Definition: Any animal or plant spends a portion or all of its life cycle intimately associated with another organism of a different species is considered as symbiont or symbiote and the relationship is designated as symbiosis. By employing the term symbiosis, no intent is meant to emply the occurrence or mutual or unilateral metabolic dependency.
In order to facilitate understanding, four subordinate categories of symbiotic relationships are commonly distinguished. Under the broad heading of symbiosis, types of associations known as phoresis, commensalisms, parasitism, and mutualism should be identified.
1).Phoresis: The term phoresis means, “to carry”. During this type of relationship, that which is usually the smaller fo the two species- the phoront –is mechanically carried in or on the larger species – the host. No metabolic interaction or dependency occurs. An example of phoresis is the transport of bacteria on the legs of flies. The fly host provides only involuntary transportation for the bacteria.
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.