Spawners per recruit

Calculates the spawners per recruit (spr) at each level of fishing mortality (F) in the fbar slot, or the spawners per recruit when F=0 (spr0).

# S4 method for FLBRP
spr(object)

# S4 method for FLBRP,missing,missing
spr0(ssb)

Arguments

object

An object of class FLBRP

Value

An object of class FLQuant.

Examples

data(ple4brp)

spr(ple4brp)
#> An object of class "FLQuant"
#> , , unit = unique, season = all, area = unique
#> 
#>    year
#> age 1         2         3         4         5         6         7        
#>   1 3.4180492 2.8109780 2.3192358 1.9198591 1.5946551 1.3291671 1.1118743
#>    year
#> age 8         9         10        11        12        13        14       
#>   1 0.9335715 0.7868848 0.6658928 0.5658301 0.4828525 0.4138525 0.3563131
#>    year
#> age 15        16        17        18        19        20        21       
#>   1 0.3081908 0.2678240 0.2338584 0.2051881 0.1809085 0.1602781 0.1426878
#>    year
#> age 22        23        24        25        26        27        28       
#>   1 0.1276366 0.1147113 0.1035705 0.0939317 0.0855604 0.0782620 0.0718741
#>    year
#> age 29        30        31        32        33        34        35       
#>   1 0.0662612 0.0613100 0.0569255 0.0530277 0.0495494 0.0464337 0.0436326
#>    year
#> age 36        37        38        39        40        41        42       
#>   1 0.0411050 0.0388164 0.0367370 0.0348414 0.0331078 0.0315176 0.0300545
#>    year
#> age 43        44        45        46        47        48        49       
#>   1 0.0287046 0.0274557 0.0262973 0.0252202 0.0242163 0.0232785 0.0224007
#>    year
#> age 50        51        52        53        54        55        56       
#>   1 0.0215772 0.0208033 0.0200746 0.0193874 0.0187380 0.0181236 0.0175414
#>    year
#> age 57        58        59        60        61        62        63       
#>   1 0.0169888 0.0164637 0.0159641 0.0154881 0.0150341 0.0146006 0.0141862
#>    year
#> age 64        65        66        67        68        69        70       
#>   1 0.0137896 0.0134098 0.0130457 0.0126964 0.0123608 0.0120384 0.0117282
#>    year
#> age 71        72        73        74        75        76        77       
#>   1 0.0114296 0.0111419 0.0108647 0.0105972 0.0103391 0.0100898 0.0098489
#>    year
#> age 78        79        80        81        82        83        84       
#>   1 0.0096159 0.0093906 0.0091725 0.0089613 0.0087566 0.0085583 0.0083659
#>    year
#> age 85        86        87        88        89        90        91       
#>   1 0.0081793 0.0079982 0.0078223 0.0076515 0.0074855 0.0073242 0.0071673
#>    year
#> age 92        93        94        95        96        97        98       
#>   1 0.0070148 0.0068663 0.0067219 0.0065812 0.0064442 0.0063108 0.0061808
#>    year
#> age 99        100       101      
#>   1 0.0060541 0.0059305 0.0058101
#> 
#> units:  NA 
spr0(ple4brp)
#> An object of class "FLQuant"
#> , , unit = unique, season = all, area = unique
#> 
#>    year
#> age 1    
#>   1 3.418
#> 
#> units:  NA 
data(ple4brp)

spr0(ple4brp)
#> An object of class "FLQuant"
#> , , unit = unique, season = all, area = unique
#> 
#>    year
#> age 1    
#>   1 3.418
#> 
#> units:  NA