• Behaviour/phenotypic traits of the young hybrids tend towards surrogate species. Evidence for adaptive introgression of exons across a hybrid swarm in deer. Four individuals classified in the field as red deer, but assigned to the pure sika class by STRUCTURE and NewHybrids, possessed the red deer mitochondrial haplotype, confirming their hybrid status. We were not able to obtain sika deer samples from all regions where both species co-occur because harvesting of sika deer was not conducted at some places. Eleven of the loci used in this study were used previously by Senn and Pemberton (2009) and Senn et al. (1999) described the hybridization process in Scottish populations as a bimodal hybrid zone, with deer falling into 2 distinct classes (red deer–like and sika-like). Numbers on interconnecting lines represent the number of mutational steps.,. To compare the measures of genetic diversity between the species, we used a permutation test implemented in FSTAT. Examination of mtDNA data indicated that hybridization has occurred mostly between sika stags and red deer hinds. Currently, it seems possible that, in time, the level of hybridization found at West Loch Awe could also be found across the whole of the peninsula. 2001; Wittenberg and Cock 2001). For full access to this pdf, sign in to an existing account, or purchase an annual subscription. The presence of the Manchurian haplotype in the population from Kaliningrad might be explained by the fact that the introduction of sika in the area of the former Soviet Union was conducted with individuals from the Russian Far East (Bartoš 2009). On the basis of historical evidence that red deer entered Kintyre only recently, a diffusion model evaluated by maximum likelihood shows that sika have increased at approximately 9.2% yr-1 from low frequency and disperse at a rate of approximately 3.7 km yr-1. Zool. —Locus-specific diversity measures estimated for the total sample (n = 191) of native red deer (E, n = 157) and introduced sika deer (N, n = 34), from 5 regions in Poland, the Kaliningrad District (Russia), and Lithuania. eCollection 2020 Feb. Safner T, Buzan E, Iacolina L, Potušek S, Rezić A, Sindičić M, Kavčić K, Šprem N. Genetica. Each of the 224 individuals was assigned to either the sika deer cluster (when membership probability is 0 = Q = 0.05), red deer cluster (0.95 = Q ≤ 1), interspecific hybrid of red type (0.75 = Q ≤ 0.95), sika type (0.05 = Q ≤ 0.25), or hybrids of equal ancestry (0.25 = Q ≤ 0.75) that are probable 1st-generation hybrids. Despite being separate species, and this is one of the issues that muddies the waters when trying to define what a species actually is, Red and Sika deer are sufficiently closely related that they can inter-breed and produce fertile calves. We calculated 1-sided probability values for the observed heterozygosity and gene diversity to test if they were higher in red deer. Introgression of nonnative genes into the genome can increase the extinction risk of a native population by causing outbreeding depression (Edmands 1999; Gilk et al. sika deer. The hybrids are fertile in both sexes. McDevitt A. D. Edwards C. J. O'Toole P. O'Sullivan P. O'Reilly C. Carden R. F.. McNeely J. Mol Ecol. Choosing the threshold values for hybrid detection is always a critical point because it strongly affects the identification of hybrids and introgressed individuals. Individuals previously identified as “red type” hybrids were classified as F2 individuals, or partly as F2 individuals and partly as pure red deer. This contrasts with the causes of classic mosaic hybrid zones (selection induced by habitat variability). Abstract This article summarizes current knowledge on the ongoing hybridization between the 2 species in Scotland, and discusses its implications for the future of deer in Scotland, and the probable impact on the Scottish rural economy. sika deer translation in English-French dictionary. where red and sika deer become sympatric. The hybridization process at the molecular level has never been studied in Eastern Europe. We investigated population structure, estimated null-allele frequency and assigned individual hybrid scores using a Bayesian clustering algorithm implemented in structure 2.2. 2003; Rhymer and Simberloff 1996). and hybridization and introgression with native Red Deer. 2009; Senn and Pemberton 2009). (1999). This finding does not support the suggestion that hybridization is promoted when the population of the introduced species remains small, that is, sika stags mate with red deer females that are more abundant. Hybridization between red and sika deer.