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Leucistic Southern Elephant Seal At Marion Island

机译：马里恩岛的Leucistic南部象海豹

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We observed a light coloured female southern elephant seal juvenile (Mirounga leonina) twice at Marion Island in August 2008 and confirmed that it was leucistic rather than albinistic. Though there have been a few previous reports of light-coloured southern elephant seals, this is the first confirmed case of leucism in this species. Judged to be 1-year old, perhaps 2-years old at the most, and because we have not observed any leucistic pups at Marion Island during the past 2 years despite an extensive monitoring and tagging program, we think that this animal was born at nearby Prince Edward Island or perhaps further afield at Iles Crozet. We observed a light coloured southern elephant seal at Marion Island on 23 August 2008 at 13:30 GMT+3, at Whale Bird Beach (46°57"17'S, 37°52"3'E) (Fig. 1). The animal was resting next to a normally coloured conspecific of similar size. We approached the seal closely to check for tags (none present) and to photograph and observe it (Fig. 2). The animals were photographed in the same frame for comparison and exposures were varied to prevent exaggerating the light individual's colour due to overexposure (Fig. 2). The digital photographs were not post-processed in any way. Both animals were dry.
机译：我们在2008年8月于马里恩岛（Marion Island）两次观察到一只浅色雌性南象海豹少年（Mirounga leonina），并证实这是白痴而非白化病。尽管以前有一些关于浅色南部象海豹的报道，但这是该物种中首例确诊的白血病。判断是1岁，最多可能是2岁，并且由于过去两年尽管进行了广泛的监控和标记程序，我们在Marion岛上还没有观察到任何白斑幼崽，所以我们认为这只动物出生于在爱德华王子岛附近，或者在Iles Crozet的更远地方。我们于2008年8月23日格林尼治标准时间+3鲸鱼鸟滩（46°57“ 17'S，37°52” 3'E）在马里恩岛（Marion Island）观察到浅色的南象海豹（图1）。该动物在大小相似的正常着色同种异体旁边休息。我们紧密接近印章以检查标签（不存在）并拍照并观察（图2）。在同一帧中对动物进行拍照以进行比较，并改变曝光量，以防止由于过度曝光而夸大灯光个体的颜色（图2）。数码照片没有以任何方式进行后处理。两只动物都是干的。

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