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Showing posts with label animals. Show all posts
Showing posts with label animals. Show all posts

Friday, August 16, 2013

Civet cat, Bird poop and Bat: flavors of Coffee!!!



         

The aroma of the coffee itself can give you a feeling of warmth. Coffee lovers definitely enjoy the heavenly feeling while sipping the hot coffee in the chilling winter. Well.. there is a type of coffee with a fame of world’s expensive coffee. And that is Civet Cat Coffee or Kopi Luwak. “Kopi” is the Indonesian term for coffee. Luwak is a local name of the Asian Palm Civet in Sumatra. The retail price of this coffee is around US$800 per kilogram. Kopi luwak is produced mainly on the islands of Sumatra, Java, Indonesian Archipelago Bali, East Timor.
            Civet Cat Coffee has its origins from Indonasia. The history reaches back to 18th century the Dutch Colonialism in Java, Sumatra where Dutch prohibited native farmers from picking up coffee beans for their own use. Natives have learned that certain species of Luwak (Asian Palm Civets) consumed coffee cherries but excreted undigested coffee beans. So natives, in a desire to have famed coffee, picked coffee beans from feces of Luwak , then cleaned, roasted it lightly ground and prepared their coffee. So the fame of this unique felt flavor of coffee spread from natives to Dutch and then all over the world.   
            Asian Palm Civets are mammals native to Southeast Asia. They resemble long-nosed cats.  There are two mechanisms that improve the flavor of civet cat coffee viz selection and digestion. Asian palm civets love fresh coffee cherries. Civets move at night, sniffing out sweet red coffee cherries and select the ripest and best cherries. Hence occurs the selection of best cherries adding to coffee flavor. Civets chew the exterior of cherries and then swallow the bean. In the digestive track of civet fermentation of beans occur.  The proteolytic enzymes act on beans adding the flavor and breakdown the enzymes responsible for bitterness. It results in unique, pleasant, smooth flavor of coffee. These beans are excreted by civets which are collected and cleaned in hygienic way by farmers and roasted lightly. Though the beans are in contact with faces and pathogenic organisms, they contain negligible amounts of the enteric (pathogenic) organisms associated with feces.
            Similar to Civet cat coffee there is bird poop coffee, prepared from the coffee seeds found in the feces of the South African Jacu Bird. There is a new brand emerging from Costa Rica called Bat Coffee. Here the bats feed on the coffee cherries. The bats breaks the skin of the ripen cherries with their teeth. Bats feed upon the cherry pulp and lick the sugar-rich mucilage. So the actual beans of coffee are left on the tree, exposed to the sun and dried in natural way. Then these beans are handpicked and processed. Vietnamese entrepreneurs said that they have chemically treated the regular beans and have produced coffee of  the same luwak taste.
            Sharp rise in the demand for this luxurious civet cat coffee has affected its quality of making. It has been reported that civets are isolated and kept in small cages in awful condition and forcibly fed inferior beans such as Robusta. There is ethical concern pointing out in the whole process of making expensive coffee. On the other hand there may be a threat to wild varieties of civets. So when the demand surpasses the production, quality may drop and someday the natural process of making the civet cat coffee may fade away.

Thursday, June 27, 2013

Chameleons & Changing colors




Chameleons are lizards belonging to family called Chamaeleonidae. When we think of Chameleons, the first thing that strikes to mind is their ability to change colors.

Change of colour to camouflage!!! Not really!!!

It’s a popular belief that Chameleons change the color to blend with nature and to hide from predators. But camouflage is not the primary reason for change in skin color. Changing skin color in Chameleons is associated with various factors such as their reactions to temperature, light, mood, aggression, health, mating behavior.

Each chameleon species has its own color range. In general calm chameleons show green color. They exhibit darker colors like bright yellow to show their anger. It also serves the purpose of threatening others. Male chameleons when want to mate, show lighter, multicolored patterns.  Female chameleons show black with orange strips or dark brown color when they are carrying eggs. Chameleons become darker to absorb the heat effectively and show lighter grey color to reflect the light. A sick chameleon appears pale due to lack of sufficient energy to change color.

Chameleon’s skin is transparent and below which there are three layers of chromatophores - the specialized cells containing coloring pigments. First layer has xanthophores(yellow pigments) and erythrophores(red pigments). Second layer contains iridophores or guanophores with guanine, exhibiting blue or white color. Third layer has melanophores, (melanin pigment), and is responsible for the intensity of color.


Changing color phenomenon explained...
Coloring pigments are stored in vesicles inside chromatophores. Signals from nervous system or the chemical release in the blood stream initiates release of pigments from chromatophores. Vesicles containing pigments will release the pigment that alters the skin color of chameleon.  When these pigments distribute equally in the chromatophore, intensity of the color will be higher. But if the pigments are located at centre of chromatophores cells, then it looks almost transparent. So these specialized cells will direct sun light to specific pigments which in turn reflected back in different colors.


Only chameleons? We humans too!!!
Chameleons are not the only species to show this color changing phenomena. Cuttlefish is one more example for changing skin color. And we, human beings also change color though not prominently as chameleons. We turn red during anger or embarrassment and pale during shock and ill health.

Monday, February 11, 2013

Starfish




Starfish or sea stars are the fascinating creatures with unique appearance. They are the members of class Asteroidea. Starfish like stars attract us but they are not actually fishes. These marine animals are echinoderms.
There are over 1,800 species of sea stars, that vary in size, shape and color. Starfish contain hard plates made up of calcium carbonate beneath their skin. They contain special cells in skin that provide information about its surroundings.
 Unlike fishes starfish use their tiny tube feet to move along. Star fish have water vascular system that is helpful in movement and predation. They pump sea water into the body through a sieve plate or madreporite, and this water fills the  tube feet of starfish. So movement occurs by extending the filled tube feet and also muscles within the tube feet retract them. Tube feet also function as respiratory organs and assist in feeding and in sensory perception.
Most of the starfish varieties have five arms. They exhibit radial symmetry (which means that its components are arranged around a central axis in a symmetrical manner). Their mouth lies in the center on the underside. They feed mainly on clams and oysters.
Interesting fact about starfish is their ability to regenerate their lost arm. In few species the cut-off arm can even give rise to new starfish!!! But the regeneration process can take about one year.
These calm, tiny creature look simple but not so easy to care for. Like many marine aquarium inhabitants, starfish also require very specific care and water qualities to remain healthy.

Thursday, November 15, 2012

The Ants vs Humans : The graphical picture

A Wikipedia entry of 9 trillion kilograms of ants on earth.
A Reddit discussion leads to a result of 14.3 million to one ratio of ants to man.
Here is the graphical picture of the result.


Tuesday, September 18, 2012

Liliger

Tiger + Lion = Liger
Liger + Lion = Liliger
Look out the video for this hybrid breed...

Saturday, May 14, 2011

Largest Carnivores

Largest Carnivores is the southern elephant seal -Mirounga leonina
Weighing around 3000 to 4000 kgs (males) with a length around 7 metres





Heaviest terrestrial mammal

African Elephant-Loxodonto africana is the heaviest terrestrial mammal
Wt
7500kg
16534lb



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