—Our analysis of 14 hypervariable, unlinked microsatellite loci and an mtDNA marker in a sample of 225 red and sika deer from 5 different regions in Poland, Kaliningrad District, and Lithuania revealed ongoing hybridization between these 2 species across a large geographical scale. With a set of microsatellite loci and a mitochondrial marker, we uncovered extensive hybridization in all regions despite different population dynamics and no reports of hybrid individuals. Here, we present a study of hybridization and introgression between native red deer (Cervus elaphus) and introduced sika deer (C. nippon) from regions in Eastern Europe where these 2 species co-occur. 2020 Sep 15;10(20):11372-11386. doi: 10.1002/ece3.6774. Numbers of individuals used for calculations (n) are shown in the 1st row and significance levels are shown below the diagonal (an asterisk [*] indicates significance at the 0.003 level; NS indicates not significant at the 0.05 level). Two of those individuals came from the Kaliningrad District population and 2 from the Kadyny forest. Hybridisation is causing increases in the body weight of sika-like deer and decreases in the body. Polymerase chain reaction products were purified and sequenced using both forward and reverse primers. We used the FindModel application (Los Alamos National Security, LLC 2010) to select the model of nucleotide substitution that best fit the data using the Akaike information criterion. The number of individuals bearing each haplotype is shown in parentheses. We argue that the pattern of differential introgression across the study area is primarily due to the rarity of hybridization events between the two species and the limited time the two species have been in contact (< 120 years). All the haplotypes obtained have been deposited in Genebank (accession numbers HQ534296 and HQ534297 for sika deer and HQ534299–HQ534310 for red deer). Genetic diversity analysis.—Estimates of genetic diversity of both species were obtained after exclusion of individuals identified as hybrids in the admixture analysis (described below). We sampled 49 red deer in Pszczyna forest (Polish southern population), 41 red deer in Kadyny forest (Polish northern population), 18 red deer in Kaliningrad District (Russia), and 39 red deer in Lithuania (Fig. 2006; Goodman et al. Nevertheless, the level of allele sharing was higher than that detected in the Scottish population. Many of the park deer that were introduced to Ireland contain genes from Eastern European red deer, and also probably some wapiti and sika blood. Mitochondrial DNA diversity.—The number of mito-chondrial sequences obtained from each population along with the distribution of haplotypes between the sampling sites is presented in Fig. This contrasts with the results of Senn and Pemberton (2009), who found no intermediate hybrids in their study with the exception of 1 site. (1999). NewHybrids classifies individuals into 6 different classes: pure red deer, pure sika deer, 1st-generation hybrids (F1), 2nd-generation hybrids (F2), and backcrosses of F1 with each of the parental species. A comparable study in Ireland (McDevitt et al. In other words, they can hybridize to produce offspring that are genetically part Sika, part Red deer. Hybridisation between red deer (Cervus elaphus) and Japanese sika (C. nippon) on the Kintyre Peninsula, Scotland. obs. Red deer are widespread with high levels of connectivity among populations, whereas sika deer were introduced in relatively small numbers from limited sources. These sets of individuals were used as parental populations to create a simulated number of 20 of each 1st-generation (F1) and 2nd-generation (F2) hybrids and lst-generation backcrosses (F1 × red deer and F1 × sika deer). (Rozas et al. Prevention and treatment information (HHS). Branch confidence values were estimated using the estimated likelihood weights approach (Strimmer and Rambaut 2002), in which values of ≥70% were considered good support for a clade (Hillis and Bull 1993). Red and sika deer can interbreed in enclosures (Bartoš 2009; Harrington 1982) and in the wild (Diaz et al. We thank all the people who contributed to sample collection, especially L. Balciukas, who provided samples from Lithuania, W. Bragiel from Kobiór Forest Inspectorate, W. Tylkowski from Kadyny