Post-release spatial and social behaviour of translocated male Alpine ibexes (Capra ibex ibex) in the eastern Italian Alps

Scillitani, Laura; Sturaro, Enrico; Menzano, A.; Rossi, Luca; Viale, Chiara; Ramanzin, Maurizio

doi:10.1007/s10344-011-0596-9

Cited by 20 publications

(16 citation statements)

References 31 publications

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“…However, these increased movements did not result in higher emigration rates by translocated tortoises because rates of site fidelity were similar between treatments, and all telemetered translocated tortoises present at the end of the study were within the intended release area. Greater post‐release movements of translocated individuals compared to residents are common in wildlife translocation studies (Hester et al , Nussear et al , Scillitani et al ). These movements are likely due to disorientation, attempts to return to the donor site, or searches for suitable habitat or familiar environmental cues (Stamps and Swaisgood , Dickens et al , Bennett et al ).…”

Section: Discussionmentioning

confidence: 99%

“…Translocated tortoises would have had to dispersed only 250 m from the enclosure to achieve a density of 0.81 per ha, which is similar to the mean density reported for several sites across southern Georgia (0.75 per ha; Smith et al ); yet, our median displacement distance was 652 m. Tuberville et al () used enclosure densities of 12–13 per ha but observed the greatest movement distances with unenclosed tortoises. Using high tortoise densities within pre‐release enclosures actually may be beneficial because social interactions among translocated individuals (Tuberville et al ) may enhance population integration (Scillitani et al , ; Bennett et al ).…”

Section: Discussionmentioning

confidence: 99%

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Comparison of movements, body weight, and habitat selection between translocated and resident gopher tortoises

Bauder¹,

Castellano²,

Jensen

et al. 2014

Jour. Wild. Mgmt.

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Gopher tortoises (Gopherus polyphemus) are among the most frequently translocated herpetofauna; yet, determining translocation success is difficult because tortoises are slow‐growing, long‐lived organisms with low reproductive potential. Comparing behavioral traits of translocated individuals with those of sympatric or nearby resident individuals can provide an ecologically relevant baseline to determine if translocated individuals show behavioral traits consistent with those of long‐term residents. We used radio telemetry to concurrently monitor 21 translocated and 15 resident gopher tortoises across 2 sites in southern Georgia and compared movement patterns, body weights, and multi‐scale habitat selection between treatments. Translocated tortoises moved farther and had larger home ranges than resident tortoises but showed similar patterns of site fidelity. We observed no differences in body weight change between treatments. Patterns of habitat selection were similar between treatments in that tortoises selected structurally open habitats at all scales. Our study suggests that more extensive post‐release movements compared to resident individuals may not necessarily lead to lower site fidelity in translocated individuals. We suspect that the presence of structurally suitable habitat within the release area and retaining translocated individuals within a pre‐release enclosure for 10 months contributed to high site fidelity. Although comparing translocated and resident individuals can help inform translocation efforts, we caution that using resident individuals from ecological sinks may lead to misleading results. © 2014 The Wildlife Society.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of movements, body weight, and habitat selection between translocated and resident gopher tortoises

Bauder¹,

Castellano²,

Jensen

et al. 2014

Jour. Wild. Mgmt.

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“…Largescale movements by translocated caribou may be, in part, due to their inexperience with the landscape or an attempt to reach their native home range (Stamps and Swaisgood 2007;Scillitani et al 2013). Translocated Alpine ibex (Capra ibex ibex) had larger home range sizes than residents until 1 to 2 years post-translocation (Scillitani et al 2012). Similarly, elk translocated from Alberta to Ontario dispersed 20-140 km from the release site (Rosatte et al 2007).…”

Section: Seasonalitymentioning

confidence: 99%

The temporal niche and seasonal differences in predation risk to translocated and resident woodland caribou (Rangifertaranduscaribou)

2017

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https://mc06.manuscriptcentral.com/cjz-pubs translocated caribou tended to occupy low-elevation habitats extensively used by cougars, resulting in predation of eight translocated caribou, six of which were by cougars. We concluded that the translocated caribou did not adopt the predator avoidance strategies of resident caribou, rendering them more vulnerable to cougars. We make recommendations for future herd augmentations.

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“…Translocation, which is used to establish, re-establish, augment, or mitigate populations in decline, has yielded varied results across a broad range of taxa. Translocations have been used with fishes (Sheller et al 2006, Vincenzi et al 2012, birds (Reynolds et al 2012, White et al 2012, mammals (Van Houtan et al 2009, Scillitani et al 2012, Shier and Swaisgood 2012, and herpetofauna (Nelson et al 2002, Nussear et al 2012. For reptiles and amphibians, translocations have had limited success for some species, with survival rates of translocated animals ranging from 14% to 42% (Griffith et al 1989, Dodd and Seigel 1991, Fischer and Lindenmayer 2000, Germano and Bishop 2009.…”

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confidence: 99%

The effects of homing and movement behaviors on translocation: Desert tortoises in the western Mojave Desert

et al. 2014

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Translocation of threatened or vulnerable species is a tool increasingly used for conservation and management. However, in some species, homing and movement behaviors may undermine the success of translocation efforts. For the federally protected Agassiz's desert tortoise (Gopherus agassizii), translocation is a strategy used to manage declining populations, yet homing behavior in this species is poorly understood. To explore homing behavior and movement patterns after translocation, we radio tracked 80 tortoises during a 2‐phase experimental translocation. Phase 1 included 40 tortoises that were translocated, then monitored for a period of 37 days (21 Sep–28 Oct 2009), and phase 2 included a different group of 40 tortoises that were translocated and then monitored for 186 days (13 Apr–20 Oct 2010). In both phases, we assigned tortoises randomly to 1 of 3 treatment groups: translocated (displaced 2, 5, or 8 km from their source location), handling control, or control. After translocation, 20% of the translocated tortoises were able to navigate to their source location, and translocation distance had an effect on their ability to navigate home. We found 44% of tortoises in the 2‐km translocated group returned home; 1 tortoise in the 5‐km group, and no tortoises in the 8‐km translocated group returned. The time required to reach home ranged from 5 to 37 days for the 2‐km group, and 34 days for the 5‐km group. We deemed tortoises to have homed successfully if they returned to their source location within 37 days of translocation as this reflected the duration of phase 1 and allowed for a balanced comparison between the 2 phases. We found that translocated tortoises moved at least 1.5 times more overall than the control groups, with some individuals moving >10 km from the translocation site. These patterns persisted even after accounting for seasonal and sex differences in distance traveled. By identifying homing behaviors and quantifying post‐translocation movement patterns, this experiment addressed a key data gap in tortoise behavior that may limit the efficacy of tortoise translocation efforts. Our results point to the need to account for behavioral responses of tortoises to minimize risk to translocated individuals and maximize the success of translocation projects. © 2014 The Wildlife Society.

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Post-release spatial and social behaviour of translocated male Alpine ibexes (Capra ibex ibex) in the eastern Italian Alps

Cited by 20 publications

References 31 publications

Comparison of movements, body weight, and habitat selection between translocated and resident gopher tortoises

Comparison of movements, body weight, and habitat selection between translocated and resident gopher tortoises

The temporal niche and seasonal differences in predation risk to translocated and resident woodland caribou (Rangifertaranduscaribou)

The effects of homing and movement behaviors on translocation: Desert tortoises in the western Mojave Desert

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