Author:

H.B. Rasmussen,a,b,c J.B.A. Okello,d G. Wittemyer,c,e H.R. Siegismund,b P. Arctander,b

Abstract:

Information on age- and tactic-related paternity success is essential for understanding the lifetime reproductive strategy of males
and constitutes an important component of the fitness trade-offs that shape the life-history traits of a species. The degree of
reproductive skew impacts the genetic structure of a population and should be considered when developing conservation
strategies for threatened species. The behavior and genetic structure of species with large reproductive skew may be disproportionately

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Author:

Henrik Barner Rasmussen1,2*, George Wittemyer3,2 and Iain Douglas-Hamilton2

Abstract:

High precision condensation dental silicon, ZetalaborTM,
was used to create moulds of the lower jaw molars from 22
immobilized African elephants (Loxodonta africana Blumenback)
during radio collaring operations. These moulds
were used to determine the elephant’s age using Laws and
Jachmann’s molar aging criteria. The technique proved
easy and fast and produced useful imprints in 90% of the
cases. We found our age estimates, based on physical
appearance, made prior to immobilizations were relatively

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Author:

Henrik Barner Rasmussen, Onesmas Kahindi, Fritz Vollrath and Iain
Douglas-Hamilton

Abstract:

In this paper, we present a new method for estimating
elephant densities by counting elephant wells and dung
boli within dry seasonal flooding rivers. A combination of
aerial and ground counts of elephant wells and dung boli
in the Ewaso Ngiro River were related to elephant numbers,
obtained from an on-going monitoring program of
individually identified elephants in Samburu and Buffalo
Spring National Reserves, Kenya. The total number of
elephant observations was highly correlated with both

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Author:

Henrik B. Rasmussen, Andre Ganswindt, Iain Douglas-Hamilton, Fritz Vollrath

Abstract:

Hormones play a crucial role in mediating genetic and environmental effects into morphological and
behavioral phenotypes. In systems with alternative reproductive tactics (ART) shifts between tactics are
hypothesized to be under proximate hormonal control. Most studies of the underlying endocrine changes
behind ART have focused on !sh and amphibians rather than mammals and few have investigated the
potential interaction between different endocrine axes in regulating shifts between conditional dependent

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Author:

Henrik Barner Rasmussen
EvAlife Research Group

Abstract:

In the spring of 1999, the EvAlife research group was established at the University of Aarhus, Denmark. Headed by Dr. Thiemo Krink and Prof. Brian Mayoh (Computer Science, University of Aarhus), the EvAlife project is an interdisciplinary project between biology and computer science using general mechanisms from behavioural and evolutionary ecology as inspiration to novel computing techniques. The primary goal is the creation of models for decision-making and description of self-organisation and robustness in complex systems.

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Author:

E.A. Raizmana, H. Barner Rasmussen, L.E. King, F.W. Ihwagi,
I. Douglas-Hamilton

Abstract:

The study was conducted to assess the technical feasibility of studying the spatial and
temporal interaction of traditionally herded livestock and wildlife using global positioning
system (GPS) tracking technology in Northern Kenya. Two types of collars were used on
nine cows: radio frequency and global system for mobile communications (GSM) collars
and GPS-satellite (SAT) collars. Full results of cattle tracking were available for eight cows
(3 GSM and 5 SAT) tracked between July 2008 and September 2010. A cumulative total

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