Effects of Substrate on Foraging Decisions by a Namib Desert Gerbil

1995 ◽  
Vol 76 (2) ◽  
pp. 638-645 ◽  
Author(s):  
J. J. Hughes ◽  
D. Ward ◽  
M. R. Perrin
Keyword(s):  
Namib Desert ◽  
Foraging Decisions ◽  
Desert Gerbil

scholarly journals C. elegans discriminates colors to guide foraging

Science ◽  
2021 ◽  
Vol 371 (6533) ◽  
pp. 1059-1063 ◽  
Author(s):  
D. Dipon Ghosh ◽  
Dongyeop Lee ◽  
Xin Jin ◽  
H. Robert Horvitz ◽  
Michael N. Nitabach
Keyword(s):  
Stress Response ◽  
Cellular Stress ◽  
Color Discrimination ◽  
Cellular Stress Response ◽  
Blue Pigment ◽  
Natural Environments ◽  
C Elegans ◽  
Evolutionarily Conserved ◽  
Foraging Decisions ◽  
Light Guides

Color detection is used by animals of diverse phyla to navigate colorful natural environments and is thought to require evolutionarily conserved opsin photoreceptor genes. We report that Caenorhabditis elegans roundworms can discriminate between colors despite the fact that they lack eyes and opsins. Specifically, we found that white light guides C. elegans foraging decisions away from a blue-pigment toxin secreted by harmful bacteria. These foraging decisions are guided by specific blue-to-amber ratios of light. The color specificity of color-dependent foraging varies notably among wild C. elegans strains, which indicates that color discrimination is ecologically important. We identified two evolutionarily conserved cellular stress response genes required for opsin-independent, color-dependent foraging by C. elegans, and we speculate that cellular stress response pathways can mediate spectral discrimination by photosensitive cells and organisms—even by those lacking opsins.

scholarly journals Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard

Ecosphere ◽  
2017 ◽  
Vol 8 (12) ◽  
pp. e02033 ◽  
Author(s):  
Sebastian Kirchhof ◽  
Robyn S. Hetem ◽  
Hilary M. Lease ◽  
Donald B. Miles ◽  
Duncan Mitchell ◽  
...  
Keyword(s):  
Climate Change ◽  
Thermal Preference ◽  
Namib Desert ◽  
Thermoregulatory Behavior ◽  
Impact Of Climate Change ◽  
Desert Lizard

Phylogeography of the Namib Desert dung beetles Scarabaeus (Pachysoma) MacLeay (Coleoptera: Scarabaeidae)

2004 ◽  
Vol 32 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Catherine L. Sole ◽  
Clarke H. Scholtz ◽  
Armanda D. S. Bastos
Keyword(s):  
Dung Beetles ◽  
Namib Desert

Predation Risk and Competition Affect Habitat Selection and Activity of Namib Desert Gerbils

Ecology ◽  
1994 ◽  
Vol 75 (5) ◽  
pp. 1397-1405 ◽  
Author(s):  
Jessica J. Hughes ◽  
David Ward ◽  
Michael R. Perrin
Keyword(s):  
Habitat Selection ◽  
Predation Risk ◽  
Namib Desert

Archaeological Evidence of Domestic Sheep in the Namib Desert During the First millennium AD

2016 ◽  
Vol 14 (1) ◽  
pp. 7-17 ◽  
Author(s):  
John Kinahan
Keyword(s):  
Southern Africa ◽  
Rock Art ◽  
Indirect Evidence ◽  
Domestic Sheep ◽  
Ritual Practice ◽  
Namib Desert ◽  
Broad Agreement ◽  
First Millennium ◽  
Changing Economy ◽  
Fundamental Shift

Bones of domestic sheep dated to the early first millennium AD are described from the Dâures massif in the Namib Desert. The remains confirm earlier investigations which inferred the acquisition of livestock from indirect evidence in the rock art, suggesting a fundamental shift in ritual practice at this time. Dating of the sheep remains is in broad agreement with the dating of other finds in the same area and in southern Africa as a whole. The presence of suspected sheep bone artefacts, possibly used for ritual purposes, draws attention to the importance of livestock as more than a component of diet in the changing economy of hunter-gatherer society.

Erosion of a granite inselberg, Gross Spitzkoppe, Namib Desert

Geomorphology ◽  
2013 ◽  
Vol 201 ◽  
pp. 52-59 ◽  
Author(s):  
A. Matmon ◽  
A. Mushkin ◽  
Y. Enzel ◽  
T. Grodek
Keyword(s):  
Namib Desert

Presence of Vesicular Bodies and Thick Basal Laminae in the Nephron of the Desert Gerbil Meriones crassus

1990 ◽  
Vol 137 (3) ◽  
pp. 261-271 ◽  
Author(s):  
Abdel Majeed Safer ◽  
Nada Al-Ajmi ◽  
Moudhi N. Bou-Resli
Keyword(s):  
Desert Gerbil
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