scholarly journals Reproductive traits in captive and free-ranging males of the critically endangered Iberian lynx (Lynx pardinus)

Reproduction ◽  
2010 ◽  
Vol 139 (1) ◽  
pp. 275-285 ◽  
Author(s):  
Natalia Gañán ◽  
Adrián Sestelo ◽  
J Julián Garde ◽  
Fernando Martínez ◽  
Astrid Vargas ◽  
...  
Keyword(s):  
Captive Breeding ◽  
Semen Quality ◽  
Sperm Quality ◽  
Reproductive Traits ◽  
Ex Situ ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Normal Sperm ◽  
Free Ranging

The Iberian lynx (Lynx pardinus) is the most endangered felid in the world. Adequate genetic management of in situ and ex situ populations, and linkage between both, require knowledge on male reproductive biology and factors influencing it. We examined the influence of age, free-ranging versus captive conditions and seasonality on phenotypic, endocrine and semen traits, and links between reproductive traits and male fertility. Males had relatively small testes, produced low sperm numbers, a low proportion of normal sperm, and a high proportion of motile sperm. Young (2-year-old) males had lower testosterone levels, fewer sperm, and a lower proportion of motile and normal sperm than ≥4-year-old males. No major differences were found in semen traits before and after the mating season or between free-ranging and captive males, although the latter had better sperm motility. Males with larger relative testes weight and more sperm copulated more frequently, whereas males that produced more sperm with higher motility produced more cubs per female. In conclusion, small relative testes size and low sperm quality could indicate either low levels of sperm competition or high levels of inbreeding. Young males are probably subfertile; there is a slight trend for males in the captive breeding programme to have better semen quality than wild males, and males with higher sperm production are sexually more active and more fertile. These findings have major implications for decisions regarding which males should breed, provide samples for the genetic resource bank, or participate in programmes involving the use of assisted reproductive techniques.

scholarly journals Benign juvenile idiopathic epilepsy in captive Iberian lynx (Lynx pardinus) in the ex situ conservation program (2005–2019)

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Juan J. Mínguez ◽  
Yasmin El Bouyafrouri ◽  
José A. Godoy ◽  
Antonio Rivas ◽  
Jesús Fernández ◽  
...  
Keyword(s):  
Early Onset ◽  
Clinical Signs ◽  
Ex Situ ◽  
Idiopathic Epilepsy ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Long Term Outcome ◽  
Conservation Program ◽  
Subsequent Decrease

Abstract Background Benign juvenile idiopathic epilepsy has been described in humans but rarely in animals. The objectives of the study were to describe the clinical signs, clinical data, imaging findings, genetic examinations, treatment, long-term outcome and prognosis in Iberian lynx with juvenile epilepsy. Medical records, video recordings and diagnostic data from 2005 to 2019 were reviewed. Results Twenty lynx cubs with early onset of epileptic seizures (ES) from the conservation program were included. The average age at seizure onset was 75 days. Isolated and cluster ES were recorded. Focal ES, focal ES evolving into generalized ES with a stereotypical pattern and generalized ES were observed. All the cubs were normal between episodes, had a normal neurological examination and unremarkable investigations. Phenobarbital was used as a first line antiepileptic drug (AED). ES halted 10 days (0–34) after starting treatment in eight out of twenty cubs (40%). Treatment was discontinued in this group after a mean of 578 days and no further ES were reported (mean follow-up longer than 5 years). Eleven animals (55%) continued on AED treatment for a mean of 1306 days (70–3466). An adult-onset was observed for one lynx (5%). Polytherapy was necessary in seven lynxes (35%). The inheritance pattern observed was compatible with an autosomal recessive condition. Based on this assumption, mating between two identified carriers has been avoided since 2012, which may have contributed to the subsequent decrease in prevalence, with no further cases detected in 2018 and 2019. Conclusions Lynx pardinus may have an early onset self-limiting ES syndrome characteristic of benign juvenile idiopathic epilepsy. Information obtained from this study strongly suggests a genetic basis for the here presented epilepsy.

