دانلود مقاله ISI انگلیسی شماره 77255
عنوان فارسی مقاله

جنسیت، استرادیول و حافظه فضایی در یک ذخیره غذایی corvid

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
77255 2015 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Sex, estradiol, and spatial memory in a food-caching corvid
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Hormones and Behavior, Volume 75, September 2015, Pages 45–54

کلمات کلیدی
حافظه فضایی؛ استرادیول - آروماتاز؛ اسکراب جی - ذخیره مواد غذایی
پیش نمایش مقاله
پیش نمایش مقاله جنسیت، استرادیول و حافظه فضایی در یک ذخیره غذایی corvid

چکیده انگلیسی

Estrogens significantly impact spatial memory function in mammalian species. Songbirds express the estrogen synthetic enzyme aromatase at relatively high levels in the hippocampus and there is evidence from zebra finches that estrogens facilitate performance on spatial learning and/or memory tasks. It is unknown, however, whether estrogens influence hippocampal function in songbirds that naturally exhibit memory-intensive behaviors, such as cache recovery observed in many corvid species. To address this question, we examined the impact of estradiol on spatial memory in non-breeding Western scrub-jays, a species that routinely participates in food caching and retrieval in nature and in captivity. We also asked if there were sex differences in performance or responses to estradiol. Utilizing a combination of an aromatase inhibitor, fadrozole, with estradiol implants, we found that while overall cache recovery rates were unaffected by estradiol, several other indices of spatial memory, including searching efficiency and efficiency to retrieve the first item, were impaired in the presence of estradiol. In addition, males and females differed in some performance measures, although these differences appeared to be a consequence of the nature of the task as neither sex consistently out-performed the other. Overall, our data suggest that a sustained estradiol elevation in a food-caching bird impairs some, but not all, aspects of spatial memory on an innate behavioral task, at times in a sex-specific manner.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.