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39 results for “Captive Populations”
Figure 5 in Tetraploidy in the Boettger's dwarf clawed frog (Pipidae: Hymenochirus boettgeri) from the Congo indicates non-conspecificity with the captive population
Figure 5. Hymenochirus sp. (IVB-H-Hsp06, female), sequential fluorescent chromosome mapping (DAPI, CMA3, C-banding, rDNA FISH), non-sequential snDNA FISH, and whole-genome painting on metaphase spread. A, DAPI (B&W) counter-stained metaphase spread shows all 21 chromosomes. B, CMA3 banding in green shows NOR locus on the p arm of chromosome 4. CMA3 signal co-localizes with 28S locus. C, C-banding (B&W, brighter staining) highlights heterochromatic blocks on telomeric and pericentromeric regions of almost all chromosomes. In addition, the whole B chromosome is intensely banded (arrow). D, 5S (green) and 28S (red) rDNA loci are located on the q arm of chromosome 6 and p arm of chromosome 4, respectively. The 5S rDNA is situated on two different chromosomal loci within the single q arm. E, the snDNA loci U1 (red) and U2 (green) are located on the p arm of chromosome 1 and the q arm of chromosome 8, respectively. F, the GISH experiment of the H. boettgeri whole-genome painting probe, which hybridizes on Hymenochirus sp. chromosomes. All chromosomes are painted (red) except one, B chromosome, which shows no GISH signal and is DAPI-positive (arrow). Scale bars represent 10 μm.
Figure 2 in Tetraploidy in the Boettger's dwarf clawed frog (Pipidae: Hymenochirus boettgeri) from the Congo indicates non-conspecificity with the captive population
Figure 2. Phylogenetic trees of dwarf clawed frogs. Maximum likelihood mtDNA (16S, left) and nDNA (rag1, right) trees showing the positions of karyotyped individuals (in bold) in the context of available molecular sampling retrieved from GenBank (acc. nos. listed). For sampling details, see Supporting Information, Table S1.
Figure 1 in Tetraploidy in the Boettger's dwarf clawed frog (Pipidae: Hymenochirus boettgeri) from the Congo indicates non-conspecificity with the captive population
Figure 1. Dwarf clawed frogs, Hymenochirus sp. (captive population) and H. boettgeri. A, Hymenochirus sp., female (IVB-H-Hsp06) and male (IVB-H-Hsp02) in amplexus. B, Hymenochirus sp., female in dorsolateral view (IVB-H-Hsp04). In (A) and (B), note the relatively smooth flanks and hindlegs with homogeneous, unenlarged tubercles. C, Hymenochirus boettgeri from the north-western part of the Republic of the Congo (male, IVB-H-CG17-356). D, holotype of H. boettgeri, female (ZMB 11521). The area marked by the red rectangle is detailed in (E). F, Hymenochirus boettgeri from the same locality as the karyotyped individual (IVB-H-CG17-112, male). In (C–F), note the enlarged and spiny tubercles on the flanks and hindlegs typical for H. boettgeri.
Data from: Are shy individuals less behaviorally variable? Insights from a captive population of mouse lemurs
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Data from: A conservation hatchery population of Delta Smelt shows evidence of genetic adaptation to captivity after 9 generations
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Data from: The impacts of inbreeding, drift, and selection on genetic diversity in captive breeding populations
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Data from: Rapid genetic and morphologic divergence between captive and wild populations of the endangered Leon Springs pupfish, Cyprinodon bovinus
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Data from: Population correlates of rapid captive-induced maladaptation in a wild fish
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Data from: Senescence or selective disappearance? Age trajectories of body mass in wild and captive populations of a small-bodied primate
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Predictive genetic plan for a captive population of the Chinese goral (Naemorhedus griseus) and prescriptive action for ex situ and in situ conservation management in Thailand
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Data from: Inbreeding and selection shape genomic diversity in captive populations: implications for the conservation of endangered species
Captive breeding programs are often initiated to prevent species extinction until reintroduction into the wild can occur. However, the evolution of captive populations via inbreeding, drift, and selection can impair fitness, compromising reintroduction programs. To better understand the evolutionary response of species bred in captivity, we used nearly 5500 single nucleotide polymorphisms (SNPs) in populations of white-footed mice (Peromyscus leucopus) to measure the impact of breeding regimes on genomic diversity. We bred mice in captivity for 20 generations using two replicates of three protocols: random mating (RAN), selection for docile behaviors (DOC), and minimizing mean kinship (MK). The MK protocol most effectively retained genomic diversity and reduced the effects of selection. Additionally, genomic diversity was significantly related to fitness, as assessed with pedigrees and SNPs supported with genomic sequence data. Because captive-born individuals are often less fit in wild settings compared to wild-born individuals, captive-estimated fitness correlations likely underestimate the effects in wild populations. Therefore, minimizing inbreeding and selection in captive populations is critical to increasing the probability of releasing fit individuals into the wild.
Supplementary material 1 from: Saldarriaga-Gómez AM, Ardila-Robayo MC, Medem F, Vargas-Ramírez M (2023) Hope is the last thing lost: Colombian captive-bred population of the critically endangered Orinoco crocodile (Crocodylus intermedius) is a genetic reservoir that could help to save the species from extinction. Nature Conservation 53: 85-103. https://doi.org/10.3897/natureconservation.53.104000
Supplementary information
Data from: Association mapping of morphological traits in wild and captive zebra finches: reliable within but not between populations
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Data for: Reproductive success of captive-reared Allegheny Woodrats (Neotoma magister) released into genetically depauperate populations
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Data from: Inbreeding and selection shape genomic diversity in captive populations: implications for the conservation of endangered species
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Regional variation in the cheetah (Acinonyx jubatus) revisited: morphology of wild and captive populations
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Data from: Quantifying realized inbreeding in wild and captive animal populations
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Data from: Long-term trends in wild-capture and population dynamics point to an uncertain future for captive elephants.
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Behavior and welfare of an all-male band of captive Gelada monkeys (<em>Theropithecus gelada</em>): A comparison with other populations and implications for management
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