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Registros recuperados: 7
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Behavioral responses of humpback whales, Megaptera novaeangliae (Cetacea: Balaenopteridae), to satellite transmitter deployment procedures Rev. Bras. Zool.
Alves,Luiz Cláudio P. de S.; Moreira,Sérgio; Simões-Lopes,Paulo C.; Andriolo,Artur.
Tagging whales with implantable satellite transmitters creates the possibility of disturbing the animals. Between 2003 and 2005, behavioral observations of humpback whales during tag deployment operations were conducted off the coast of Brazil from the flying bridge of a speedboat. The speed achieved by each whale during pursuit was registered by GPS receivers onboard two inflatable zodiac boats. Respiratory frequencies were significantly lower (n = 15, p < 0.05) before (mean = 0.89 ± 0.06 blows/min) compared with after (1.39 ± 0.15) tagging. The same effect was observed for the speed of each animal (mean = 10.96 ± 0.44 km/h and 12.54 ± 0.57 km/h; n = 13, p < 0.05). Both variables were positively correlated with the duration of the pursuit (n = 21, r...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavior; Respiratory frequency; Satellite telemetry.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100001
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Homing in green turtles Chelonia mydas: oceanic currents act as a constraint rather than as an information source ArchiMer
Girard, Charlotte; Sudre, Joël; Benhamou, Simon; Roos, David; Luschi, Paolo.
As open sea navigators, green turtles Chelonia mydas have to deal with oceanic currents. These currents may have a mechanical influence, forcing turtles away from their desired course, but they may also provide information to navigating turtles by bringing chemical cues down-current from their target area. In the present paper, we have introduced new path analysis methods, coupling remote-sensing oceanographic data and satellite-tracking data in order to test these hypotheses. These methods were exemplified on the homing routes of 3 green turtles nesting on Europa, an isolated island in the southern part of Mozambique Channel. The turtles, displaced by ship east-southeast from Europa, returned to their nesting island in 13 to 59 d, following long,...
Tipo: Text Palavras-chave: Sea turtle; Satellite telemetry; Oceanography; Navigation; Homing; Current drift.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1984.pdf
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Movement of southern elephant seals (Mirounga leonina L.) from Elephant Is. South Shetlands, Antarctica BABT
Muelbert,Mônica M. C.; Robaldo,Ricardo B.; Martínes,Pablo E.; Colares,Elton P.; Bianchini,Adalto; Setzer,Alberto.
In 1999, at-sea activity of two young southern elephant seal males (Mirounga leonina) from Elephant Is. (61º13'S, 55º23'W), Antarctica, was monitored and tracked for 9 months. The individuals were randomly selected, captured, sedated (Zoletil 50®- 1mg/kg), weighed, measured, bled, paint-marked and fitted with satellite tags (STDR - ST-6PPT, Telonics®, USA). Deployment of the STDR took about 45 min since each animal had a lower incisor tooth extracted for age determination. The seals exhibited individual behaviors. Seal "V"-23842 (BM ~ 801kg) moved from Elephant Is. (61.2ºS 55.3ºW) in Jan. 1999 to King George Is. (62.2ºS 58.1ºW) in Feb. 1999 when the tag stopped signaling. Seal "T"-23843 (BM ~ 656 kg) was restricted to the area around Elephant Is. (61.2ºS...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mirounga leonina; Southern elephant seals; Satellite telemetry; Antarctica; At-sea activity.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300017
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Oceanic survival and movements of wild and captive-reared immature green turtles (Chelonia mydas) in the Indian Ocean ArchiMer
Pelletier, Dominique; Roos, David; Ciccione, Stéphane.
The ability of captive-reared turtles to survive in the wild is not precisely known, nor are movements of immature turtles in the open ocean. To provide information on these issues, a satellite tracking experiment was conducted in the western Indian Ocean to monitor oceanic movements of immature green turtles. Two wild turtles and four captive-reared individuals were tracked. The latter had been displaced after birth from nesting sites to a distant rearing site. Wild turtles survived after release, but did not move far away from release site. We hypothesize that this resident behaviour may be explained by stage-specific habitat requirements. Captive-reared turtles survived after release and migrated over thousands of kilometres. Among these, the oldest...
Tipo: Text Palavras-chave: Indian Ocean; Captive reared; Migration pattern; Satellite telemetry; Chelonia mydas; Marine turtle.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-573.pdf
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Regional movements of the tiger shark, Galeocerdo cuvier, off northeastern Brazil: inferences regarding shark attack hazard Anais da ABC (AABC)
HAZIN,FÁBIO H.V.; AFONSO,ANDRÉ S.; CASTILHO,PEDRO C. DE; FERREIRA,LUCIANA C.; ROCHA,BRUNO C.L.M..
An abnormally high shark attack rate verified off Recife could be related to migratory behavior of tiger sharks. This situation started after the construction of the Suape port to the south of Recife. A previous study suggested that attacking sharks could be following northward currents and that they were being attracted shoreward by approaching vessels. In this scenario, such northward movement pattern could imply a higher probability of sharks accessing the littoral area of Recife after leaving Suape. Pop-up satellite archival tags were deployed on five tiger sharks caught off Recife to assess their movement patterns off northeastern Brazil. All tags transmitted from northward latitudes after 7-74 days of freedom. The shorter, soak distance between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Migration; Recife; Satellite telemetry; Shark attack; Suape.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301053
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VERTICAL AND HORIZONTAL MOVEMENTS OF THE SCALLOPED HAMMERHEAD SHARK (SPHYRNA LEWINI) AROUND MALPELO AND COCOS ISLANDS (TROPICAL EASTERN PACIFIC) USING SATELLITE TELEMETRY Boletín de Investigaciones
Bessudo,Sandra; Soler,Germán A.; Klimley,Peter A.; Ketchum,James; Arauz,Randall; Hearn,Alex; Guzmán,Adriana; Calmettes,Beatriz.
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Satellite telemetry; Vertical and horizontal movements; Sphyrna lewini; Malpelo; Cocos.
Ano: 2011 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612011000300005
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What do humpback whales Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) pairs do after tagging? Rev. Bras. Zool.
Andriolo,Artur; Zerbini,Alexandre N.; Moreira,Sergio; Pizzorno,José L.; Danilewicz,Daniel; Maia,Ygor G.; Mamede,Natália; Castro,Franciele R. de; Clapham,Phillip.
The social structure of humpback whales in their tropical wintering grounds is very fluid. To date, no information has been published for cases in which two whales were both satellite-tagged while in association. Here, we report the movements of four humpback whale pairs tagged together off the coast of Brazil. Fieldwork and satellite tagging of humpback whales was conducted between 2003 and 2008 along the eastern coast of Brazil, between 20°S and 8°S. Movement was monitored while whales were still in their breeding ground. A switching state space model was applied to the filtered data of each humpback whale to standardize telemetry data and allow direct comparison of each individual track. GIS was used to plot model-predicted locations and to visually...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cetacean; Large whale; Satellite telemetry; Social behavior; SSSM.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000200001
Registros recuperados: 7
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