Caracterización citológica de hepatopatías en perros y gatos

Diferentes técnicas diagnósticas complementarias se han aplicado durante losúltimos años en medicina veterinaria. Debido a su implementación se han realizado diagnósticosnovedosos en animales, pero aún es necesario determinar sensibilidad y especificidadde las mismas. Para la evaluación de las enfermedades hepáticas se dispone fundamentalmentede técnicas no invasivas, como las pruebas bioquímicas, la ultrasonografía y otras.La realización de biopsias es fundamental en muchos casos para determinar la causa o elpronóstico de las alteraciones encontradas, por lo cual todas estas técnicas deben considerarsecomo parte de un sistema de diagnóstico integrado. Se describen aquí los resultadosde la realización de la técnica de punción con aguja fina guiada por ecografía, aplicada aveintidós pacientes con sintomatología hepática, que concurrieron al Hospital de Clínicas dela Facultad de Ciencias Veterinarias de la UNNE durante el primer semestre del año 2007.Se detallan hallazgos citológicos significativos para la caracterización de diferentes hepatopatíasen perros y gatos

The population biology of the living coelacanth studied over 21 years

Between 1986 and 2009 nine submersible and remote-operated vehicle expeditions were carried out to study the population biology of the coelacanth Latimeria chalumnae in the Comoro Islands, located in the western Indian Ocean. Latimeria live in large overlapping home ranges that can be occupied for as long as 21 years. Most individuals are confined to relatively small home ranges, resting in the same caves during the day. One hundred and forty five coelacanths are individually known, and we estimate the total population size of Grande Comore as approximately 300–400 adult individuals. The local population inhabiting a census area along an 8-km section of coastline remained stable for at least 18 years. Using LASER-assisted observations, we recorded length frequencies between 100 and 200 cm total length and did not encounter smaller-bodied individuals (\100 cm total length). It appears that coelacanth recruitment in the observation areas occur mainly by immigrating adults. We estimate that the mean numbers of deaths and newcomers are 3–4 individuals per year, suggesting that longevity may exceed 100 years. The domestic fishery represents a threat to the long-term survival of coelacanths in the study area. Recent changes in the local fishery include a decrease in the abundance of the un-motorized canoes associated with exploitation of coelacanths and an increase in motorized canoes. Exploitation rates have fallen in recent years, and by 2000, had fallen to lowest ever reported. Finally, future fishery developments are discussed