On a Certain Optimal Harvesting Problem with Continuous Age Structure

1987 ◽  
pp. 29-42 ◽  
Author(s):  
Martin Brokate
Keyword(s):  
Age Structure ◽  
Optimal Harvesting

OPTIMAL CONTROL FOR A NONLINEAR n-DIMENSIONAL COMPETING SYSTEM WITH AGE-STRUCTURE

2012 ◽  
Vol 05 (03) ◽  
pp. 1260008 ◽  
Author(s):  
ZHI-XUE LUO ◽  
JIAN-YU YANG ◽  
YA-JUAN LUO
Keyword(s):  
Optimal Control ◽  
Age Structure ◽  
Normal Cone ◽  
Equation System ◽  
Optimal Harvesting ◽  
Order Partial Differential Equation ◽  
Differential Equation System ◽  
Optimal Control Strategy ◽  
First Order

This paper is concerned with optimal harvesting control of a first order partial differential equation system representing a nonlinear n-dimensional competitive population model with age-structure. By the Ekeland's variational principle, the existence and unique characterization of the optimal control strategy are established. The optimality conditions for the control problem are obtained by the concept of the normal cone.

scholarly journals Discrete Time Optimal Harvesting of Fish Populations with Age Structure

2014 ◽  
Vol 1 (2) ◽  
pp. 193-207
Author(s):  
Wandi Dine ◽  
Suzanne Lenhart ◽  
Horst Behncke
Keyword(s):  
Discrete Time ◽  
Age Structure ◽  
Fish Populations ◽  
Optimal Harvesting ◽  
Time Optimal

scholarly journals Discrete Time Optimal Harvesting of Fish Populations with Age Structure

2014 ◽  
Vol 1 (2) ◽  
Author(s):  
Wandi Ding ◽  
Suzanne Lenhart ◽  
Horst Behncke
Keyword(s):  
Discrete Time ◽  
Age Structure ◽  
Fish Populations ◽  
Optimal Harvesting ◽  
Time Optimal

Age structure, survivorship and life expectancy for future in Murree forests

2020 ◽  
Vol 53 (3) ◽  
Author(s):  
Afsheen Khan ◽  
S. Shahid Shaukat ◽  
Moinuddin Ahmed
Keyword(s):  
Life Expectancy ◽  
Age Structure

Age Structure and Some Growth Parameters in a Population of Bombina bombina (L., 1761) from Turkey

2018 ◽  
Vol 25 (3) ◽  
pp. 221 ◽  
Author(s):  
Ufuk Bülbül ◽  
Ali İhsan Eroğlu ◽  
Muammer Kurnaz ◽  
Zeynep Mutanoğlu Kaya ◽  
Halime Koç ◽  
...  
Keyword(s):  
Age Structure ◽  
Growth Parameters ◽  
Bombina Bombina

Life History Traits in a Population of Pelobates syriacus (Boettger, 1889) from Turkey

2020 ◽  
Vol 27 (4) ◽  
pp. 195-200
Author(s):  
Ufuk Bülbül ◽  
Halime Koç ◽  
Yasemin Odabaş ◽  
Ali İhsan Eroğlu ◽  
Muammer Kurnaz ◽  
...  
Keyword(s):  
Life History ◽  
Age Structure ◽  
Life History Traits ◽  
Spadefoot Toad ◽  
Males And Females

Age structure of the eastern spadefoot toad, Pelobates syriacus from the Kızılırmak Delta (Turkey) were assessed using phalangeal skeletochronology. Snout-vent length (SVL) ranged from 42.05 to 86.63 mm in males and 34.03 to 53.27 mm in females. Age of adults ranged from 2 to 8 years in males and 3 to 5 years in females. For both sexes, SVL was significantly correlated with age. Males and females of the toads reached maturity at 2 years of age.

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