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Life Cycle of a FrogLife Cycle of a Frog

PRESENTEDPRESENTED


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Why some people Scared onWhy some people Scared on

frog?frog?

Some people are having a traumaSome people are having a trauma

on this kind of amphibians theon this kind of amphibians the

FROG, they think that frog isFROG, they think that frog is

like a monster but they did notlike a monster but they did notthink what is the role of the frogthink what is the role of the frog

why this frog exist. God not madewhy this frog exist. God not made

a creature without its purpose.a creature without its purpose.

Frog is the one who is responsibleFrog is the one who is responsible

to eat all the mosquito and otherto eat all the mosquito and other

flies. It has an important role inflies. It has an important role in

our wonderful world.our wonderful world.


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Thats the Life of a FrogThats the Life of a Frog


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True Love?True Love?


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True Love?True Love?

When Frogs mate, the male frog tends to claspWhen Frogs mate, the male frog tends to claspthe female underneath in an embrace calledthe female underneath in an embrace calledamplexusamplexus. He literally climbs on her back,. He literally climbs on her back,reaches his arms around her "waist", either justreaches his arms around her "waist", either justin front of the hind legs, just behind the frontin front of the hind legs, just behind the frontlegs, or even around the head. Amplexus canlegs, or even around the head. Amplexus canlast several days! Usually, it occurs in the water,last several days! Usually, it occurs in the water,though some species, like the bufos on the rightthough some species, like the bufos on the rightmate on land or even in trees!mate on land or even in trees!

While in some cases, complicated courtingWhile in some cases, complicated courtingbehavior occurs before mating, many species ofbehavior occurs before mating, many species of

frogs are known for attempting to mate withfrogs are known for attempting to mate withanything that moves which isn't small enough toanything that moves which isn't small enough toeat!eat!


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Spawn (egg-mass)Spawn (egg-mass)

While in the amplexus position, the maleWhile in the amplexus position, the malefrog fertilizes the eggs as they get are laid.frog fertilizes the eggs as they get are laid.Frogs tend to lay eggs single eggs inFrogs tend to lay eggs single eggs inmasses, whereas toads usually lay eggs inmasses, whereas toads usually lay eggs in

long chains.long chains.Some frogs leave after this point, butSome frogs leave after this point, butothers stick around to watch over the littleothers stick around to watch over the littleones. Some have very unusual ways ofones. Some have very unusual ways ofcaring for their young. You'll learn aboutcaring for their young. You'll learn about

some of those later in this tour!.some of those later in this tour!.


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EggEgg

Frogs and Toads tend to lay many many eggs because thereFrogs and Toads tend to lay many many eggs because thereare many hazards between fertilization and full grown frogare many hazards between fertilization and full grown frogness! Those eggs that die tend to turn white or opaque. Theness! Those eggs that die tend to turn white or opaque. Thelucky ones that actually manage to hatch still start out on alucky ones that actually manage to hatch still start out on ajourney of many perils.journey of many perils.Life starts right as the central yolk splits in two. It thenLife starts right as the central yolk splits in two. It thendivides into four, then eight, etc.- until it looks a bit like adivides into four, then eight, etc.- until it looks a bit like araspberry inside a jello cup. Soon, the embryo starts to lookraspberry inside a jello cup. Soon, the embryo starts to lookmore and more like a tadpole, getting longer and movingmore and more like a tadpole, getting longer and movingabout in it's egg.about in it's egg.Usually, about 6-21 days (average!) after being fertilized, theUsually, about 6-21 days (average!) after being fertilized, theegg will hatch. Most eggs are found in calm or static waters,egg will hatch. Most eggs are found in calm or static waters,to prevent getting too rumbled about in infancy!to prevent getting too rumbled about in infancy!Some frogs, like the Coast foam-nest tree frog, actually mateSome frogs, like the Coast foam-nest tree frog, actually matein tree branches overlooking static bonds and streams. Theirin tree branches overlooking static bonds and streams. Theiregg masses form large cocoon-like foamy masses. The foamegg masses form large cocoon-like foamy masses. The foam

sometimes cakes dry in the sun, protecting the insidesometimes cakes dry in the sun, protecting the insidemoisture. When the rain comes along, after development of 7moisture. When the rain comes along, after development of 7to 9 days, the foam drips down, dropping tiny tadpoles intoto 9 days, the foam drips down, dropping tiny tadpoles intothe river or pond below.the river or pond below.


