biological aspects and the development of larvae ... - ePrints@USM

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Percentage (%) 100 90 80 70 60 50 40 30 20 10 0 100 90 80 70 60 50 40 30 20 10 0 100 90 80 70 60 50 40 30 20 10 0 Sand content upper middle Lower Mud content Mud content Clay content July August September December 2006 Month Figure 2.5 Sediment size in the sampling location 20
2.4.4 Size and length frequency distribution and population abundance of Pholas orientalis In this study, the Pholas orientalis samples were only found in the sampling area in 4 months namely June, July, August and September. There were 861 individuals found in the sampling site for June 2006; followed by July 2006 with 23 individuals; August 2006 (14 individuals) and September 2006 (3 individuals). After September 2006, no Pholas orientalis sample was found after September 2006 until July 2007. The length frequency distribution of subpopulation within a population of Pholas orientalis are illustrated in Figure 2.5a and Figure 2.5b. Most of the shells in the population ranged from the length group of 9.1 – 10.0cm with only a small number of larger and smaller shells observed (x≤ 3.1-4.0cm x≥ 12.1-13.0cm where x = shell length). The patterns of the length group were shifted to the left (from June to September) where the length of the shell was getting smaller. 21
Page 1 and 2: BIOLOGICAL ASPECTS AND THE DEVELOPM
Page 3 and 4: ACKNOWLEDGEMENTS I wish to express
Page 5 and 6: 2.3.2.2 Water nutrient analysis….
Page 7 and 8: 4.4.2 Morphology of larvae shell…
Page 9 and 10: 5.1 Utilization frequency of phytop
Page 11 and 12: 4.3 The umbo shape Pholas orientali
Page 13 and 14: 3.15 Late D-shaped Pholas orientali
Page 15 and 16: LIST OF ABBREVATIONS mm m Millimete
Page 17 and 18: ASPEK-ASPEK BIOLOGI DAN PERKEMBANGA
Page 19 and 20: BIOLOGICAL ASPECTS AND THE DEVELOPM
Page 21 and 22: CHAPTER ONE: GENERAL INTRODUCTION 1
Page 23 and 24: 1.2 Taxonomy and morphology Pholas
Page 25 and 26: Bernam in Kuala Selangor (Figure 1.
Page 27 and 28: CHAPTER TWO: SIZE AND LENGTH FREQUE
Page 29 and 30: 2.3 Materials and method 2.3.1 The
Page 31 and 32: esults are presented in milligram p
Page 33 and 34: 100°15’ E 6°08’ N 100°22’
Page 35 and 36: Table 2.3 Ecological information on
Page 37 and 38: Table 2.4 Water quality values at t
Page 39: level was observed in October 2006
Page 43 and 44: 400 300 January 2007 200 100 0 400

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