Browsing by Subject "Endangered species"

Now showing 1 - 4 of 4
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    Distribución y estado de conservación del fartet, Aphanius iberus (Valenciennes, 1846), en la Región de Murcia (S.E. de la Península Ibérica). Establecimiento de grupos poblacionales operativos
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 2001) Torralva Forero, María del Mar; Oliva Paterna, Francisco José; Andreu Soler, Asunción; García Mellado, A.; Miñano, Pedro A.; Cardozo, V.; García-Alonso, J.; Fernández-Delgado, C.; Facultad de Biología
    Aphanius iberus (=Lebias ibera) is one of the most endangered Iberian vertebrates. It is an endemicfish and its drastic regression for the last two decades has involved the cataloguing of the species into theall national and international Red Listes. Because the area of this study is probably the area where thehabitat ́s species is most threatened, so the increment in conservation’s efforts on this species is absolutly necessary to secure its perpetuation. As a first step to develop a Recovery Plan for the species in the Murcian region, we have studied its distribution and assessed its conservation status of each locality inwhich it occurs. For that purpose, we reviewed historical references of the species and sampled allpotential sites identified on 1:25000 scale maps using different sampling gears: trawls, fyke nets, minnowtraps, hand nets and small bag seines.A.iberusoccurred in 40 out of 266 localities visited, 39 localities (9 new records) were included in theMar Menor coastal lagoon. We also found a new population for the species in the Chicamo Stream(30SXH749368), an isolated population outside of the distribution range known for the species in the Murcian Region. In the study area the regression of A. iberus is clear and coincides with the observed in other areas. Finally, we establish 6 Operational Population Groups(OPGs) as the management units to preserve the species in the Murcian region
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    Survey of husbandry practices for bovidae in zoos: the importance of parasite management for reintroduction programmes
    (Wiley. British Veterinary Association, 2019-03-02) Moreno Mañas, Eulalia; Ruiz de Ybáñez Carnero, María del Rocío; Gilbert, Tania; Ortiz Sánchez, Juana; Espeso, Gerardo; Benzal, Jesús; Ibáñez, Belén; Valera Hernández, Francisco; Gonzálvez Juan, Moisés; Sanidad Animal
    Animals from zoological institutions may be used for reintroductions. These individuals are considered healthy, but they are not necessarily free of parasites, despite the minimum husbandry standards required of zoological institutions as described in the European Association of Zoos and Aquaria guidelines. In this sense, parasitism has been identified as the cause of failure, or has added difficulties, in some reintroduction programmes. Here the authors attempt to summarise the risk of parasitism to animals originating from zoological institutions by analysing a questionnaire about parasite prevalence, sampling methods, treatment and control in three ungulates in European zoos. Completed questionnaires were received from 38 institutions (58.5 per cent response rate). Most of the responding institutions (97 per cent) detected the eggs of endoparasites in faeces, but only one reported ectoparasites. Most institutions followed a similar preventive schedule, with ivermectin as the preferred prophylactic treatment for parasites, commonly administered in food every six months. The frequent use of concentrating flotation techniques as the sole method to evaluate the presence of parasite eggs in faecal samples is not recommended because it fails to detect trematode and lung nematode infections, so it would be better to use flotation techniques together with sedimentation procedures or serological and molecular tests. The results suggest that parasite control in zoological institutions can be complicated, indicating the need to implement a specific management schedule for institutions involved in reintroduction projects.
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    The Vega Alta of Segura River (Southeast of Spain): A Wetland of International Importance
    (MDPI, 2021-03-12) Ballesteros Pelegrín, Gustavo; Ibarra-Marinas, Daniel; García-Marín, Ramón; Geografía
    The Ramsar Convention is an intergovernmental treaty for the conservation and wise use of wetlands, which establishes nine criteria related to natural values and a cultural one that wetlands must meet to be included in the list of wetlands of international importance. We aim to evaluate if the wetlands of the Vega Alta of the Segura River (southeast of Spain) meet the requirements to fulfil this agreement. Thanks to meticulous fieldwork and a bibliographic review related to the stated objective, we collected information on the existing environmental and cultural values. The results show that this set of wetlands is home to 11 species of threatened vertebrates in Spain, two priority habitats in the European Union, as well as cultural values related to their origin, conservation, and ecological functioning. Likewise, in the area there are archaeological sites, traditional uses of water associated with the cultivation of rice, and religious manifestations. Effective wetland inventories and rigorous analyzes of their ecological and environmental characteristics, as well as their socioeconomic functions, need to be carried out in order to improve their management and protection.This wetland certainly meets three criteria to be included in the Ramsar Convention list of wetlands.
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    Transferencia nuclear de células somáticas interespecie en félidos salvajes: Una revisión sistemática y metaanálisis
    (Facultad de Veterinaria y el Servicio de Publicaciones de la Universidad de Murcia, 2023) Hernández Navas, Alicia; González Plaza, Alejandro; Cuello Medina, Cristina
    El objetivo de este trabajo fue realizar una revisión sistemática sobre la transferencia nuclear de células so-máticas de félidos salvajes utilizando ovocitos maduros de gato doméstico (Felis catus). Además, se realizaron dos metaanálisis con el programa Comprehensive Meta-Analysis V4 para evaluar el efecto de la transferencia nuclear de células somáticas interespecie (TNCSi) en la división embrionaria y formación de blastocisto en comparación con la técnica intraespecie con células somáticas y ovocitos de gato (TNCSg-g). El metaanálisis se realizó con un modelo aleatorio y el tamaño del efecto se determinó mediante el riesgo relativo (RR). En la revisión sistemática se seleccionaron 16 artículos científicos de un total de 248 y 3230 referencias inicia-les en PubMed y ScienceDirect, respectivamente. Los artículos publicaban tasas de división embrionaria del 27.5% al 96.7% y una tasa máxima de formación de blastocisto del 41.5%. Solo 2 de los 8 artículos obtuvieron descendencia viva, con una eficiencia del 1% aproximadamente sobre el total de embriones transferidos. El riesgo de sesgo de los 10 artículos seleccionados para el metaanálisis fue bajo. No se encontraron diferencias significativas (p>0.05) en la división embrionaria entre la TNCSi y la TNCSg-g. Sin embargo, se observó una menor (p=0.016; RR=0.4) probabilidad de formación de blastocistos en el grupo experimental de TNCSi en comparación con la TNCSg-g. En conclusión, la bibliografía sobre TNCSi en félidos salvajes es escasa y es-tudia especies muy distintas, lo que dificulta los metaanálisis. Aunque la división embrionaria hasta el estadio de 2-4 células es similar en la TNCSi y la TNCSg-g, la formación de blastocisto es menor cuando la célula somática es de una especie de félido distinta al gato