Effect of forest logging on food availability, suitable nesting habitat, nest density and spatial pattern of a Neotropical parrot

2022 ◽  
Vol 507 ◽  
pp. 120005
Author(s):  
L. Rivera ◽  
N. Politi ◽  
E.H. Bucher ◽  
A. Pidgeon
Birds ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 285-301
Author(s):  
Pizza Ka Yee Chow ◽  
James R. Davies ◽  
Awani Bapat ◽  
Auguste M. P. von Bayern

Food availability may vary spatially and temporally within an environment. Efficiency in locating alternative food sources using spatial information (e.g., distribution patterns) may vary according to a species’ diet and habitat specialisation. Hypothetically, more generalist species would learn faster than more specialist species due to being more explorative when changes occur. We tested this hypothesis in two closely related macaw species, differing in their degree of diet and habitat specialisation; the more generalist Great Green Macaw and the more specialist Blue-throated Macaw. We examined their spatial pattern learning performance under predictable temporal and spatial change, using a ‘poke box’ that contained hidden food placed within wells. Each week, the rewarded wells formed two patterns (A and B), which were changed on a mid-week schedule. We found that the two patterns varied in their difficulty. We also found that the more generalist Great Green Macaws took fewer trials to learn the easier pattern and made more mean correct responses in the difficult pattern than the more specialist Blue-throated Macaws, thus supporting our hypothesis. The better learning performance of the Great Green Macaws may be explained by more exploration and trading-off accuracy for speed. These results suggest how variation in diet and habitat specialisation may relate to a species’ ability to adapt to spatial variation in food availability.


2003 ◽  
Author(s):  
Kelly A. Digian ◽  
Michael Brown

2001 ◽  
Author(s):  
Michael F. Brown ◽  
Sue Yang ◽  
Kelly Digian

2019 ◽  
Vol 1 (02) ◽  
pp. 64-67
Author(s):  
Meilisha Putri Pertiwi ◽  
Suci Siti Lathifah

Research on the condition of the nesting habitat of Chelonia mydas (green turtle) in Pangumbahan Beach, Ujung Genteng, South Sukabumi has been carried out. Data retrieval is done 6 times for 2 days, 27-28 November 2017 at 3 observation stations. The abiotic parameters measured include surface temperature and depth of 50 cm, surface humidity and depth of 50 cm, beach width, beach slope, and the size of sand grains. While the biotic parameters measured were density, relative density, the frequency of attendance, and distribution patterns of Pandanus tectorius (sea pandanus) vegetation. Based on the results of data processing, the biophysical conditions in Pangumbahan Beach are still suitable for the Chelonia mydas nesting habitat. It also got clear evidence of the many Chelonia mydas landings during the data collection.


Jurnal Segara ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 99
Author(s):  
Hadiwijaya Lesmana Salim ◽  
Dini Purbani ◽  
Agustin Rustam ◽  
Yulius Yulius ◽  
Devi Suryono ◽  
...  

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