Smolt stocking by production unit — smolt

Create smolt stocking numbers in each production unit (PU) based on starting number of smolts and proportion of smolts to be stocked in each PU.

Usage

smolt_stocking(n_stocked = 545000, stocking_proportions = NULL)

Arguments

n_stocked: Number of hatchery-reared 2-year smolts to be stocked.
stocking_proportions: Proportion of total to be stocked in each PU. The values must sum to 1. Default values are based on smolt stocking locations 2008 - 2017 (USASAC 2018).

Value

A vector with 15 elements within which positions correspond to PUs as ordered in the link{stocking_default} dataset. The default (`NULL`) corresponds to default values used in Nieland et al. (2015, 2020).

References

Nieland JL, Sheehan TF. 2020. Quantifying the Effects of Dams on Atlantic Salmon in the Penobscot River Watershed, with a Focus on Weldon Dam. US Department of Commerce, Northeast Fisheries Science Center Reference Document 19-16, Woods Hole, MA.

Nieland JL, Sheehan TF, Saunders R. 2015. Assessing demographic effects of dams on diadromous fish: a case study for Atlantic salmon in the Penobscot River, Maine. ICES Journal of Marine Science 72:2423–2437.

USASAC (US Atlantic Salmon Assessment Committee). 2018. Annual Report of the US Atlantic Salmon Assessment Committee, Report No. 30 - 2017 Activities, Portland, ME.

Examples

# Run stocking routine for 1 million fish with default stocking
# proportions based on built-in \code{\link{stocking_default}} data set.
smolt_stocking(1e6, stocking_proportions = NULL)
#>  [1]      0      0  48600  18800      0      0      0 185100      0 261600
#> [11]      0      0      0      0 485900