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A preliminary analysis of death cause, capture-related mortality, and survival of adult red deer in northwestern Patagonia Ecología austral
Flueck,Werner T; Smith-Flueck,Joanne M; Bonino,Never A.
The red deer (Cervus elaphus), among the world´s 14 most invasive exotic mammals, has recently arrived in Patagonia. Forty-seven deer were captured, marked with radio collars, and monitored in order to determine survival rates and identify causes of death. Net gunning from a helicopter allowed captures to be evenly distributed through the study area and in a timely manner. The absence of capture related mortality in our study agrees with previously reported low rates for this method. Animals were monitored for periods ranging from 5 to 2611 days. Ten animals provided censored values due to radio failures or being shot: they survived on average 811 days (SE = 221) after capture. Ten animals experienced natural deaths with an average time alive after capture...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Invasion; Cervus elaphus; Puma concolor; Predation; Disease; Radio telemetry; Population dynamics; Capture by net gunning.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2005000100004
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Movement and longitudinal distribution of a migratory fish ( Salminus brasiliensis) in a small reservoir in southern Brazil Neotropical Ichthyology
De Fries,Lucas; Hahn,Lisiane; Meneses,Bruna Arbo; Câmara,Luís Fernando da; Becker,Fernando Gertum; Hartz,Sandra Maria.
ABSTRACT We investigated whether the movement and distribution of the migratory fish, Salminus brasiliensis, were affected by a small reservoir. We also examined how movement and distribution were related to water temperature, flow, and rainfall. In December 2011 and January 2012, 24 individuals were captured downstream from the dam, tagged with radio transmitters and released in the reservoir (5.46 km² total area). After being released in the reservoir, 18 of the 24 tagged fish travelled upstream, taking an average of 16.6 days to leave the reservoir, with daily movements varying from < 5 km/day to > 24 km/day. However, only seven tagged specimens (29.16%) returned to the lower reservoir section, while the rest remained in the intermediate and upper...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental impact; Fragmentation; Habitat use; Hydroelectric power; Radio telemetry.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300202
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Movement patterns and home range in Diplomystes camposensis (Siluriformes: Diplomystidae), an endemic and threatened species from Chile Neotropical Ichthyology
Oyanedel,Alejandra; Habit,Evelyn; Belk,Mark C.; Solis-Lufí,Katherin; Colin,Nicole; Gonzalez,Jorge; Jara,Alfonso; Muñoz-Ramírez,Carlos. P..
ABSTRACT We document movement patterns and home range of Diplomystes camposensis, an endemic and threatened freshwater catfish from Chile. We tracked the movements of seven individuals of different body size (13.5 to 19 cm SL) using portable radio telemetry equipment to investigate movement patterns in relation to day/night activity and habitat use in the San Pedro River (Valdivia Basin). Tracked movements and model-based analyses revealed that D. camposensis has a large home range and high mobility. The average home range was 0.068163 ± 0.033313 km2, and the average area of higher activity was 0.005646 ± 0.011386 km2. The mean linear home range was 387.4 m. The results also showed that movements were longer during the night, supporting nocturnal habits....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endangered species; Fragmentation; Habitat use; Kernel; Radio telemetry.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100222
Registros recuperados: 3
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