Pii: S0025-326x(00)00200-9
نویسنده
چکیده
ALASDAIR J. EDWARDS *, SUSAN CLARK , HUSSEIN ZAHIRà, ARJAN RAJASURIYA§, ABDULLA NASEERà and JASON RUBENS Department of Marine Sciences and Coastal Management, University of Newcastle, Newcastle Upon Tyne NE1 7RU, UK àMarine Research Centre, Ministry of Fisheries, Agriculture and Marine Resources, Male', Maldives §Coral Reef Research Programme, National Aquatic Resources Research & Development Agency, Crow Island, Mattakkuliya, Colombo 15, Sri Lanka GCRMN Regional Co-ordinator, South Asia, 48 Vajira Road, Colombo 5, Sri Lanka
منابع مشابه
Pii: S0025-326x(98)00204-5
M. D. DICKMAN *, K. M. C. LEUNGà and L. C. L. KOO§ Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China àHong Kong Invitrofertilization Clinic, Hong Kong Sanitorium Hospital, 2 Village Road, Happy Valley, Hong Kong, People's Republic of China §Department of Community Medicine, The University of Hong Kong, Pokfulam Road, Hong K...
متن کاملPii: S0025-326x(00)00039-4
Ria de Vigo is a funnel-shaped, fault-bounded coastal embayment in Galicia, NW Spain. There are a number of important centres of population and industrial activity along its margins, which serve as sources of pollution. Sixty-six subtidal sediment samples have been collected in the Ria. The samples have been subjected to a total digestion technique and analysed for major and trace elements (Al,...
متن کاملPii: S0025-5564(00)00024-9
We formulate a non-linear system of dierential equations that models the dynamics of transmission of dengue fever. We consider vertical and mechanical transmission in the vector population, and study the eects that they have on the dynamics of the disease. A qualitative analysis as well as some numerical examples are given for the model. Ó 2000 Elsevier Science Inc. All rights reserved.
متن کاملPii: S0025-5564(00)00033-x
In this paper, we establish a mathematical model of two species with stage structure and the relation of predator±prey, to obtain the necessary and sucient condition for the permanence of two species and the extinction of one species or two species. We also obtain the optimal harvesting policy and the threshold of the harvesting for sustainable development. Ó 2000 Elsevier Science Inc. All rig...
متن کاملPii: S0025-5564(00)00005-5
We consider a single-species model which is composed of several patches connected by linear migration rates and having logistic growth with a threshold. We show the existence of an aggregating mechanism that allows the survival of a species which is in danger of extinction due to its low population density. Numerical experiments illustrate these results. Ó 2000 Elsevier Science Inc. All rights ...
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