Blasina Gabriela, Molina Juan, Lopez Cazorla Andrea, Díaz de Astarloa Juan
Laboratorio de Vertebrados, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
Laboratorio de Vertebrados, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
C R Biol. 2016 Nov-Dec;339(11-12):498-506. doi: 10.1016/j.crvi.2016.07.003. Epub 2016 Aug 23.
This study explores the relationship between ecomorphology and trophic segregation in four closely related sympatric fish species (Teleostei, Sciaenidae) that are known to differ in their trophic habits. Only adult specimens were analyzed: 103 Cynoscion guatucupa, 77 Pogonias cromis, 61 Micropogonias furnieri, and 48 Menticirrhus americanus. The four species presented divergent ecomorphological traits related to swimming agility, prey spotting and capture, and the potential size of prey they were able to swallow. Results suggest that these sciaenid species can partition the food resources, even though they completely overlap in space. Differences in their ecomorphological traits appear to correlate closely with the diet and consequently could explain the trophic differentiation observed. Arguably, these ecomorphological differences play a significant role in the coexistence of the adults of these sympatric fish species.
本研究探讨了四种同域分布的近缘鱼类（硬骨鱼纲，石首鱼科）的生态形态与营养分化之间的关系，已知这四种鱼在食性上存在差异。仅对成年标本进行了分析：103条瓜头犬牙石首鱼、77条大口牛脂鲤、61条细纹狮子鱼和48条美洲绒须石首鱼。这四个物种呈现出与游泳敏捷性、猎物发现与捕获以及它们能够吞咽的潜在猎物大小相关的不同生态形态特征。结果表明，这些石首鱼科物种能够划分食物资源，尽管它们在空间上完全重叠。它们生态形态特征的差异似乎与饮食密切相关，因此可以解释所观察到的营养分化。可以说，这些生态形态差异在这些同域分布鱼类成年个体的共存中起着重要作用。
