Relative medial and dorsal cortex volume in relation to foraging ecology in congeneric lizards
Relative medial and dorsal cortex volume in relation to foraging ecology in congeneric lizards
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DOI：
10.1159/000006631
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发表时间：
1999-12-01
影响因子：
1.7
通讯作者：
Wilczynski, W
中科院分区：
文献类型：
--
作者：
Day, LB;Crews, D;Wilczynski, W
在许多哺乳动物和鸟类中，寻找分布资源（如配偶、食物和巢穴）的需要与海马的扩大有关。这种相关性被认为是空间能力选择的结果。人们对这种生态需求如何影响非哺乳动物和非鸟类物种知之甚少。在蜥蜴中，假定的海马同源物是背侧皮层（DC）和内侧皮层（MC）。研究了同类雄性蜥蜴觅食生态与腹腹和腹腹大小的关系。我们根据哺乳动物和鸟类的文献预估了Acanthodactylus boskianus的MC和DC比a . scutellatus的MC和DC更大。Acanthodactylus boskianus是一种活跃的觅食动物，捕获成群的、不移动的猎物。我们之前的行为研究表明，在空间任务上，黄斑拟南猿与黄斑拟南猿并无差异，但在视觉识别的逆转上，黄斑拟南猿明显优于黄斑拟南猿，这是另一项依赖于哺乳动物海马的任务。在本研究中，我们发现，相对于端脑体积，主动觅食者的MC和DC更大，而对照区域，侧嗅皮层，在物种之间的大小相似。目前的解剖结果表明，MC和DC的大小与蜥蜴的主动觅食有关，并且与我们之前的行为研究一起表明，在没有证据表明物种空间记忆差异的情况下，这种关系可能发生。版权所有(C) 2000 S. Karger AG，巴塞尔。
The need to locate distributed resources such as mates, food, and nests is correlated with an enlarged hippocampus in many mammalian and avian species. This correlation is believed to be a consequence of selection for spatial ability. Little is known about how such ecological needs affect non-mammalian, non-avian species. In lizards, the putative hippocampal homologues are the dorsal cortex (DC) and medial cortex (MC). We examined the relationship between foraging ecology and the size of the DC and MC in congeneric male lizards. We pre dieted based on the mammalian and avian literature that Acanthodactylus boskianus, an active forager that captures clumped, immobile prey would have a larger MC and DC than A. scutellatus, a sit-and-wait predator, that captures mobile prey. Our previous behavioral studies showed that A. boskianus did not differ from A. scutellatus on a spatial task but that A. boskianus was significantly better at the reversal of a visual discrimination, another task that is hippocampally dependent in mammals. In the current study, we found that, relative to telencephalon volume, the MC and DC were larger in the active forager whereas a control region, the lateral, olfactory, cortex, was similar in size between species. The current anatomical results suggest that MC and DC size is related to active foraging in lizards and, along with our previous behavioral studies, show that it is possible for this relationship to occur in the absence of evidence for species differences in spatial memory. Copyright (C) 2000 S. Karger AG, Basel.