Catches of Slipper Lobster (Scyllarides squammosus) in three categories from the vicinity of Laysan Bank, Hawaiian Islands on 34 consecutive days in 1986.
Format
A data frame with 34 observations on the following 6 variables.
- day
Day of the catch
- legal
Number of legal lobsters caught.
- sublegal
Number of sub-legal lobsters caught.
- berried
Number of egg-bearing lobsters caught.
- total
Total number of lobsters caught.
- effort
Total daily effort expended.
Source
From Table 1 of Clarke, R.P., and S.S. Yoshimoto. 1990. Application of the Leslie model to commercial catch and effort of the slipper lobster, Scyllarides squammosus, fishery in the northwestern hawaiian islands. Marine Fisheries Review 52(2):1-7. CSV file
Details
Catch (numbers) of lobster in three categories - legal (tail weight greater than 85g), sublegal (tail weight less than 85g), and berried (egg-bearing females). Sublegal and berried lobsters were returned to the water.
The vessel fished between 11 June and 14 July 1986 in the vicinity of Laysan Island and its associated bank. The daily operations of the vessel involved deploying and hauling 1,125 Fathom Plus lobster traps set in strings spaced at 30 m intervals.They were fished in 7 strings of about 160 traps each and baited with Pacific Mackerel, Scomber japonicus. Strings were soaked overnight and retrieved the following day; therefore, the standard unit of effort is the trap-haul.
Examples
data(LobsterHI)
str(LobsterHI)
#> 'data.frame': 34 obs. of 6 variables:
#> $ day : int 1 2 3 4 5 6 7 8 9 10 ...
#> $ legal : int 2133 1675 2979 3788 2883 2430 4092 3267 3440 2790 ...
#> $ sublegal: int 1000 450 1785 1850 1750 1470 2400 1800 1000 820 ...
#> $ berried : int 1000 600 1050 1580 1150 980 1600 1200 1500 450 ...
#> $ total : int 4133 2725 5811 7218 5783 4880 8092 6267 5940 4060 ...
#> $ effort : int 1125 1125 1125 1125 1125 1125 1125 1125 1125 1125 ...
head(LobsterHI)
#> day legal sublegal berried total effort
#> 1 1 2133 1000 1000 4133 1125
#> 2 2 1675 450 600 2725 1125
#> 3 3 2979 1785 1050 5811 1125
#> 4 4 3788 1850 1580 7218 1125
#> 5 5 2883 1750 1150 5783 1125
#> 6 6 2430 1470 980 4880 1125