scholarly journals Assessment of semen quality, sperm cryopreservation and heterologous IVF in the critically endangered Iberian lynx (Lynx pardinus)

2009 ◽  
Vol 21 (7) ◽  
pp. 848 ◽  
Author(s):  
Natalia Gañán ◽  
Raquel González ◽  
J. Julián Garde ◽  
Fernando Martínez ◽  
Astrid Vargas ◽  
...  
Keyword(s):  
Semen Quality ◽  
Statistical Significance ◽  
Egg Yolk ◽  
Domestic Cat ◽  
Critically Endangered ◽  
Lynx Lynx ◽  
Sperm Cryopreservation ◽  
Iberian Lynx ◽  
Lynx Pardinus

Semen traits and factors affecting sperm cryopreservation were assessed in the Iberian lynx (Lynx pardinus), a species regarded as the most endangered felid in the world. For cryopreservation, semen was washed, resuspended in a Tes–Tris-based diluent (TEST) or a Tris-based diluent (Biladyl), both with 20% egg yolk and 4% glycerol, loaded into straws, cooled to 5°C using an automated programmable system and frozen on nitrogen vapour. Heterologous IVF of in vitro-matured domestic cat oocytes was used to test the fertilising ability of cryopreserved spermatozoa. Electroejaculates from five males were obtained. Characterisation of the electroejaculates revealed mean (± s.e.m.) values of 3.3 ± 0.6 × 106 total spermatozoa, 73.6 ± 4.6% motile spermatozoa, 23.7 ± 4.0% morphologically normal spermatozoa and 40.7 ± 2.3% spermatozoa with intact acrosomes. After thawing a higher percentage of motile spermatozoa was seen in TEST than in Biladyl (34.0 ± 6.2% v. 7.5 ± 4.8%, respectively; P < 0.05); however, there were no differences in the percentage of intact acrosomes between the two diluents. Iberian lynx spermatozoa fertilised domestic cat oocytes in vitro, with higher fertilisation rates observed for spermatozoa cryopreserved in TEST than in Biladyl, although the difference did not reach statistical significance (20.5 ± 4.5% v. 11.5 ± 6.8%, respectively). There were positive significant relations between the fertilisation rates and both the percentage of normal spermatozoa and the percentage of spermatozoa with an intact acrosome before cryopreservation (P = 0.04). This first report of the collection and cryopreservation of Iberian lynx semen and analysis of fertilising ability is an important step in the development of assisted reproductive techniques for this critically endangered felid species.

Fatal Streptoccocus canis Necrotizing Fasciitis and Myositis in a Free-Ranging Iberian Lynx (Lynx pardinus)

2019 ◽  
Vol 55 (3) ◽  
pp. 717
Author(s):  
Fernando Nájera ◽  
Susana Sánchez-Cuerda ◽  
Maria Gil-Molino ◽  
Elisa Varela ◽  
Rodrigo Serra ◽  
...  
Keyword(s):  
Necrotizing Fasciitis ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Free Ranging

scholarly journals Iberian Lynx (Lynx pardinus) personality: A rating assessment with ex Situ Conservation Program sample.

2021 ◽  
Author(s):  
Yulán Úbeda ◽  
Victoria Asensio ◽  
Antonio Rivas ◽  
Rodrigo Serra ◽  
Jaume Fatjó ◽  
...  
Keyword(s):  
Ex Situ Conservation ◽  
Ex Situ ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Conservation Program ◽  
Program Sample

scholarly journals Epidemiology of Ancylostoma spp. in the endangered Iberian lynx (Lynx pardinus) in the Doñana National Park, south-west Spain

2004 ◽  
Vol 78 (2) ◽  
pp. 179-183 ◽  
Author(s):  
J. Vicente ◽  
F. Palomares ◽  
A. Ruiz de Ibañez ◽  
J. Ortiz
Keyword(s):  
National Park ◽  
Ecological Factors ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Doñana National Park ◽  
Lynx Pardinus ◽  
South West ◽  
Faecal Samples ◽  
Potential Pathogenicity ◽  
Free Ranging

