# Bluebles1

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Model was written in NetLogo 5.0RC7
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globals [grass] ;; keep track of how much grass there is ;; smoothbluebles, spinybluebles, longneckbluebles, greenbluebles and snurples are all breeds of turtles. breed [smoothbluebles smoothblueble] breed [spinybluebles spinyblueble] breed [longneckbluebles longneckblueble] breed [greenbluebles greenblueble] breed [snurples snurple] turtles-own [energy] patches-own [countdown] to setup clear-all ask patches [ set pcolor 64 ] ask patches [ set countdown random 10 ;; initialize grass grow clocks randomly set pcolor one-of [64 white] ;; green or white ] set-default-shape smoothbluebles "smooth blueble" create-smoothbluebles initial-number-smoothbluebles ;; create the smooth bluebles, then initialize their variables [ set color 105 ;; blue set size 7 ;; easier to see set energy random 2 setxy random-xcor random-ycor ] set-default-shape spinybluebles "spiny blueble" create-spinybluebles initial-number-spinybluebles ;; create the spiny bluebles, then initialize their variables [ set color 105 ;; blue set size 7 ;; easier to see set energy random 2 setxy random-xcor random-ycor ] set-default-shape longneckbluebles "longneck blueble" create-longneckbluebles initial-number-longneckbluebles ;; create the longneck bluebles, then initialize their variables [ set color 105 ;; blue set size 7 ;; easier to see set energy random 2 setxy random-xcor random-ycor ] set-default-shape greenbluebles "spiny blueble" create-greenbluebles initial-number-greenbluebles ;; create the green bluebles, then initialize their variables [ set color 64 ;; green set size 7 ;; easier to see set energy random 2 setxy random-xcor random-ycor ] set-default-shape snurples "snurple" create-snurples initial-number-snurples ;; create the snurples, then initialize their variables [ set color 115 ;; purple set size 7 ;; easier to see set energy random 50 setxy random-xcor random-ycor ] set grass count patches with [pcolor = 64] reset-ticks end to go if not any? turtles [ stop ] ask smoothbluebles [ move set energy energy - 1 ;; deduct energy for smoothbluebles eat-grass death reproduce-smoothbluebles ] ask spinybluebles [ move set energy energy - 1 ;; deduct energy for spinybluebles eat-grass death reproduce-spinybluebles ] ask longneckbluebles [ move set energy energy - 1 ;; deduct energy for longneckbluebles eat-grass death reproduce-longneckbluebles ] ask greenbluebles [ move set energy energy - 1 ;; deduct energy for greenbluebles eat-grass death reproduce-greenbluebles ] ask snurples [ move set energy energy - 1 ;; snurples lose energy as they move catch-smoothbluebles death reproduce-snurples ] ask patches [ grow-grass ] set grass count patches with [pcolor = 64] ;; green tick end to move ;; turtle procedure rt random 50 lt random 50 fd 1 end to eat-grass ;; bluebles procedure ;; bluebles eat grass, turn the patch white if pcolor = 64 [ ;; green set pcolor white set energy energy + 2 ;; bluebles gain energy by eating ] end to reproduce-smoothbluebles ;; smoothbluebles procedure if random-float 100 < bluebles-reproduce [ ;; throw "dice" to see if you will reproduce set energy (energy / 2) ;; divide energy between parent and offspring hatch 1 [ rt random-float 360 fd 1 ] ;; hatch an offspring and move it forward 1 step ] end to reproduce-spinybluebles ;; spinybluebles procedure if random-float 100 < bluebles-reproduce [ ;; throw "dice" to see if you will reproduce set energy (energy / 2) ;; divide energy between parent and offspring hatch 1 [ rt random-float 360 fd 1 ] ;; hatch an offspring and move it forward 1 step ] end to reproduce-longneckbluebles ;; longneckbluebles procedure if random-float 100 < bluebles-reproduce [ ;; throw "dice" to see if you will reproduce set energy (energy / 2) ;; divide energy between parent and offspring hatch 1 [ rt random-float 360 fd 1 ] ;; hatch an offspring and move it forward 1 step ] end to reproduce-greenbluebles ;; greenbluebles procedure if random-float 100 < bluebles-reproduce [ ;; throw "dice" to see if you will reproduce set energy (energy / 2) ;; divide energy between parent and offspring hatch 1 [ rt random-float 360 fd 1 ] ;; hatch an offspring and move it forward 1 step ] end to reproduce-snurples ;; snurple procedure if random-float 100 < snurples-reproduce [ ;; throw "dice" to see if you will reproduce set energy (energy / 2) ;; divide energy between parent and offspring hatch 1 [ rt random-float 360 fd 1 ] ;; hatch an offspring and move it forward 1 step ] end to catch-smoothbluebles ;; snurple procedure let prey one-of smoothbluebles-here ;; grab a random smoothblueble if prey != nobody ;; did we get one? if so, [ ask prey [ die ] ;; kill it set energy energy + 100 ] ;; get energy from eating end to death ;; turtle procedure ;; when energy dips below zero, die if energy < 0 [ die ] end to grow-grass ;; patch procedure ;; countdown on white patches: if reach 0, grow some grass if pcolor = white [ ifelse countdown <= 0 [ set pcolor 64 set countdown 10 ] [ set countdown countdown - 1 ] ] end

There is only one version of this model, created about 8 years ago by Kay Ramey.

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