Forest Inspectorate, J. Bobek from Zaporowo Forest Inspectorate, and E. Kozlowski, who provided samples from Kaliningrad District. Here data from populations of native red deer Cervus elaphus and invasive sika deer Cervus nippon in Scotland is used to assess the extent to which hybridisation between them is causing phenotypic change. Female sika deer care for their young up to one year after their birth and fawns reach reproductive maturity between 16 and 18 months of age. The haplotype found in Kadyny groups with haplotypes from southern Japan, whereas the haplotype from the Kaliningrad District groups with haplotypes from Manchuria. Additionally, we obtained sequences for a number of individuals from all populations used in this study to assess population structure and to identify the origin of introduced sika individuals. Female sika deer may associate with other males to gain access to several feeding grounds. Originally, the 7 imported animals were kept in captivity, but were subsequently released in the neighboring forests near Pszczyna. Overall nucleotide diversity (π), number of segregating sites (S), and haplotype diversity (HD) were 0.0088, 28, and 0.874, respectively, for red deer, and 0.0101, 39, and 0.159, respectively, for sika deer. Microsatellite genotyping.—The DNA was extracted from ethanol-preserved tissue using a NucleoSpin Tissue Kit (Macherey and Nagel, Dueren, Germany) according to the manufacturer's protocol. For our data, it was impossible to select a sample of pure parental genotypes of both species. We used 14 microsatellite loci to evaluate the extent of hybridization. Interestingly, all 4 individuals that were identified in the field as sika deer were classified genetically as very close to red deer. Here, we investigate the potential role of male vocal behavior in the red6sika hybridization process, by conducting playback experiments using two-speaker choice tests of conspecific (red deer) vs. heterospecific (sika deer) male mating calls on female red Of 39 individuals of phenotypical red deer from Lithuania, only 1 was assigned to the intermediate hybrid class. We use the abbreviation E for red deer and N for sika deer throughout the text. Here, we used variation at 22 highly differentiated microsatellite loci and one mitochondrial DNA (mtDNA) marker in a sample of 735 individuals, to investigate the genetic consequences of an introduction of Japanese sika deer (Cervus nippon) for native red deer (C. elaphus) on the Kintyre Peninsula in Scotland. Sika deer ( Cervus Nippon ) and wapiti ( Cervus elaphus ) are closely related species and their hybridization can result in significant allele-shift of their gene pool. Hybridization between Sika and Red deer (Cervus elaphus L.) has occurred frequently in deer parks but has been reported only recently from feral and wild stocks. This approach allowed us to avoid identifying individuals that share alleles due to ancestral polymorphism as hybrids. Age at maturity in wild baboons: genetic, environmental and demographic influences. An AMOVA revealed that 39.3% of the genetic variation was between species, 2.3% of variation was distributed among populations within species, and 58.4% of variation was found within populations. 1994 Dec;3(6):551-62. doi: 10.1111/j.1365-294x.1994.tb00086.x.  |  Numbers on branches indicate support of ≥70% obtained by the estimated likelihood weights approach. We found only 2 haplotypes among 26 samples. From our data, it seems that it is difficult to identify hybrids on the basis of their external appearances. To assess the structure of red deer populations based on haplotype diversity, we performed an AMOVA in Arlequin 3.0 (Excoffier et al. More generally, there was strong concordance between the 2 assignment methods (Table 3). >Similarly, we detected high numbers of red deer mtDNA haplotypes that did not show pronounced population structure, suggesting high migration abilities and no barriers to gene flow among eastern European populations. 1999; Weigel et al. In this chapter all details relate to pure Japanese sika unless otherwise stated. However, more effective legal frameworks reducing threats posed by sika deer are necessary. Because hybridization between red and sika deer has already been reported in natural populations elsewhere, we predicted that it also occurs in Eastern Europe, although it seems to be unnoticeable in the field and is therefore widely dismissed by hunters. Individuals identified as hybrids were excluded from these analyses. 