AbstractThe epidemiology of Ancylostoma spp. was studied in the endangered Iberian lynx (Lynx pardinus) in the Doñana National Park, south-west Spain. Faecal samples were collected throughout a complete annual cycle (August 1997 to September 1998). The overall egg prevalence of Ancylostoma spp. was 57.8%. The pattern of abundance of Ancylostoma spp. eggs in faeces was overdispersed. Juvenile lynx demonstrated a statistically higher prevalence and abundance of Ancylostoma spp. than in adults. These levels of egg output (maximum 21195 epg), as previously reported in free ranging large felid cubs, could be close to disease involvement. The potential pathogenicity of hookworms and the influence of individual and ecological factors on hookworm transmission in the Iberian lynx from the Doñana National Park population are discussed.

scholarly journals Parasites of the Reintroduced Iberian Lynx (Lynx pardinus) and Sympatric Mesocarnivores in Extremadura, Spain

Pathogens ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 274
Author(s):  
Ana M. Figueiredo ◽  
Luís Madeira de Carvalho ◽  
María J. P. González ◽  
Rita T. Torres ◽  
Samuel Pla ◽  
...  
Keyword(s):  
Captive Breeding ◽  
Parasite Burden ◽  
Lynx Lynx ◽  
Parasite Diversity ◽  
Toxocara Cati ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Surveillance Programs ◽  
Cross Transmission ◽  
Egyptian Mongoose

The Iberian lynx (Lynx pardinus) is one of the most endangered felid species in the world. Conservation efforts have increased its population size and distribution and reinforced their genetic diversity through captive breeding and reintroduction programmes. Among several threats that the Iberian lynx faces, infectious and parasitic diseases have underlined effects on the health of their newly reintroduced populations, being essential to identify the primary sources of these agents and assess populations health status. To achieve this, 79 fresh faecal samples from Iberian lynx and sympatric mesocarnivores were collected in the reintroduction area of Extremadura, Spain. Samples were submitted to copromicroscopic analyses to assess parasite diversity, prevalence, and mean intensity of parasite burden. Overall, 19 (24.1%, ±15.1–35.0) samples were positive for at least one enteric parasite species. Parasite diversity and prevalence were higher in the Iberian lynx (43.8%) compared with the others mesocarnivores under study (e.g., the red fox Vulpes vulpes and the Egyptian mongoose Herpestes ichneumon). Ancylostomatidae and Toxocara cati were the most prevalent (15.6%) parasites. Obtained results revealed that Iberian lynx role as predator control might have reduced parasite cross-transmission between this felid and mesocarnivores due to their decreasing abundances. Surveillance programs must include regular monitoring of this endangered felid, comprising mesocarnivores, but also domestic/feral and wild cat communities.

Current Status Of the Iberian Lynx (Lynx pardinus) in Eastern Sierra Morena, Southern Spain

2010 ◽  
Vol 6 (3) ◽  
Author(s):  
José María Gil-Sánchez ◽  
Miguel Angel Simón ◽  
Rafael Cadenas ◽  
José Bueno ◽  
Manuel Moral ◽  
...  
Keyword(s):  
Southern Spain ◽  
Current Status ◽  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus ◽  
Sierra Morena

scholarly journals Detection ofFeline Leukemia Virusin the Endangered Iberian Lynx (Lynx Pardinus)

2008 ◽  
Vol 20 (3) ◽  
pp. 381-385 ◽  
Author(s):  
Inés Luaces ◽  
Ana Doménech ◽  
Marino García-Montijano ◽  
Victorio M. Collado ◽  
Celia Sónchez ◽  
...  
Keyword(s):  
Lynx Lynx ◽  
Iberian Lynx ◽  
Lynx Pardinus
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