RESUMO
Anthropogenic habitat modification can indirectly effect reproduction and survival in social species by changing the group structure and social interactions. We assessed the impact of habitat modification on the fitness and life history traits of a cooperative breeder, the Arabian babbler (Argya squamiceps). We collected spatial, reproductive and social data on 572 individuals belonging to 21 social groups over 6 years and combined it with remote sensing to characterize group territories in an arid landscape. In modified resource-rich habitats, groups bred more and had greater productivity, but individuals lived shorter lives than in natural habitats. Habitat modification favoured a faster pace-of-life with lower dispersal and dominance acquisition ages, which might be driven by higher mortality providing opportunities for the dominant breeding positions. Thus, habitat modification might indirectly impact fitness through changes in social structures. This study shows that trade-offs in novel anthropogenic opportunities might offset survival costs by increased productivity.
Assuntos
Ecossistema , Características de História de Vida , Animais , Masculino , Feminino , Reprodução , Passeriformes/fisiologia , Aptidão Genética , Efeitos AntropogênicosRESUMO
The term "carcinoma erysipeloides" (CE) designates an uncommon form of cutaneous metastasis. CE is most often associated with carcinoma of the breast. However, there have been reports of CE from carcinoma of the uterus, prostate, lung, ovary, stomach, tonsils, thyroid, pancreas, rectum, parotid glands and melanoma. To our knowledge, CE of laryngeal origin has not been previously reported. We describe a patient diagnosed with human immunodeficiency virus and hepatitis C virus coinfection who developed a supraglottic laryngeal squamous cell carcinoma and erythematous cutaneous lesions. A skin biopsy demonstrated invasion of dilated dermal lymphatics by clusters of atypical squamous cells with polymorphic nuclei and extensive infiltration of the dermis by tumor cells. The histology of the metastatic cells was similar to that of the laryngeal carcinoma.
Assuntos
Carcinoma de Células Escamosas/secundário , Neoplasias Laríngeas/patologia , Neoplasias Cutâneas/secundário , Pele/patologia , Biópsia , Carcinoma de Células Escamosas/complicações , Carcinoma de Células Escamosas/terapia , Coinfecção , Evolução Fatal , Infecções por HIV/complicações , Infecções por HIV/tratamento farmacológico , Hepatite C/complicações , Hepatite C/tratamento farmacológico , Humanos , Neoplasias Laríngeas/complicações , Neoplasias Laríngeas/terapia , Vasos Linfáticos/patologia , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Neoplasias Cutâneas/complicações , Neoplasias Cutâneas/terapia , Resultado do TratamentoRESUMO
Se presentan dos casos de tumoraciones benignas del cordón espermático que se manifestaron con dolor y aumento de volumen de la bolsa escrotal. Motivan esta comunicación la rareza de la entidad y el diagnóstico diferencial que se requiere. Se hacen una serie de consideraciones de orden clínico, diagnóstico y terapéutico.