1. (1999) and Senn and Pemberton (2009), we cannot transfer this assumption to our study system because different species histories in continental Europe and on the British Isles could lead to different allele frequencies. Sika Deer Young: Calf Japanese sika deer are the smallest of our three deer species, with a marked difference in coat colour between summer and winter. Special thanks to E. Lessa, who helped with language corrections and gave essential comments on the manuscript. Ongoing hybridization that results in admixture of parental genes from 2 different species and introgression (i.e., transfer of genes from one species to another by repeated backcrossing), can cause the native population to be replaced by one genetically and phenotypically resembling the nonnative form in some traits (Huxel 1999). The population of sika deer from Kaliningrad District was excluded from the analysis because only 1 individual was not identified as a potential hybrid. Genetic population structure of invasive raccoons (Procyon lotor) in Hokkaido, Japan: Unique phenomenon caused by pet escape or abandonment. Haplotypes 1 and 2 belong to sika deer. One might therefore expect hybridisation to be selectively disadvantageous for red deer males and sika females, but selectively advantageous for sika males and red deer females (Abernethy 1994b). NIH The introgression of introduced Asiatic Sika deer into Scottish Red deer - does hybridisation matter? 2001; Chazara et al. Senn HV, Barton NH, Goodman SJ, Swanson GM, Abernethy KA, Pemberton JM. 2009). McFarlane SE, Hunter DC, Senn HV, Smith SL, Holland R, Huisman J, Pemberton JM. Furthermore, we found intermediate hybrids in all of our sample sites. To overcome this problem, we selected a set of 20 individuals of each species that were identified as nonadmixed (Q ≥ 0.95 for red deer and Q ≤ 0.05 for sika deer) in the preliminary run of STRUCTURE. 3.0: an integrated software package for populationgeneticsdata analysis, Inference of population structure using multilocus genotype data: linked loci and correlated allele frequencies. We found a total of 35 (15.5%) hybrid individuals in all regions studied, including the region where no sika deer population is established. NLM Maximum-likelihood phylogenetic tree of the sika deer haplotypes obtained in this study combined with data from Nagata et al. II. Although red deer and sika deer in all regions we studied have been in contact for a relatively short period of time (around 150 years), the hybridization process seems to be extensive, possibly causing threats to native red deer populations. In this study, we used molecular markers to evaluate whether hybridization between red and sika deer has occurred in Eastern Europe and to assess the current extent and distribution of gene flow between these 2 species. All individuals identified as putative hybrids are listed in Table 3. Map of the study area with sampling sites in Poland, the Kaliningrad District of Russia, and Lithuania. The mitochondrial DNA haplotypes are reported in GenBank under accession numbers HQ534296–HQ534310. We were not able to obtain a sample of pure sika deer genotypes because this species is in contact with red deer in all of our sampling locations. All sampling sites are presented in Fig. The most likely number of populations in the data set (K) was estimated by conducting 10 independent replicates for each value of K between 1 and 8, using 100,000 final iterations after a burn-in period of 100,000 iterations. Areas where red and sika deer are sympatric need to be assessed for the level and extent of hybridisation occurring and thus need to be managed in order to protect the genetic integrity of ‘pure’ red deer populations. (1999) describing phylogeography of sika deer on the Japanese islands. 1999; McDevitt et al. Hybridization between red and sika deer.