My Name is Anoop kumar I am Student of Central University of Uttarakhand ( HNBGU )

1. HEMVATI NANDAN BAHUGUNA
GARHWAL UNIVERSITY
SRT CAMPUS BADSHAHITHAUL
DEPARTMENT OF ZOOLOGY
TOPIC: REPRODUCTION AND
REGENRATION IN SPONGES
PAPER: ANIMAL DIVERSITY
SUBMITTED BY : ANOOP KUMAR
M.Sc. ZOOLOGY 1ST SEM
ROLL NO: 25

2. REPRODUCTION AND
REGENERATION IN SPONGES
• POINTS TO BE DISCUSSED:
• INTRODUCTION
• ASEXUAL REPRODUCTION IN SPONGES
• SEXUAL REPRODUCTION IN SPONGES
• REGENRATION IN SPONGES
• SUMMARY

3. INTRODUCTION
• Pieces of sponge are able to regenerate and reproduce
into new sponges
• Mainly by asexual reproduction and sexual reproduction.
• In asexual occurs by budding and fragmentation.
• In sexual reproduction mainly sponges are
hermaphroditic.
• Sponges are mainly fresh and marine water.

4. ASEXUAL REPRODUCTION
• Asexual reproduction mainly by ; Budding, Fission,
embryo like Reduction Bodies and Gemmules

5. BUDDING
• Individual increased in sponges colonies.
• New colonies are developed.
• Archaeocytes collect at the surface and pinacoderm bulges
out to receive them
• Thus , bud formed into new new individual.

6. FISSION
• Multiplication takes place by fission in sponges by throwing
off parts of the body.
• Hypertrophied over a limited area .
• Then splitting occurs and part is separated from parent and
form a new individual.

7. GEMMULES
• All freshwater and marine sponges Ficulina, Tethya have
reproduction by internal buds called gemmules.
• Eventually detach and develop into new individuals
• Enable the sponges to tide over unfavourable contidition.

8. REDUCTION BODIES
• Most freshwater and marine sponges disintegrate in
adverse circumstances.
• Sponge like ailing collapse small rounded balls called
reduction bodies.
• Under favourable condition these bodies develop into
sponges.

9. SEXUAL REPRODUCTION
• Most sponges are monoecious but dioecious sponges are
also known.
• Choanocytes or archeocytes undergo gametogenesis.
• Fertilization takes place in situ.
• Choanocytes act as a nurse cells.
• Development takes place in leading to formation of larval
stages .

10. DEVELOPMENT OF LARVA OF
SPONGES
AMPHIBLASTULA
• Hollow, oval larval stage
(eg: Scypha.)
PARENCHYMULA
• Solid , oval or flattened
larval stage.

11. REGENRATION IN SPONGES
• Demonstrated by H.V Wilson (1907).
• Sponges have high capacity of regenration.
• If condition are favourable each piece carrying amoebocytes
can develop into full sponge.

12. REFERENCE
• ANIMAL DIVERSITY(R.L KOTPAL) ;FIRST EDITION
RASTOGI PUBLICATION(2018).
• https://www.studyandscore.com/studymaterial-
detail/phylum-porifera-sexual-and-asexual-
reproduction-in-sponges-and-regeneration-in-sponges