetry System ◽  
Detailed Data ◽  
Radio Transmitter ◽  
Direct Observations ◽  
Calving Season

A cow caribou from the Central Arctic Herd was collared with a satellite-monitored radio transmitter in the Kuparuk Oilfield, Alaska, in 1984. From 19 June to 17 August, the radio transmitted 18 hours per day. A total of 346 locations were recorded, for a mean of 5.8 locations per day or one location every 3.1 hours of transmission time. The location of 13 direct observations of the radio-collared cow averaged less than 1 km from the nearest satellite-fixed location. The satellite-fixed locations of the radio-collared cow provided detailed data on movement patterns during the three seasons studied. The cow traveled an average of 8 km day1, 23 km1, and 14 km day1 during the post-calving season, mosquito season, and oestrid fly season, respectively.

Key habitats and movement patterns of Pechora Sea walruses studied using satellite telemetry

Polar Biology ◽  
2019 ◽  
Vol 42 (9) ◽  
pp. 1763-1774 ◽  
Author(s):  
V. Semenova ◽  
A. Boltunov ◽  
V. Nikiforov
Keyword(s):  
Satellite Telemetry ◽  
Movement Patterns

scholarly journals First Insights Into the Horizontal Movements of Whale Sharks (Rhincodon typus) in the Northern Arabian Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Lucy M. Arrowsmith ◽  
Charan Kumar Paidi ◽  
Farukhkha Husenkha Bloch ◽  
Sajan John ◽  
Binod Chandra Choudhury ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Rapid Development ◽  
Satellite Telemetry ◽  
Movement Patterns ◽  
Small Scale ◽  
Human Populations ◽  
Western Coast ◽  
Tag Retention ◽  
Northern Arabian Sea ◽  
Whale Sharks

Whale sharks off the western coast of India have suffered high levels of fishing pressure in the past, and today continue to be caught in small-scale fisheries as by-catch. Additionally, coastlines in this region host very large and growing human populations that are undergoing rapid development. This exacerbates ongoing anthropogenic threats to this species such as pollution, habitat loss, and ship traffic. For these reasons, there is an urgent need for data on movement patterns of whale sharks in this region of the Indian Ocean. Here, we address this issue by providing the first data on the horizontal movements of whale sharks tagged in the northern Arabian Sea off the western coast of the Indian state of Gujarat. From 2011 to 2017, eight individuals, ranging from 5.4 to 8 m were tagged and monitored using satellite telemetry. Tag retention varied from 1 to 137 days, with the sharks traveling distances of 34 – ∼2,230 km. Six of the eight individuals remained close to their tagging locations, although two sharks displayed wide ranging movements into the Arabian Sea, following frontal zones between water masses of different sea surface temperatures. We explore the relationship between the movement patterns of these whale sharks and the physical and biological processes of the region.

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