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October 2011 | <strong>Prague</strong> 35<br />

Creating sustainable<br />

herds sustainably<br />

Because C2S2 institutions have<br />

large barn complexes and spacious<br />

pastures, we became interested in<br />

the value of alternative management<br />

scenarios for space-loving hoofed<br />

species, especially antelopes. This<br />

also seemed timely because ungulates<br />

appear especially vulnerable<br />

to current zoo breeding programs.<br />

First, there has been a loss of nearly<br />

1,000 spaces in AZA zoos for antelopes<br />

since 1999, and this decline<br />

is projected to continue. Secondly,<br />

many of these ungulates live in polygamous<br />

herds or harems in nature<br />

where one male mates with multiple<br />

females. Offspring develop in herds,<br />

an adaptation that not only assists<br />

in survival, but likely confers social,<br />

behavioral and reproductive benefits<br />

to young and the population as<br />

a whole. This is contrary to most zoo<br />

collections that maintain only pairs<br />

or a few individual animals/species.<br />

Thus, maintaining ungulates in more<br />

naturalistic groups may help produce<br />

behaviorally-adaptable offspring that<br />

can thrive in captivity as well as in the<br />

wild after reintroduction. Antelopes,<br />

in particular, are at risk. According to<br />

the IUCN, one-fourth of all antelopes<br />

are threatened with extinction (IUCN<br />

2010). Therefore, it appears timely to<br />

examine how managing animals as<br />

larger groups, rather than as individuals,<br />

influences not only genetic<br />

variation, but also the biological<br />

quality and robustness of individuals.<br />

This project is designed to take a step<br />

beyond traditional pedigree based<br />

analysis to identify and explore other<br />

biological traits, including behavior,<br />

health and reproductive factors<br />

that contribute to adaptability and<br />

resiliency and ultimately population<br />

sustainability.<br />

Our targeted species designated for<br />

study include: the addax (Addax nasomaculatus),<br />

addra gazelle (Nanger<br />

dama), scimitar-horned oryx (Oryx<br />

dammah) and sable antelope (Hippotragus<br />

niger). The species were<br />

chosen because (1) the conservation<br />

priority for them is high, (2)<br />

current ex situ populations are not<br />

self-sustaining and (3) available zoo<br />

spaces for these species are declining.<br />

For instance, only a few hundred<br />

individuals remain of both the<br />

addax and the addra gazelle, making<br />

ongoing conservation action a real<br />

priority. Using stocks produced by<br />

zoos, reintroduction programs for<br />

addax and addra gazelle are in place<br />

or in discussion for Tunisia and other<br />

locales. Similarly, the scimitar-horned<br />

oryx was extirpated in nature in the<br />

1990s. Captive born scimitars have<br />

already been released into Tunisia,<br />

Senegal and Morocco with all these<br />

efforts often led by, or aligned with<br />

the Saharan Conservation Fund<br />

(Iyengar et al 2007). Currently, there<br />

is keen interest in reintroducing sable<br />

back into Southern Africa. But for<br />

these reintroductions to be successful,<br />

animals of sufficient quality and<br />

quantity must be produced. Working<br />

in partnership with the Antelope<br />

TAG and respective PMP/SSPs (for<br />

breeding recommendations) and 10<br />

other AZA zoos (that will be providing<br />

‘control’ data), the goal of C2S2’s<br />

big herds project is to determine the<br />

biological quality, cost benefits and<br />

resources used when managing these<br />

species in large versus small groups.<br />

C2S2 institutional space will be used<br />

to develop and monitor breeding<br />

herds with ‘rotating’ males as well as<br />

bachelor and bachelorette groups for<br />

surplus individuals. We are especially<br />

keen to determine if a herd management<br />

system is better at producing<br />

more animals that also are more<br />

socially and behaviorally competent,<br />

healthier, adaptable and more suitable<br />

for reintroduction.<br />

Crane sustainability<br />

Using concepts and aspects of our<br />

Cheetah Sustainability and Conservation<br />

Program, C2S2 is now collaborating<br />

with the AZA Gruiformes<br />

TAG, program leaders and interested<br />

AZA-accredited interested institutions<br />

to provide leadership, scientific<br />

management and capacity building<br />

to ensure the sustainability and<br />

conservation of cranes. Cranes, like<br />

cheetahs and most ungulates, are<br />

charismatic, iconic species with populations<br />

that are not self-sustaining.<br />

C2S2 will be focused on two species,<br />

the wattled crane (Grus carunculatus)<br />

and the hooded crane (Grus monacha).<br />

Similar to the cheetah program,<br />

the crane program will allow these<br />

species to be managed in a sustainable<br />

fashion while generating support<br />

for research and in situ activities,<br />

although not production. We envision<br />

various opportunities for ‘crane partners’,<br />

including: (1) direct training to<br />

staff from participating zoos in crane<br />

management (including assisted<br />

breeding), husbandry and research;<br />

and 2) advice and guidance about the<br />

value and complexities of breeding<br />

centers.

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