Pumas also avoided walking down steeply declining slopes directly (mean declining path angle − 8.3 ± 0.1o, median = − 6.3o).
i wonder why?
15 Matching Annotations
- Nov 2023
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movementecologyjournal.biomedcentral.com movementecologyjournal.biomedcentral.com
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The mean V˙O2 \dot{V}{\mathrm{O}}_2 of pumas at rest was 8.22 ± 1.09 mlO2kg− 1 min− 1, and increased with treadmill speed (in m s− 1) (Fig. 3a) where the least-squares fitted regression
i think it's very helpful that the researchers included their equations and numbers. this makes it easier to follow along!
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Three adult pumas (n = two males, one female, body mass = 65.7±4.4 kg), that originated as cubs from the wild, were hand-reared and trained using operant conditioning methods over 10 months to walk in a metabolic chamber mounted on a motorized treadmill.
can you explain this in more detail?
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onlinelibrary.wiley.com onlinelibrary.wiley.com
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if we want to understand the processes that generate worldwide diversity, we must first understand the processes that generate overall mountain diversity.
this is a great way to end off the study done
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FIGURE 1
this makes it easy to visualize
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we found that species richness increased faster towards the equator and was better predicted by latitude in mountains than in lowlands
this makes sense as a warmer climate would have an increase in species richness
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- Oct 2023
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onlinelibrary.wiley.com onlinelibrary.wiley.com
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Because predation accounts for approximately 80% of nest failure
I never realized how much nest failure is due to predation, 80% is a lot!
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It is therefore unsurprising that ornithologists have embraced the use of video cameras to unambiguously identify nest predators
The use of cameras to identify nest predators is valuable for research, conservation, as well as education.
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Endotherm-specialist snakes (Elaphe and Pituophis genera) were more likely to depredate nests in forests and the canopy relative to other snakes, due to their affinity for edge habitat
Edge habitats often have a greater diversity and abundance of small mammals and birds, which are the primary prey for these snakes. Additionally, edge habitats can offer snakes more opportunities for camouflage
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www.tandfonline.com www.tandfonline.com
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The deposition of nitrate and phosphate rich animal’s dung in turn increases the level of these nutrients in the river water
It surprised me how the researchers didn't discuss how the elevated nitrogen and phosphorus levels affected their diversity index.
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Rivers and streams show signs of surprising phenomena with physical, cultural and psychological expression in life of human beings; they bring life and death, civilization and devastation, opportunity and risks and also used as shelter and feeding opportunities for a wide range of organisms like fish, insects, plants, mollusks, birds and mammals
Rivers are very multifaceted! They aren't just bodies of water, but they are dynamic environments!
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Shannon diversity index (H’) varied between 0.14 and 0.80
We just learned about the Shannon diversity index in lab!
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- Sep 2023
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academic.oup.com academic.oup.com
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Despite a large literature on the ontogeny of animal behavior, our understanding of behavioral development in young songbirds remains relatively poor
You would think that there would be tons of research about behavioral development for such a common bird.
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Like many fledgling behaviors, activity rates are a function of intrinsic and extrinsic factors of the post-fledging period
This highlights the relationship between an organism's "biological programming" and the external pressures it goes through during a vulnerable phase of its life.
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Our findings suggest that the ontogeny of activity rates in songbirds is likely an adaptation of fledglings to reduce their chances of being preyed on by predators that cue in on movement to find and capture prey
This highlights the idea that even seemingly mundane aspects of an organism's behavior (such as activity levels) can be finely tuned through evolution.
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