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The Repopulation Program

Most probably the fingerling stock group had been formed by an ancestry that was not highly representative of the broodstocks and that adopted reproduction management should have benefitted the ancestry that failed to be represented in the broodstock sampling. Twenty-one exclusive alleles alleles of locus Bh5 were reported in the fingerling stock, five in the wild population and four in the broodstock Table 2. Since no alleles were reported in loci Bh6 and Bh17, a lack of equilibrium was detected in the link between the alleles of the three groups.

Although locus Bh6 has the most discrepant allele frequencies among broodstock and wild population, most alleles of the other loci had similar frequencies among these groups. Three out of the four alleles were similar in locus Bh16 for broodstock and wild population, corroborating the genetic similarity between the two groups. Locus Bh13 had a similar situation, or rather, all the alleles in the broodstocks and wild population were similar, with similarity in only one allele in fingerlings bp - 0. A greater number of exclusive alleles in fingerlings reveals genetic difference of the group when compared to broodstocks and wild population.

Colombian condor repopulation program gets technology upgrade

Data of mean observed heterozygosity Ho indicate a greater genetic variability in the wild population and broodstock 0. Sanches and Galetti Jr analyzed populations of B. However, loci Bh6 and Bh13 failed to comply with the expected Hardy-Weinberg equilibrium. In fact, there was a deficit in heterozygosity, corroborating results in the wild populations reported in current analysis Table 3.

On the other hand, the inability of separating near-sized alleles, made difficult by stutter bands in the di-nucleotide microsatellite electrophorese, may have also decreased heterozygosity rates Hassanien and Gilbey ; Shyamala et al. In the case of the fingerling group, mean rates for Ho reached 0. The above results revealed a close genetic factor among these specimens, perhaps due to reproduction management, already indicated by Lopera-Barrero et al.

The two factors may have reduced the effective number of broodstocks and genetic variability. The use of small numbers of broodstocks with specimens in total spawning and non-intentional selection selection of broodstocks with certain specific characteristics are usually the main factors that decrease genetic variability and increase endogamy in fingerlings.

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Further, in the case of inadequate management, possible cannibalism by post-larvae B. A selection of beneficent characteristics for breeding, such as fish selection merely based on external characteristics male: Since the above has not been observed in current assay, the fingerling sampling evaluated may reveal that repopulation may be including gene pools different from those from natural populations, or the absence of important genes for the feasibility of fish in the environment.

Fixation Index F IS provided negative rates excess of heterozygotes in six loci of broodstock population, averaging In the wild population, average F IS was positive 0. In fact, the capture of the species decreased in the last few years Catella et al.

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Decrease in allele richness in broodstocks may cause the animals to lose or limit their capacity to respond to changes in the natural environment Christie et al. AMOVA results show that most variability lies within each population Rates are more representatives in the grouping wild population x broodstocks, and indicate that the two form a single genetically structured population.

Comparison data between wild population and broodstocks with fingerlings reveal that fingerlings have a basic genetic structure that is different from natural populations and from broodstocks.

Let's Play The Repopulation (EP01: Training Facility)

There may have been a decrease in the true number of broodstocks N e due to reproduction management or to cannibalism-control management, or even to the fact that the sample of the broodstocks was not representative. They may be a single population unit, since the group had not been constituted with enough genetic variability. The genetic identity in the groupings wild population x fingerlings 0. Since lowest F ST rate occurred between the wild population and the brookstocks 0. The rate of genetic identity 0. A higher rate for the number of migrants 6.

Results show that the wild population of B. Analyses of fish broodstocks revealed that the animals kept intact their genetic base. Results in current study revealed the profile of fingerling stocks used in the repopulation of B. Genetic variability in the natural population and in broodstocks was high, albeit moderate in the fingerling stock. Now officials in both countries want to address the data gap with a new cellphone-based monitoring system.


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Using implanted beeper chips that emit GPS-based data that is downloaded via cellphone towers, the system can accurately pinpoint a bird's location every 15 seconds. The system is similar to a satellite-based system used to track about half of the condors that the San Diego Zoo has released into the wild in California, Arizona, New Mexico and Baja California, said Michael Mace, curator of birds. It's part of what Mace describes as an "enhancement" of the condor release program that will also include transferring some of the condor breeding capacity to as many as four Colombian zoos.

Colombian condor repopulation program gets technology upgrade

Currently all the condors released here are hatched by some 20 breeding pairs in 17 U. It's up to the Colombians to pay for monitoring, including the costly process of downloading and analyzing the data, and sending people out into remote areas to retrieve it. Colombia still hasn't come up with funding, which can run to several thousand dollars per bird per year.

The Colombian Zoo Association, the Environment Ministry and the national parks system are reviewing the entire condor release program with the aim of transferring more operations here.


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But it's not going to be cheap. A key unknown is whether released condors are reproducing. Saenz said they have produced at least two chicks, one of which is known to have died.


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  6. The status of any others is a mystery, said Alan Lieberman, a retired San Diego Zoo official who played a key role in starting up the Colombia condor release program. Saenz said there is encouraging anecdotal evidence that suggests condors are making something of a comeback - a group of 18 apparently native condors was recently spotted in the Almorzadero paramo in northeastern Colombia, an area they were not previously known to inhabit. But the evidence is purely anecdotal. Without an efficient tracking system, Saenz said, the origin of the condors there can only be guessed at.

    Biologists studying the endangered California condor have launched a new web site to enlist the help of citizen scientists in research aimed at reducing lead poisoning, the primary threat to condors in the wild. Maybe it's a main problem. Changing the ini didn't seem to work for me. I lowered my desktop settings to x, and that looks like a "fix". I'm already using x resolution in my system.

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