Open AccessHARVEST PLANNING UNDER UNCERTAIN EXTINCTION TIME
Author(s) -
CAI DEQIN
Publication year - 1999
Publication title -
natural resource modeling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.28
H-Index - 32
eISSN - 1939-7445
pISSN - 0890-8575
DOI - 10.1111/j.1939-7445.1999.tb00013.x
Subject(s) - endangered species , extinction (optical mineralogy) , harvest time , path (computing) , upper and lower bounds , biology , ecology , habitat , mathematics , computer science , agronomy , paleontology , mathematical analysis , programming language
. Harvesting a targeted commercial species results in impacts on an endangered species which may have no direct market value but may need protection as mandated by environmental laws. A vigorous harvest path might drive the endangered species to extinction. This paper studies harvest planning when the endangered species is subject to an uncertain extinction time. It is shown that the optimal static harvest level under certainty can be used as an upper bound for the entire dynamic harvest time path under uncertainty. The paper also develops an explicit upper bound for the entire harvest path under uncertain extinction time of the endangered species. It is demonstrated that an increase in the hazard rate of the endangered species will shift down the upper bound for the entire harvest path, whereas an increase in the growth rate of the commercial species will shift up the upper bound for the entire harvest path.