Fisheries Level 1 semester 2 FGG-103 [ Physico-chemical Limnology] Question 2012- 2019

 

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 Hajee Mohammad Danesh Science and Technology University. Dinajpur B. Se. Fisheries (Hons.) Level 1 Semester II (July-December) Final Examination 2017 Course Title: Physico-chemical Limnology

Course Code: FMG 103 Credit Hours: 3.0

Full Marks: 90

Split answering of any question is unacceptable Use separate answer script for answering each of the sections.

The figure in the right margin indicates the marks for respective questions

Give the diagram where necessary,

Time: 3 Hours

Section-A

3-15-45

2

10

3.

Answer any three (03)

(a) Define limnology and physico-chemical limnology.

(b) Limnology is a synthetic science explain it.

(c) Describe the historical development of limnology

2(a) Define pH, salinity, alkalinity and hardness of a waterbody?

(b) pH is an indicator of a waterbody-Explain it

Describe different factors that are affecting the pH level of a waterbody.

3. (a) What are the sources of nitrogen and phosphorus in a water body?

(b) Enlist the forms of nitrogen and phosphorus occurred in a lake. c) Describe the sulfur and carbon cycle in a lake.

(a) What is an estuary?

(b) Categorize the zones of a marine waterbody according to salinity level. (c) Classify the estuary on the basis of water discharge.

(d) Describe the chemical properties of an estuar