Rasbora Tawarensis) an ENDEMIC SPECIES in LAKE LAUT TAWAR
Total Page:16
File Type:pdf, Size:1020Kb
DIVERSITY OF FRESHWATER FISHES IN ACEH PROVINCE WITH EMPHASIS ON SEVERAL BIOLOGICAL ASPECTS OF THE DEPIK (Rasbora tawarensis) AN ENDEMIC SPECIES IN LAKE LAUT TAWAR MUCHLISIN Z.A. UNIVERSITI SAINS MALAYSIA DECEMBER 2010 DIVERSITY OF FRESHWATER FISHES IN ACEH PROVINCE WITH EMPHASIS ON SEVERAL BIOLOGICAL ASPECTS OF THE DEPIK (Rasbora tawarensis) AN ENDEMIC SPECIES IN LAKE LAUT TAWAR by MUCHLISIN Z.A. Thesis submitted in fulfillment of the requirements for the degree of Doctor of Philosophy UNIVERSITI SAINS MALAYSIA DECEMBER 2010 ACKNOWLEDGEMENTS Bissmillahirahmannirahim, I would like to express my sincere thanks to my supervisor, Associate Professor Dr. Siti Azizah M. Nor for her helpful advice and guidance throughout this project of the research work. I am grateful to the Vice- Chancellor, University Sains Malaysia, Penang, and the Dean, School of Biological Sciences for their permission to use the University and School facilities for my research. My thanks go to the Director General of Higher Education, National Educational Department of Republic of Indonesia for providing DIKTI-LN Scholarship to support my study in University Sains Malaysia. Thanks to the Rector of Syiah Kuala University, Banda Aceh, Indonesia for giving me permission and kindly granting me study leave to pursue my studies. Parts of the research project were also supported by PGRS-RU USM Grant, small grant from Yayasan Ekosistim Lestari (YEL) – Paneco and small grant for species conservation from The Mohammad bin Zayed Species Conservation Fund, for which I express sincere thanks. Thanks are also due to Ms. Maniah, Mr. Safei, Mr. Nur Fadli, Mr. Arie Muhardi, Mr. Hasfiandi, Dr. Edi Rudi, fishermen of Lake Laut Tawar and all members of the Aquaculture Research Group, Universiti Sains Malaysia especially for members of 308 laboratory for their assistance during phases of the study. Lastly, I express my sincere gratefulness and thanks to my wife, Nelly Feryanti and my sons, Muhammad Fayyaz Almizan and Muhammad Farel Alazizia for their trust, support, understanding and encouragement. I am also indebted to my ii parents, Zainal Abidin Djafaris and Nursiah for their constant inspirations and prayer to the Almighty for my success. iii TABLE OF CONTENTS Page ACKNOWLEDGMENT ......................................................................................... ii TABLE OF CONTENTS ……………………………………………………........ iv LIST OF TABLES ………………………………………………………………... viii LIST OF FIGURES……………………………………………………………...... xi LIST OF PLATES ………………………………………………………………... xiii ABSTRAK ………………………………………………………………………… xv ABSTRACT ……………………………………………………………………..... xix CHAPTER 1 - GENERAL INTRODUCTION 1.1 General Description of Aceh Province ………………………………………… 1 1.1.1 Geography and administration …………………………………………… 1 1.1.2 Socio-economic and cultural …………………………………………….. 3 1.2 General Description of Aceh Tengah District and Lake Laut Tawar ………..... 4 1.3 Current Fisheries Activities in The Lake Laut Tawar ......................................... 6 1.3.1 Capture fisheries ......................................................................................... 6 1.3.2 Aquaculture ................................................................................................ 7 1.3.3 Other utilization of the lake …………………………………………........ 8 1.4 Problem Statement................................................................................................ 8 1.5 Objectives of the Study ....................................................................................... 10 1.6 Outline of the Study ………………………………………………………........ 11 CHAPTER 2 - LITERATURE REVIEW 2.1 Fish Diversity and Conservation ……………………………………………..... 13 2.2 Quantitative Morphological Variation of Fishes- Morphometrics and Meristics. 17 2.3 Role of Genetic Study in Fisheries, Aquaculture and Conservation………….... 18 2.4 DNA Barcoding……………………………………………………………....... 20 2.5 Reproductive Biology of Fishes ………………………………………………... 22 2.5.1 Reproductive strategy ………………………………………………......... 22 2.5.2 Reproductive system ……………………………………………………... 23 2.5.3 Fecundity …………………………………………………………………. 25 2.5.4 Gonad developmental and spawning frequency ……………………......... 29 2.5.5 Some factors influencing the reproductive performance of fish ……........ 31 2.6 General Introduction to Depik, Rasbora tawarensis…………………………… 34 iv CHAPTER 3 - DIVERSITY AND DISTRIBUTION OF FRESHWATER FISHES IN ACEH PROVINCE 3.1 Introduction .......................................................................................................... 37 3.2 Objectives ............................................................................................................ 