—Our analysis of 14 hypervariable, unlinked microsatellite loci and an mtDNA marker in a sample of 225 red and sika deer from 5 different regions in Poland, Kaliningrad District, and Lithuania revealed ongoing hybridization between these 2 species across a large geographical scale. Taking into account that our sample size was much smaller than in the Scottish study, finding a high number of 1st-or 2nd-generation hybrids suggests that hybridization events are frequent and that crosses between hybrids occur. Attempts at mating between sika stags and red deer hinds also were observed in the field (Bartoš and žirovnicky 1982). Hybridisation between introduced and endemic species causes conservation concerns, but also provides us with an opportunity to study the dynamics of gene flow between two species as they first meet. Hybridisation is also … Nevertheless, it is surprising that in our data set no hybrids were identified by hunters, especially in the light of the recent findings of Senn et al. 309-310) comments that "Despite the longer gestation period by approximately six weeks of the latter species [i.e., Père David’s Deer], there are several authentic recordings of successful hybridization between Red deer and Père David’s deer. Hybridizace siky (Cervus nippon Temm.) Epub 2020 Jan 25. The ecological niche occupied by sika deer is similar to whitetail deer and red deer allowing for chances to hybridize. Female red deer were inseminated with sika deer semen to generate hybrid gestations, according to the preferred direction of the introgression between the two species (sika deer male x red deer female, Senn & Pemberton, 2009). However at one site, West Loch Awe, 43% of individuals were hybrids. 2010; McDevitt et al. 1.Hybridisation with an invasive species has the potential to alter the phenotype and hence the ecology of a native counterpart. 2010). Mickiewicza 33, 31-120; Kraków, Poland. Sika deer samples come from one region in Poland (Kadyny forest, 46 individuals), and from Kaliningrad District (Russia, 4 individuals). Possible genetic consequences of the presence of alien species include reduced fitness and disruption of local adaptation via the intro… Mitochondrial DNA introgression.—Mitochondrial DNA (mtDNA) introgression was rare and mainly from red to sika (5 of 6 cases), Q-values for those individuals were 0.720 (F2 in NewHybrids), 0.926 (F2 in NewHybrids), 0.997 (pure sika in NewHybrids), and 0.980 (pure sika in NewHybrids). Sika deer: Have a much higher fertility rate than the native Red Deer. The threshold of Q = 0.05 in STRUCTURE was able to detect hybrids in studies with 12 or more microsatellite loci when the FST-value was 0.21 (Vähä and Primmer 2006). Contrary to Great Britain, the red deer populations in continental Europe are large and have not gone through a phase of strong decline (Bützler 1986). Haplotype diversity was calculated in DnaSp version 5. For the same reasons complete culling also seems to be impossible; moreover, attempts to significantly reduce population numbers are not desirable from a conservation point of view, because heavy, but incomplete culling can trigger or intensify the hybridization process. Epub 2015 Mar 25. Additive genetic effects and putative heterotic effects of their hybridization on growth performance could confer considerable economic advantage in deer farming. For values of K = 1, we obtained an average In Pr(X/K) of −27,356, and for K = 3–8, average In Pr(X/K) ranged from −23,876 to −26,257. Biological Sciences, A global strategy on invasive alien species. A consequence of introduction of alien species can be hybridization with a closely related native species. The microsatellite loci used by these studies were selected for having no shared alleles between sika and red deer. The southern population never reached high numbers and remains stable to date at about 20 individuals, whereas the northern one reached about 250 individuals in the mid-1960s, and expanded its range toward the east and south. —Results of admixture analysis for individual native red deer and introduced sika deer sampled from 5 regions in Poland, the Kaliningrad District (Russia), and Lithuania, identified as hybrids by at least 1 of 2 methods. 2005). Instances of hybridization between endemic and alien species pose a threat to species integrity but also provide us with an opportunity to study the dynamics of gene flow between two species as they first meet. Additionally, we sampled 29 red deer in an area located about 200 km southeast from the northern Polish sika location (Piska forest), because there were several observations of sika stags migrating in that direction. (1999) and Senn and Pemberton (2009). Allendorf F. W. Leary R. F. Spruell P. Wenburg J. K.. Chan C. Ballantyne K. N. Aikman H. Fastier D. Daugherty C. H. Chambers G. K.. Diaz A. Hughes S. Putman R. Mogg R. Bond J. M.. Goodman S. J. Barton N. H. Swanson G. Abernethy K. Pemberton J. M.. Ludt C. J. Schroeder W. Rottmann O. Kuehn R.. McCullough D. R. Takatsuki S. Kaji K.