Benthic Community Variability at Himchori Beach Point, Cox’s Bazar: In Relations with
Sediment Characteristics
Md. Shafikul Alam
Roll No. 0118/02 Registration No. 583
Session: 2018-2019
A thesis submitted in the partial fulfillment of the requirements for the degree of Master of Science in Marine Bioresource Science
Department of Marine Bioresource Science Faculty of Fisheries
Chattogram Veterinary and Animal Sciences University Chattogram-4225, Bangladesh
JUNE 2020
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AUTHORIZATION
For the authorization I hereby declare that I am the sole author of the thesis. I authorize the Chattogram Veterinary and Animal Sciences University (CVASU) to lend this thesis to other institutions or individuals for the purpose of scholarly research. I further authorize the CVASU to reproduce the thesis by photocopying or by other means, in total or in part, at the request of other institutions or individuals for the purpose of scholarly research.
I, undersigned, and author of this work, declare that the electronic copy of this thesis provided to the CVASU Library, is an accurate copy of the print thesis submitted, within the limits of the technology available.
(Md. Shafikul Alam)
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Benthic Community Variability at Himchori Beach Point, Cox’s Bazar: In Relations with
Sediment Characteristics
Md. Shafikul Alam
Roll No. 0118/02 Registration No. 583
Session: 2018-2019
This is to certify that we have examined the above Master’s thesis and have found that, is completed and satisfactory in all respects, and that all revisions required by the thesis
examination committee have been made
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Supervisor
Co-supervisor
--- Chairman of the Examination Committee Department of Marine Bioresource Science
Department of Marine Bioresource Science Faculty of Fisheries
Chattogram Veterinary and Animal Sciences University Khulshi, Chattogram-4225, Bangladesh
JUNE 2020
(Prof. Dr. Mohammed Nurul Absar Khan) (Abrar Shakil)
(Dr. Mohammad Sadequr Rahman Khan)
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Acknowledgment
I am indebted to Almighty Allah who enabled me with courage, strength and patience to complete the research work and write up the dissertation successfully within due time of course.
I would like to convey my sincere thanks and gratitude to my supervisor Prof. Dr.
Mohammed Nurul Absar Khan, Dean, Faculty of Fisheries, CVASU for his valuable supervision and guidance. It was really a great pleasure and amazing experience for me to work under his supervision. I really deemed it and I realized it was an opportunity for me to work under his creative guidance.
It's my pleasure to convey my profound gratitude to my co-supervisor Abrar Shakil, Assistant Professor , Dept. of Marine Bioresource Science, CVASU for his valuable advice, scholastic guidance, suggestions and inspiration. I am greatly indebted to Dr. Md.
Asaduzzaman, Assistant Professor, Dept. of Marine Bioresource Science, CVASU for his encouragement and cooperation at every stage of this study from its inception to completion.
It's my pleasure to convey my profound gratitude to Dr. Mohammad Sadequr Rahman Khan Assistant Professor and Head, Dept. of Marine Bioresource Science, CVASU for his valuable advice, scholastic guidance, suggestions and inspiration
I sincerely express deepest sense of gratitude and indebtedness to Faculty of Fisheries and University administration for following me working in faculty laboratory and financial support to complete my research.
I am also grateful to Avijit Talukdar , Assistant Professor, Department of Marine Bioresource Science, CVASU for their inspiration, technical support and kind suggestion during the research work.
I am also acknowledging the Lab assistant, Technicians and supporting staffs of Oceanography lab, Faculty of Fisheries, Chattogram Veterinary and Animal Sciences University (CVASU) for their help during sample examination in the laboratory.
Last but not least, I express my deepest sense of gratitude to my beloved parents for their immense sacrifice, blessings and encouragement.
The Author
Md. Shafikul Alam
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Abstract
This study was undertaken to know the benthic community of Himchori Beach Point in relations with any differences between a newly deposited muddy beach and adjacent sandy beaches. 15 samples representing muddy and sandy beaches were collected and analyzed following standard methods. A total of 20 macro benthos and 18 micro benthos species were identified. In case of macro benthos, the most dominant species was Mesogastropoda comprising 39.29% in muddy beaches, while Ponderous ark (34.90%) and Pila globosa (35.71%) was dominant species in two sandy beaches. In case of micro benthos, Nephtys (27.27%), Bivalves and Urothoe sp.
(40%) and Unionidae (92.30%) was dominant species in muddy and sandy beaches respectively. Both macro and micro benthos distribution showed differences between the newly deposited muddy beach and the sandy beaches in north and south. 10 species of macro benthos out of 20 were found only in the muddy beach and 2 species only in sandy beaches. 13 species of micro benthos out of 18 species were restricted to the newly deposited muddy beach. Contrary to this only one species `Unionidae' was common in sandy beaches. From the differences observed in this study, it can be concluding that the newly deposited beach which visually seems muddy is different from the existing sandy beaches of north and south part of Himchori Beach Point.
Keywords: Sandy beach, Muddy beach, Macro benthos, Micro benthos
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Table of Contents
Acknowledgement IV
Abstract V
List List of Figure
List of Table VII
Chapter 1 1. Introduction 1
1.1. Objective of the Research 4
Chapter 2 2. Literature Review 5
Chapter 3
3. Materials and Methods 9
3.1. Study Area 9
3.2. Research Plan and Working Schedule 11 3.3. Sample Collection and Preservation 12 3.4. Sample Processing and Sorting 12
3.5. Identification 13
3.6. Statistical Analysis 13
Chapter 4
4. Result 14
4.1. Macro Benthos 14
4.2. Micro Benthos 19
Chapter 5 5. Discussion 23
Chapter 6 6. Conclusion 25
Chapter 7 7. Recommendations 26
References 27
Appendix 37
Photo Gallery 41
VII
List of Figures
Figure 1. Map of the study area. 9
Figure 2. Map of the study area showing the sampling stations. 10 Figure 3. Photographs of some benthic species of Himchori Beach Point. 16 Figure 4. Photographs of some benthic species of Himchori Beach Point. 17 Figure 5. Abundance and distribution pattern of macro benthos in Himchori Beach
Point.
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Figure 6. Abundance and distribution pattern of micro benthos in Himchori Beach Point.
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List of Tables
Table 1. Station name with their GPS coordinate 11
Table 2. Working Schedule for conducting the research 11
Table 3. List of macro benthos found from Himchori Beach Point. 14 Table 4. Percentage of composition of macro benthos recorded from Himchori
Beach Point.
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Table 5. List of micro benthos found from Himchori Beach Point. 19 Table 6. Percentage of composition of micro benthos recorded from Himchori
Beach Point.
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8
