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84 results for “foraging activity”
Figure 2 in Into the light: atypical diurnal foraging activity of Blyth's horseshoe bat, Rhinolophus lepidus (Chiroptera: Rhinolophidae) on Tioman Island, Malaysia
Figure 2: IN situ image and characteristic features of the day-flying bats of Tioman Island, Malaysia. (A) Day-flying insectivorous bat flying a low circuit in Paya, Tioman Island, Malaysia. (B and C) Frontal and lateral views of diurnal RHiNOlOpHus lepidus displaying characteristic features of the species, i.e. pointed lancelet with concave sides, triangular connecting process and hair with light tips.
FIG. 3 in Disentangling Morphological and Environmental Drivers of Foraging Activity in an Invasive Diurnal Gecko, Phelsuma laticauda
FIG. 3. Relationship between sex and SM.Avg. Whiskers extend no further than ±1.5X interquartile range, with data beyond that plotted individually.
FIG. 6 in Disentangling Morphological and Environmental Drivers of Foraging Activity in an Invasive Diurnal Gecko, Phelsuma laticauda
FIG. 6. (A) Position of Phelsuma laticauda on lizard FM spectrum as determined by PTM. Based on the cutoffs determined by Huey and Pianka (1981), with PTM <10% = SW forager and PTM> 30% = AF, P. laticauda is a classic SW forager along with Crotaphytus collaris and Oligosoma grande (Eifler and Eifler, 1999; Cooper et al., 2001). FMs with PTM 10–25% represent intermediate FMs, such as the ''cruise foraging'' of Chameleo jacksonii (Hagey et al., 2010). Many lacertids and teiids, such as Nucras tessellata and Aspidocelis uniparens, lie on the upper end of the spectrum (Huey and Pianka, 1981; Cooper et al., 2001). (B) Position of P. laticauda on gecko FM spectrum as determined by PTM. Most SW geckos have a PTM <5%, such as Chondrodactylus turneri and Gonatodes ocellatus (Persuad et al., 2003; Cooper, 2007). The majority of other geckos have a PTM> 10% (many of which have been classified as AF even though none come close to the extremely high PTMs of many AF lizards outside of the Gekkota infraorder), such as Goniurosaurus orientalis and Coleonyx Ʋariegatus (Kingsbury, 1989; Werner et al., 2004). Within geckos, P. laticauda is a more active SW forager, verging on the intermediate values of species such as Teratoscincus scincus (Seligmann et al., 2007).
Figure 3 in Quantification of underwater calling and foraging activities in the African clawed frog Xenopus laevis
Figure 3. Effects of moonlight intensity, along with lunar cycle, on A) Vocal activity, B) Foraging activity as estimated as the number of animals captured in food baited traps and C) sex ratio of captures (number of males/ total number of individuals), with points for observed values, and 95% confidence interval around the mean estimated from the best model.
Figure 2 in Quantification of underwater calling and foraging activities in the African clawed frog Xenopus laevis
Figure 2. Variations of A) Vocal activity, B) Foraging activity as estimated as the number of animals captured in food baited traps and C) sex ratio of captures (number of males/ total number of individuals), during the study period, according to date and lunar cycle with points for observed values, and 95% confidence interval around the mean estimated from the best model.
