Robustness of cheetah asymptotic growth rate and implications to population models∗

نویسندگان

  • Joan Lubben
  • Amy Keighley
  • A. J. Tyre
  • B. Tenhumberg
  • R. Rebarber
  • S. Townley
  • D. Boeckner
  • J. Boyle
  • A. Deines
  • J. Kogut
  • E. Peterson
  • R. Ryan
چکیده

The endangered cheetah (Acinonyx jubatus) is in decline due to hunting, poaching, loss of habitat, lack of genetic diversity and death of cubs due to natural predators such as lions and hyenas. Previous cheetah population models contend that increasing the survivorship of adult cheetahs is the best conservation method to ensure long term viability of this endangered species. The age-structured matrix model of the Serengeti Plain cheetahs by Crooks, et al.[5] suggests the asymptotic population growth rate is most sensitive to adult survivorship. Using linear algebra and robustness techniques, we analyze this previously published model and the robustness of its conclusion. Our results reveal a 5% increase in the adult survivorship is necessary in order to achieve a positive growth. Since the mortality of Serengeti cheetahs occur predominately during the first six months of life, we also explore how large an increase in this survivorship is necessary in order to achieve a positive growth rate. Our results show only an 7.7% increase in cub survivorship is necessary in order to achieve positive growth rate; a figure certainly within reach of concerted conservation efforts. In this paper we present a new population model for the Serengeti cheetahs. Our model examines the effect of capturing pregnant cheetahs, then releasing them back into the wild with their cubs six months after birth. This strategy dramatically increases the survivorship of the cubs in the initial six months of their lives. Using this model in combination with the current conservation strategy of increasing the adult survivorship yields a positive robust population growth rate.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Management Recommendations Based on Matrix Projection Models: The Importance of Considering Biological Limits

Matrix population models are a common tool for evaluating different management strategies. In general, under deterministic analyses, management strategies are recommended that improve those matrix transitions that are most sensitive or elastic with respect to the asymptotic population growth rate, k. These recommendations usually ignore the biological limit for these transitions. In this paper ...

متن کامل

تأثیر رشد بهینه جمعیت بر رشد فناوری، تحلیل بهینه بین کشوری

Abstract Today, population growth is one of the most important issues facing the countries because it affects the patterns of sustainable economic growth. Population growth is a key element of semi-endogenous economic growth models. Semi-endogenous growth states that economic growth is correlated with the growth rate of effort in research and development. The common features of these models ...

متن کامل

Comparison of Growth of Male and Female Kids of Nondescript Goats in a Semi Arid Region of Nigeria

This study compared the use of five different models to describe the growth from birth to 20 weeks of age of kids from both genders of nondescript goats. Fifty nine (59) nondescript kids were weighed weekly at the university of Maiduguri livestock teaching and research farm, Nigeria and the live weights were modeled. Biologically relevant variables were estimated for each kid from the Logistic,...

متن کامل

Urban Sprawl Pattern and Its Implications for Urban Management (Case Study: Zaria Urban Area, Nigeria)

Urban sprawl, or the unplanned and uncontrolled spreading out of built-up areas in Zaria urban area causes problems of congestion, poor urban basic infrastructure delivery and poor urban planning. This paper analyzed the pattern and implications of urban sprawl using GIS and Remote sensing as an improved approach to analyze and explain sprawling beyond the traditional spatial or cartographic ma...

متن کامل

A Discussion on the Effects of Currency Crises on the Real Sector of Iran’s Economy: The Reaction of Productivity, Employment and Economic Growth

Crises stemming from the financial sector of economy and their possible effects on the structures of the real sector of economy including total factor productivity (TFP), labor productivity, employment and economic growth are the principal problem statement of the present study. To analyze of this problem two non-linear models have been specified. Both of them employ Iran’s macro data as well a...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006