The Natural Regulation of Animal Numbers |
From inside the book
Results 1-3 of 17
Page 95
David Lambert Lack. calculated and set out for the Lapwing in Figs . 15 , 16 , and 17 respectively.1 Number of survivors Number of survivors 1000 Lapwing ( Vanellus vanellus ) 800 600 400 200 0 1 1 2 3 4 5 6 7 8 9 10 Age in years 1000 ...
David Lambert Lack. calculated and set out for the Lapwing in Figs . 15 , 16 , and 17 respectively.1 Number of survivors Number of survivors 1000 Lapwing ( Vanellus vanellus ) 800 600 400 200 0 1 1 2 3 4 5 6 7 8 9 10 Age in years 1000 ...
Page 96
... Lapwing ( Vanellus vanellus ) 90 80 70 60 50 40 30 20 10 Percentage of those alive at start of decade dying during this decade Percentage of those alive at start of year dying during year 1 0 1 2 3 4 5 6 7 8 9 Age in years 100 Modern ...
... Lapwing ( Vanellus vanellus ) 90 80 70 60 50 40 30 20 10 Percentage of those alive at start of decade dying during this decade Percentage of those alive at start of year dying during year 1 0 1 2 3 4 5 6 7 8 9 Age in years 100 Modern ...
Page 97
... Lapwing , up to an age at which extremely few individuals are left alive , whereas in civilized man it starts high and falls steadily with age . 4 Lapwing ( Vanellus vanellus ) 1 40r 30 20 Expectation of further life in : - Years ...
... Lapwing , up to an age at which extremely few individuals are left alive , whereas in civilized man it starts high and falls steadily with age . 4 Lapwing ( Vanellus vanellus ) 1 40r 30 20 Expectation of further life in : - Years ...
Contents
Gen | 1 |
THE COMPARATIVE STABILITY OF POPULATIONS | 7 |
THE SIGNIFICANCE OF CLUTCHSIZE IN BIRDS | 30 |
23 other sections not shown
Other editions - View all
Common terms and phrases
10-year cycle abundant adults Alpine Swift animals arctic average clutch birds Blue Tit Bobwhite breeding season broods California Quail cause cent Chapter chicks clutch-size Coal Tit colonies Common Swift Crossbill cyclic death-rate deer density-dependent disease ducks emigration Europe factors feeding females figures Finland fish fluctuations food shortage food supply further gallinaceous birds habitat hatched Hence higher increase individuals insects irruptions juveniles Kluijver Lack Lapwing large numbers larvae lemmings limit losses males mammals MICHIGAN migration mortality natural selection nest nestling nidifugous normally North America number of eggs number of young numbers parasites passerine passerine birds peak pine population density predators prey proportion raise Red Grouse region reproductive rate ringed Robin rodents Ruffed Grouse shown similar Song Thrush song-birds Sparrow Sparrowhawk species Spotted Woodpecker Starling starvation studied summer survival Swift Table territories Tinbergen tion usually variations various Varying Hare voles Warbler Waxwing winter woods Yellow-eyed Penguin