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TadpoleTadpole

Shortly after hatching, the tadpole still feeds on theShortly after hatching, the tadpole still feeds on theremaining yolk, which is actually in its gut! Theremaining yolk, which is actually in its gut! Thetadpole at this point consists of poorly developedtadpole at this point consists of poorly developedgills, a mouth, and a tail. It's really fragile at thisgills, a mouth, and a tail. It's really fragile at thispoint. They usually will stick themselves to floatingpoint. They usually will stick themselves to floatingweeds or grasses in the water using little stickyweeds or grasses in the water using little sticky

organs between its' mouth and belly area. Then, 7organs between its' mouth and belly area. Then, 7to 10 days after the tadpole has hatched, it willto 10 days after the tadpole has hatched, it willbegin to swim around and feed on algae.begin to swim around and feed on algae.After about 4 weeks, the gills start getting grownAfter about 4 weeks, the gills start getting grownover by skin, until they eventually disappear. Theover by skin, until they eventually disappear. Thetadpoles get teeny tiny teeth which help them gratetadpoles get teeny tiny teeth which help them grate

food turning it into soupy oxygenated particles.food turning it into soupy oxygenated particles.They have long coiled guts that help them digest asThey have long coiled guts that help them digest asmuch nutrients from their meadger diets asmuch nutrients from their meadger diets aspossible.possible.By the fourth week, tadpoles can actually be fairlyBy the fourth week, tadpoles can actually be fairlysocial creatures. Some even interact and school likesocial creatures. Some even interact and school likefish!fish!


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Tadpole with legsTadpole with legs

After about 6 to 9 weeks, little tiny legsAfter about 6 to 9 weeks, little tiny legsstart to sprout. The head becomes morestart to sprout. The head becomes moredistinct and the body elongates. By nowdistinct and the body elongates. By nowthe diet may grow to include larger itemsthe diet may grow to include larger items

like dead insects and even plants.like dead insects and even plants.The arms will begin to bulge where theyThe arms will begin to bulge where theywill eventually pop out, elbow first.will eventually pop out, elbow first.After about 9 weeks, the tadpole looksAfter about 9 weeks, the tadpole looksmore like a teeny frog with a really long tail.more like a teeny frog with a really long tail.

It is now well on it's way to being almostIt is now well on it's way to being almostfull-grown!full-grown!


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Young Frog, orYoung Frog, orFrogletFroglet

By 12 weeks, the tadpole hasBy 12 weeks, the tadpole has

only a teeny tail stub and looksonly a teeny tail stub and looks

like a miniature version of thelike a miniature version of the

adult frog. Soon, it will leave theadult frog. Soon, it will leave the

water, only to return again to laywater, only to return again to lay

more eggs and start the processmore eggs and start the process

all over again!all over again!


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FrogFrog

By between 12 to 16 weeks, dependingBy between 12 to 16 weeks, dependingon water and food supply, the frog hason water and food supply, the frog hascompleted the full growth cycle. Somecompleted the full growth cycle. Somefrogs that live in higher altitudes or infrogs that live in higher altitudes or incolder places might take a whole wintercolder places might take a whole winter

to go through the tadpole stage...othersto go through the tadpole stage...othersmay have unique development stagesmay have unique development stagesthat vary from your "traditional" tadpole-that vary from your "traditional" tadpole-in-the-water type life cycle: some ofin-the-water type life cycle: some ofthese are described later in this tour.these are described later in this tour.Now these frogs will start the wholeNow these frogs will start the whole

process again...finding mates andprocess again...finding mates andcreating new froggies.creating new froggies.


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THANK YOU!THANK YOU!

THE END!THE END!

Presented by:Presented by:

Louie Fe DelapinaLouie Fe Delapina

louieneil2

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