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Just Crusin'
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| [Note Guidelines] Photographer's Note |
Declining Frogs
Frog populations throughout the world are continuing to decline despite the best efforts by scientists in more than 30 countries. Although the main cause of amphibian deaths has often been attributed to habitat destruction and fragmentation, pinpointing the causes of the decline is difficult because many causative factors interact and exacerbate the problems facing the frogs. Unfortunately, when mankind causes changes to the environment, the total effect may end up being more than the sum of the parts. Most frogs have a biphasic life cycle, in which eggs, laid in water, develop into tadpoles that metamorphose into tiny replicas of the adults. This fact, coupled with their being covered by a semi-permeable skin, makes frogs particularly vulnerable to pollutants and other environmental stresses. Consequently frogs can be used as environmental biomonitors. If something detrimental is happening to the frogs, we had better take notice, as they act as an early warning system for the health of our environment.
A recent hypothesis suggests that infection by an ancient chytrid fungus may be the common link in most amphibian declines. However, whether or not this is a novel pathogen, causing a lethal epidemic in frog populations around the globe, or simply the last straw in a long line of insults that the frogs have been subjected to in recent years, is still controversial.
IMAGE INFORMATION
Camera: Canon 1D Mklll
Time of day: 3:53 p.m.
Date: 10th January 2009
Weather conditions: Cloudy
Lens: Canon 70-200mm F/2.8L IS
Extender: Canon EF 2X II
Filter: Hoya 77mm UV
Shutter Speed: 1/160
F-Stop: F/6.3
Focal Length: 400mm
Support: Hand Held
ISO: 400
Original file type: Digital Raw |
Morigann, Miss_Piggy, lucasgalodoido has marked this note useful Only registered TrekNature members may rate photo notes. |
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Hello Pam,
this is a great shot with fine details and good DOF, and the low POV is very nice.
Well done
Pierre
Hallo Pam
Great capture of this frog with pleasant detail and clarity shown. The colours are earthy but really great and I like the big pop out eyes. The thin golden lining alongside the black pupils is eye-catching and cannot be missed. The direct eye contact is special. Thanks for sharing.
Best regards
Anna
very beautiful capture , amazing colours and good light , clear and perfect details , great DOF,
TFS,
septimiu
- PeterZ
(17102) - [2009-01-11 7:07]
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Hello Pam,
Fascinating photo from a perfect low POV. Splendid colours and impressive eyes. Very sharp focus, a beautiful environment and great DOF.
Regards,
Peter
Very nice shot of this frog Pam.
Great POV exposure and colour.
Nicely composed and a good note.
TFS
Steve
Hi Pam,
interesting this frog, and great qulity image, very nice.
Regards,
lucas