Biology is the science of living things. The word biology is derived from the Greek bios meaning’’ life’’ and logos’’ the study of’’. All knowledege about living things study on the biology. Biologists think of two main subdivision of biology- botany, the study of plant , and zoology ,the study of animals.other biologists feel that there are really three types of organisms- plants, animals and microorganisms- and consider microbiology to be a major subdivision of biology.
the animals of two bio-ecological and agro-ecological zones of
B.Sc. (Honours) Part- III Examination-2008
Zoology Course: Zool.-HE-341
Department of Zoology
University of Rajshahi
All the admiration to Allah the most Merciful and Beneficent Who has enabled me to submit this report on excursion 2009.
I express my most sincere gratitude and indebtedness to our field work coordinators and examination committee chairman Prof. Dr. Ismat Ara Ali madam. Also extended thanks and gratefulness to other members of the committee as Prof. Dr. Md. Abdul Mannan sir, Prof. Dr. Md. Sowdagor Mahafujar Rahman sir, Dr. Saiful Islam Faruki sir.
Especial thanks to Prof. Dr. Md. Abdus Salam sir who act as a guardian and leader of our excursion team and I am very much thankful to him for his friendly behave and presence with us for completing a successful tour.
I extended my thanks and gratefulness to Prof. Dr. Md. Abdul Mannan sir for his kind co-operation by giving us important information during our whole study period.
I wish to express my profound sense of gratitude and appreciation to Dr. Anjuman Ara Ali madam, Prof. Dr. Selina Parween madam and Prof. Dr. Abdus Salam Bhuiyan sir for joining with our excursion team and for their friendly behave to us.
I would like to thanks to our sir Dr. Monirrujjam Sorkar who introduced us about ecology and ecological zones of Bangladesh. He holds this class before excursion and we got benefit.
I also thanks to Md. Monowar Hossain (Biplob) bhai and Md.Golam Mostofa bhai for their helping mentality which made us oblige to them.
I must have to thank the bus driver and helpers for their cordial help to make the journey pleasant and successful.
I would like to thanks my friends for their constant inspiration and coordination in excursion.
We went to excursion to know about zones of Bangladesh and animals are found in these zones. We gain knowledge about bio-diversity and ecosystem. After observing the Barind tract, estuarine of Padma and Mohanonda, Himalyan Piedmont Plain, Active Tista Floodplain and surroundings we have achieved practical knowledge which broadens our theoretical knowledge. Volahat Resom Bejagar, Babudying, Dhamurhat forest, bird collection in museum of Dinajpur Govt. College, Banglabandha, enclave of Angorpota and Dhahogram, Rangpur Carmichiel College and many other places. We observed little number of zones of Bangladesh. So to increase our out look as part of our syllabus work we had visited those places. We had completed this tour successfully through obeying the advices of our honorable teachers.
Hippocampus sea horse brood pouch fish
Hippocampus is mainly live in tropical and temperate water,marine water particularly in India, Bangladesh, and Atlantic sea, Japan, Malay, Archipelago and China.
Systematic position of Dentalium
Phylum : Mollusca.
Genus : Dentalium
Habit and habitat:
Dentalium is marine. In shallow waters to depth they are found. Living partly buried obliquely in the mud and sand. The pointed foot protrudes from the larger ventral end of the shell for use in burrowing. Continue reading Description of Dentalium ( Elephant’s Tooth Shell)
GENERAL CHARACTERISTICS OF MOLLUSCA
- Body is short and partially or wholly enclosed by a fleshy outgrowth of the body wall called mantle.
- A shell if present secreted by the mantle and of one, two or eight parts.
- Head and ventral muscular foot closely allied with foot variously modified for crawling, burrowing , swimming, or foot capture.
- Digestive system complete, complex, with ciliary tracts for sorting small particles, mouth with radula bearing transverse rows of minute chitinous teeth, anus opening in mantle cavity.
- Circulatory is open type.
- Respiration by ctenidia (gills).
- Nervous system typically a circumesophageal nerve ring with various pairs of ganglia and two pairs of nerve cords.
- Sexes usually separated