39 3.3 Materials and Methods ........................................................................................ 39 3.3.1 Study site and period …………………………………………………….. 39 3.3.2 Sampling, preservation and identification of fishes ……………………… 42 3.3.3 Analysis of biological indices …………………………………………… 42 3.3.4 Multivariate analyses …………………………………………………….. 44 3.4 Results ................................................................................................................. 44 3.4.1 Species composition and distribution ……………………………………. 44 3.4.2 Diversity index (Shannon index) ………………………………………… 52 3.4.3 Evenness and similarity indices ………………………………………..... 52 3.5 Discussion ……………………………………………………………………… 55 3.5.1 Species composition and distribution ………………………………......... 55 3.5.2 Biological indices ………………………………………………………… 59 3.5.2.1 Diversity index …………………………………………………… 59 3.5.2.2 Evenness and similarity indices ………………………………...... 62 3.6 Conclusions …………………………………………………………………….. 63 CHAPTER 4 - EVALUATION OF CONSERVATION STATUS AND ECONOMIC VALUES OF FRESHWATER FISHES IN ACEH PROVINCE, INDONESIA 4.1 Introduction …………………………………………………………………….. 64 4.2 Objectives ……………………………………………………………………… 66 4.3 Materials and Methods …………………………………………………………. 67 4.3.1 Sampling, preservation and identification of fishes ……………………… 67 4.3.2 Evaluation of conservation status ………………………………………... 67 4.3.3 Evaluation of economic status …………………………………………… 68 4.3.4 Determination of priority species for further studies ………………….. 68 4.4 Results ………………………………………………………………………….. 69 4.4.1 Conservation status …………………………………………………......... 69 4.4.2 Economic status ………………………………………………………….. 70 4.4.3 Determination of priority species for further study …………………........ 70 4.5 Discussion ……………………………………………………………………… 79 4.5.1 Conservation status …………………………………………………......... 79 4.5.1.1 Threatened species ……………………………………………...... 79 4.5.1.2 Introduced species ………………………………………………... 84 4.5.2 Economic status ………………………………………………………….. 93 4.5.3 Priority species as a model for conservation and management in Lake Laut Tawar………………………………………………………………... 95 4.6 Conclusions ………………………………………………………………......... 98 v CHAPTER 5 - BARCODING OF THE FISHES IN LAKE LAUT TAWAR WITH SPECIAL EMPHASIS ON THE MORPHOMETRIC AND MOLECULAR TAXONOMY AMONG THE Rasbora GROUP 5.1 Introduction …………………………………………………………………...... 99 5.2 Objectives …………………………………………………………………........ 102 5.3 Materials and Methods ……………………………………………………........ 103 5.3.1 Morphometrics and meristic analyses among three presumed Rasbora taxa ……………………………………………………………………….. 103 5.3.2 Molecular analysis – Barcoding ………………………………………….. 108 5.4 Results ………………………………………………………………………… 111 5.4.1 Morphometrics …………………………………………………………… 111 5.4.2 Molecular analysis……………………………………………………….. 123 5.5 Discussion ……………………………………………………………………… 138 5.5.1 Morphometric analysis of Rasbora group.…………………………........ 138 5.5.2 Molecular analysis of Rasbora group ……………………………………. 139 5.5.3 Morphometrics versus genetic approaches in Rasbora …………………. 141 5.5.4 Barcoding of freshwater fishes of Lake Laut Tawar …………………….. 143 5.6 Conclusions …………………………………………………………………….. 146 CHAPTER 6 - LENGTH-WEIGHT RELATIONSHIPS AND CONDITION FACTORS OF DEPIK Rasbora tawarensis AND KAWAN Poropuntius tawarensis IN LAKE LAUT TAWAR 6.1 Introduction ………………………………………………………………….. ... 147 6.2 Objectives ……………………………………………………………………… 148 6.3 Materials and Methods ………………………………………………………… 149 6.3.1 Sampling sites ………………………………………………………......... 149 6.3.2 Length-weight relationships ……………………………………………… 149 6.3.3 Condition factors ……………………………………………………........ 150 6.3.4 Statistical analysis ……………………………………………………….. 151 6.4 Results ………………………………………………………………………..... 151 6.5 Discussion ……………………………………………………………………… 158 6.5.1 Length-weight relationships ……………………………………………… 158 6.5.2 Condition factors ……………………………………………………........ 160 6.6 Conclusions…………………………………………………………………….. 161 CHAPTER 7 - DISTRIBUTION PATTERNS AND PRODUCTION TREND OF THE DEPIK (Rasbora tawarensis) IN LAKE LAUT TAWAR 7.1 Introduction …………………………………………………………………...... 163 7.2 Objectives ……………………………………………………………………… 164 7.3 Materials and Methods …………………………………………………………. 165 7.3.1 Evaluation of seasonal and spatial distribution …………………………... 165 7.3.2 Evaluation of catch-per-unit effort (CPUE) ……………………………… 166 7.3.3 Production trend …………………………………………………………. 166 7.3.4 Statistical analysis ………………………………………………………... 167 7.4 Results ………………………………………………………………………..... 168 7.4.1 Distribution patterns ……………………………………………………… 168 vi 7.4.2 Production trend ………………………………………………………..... 173 7.5 Discussion ……………………………………………………………………… 175 7.5.1 Distribution patterns ……………………………………………………… 175 7.5.2 Estimation of production trend …………………………………………... 179 7.6 Conclusion ……………………………………………………………………... 182 CHAPTER 8 - SOME ASPECTS OF REPRODUCTIVE BIOLOGY OF THE DEPIK Rasbora tawarensis