Brief communication. Establishing a captive broodstock for the endangered Bonytail chub (Gila elegans

Hedrick, PW; Dowling, TE; Minckley, W. L.; Tibbets, C. Alana; Demarais, BD; Marsh, PC

doi:10.1093/jhered/91.1.35

Cited by 30 publications

(23 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If this is not the case, extinction would appear inevitably (Frankel 1983). It is also crucial for endangered species to retain as much genetic variation as possible to enhance the chance for their recovery (Hedrick et al 2000). The conservation of genetic diversity is important for the long-term interest of any species (Hamrick et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Assessing genetic diversity of wild populations of Prenantȁ9s schizothoracin, Schizothorax prenanti, using AFLP markers

Song

Yue

et al. 2006

Environ Biol Fish

View full text Add to dashboard Cite

Prenant's schizothoracin, Schizothorax prenanti, an endemic fish to China, has undergone a dramatic decline in numbers due to human impacts. We studied its genetic diversity in three tributaries of the Yangtze River: the Qingyi River, which has many hydropower dams, and the Dadu River and Muli River where many hydropower dams are being proposed. Using amplified fragment length polymorphism (AFLP), 621 loci were amplified with seven AFLP primer combinations in 45 individuals. The loci were highly polymorphic and heterozygous (87% polymorphism, 30% heterozygosity). The genetic distances within populations were large. The analysis of molecular variance demonstrated that most variation occurred within populations. The estimated fixation index (F st ) value averaged over all polymorphic loci across the three rivers was 0.0837, indicating a moderate genetic differentiation. The differentiations between populations were significant, and population structure was strong. The results suggested that China had wild populations of Prenant's schizothoracin with considerable genetic diversity in the Muli, Dadu and Qingyi rivers. The proposals to dam these rivers should take into account the importance of conserving their genetic quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessing genetic diversity of wild populations of Prenantȁ9s schizothoracin, Schizothorax prenanti, using AFLP markers

Song

Yue

et al. 2006

Environ Biol Fish

View full text Add to dashboard Cite

show abstract

“…Captive breeding has been an important tool for management of such taxa, especially fishes; however, there has been considerable debate over the impacts of such methods on levels of genetic variation as well as other important factors (e.g. Fleming & Gross 1993; reviewed in Hedrick et al . 2000; Minckley et al .…”

Section: Introductionmentioning

confidence: 99%

Genetic monitoring of wild and repatriated populations of endangered razorback sucker (Xyrauchen texanus, Catostomidae, Teleostei) in Lake Mohave, Arizona‐Nevada

et al. 2004

View full text Add to dashboard Cite

The Native Fishes Work Group, formed in 1991, developed and implemented a protocol to enhance the dwindling razorback sucker population in Lake Mohave, Arizona-Nevada. This large, genetically diverse population is severely reduced in size as a result of recruitment failure associated with predation on larvae. To circumvent this problem, wild larvae are captured, reared in protective custody until they are large enough to escape predation, and then released back into the lake. We present results of a monitoring program designed to assess the effectiveness of the sampling design in transmitting the high genetic diversity found in wild adults. Variation in a fragment from the mitochondrial DNA gene cytochrome b was examined by analysis of single-stranded polymorphisms and direct sequencing. Samples were characterized from three life history stages. Characterization of wild adults verified previous results that identified considerable diversity and provided baseline data. Samples of larvae from several temporal collections from throughout the spawning season and four geographical areas were characterized for 7 years (1997-2003) to assess the transmission of genetic variation from wild adults to larvae. Several analyses identified significant differences among temporal collections, resulting from sampling errors associated with finite number of females spawning at a given time and place. Comparisons among areas and years failed to identify significant variation, indicating that pooled collections for each year possess the same levels and patterns of genetic variation. Examination of repatriates representing 11 years (1992-2002) also failed to identify significant differences among cohorts; however, some sample sizes were small and the amova may lack sufficient power to detect differences. Contrasts of wild adults, larvae, and repatriates identified statistically significant differences among collections within these three groups; however, levels of variation are small and not biologically meaningful. More importantly, this analysis failed to detect significant differences among adults, larvae, and repatriates indicating that the program has been achieving its goal of transmitting variation from adults through the larvae and into the repatriate population. The reproductive capability of repatriates has not been examined, so it is unknown if the program will maintain genetic variation found in the original adult population. This will be most easily achieved by periodic monitoring of genetic variation in larval samples. If levels of variation become reduced in repatriates, levels and patterns of diversity in larvae are also expected to become reduced, and deviations in estimates of genetic diversity may become larger and more frequent. If this is the case, intervention may be necessary to ensure that certain individuals are not over-represented in the repatriate population.

show abstract

“…If this is not the case, extinction would appear to be inevitable. It is also crucial for endangered species to maintain as much genetic variation as possible to enhance their chances for population recovery (Hedrick et al 2000).…”

mentioning

confidence: 99%

Mitochondrial DNA reveals low population differentiation in elongate loach, Leptobotia elongata (Bleeker): implications for conservation

Liu

Zhou

2011

Environ Biol Fish

View full text Add to dashboard Cite

Elongate loach (Leptobotia elongata (Bleeker)), an endemic fish species to China, is a famous ornamental freshwater fish. Here, a comparative study of mtDNA control region (D-loop) (835 bp) sequences was performed to analyze its wild population structure and evaluate the genetic diversity for 110 individuals from five locations in the upper reaches of the Yangtze River, China. A total of 49 polymorphic sites and 45 haplotypes yielded high haplotype diversity (h=0.952), but low nucleotide diversity (π=0.00454) as that of many fish species.

show abstract

Brief communication. Establishing a captive broodstock for the endangered Bonytail chub (Gila elegans

Cited by 30 publications

References 0 publications

Assessing genetic diversity of wild populations of Prenantȁ9s schizothoracin, Schizothorax prenanti, using AFLP markers

Assessing genetic diversity of wild populations of Prenantȁ9s schizothoracin, Schizothorax prenanti, using AFLP markers

Genetic monitoring of wild and repatriated populations of endangered razorback sucker (Xyrauchen texanus, Catostomidae, Teleostei) in Lake Mohave, Arizona‐Nevada

Mitochondrial DNA reveals low population differentiation in elongate loach, Leptobotia elongata (Bleeker): implications for conservation

Contact Info

Product

Resources

About