ANOOP KUMAR REPRODUCTION AND REGENRATION IN SPONGES.pptx

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 1 ST 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