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                                                             4



                                  8   ! #	$9o#L	"	$	 V  !"   : ;


                                (Technique of Insect Life Table Study)




                   4.1  #	$9o#L	"	$	 V  !"   : ;  (Insect life table study)




                                                                 +

                          
  $+
4      %            &6  
  # '
H+ !    0
    "( " **"    K

                                                                                        M

                       "    
   * 2   #        %           

    H+      %     !   	
4  &6





                                                                                                   /
                                                       6/

                        %    (life  tables)  ("*          
    "      % 
          L   %   '  *



                                       	7
                                           /
                                                                                          ,
                    
(* 
 **"    K ' ' %      5  %             &    0( ! #
                                                                                      )




                            M
                                                                                          6/

                    " ". L0,!0'L  (fertility tables     the net reproductive rate)  ("*          
    
5

                                                                                       /
                                                                                       1
                                                                     0

                                                         /



                   
   . . L0,   *     '        '   
9    " "H	(5 * 

  '       7" - "
                                    1
                   !- .     9 #	  
    6   6  '(

                        4.1.1  8 P Q P #	$$ OV  !" (The survivorship curve)




                                                             1
                                                                                                 /

                                     /
                                H        * 
5          ("
   (   5     .$  "'	7   (  %        7"
                                                                                            7

                                                                                                  6/

                       * 
5  ' /     .$   "*1     100 V   '1 
    (   
  .
     5 
 0      5    "K
                                                                    /
                                                                                                     0


                                                                                         	7


                   * 
5      	      (
 (    
  "    	   Y  	"  '!0(   (      5 * 
  '  	   Y  	"'
                    	   "  (    *     5  6    
  &1      
   * 2   #                .*

                                                                                        	7





                                                                                             /
                                     	7


                                                               6
                                           	7
                    8.   .$  " '    (   &   survivorship     !	(!      ! /  %          '  (%

                        (      +/  (l ) &6
                                    x

                                                              Z
                                                         l =   x
                                                         x
                                                              Z 0


                                  6/     Z    &6  *1        .$  "'  (%       %        x
                                                                    /
                                          x
                                         Z    &6  *1        .$  "'   (        /
                                                                   	7

                                          0

                                               * #    '  #     =      1 ' 
  !   
  V !           l
                                         /
                                                                         1


                                                                 l
                                                                                                     x
                                                                  0




                                                                              /


                   
# x   ("   l      
  	7       x      
     * 5(
  V'  "
    !   &  
    (%

                                 x
                   (survivorship curve) (	  ) ' / 4.1  +/  ("'	/ 5  !   &  
    (%       ")  3  ##&6
                                1. Type Ι      	
4  ' /   
9      ' /  &        ")     !	 &
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