Artacho Paulina, Soto-Gamboa Mauricio, Verdugo Claudio, Nespolo Roberto F
Instituto de Ecología y Evolución, Facultad de Ciencias, Universidad Austral de Chile, Chile.
Comp Biochem Physiol A Mol Integr Physiol. 2007 Aug;147(4):1060-6. doi: 10.1016/j.cbpa.2007.03.017. Epub 2007 Mar 20.
Living organisms are continuously faced with several forms of environmental perturbation, one of the most important being human activity. In this scenario, the role of physiological studies on wildlife has proved to be important given that in vivo physiological variables reflect a great deal how sensitive animals are to acute environmental changes. We studied the haematological parameters in black-necked swans (Cygnus melanocoryphus) at the Ramsar site at the Carlos Anwandter Sanctuary, which were experiencing a drastic population decrease. Through seven months, body mass (body mass corrected by total length) was reduced 30%, which was followed by significant reductions of haemoglobin concentration, haematocrit and red blood cell count. Mean cell volume and mean cell haemoglobin concentration did not change with time, whereas there was a significant increase of the white blood cells and heterophile / lymphocyte ratio. Our results, together with the published evidence, suggests that the proximal factors associated with the mass mortality and emigration of the black - necked swan population at the "Carlos Anwandter Sanctuary" was a drastic nutritional deficiency, and the potentially toxic effects of iron pollution in the waters of the Ramsar site.
生物有机体不断面临多种形式的环境干扰，其中最重要的一种就是人类活动。在这种情况下，野生动物生理学研究的作用已被证明是重要的，因为体内生理变量在很大程度上反映了动物对急性环境变化的敏感程度。我们研究了位于卡洛斯·安万德特保护区拉姆萨尔湿地的黑颈天鹅（Cygnus melanocoryphus）的血液学参数，该湿地的黑颈天鹅数量正在急剧减少。在七个月的时间里，体重（根据体长校正后的体重）下降了30%，随后血红蛋白浓度、红细胞压积和红细胞计数显著降低。平均细胞体积和平均细胞血红蛋白浓度没有随时间变化，而白细胞和嗜异性粒细胞/淋巴细胞比率显著增加。我们的研究结果以及已发表的证据表明，与“卡洛斯·安万德特保护区”黑颈天鹅种群大量死亡和迁徙相关的近端因素是严重的营养缺乏，以及拉姆萨尔湿地水域中铁污染的潜在毒性影响。
