NaturalMortality: Estimation of natural mortality.

In sandroklippel/fishassess: Functions on fishery biology, stock assessment and management.

Description

Estimation of natural mortality by several life-history relationships.

Usage

M.pauly(Linf, K, Temp)
M.pauly.w(Winf, K, Temp)
M.ralston(K)
M.gunderson(GSI)
M.jensen1(Tmat)
M.jensen2(K)
M.jensen3(K)
M.rikhter(Tmat)

Arguments

Linf	asymptotic length.
Winf	asymptotic weight.
K	growth rate.
Temp	mean water temperature experienced by the stock.
GSI	gonad-somatic index.
Tmat	age at first maturity.

Value

Natural mortality estimate.

Author(s)

Sandro Klippel

References

Gunderson, D. R., Dygert, P. H., 1988. Reproductive effort as a predictor of natural mortality rate. J. Cons. int. Explor. Mer 44, 200-209.

Jensen, A., 1996. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Canadian Journal of Fisheries and Aquatic Sciences 53, 820-822.

Pauly, D., 1980. On the interrelationship between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks. Journal du Conceil International pour l'Exploration de la Mer 39 (2), 175-192.

Ralston, S., 1987. Tropical snappers and groupers. Biology and fisheries management. Westview Press, London, Chap. Mortality rates of snappers and groupers, pp. 375-404.

Rikhter, V., Efanov, V., 1976. On one of the approaches to estimation of natural mortality of fish populations. ICNAF Res. Doc. 76 (VI), 12.

sandroklippel/fishassess documentation built on June 5, 2019, 10:54 a.m.