Data from: Foraging activity pattern is shaped by water loss rates in a diurnal desert rodent
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Data from: Netted crop covers reduce honey bee foraging activity and colony strength in a mass flowering crop
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Data from: Geographical variation in ant foraging activity and resource use is driven by climate and net primary productivity
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Data From: Breeders are less active foragers than non-breeders in wild Damaraland mole-rats
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Data from: Contrasting patterns of gene flow for Amazonian snakes that actively forage and those that wait in ambush
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Data from: Assessing the effects of human activities on the foraging opportunities of migratory shorebirds in Austral high-latitude bays
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Data from: Pollination on the dark side: acoustic monitoring reveals impacts of a total solar eclipse on flight behavior and activity schedule of foraging bees
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Data from: Foraging actively can be advantageous in heterogeneous environments
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Data from: Active foraging for toxic prey during gestation in a snake with maternal provisioning of sequestered chemical defenses
Many animals sequester dietary defensive compounds and incorporate them into the offspring, which protects the young against predation. One possible but poorly investigated question is whether females of such species actively prey upon toxic diets. The snake Rhabdophis tigrinus sequesters defensive steroids from toads consumed as prey; it also feeds on other amphibians. Females produce chemically armed offspring in direct proportion to their own level of toad-derived toxins by provisioning the toxins to their eggs. Our field observations of movements and stomach contents of radio-tracked R. tigrinus showed that gravid snakes preyed upon toads by actively foraging in the habitat of toads, even though toads were a scarce resource and toad-searching may incur potential costs. Our Y-maze experiments demonstrated that gravid females were more likely to trail the chemical cues of toads than were males or non-gravid females. These results showed behavioural switching in females and active foraging for scarce, toxic prey during gestation. Because exploitation of toads by gravid females results in their offspring being more richly endowed with prey-derived toxins, active foraging for toxic prey is expected to be an adaptive antipredator trait, which may enhance chemical defence in offspring.
Data from: Collective response of leaf-cutting ants to the effects of wind on foraging activity
One advantage of sociality is to mitigate environmental restrictions through collective behavior. Here we document a colony-level response of leaf-cutting ants to wind, an environmental factor that impedes foraging. Given that larger ants adhere more strongly to the substrate, increasing forager size in windy conditions should reduce the negative effect of wind. We tested this idea for Acromyrmex lobicornis in windy regions of Patagonia. We examined (1) whether the fraction of larger ants versus smaller ants increased in windy conditions and (2) whether the effect of wind on the ants' movement was lower for larger ants. The size-frequency distribution of foragers was skewed more toward larger ants in nature under more windy conditions. Under windy conditions in the field, the mobility of smaller ants was more reduced than that of larger ants. The change toward larger foragers in windy conditions reduced the negative effect of wind by 32%, illustrating how a social organism can collectively mitigate the adverse effects of the environment.
Figure 3 in Diurnal time-activity budget and foraging techniques of red-crested pochards (Netta rufina) wintering at the wetlands of West Bengal, India
Figure 3. Month-wise and time-wise proportional time budget of the RCPs. Values are given in percentages of the time spent in the diurnal activities (mean value ± SD; n = 32; 96-h observation).
Figure 1 in Foraging mode of Australolacerta rupicola (FitzSimons, 1933) (Sauria: Lacertidae): evidence of seasonal variation in an extremely active predator?
Figure 1. Typical microhabitat of Australolacerta rupicola in Sample Plot 1. Credit: S. Kirchhof.
Figure 3 in Foraging mode of Australolacerta rupicola (FitzSimons, 1933) (Sauria: Lacertidae): evidence of seasonal variation in an extremely active predator?
Figure 3. Typical microhabitat of Australolacerta rupicola in Sample Plot 3. Credit: S. Kirchhof.
Figure 2 in Foraging mode of Australolacerta rupicola (FitzSimons, 1933) (Sauria: Lacertidae): evidence of seasonal variation in an extremely active predator?
Figure 2. Typical microhabitat of Australolacerta rupicola in Sample Plot 2. Credit: S. Kirchhof.
Figure 2 from: Hodge S, Prasad A (2013) Factors influencing the foraging activity of the allodapine bee Braunsapis puangensis on creeping daisy (Sphagneticola trilobata) in Fiji. Journal of Hymenoptera Research 35: 59-69. https://doi.org/10.3897/jhr.35.6006
Figure 2 - Braunsapis puangensis activity from 7am to 6pm on a single Sphagneticola trilobata patch at The University of the South Pacific, Laucala Campus (individuals counted in 30 s; mean ± SE, n = 5). Observations were made during sunny weather in April 2011, and during sunny and rain conditions in May 2011.
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