These and other data on the protection of species in zoos and aquaria have now been revealed by scientists at the Max Planck Institute for Demographic Research (MPIDR) in Rostock.
Writing in the journal Science, the team of researchers and the International Species Information System (ISIS) advocate the establishment of targeted captive breeding programmes to supplement the protection of animals in the wild. To do this, zoos should team up in networks and shelter these animals, as a form of life insurance, until they can be released back into the wild.
The researchers used data from the International Species Information System (ISIS) to calculate how many of the endangered species can already be found at zoological gardens: 20 to 25 percent of all endangered mammal species are kept at zoos. The overall figure for birds is only slightly less than that, but is much lower for avian species that are acutely at risk of extinction: only nine percent of these are found in captivity. Only three percent of endangered amphibian species are kept in captivity.
The role of zoos for species conservation must not be underestimated, Dalia Conde and Alexander Scheuerlein have stressed. "While it is true that the number of endangered species and individual animals at any one zoo is small", say the biologists, who conduct their research at the MPIDR's Laboratory of Evolutionary Biodemography, "if several institutions link up, zoological gardens will have a considerable collective potential to breed endangered animal species."
Specialist zoos for greater breeding success
The Science authors advocate the establishment of "specialist zoos" that concentrate on breeding just one or a small number of species: "Specialisation generally increases breeding success", say Conde and Scheuerlein. "The animals can be 'parked' at these zoos until they have a chance of survival in the natural environment and can then be returned to the wild." Nate Flesness, who is the scientific director of largest data holdings of zoos (ISIS), and is also co-author of the paper stressed hat it also makes a lot of sense to include animals in breeding programmes at an early stage, before their stocks in the wild decline too much. "Zoos should not be regarded as a last-resort emergency ward, because the chances of successful breeding are decreased if the last surviving, weakened individuals of a species need to be used for this purpose."
Recently, the International Union for Conservation of Nature (IUCN) has also determined how successful captive breeding is at supporting species protection: breeding at zoos has played a key role in 17 of the 68 vertebrate species whose risk status has now been downgraded by the organisation. Examples of these success stories include the Asiatic wild horse (Przewalski's horse), the black-footed ferret (a member of the mustelid family) and the Californian condor.
Breeding programmes at zoos also deliver new demographic data which are useful in species conservation: When is the onset of sexual maturity in an animal species? What is its litter or clutch size? At what intervals does a species reproduce? "Such fundamental data on their demographic development are unknown for many species", say Dalia Conde and Alexander Scheuerlein. "However, they are urgently needed to allow us to estimate the future fate of a species and its chances of survival in the wild".
Owen Jones | EurekAlert!
Global threat to primates concerns us all
19.01.2017 | Deutsches Primatenzentrum GmbH - Leibniz-Institut für Primatenforschung
Reducing household waste with less energy
18.01.2017 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
23.01.2017 | Process Engineering
23.01.2017 | Physics and Astronomy
23.01.2017 | Life Sciences