The spatial distribution of phenotypes across the environment has important consequences for population biology, community ecology, and evolution. Populations of pumpkinseed sunfish (Centrarchidae: Lepomis gibbosus) have repeatedly diversified between the littoral and pelagic habitats of postglacial lakes, but we know little about the natural history of pumpkinseed in exposed rocky littoral shorelines relative to those in sheltered littoral bays. We addressed three general questions with respect to the pumpkinseed found in exposed littoral shoreline relative to conspecifics from sheltered littoral and pelagic habitats: (1) What phenotype is associated with the exposed littoral shoreline? (2) What is their summer diet? (3) What is the condition of pumpkinseed from exposed littoral shorelines? Reference sheltered littoral and pelagic pumpkinseed were phenotypically and ecologically differentiated in a pattern consistent with several previous studies; pelagic pumpkinseed had deeper bodies, smaller jaws (narrower oral jaw width and shorter premaxilla), and a more terminal mouth, as well as having more zooplankton and less insects in their diet. Pumpkinseed from exposed shoreline habitat had jaw and body shape phenotypes, as well as diets, that were similar to sheltered littoral reference pumpkinseed in some traits while others were more intermediate. We found no evidence that differences between habitats in phenotype or diet translated into differences in body condition at the end of the summer growing season, suggesting that exposed littoral shorelines are unlikely to be an ecological ‘sink’ habitat. This study expands our understanding of the spatial distributions of polyphenic pumpkinseed, and their habitat use in postglacial lakes.

表型在整个环境中的空间分布对种群生物学，社区生态学和进化具有重要意义。南瓜籽翻车鱼的种群（Centrarchidae：Lepomis gibbosus）在冰河后湖的沿海和中上生境之间反复多样化，但相对于庇护的沿海海湾，在裸露的岩石沿海海岸线上南瓜子的自然历史我们知之甚少。我们针对暴露的沿海海岸线中的南瓜籽相对于庇护的沿海和中上层生境的同种异体，解决了三个一般性问题：（1）与暴露的沿海海岸线相关的表型是什么？（2）他们的夏季饮食是什么？（3）沿海裸露的海岸线上的南瓜子状况如何？参考庇护的滨海和中上层南瓜子在表型和生态学上与以前的研究一致。中上层南瓜子的身体较深，下颌较小（口腔下颌宽度较窄，前颌较短），嘴巴更大，饮食中有更多的浮游动物和更少的昆虫。来自裸露的海岸线栖息地的南瓜子具有下巴和身体形状的表型，以及饮食，在某些特征上与庇护的沿海参考南瓜子相似，但有一些性状。我们没有发现证据表明在夏季生长期结束时，表型或饮食上的栖息地之间的差异会转化为身体状况的差异，这表明沿岸裸露的海岸线不太可能是生态上的“下沉”栖息地。这项研究扩大了我们对多酚南瓜籽的空间分布及其在冰川后湖泊中的栖息地利用的理解。以及饮食，在某些特征上类似于带有庇护权的滨海参考南瓜子，而其他特征则更为中等。我们没有发现证据表明在夏季生长期结束时，表型或饮食上的栖息地之间的差异会转化为身体状况的差异，这表明沿岸裸露的海岸线不太可能是生态上的“下沉”栖息地。这项研究扩大了我们对多酚南瓜籽的空间分布及其在冰川后湖泊中的栖息地利用的理解。以及饮食，在某些特征上类似于带有庇护权的滨海参考南瓜子，而其他特征则更为中等。我们没有发现证据表明在夏季生长期结束时，表型或饮食上的栖息地之间的差异会转化为身体状况的差异，这表明沿岸裸露的海岸线不太可能是生态上的“下沉”栖息地。这项研究扩大了我们对多酚南瓜籽的空间分布及其在冰川后湖泊中的栖息地利用的理解。这表明沿海沿海裸露的海岸线不太可能成为生态“沉没”的栖息地。这项研究扩大了我们对多酚南瓜籽的空间分布及其在冰川后湖泊中的栖息地利用的理解。这表明沿海沿海裸露的海岸线不太可能成为生态“沉没”的栖息地。这项研究扩大了我们对多酚南瓜籽的空间分布及其在冰川后湖泊中的栖息地利用的理解。