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Size specific chemoreception and ontogenic responses to food in the brittle star Ophioderma cinerea (Echinodermata: Ophiuroidea)
Caribbean Journal of Science ( IF 0.4 ) Pub Date : 2019-10-01 , DOI: 10.18475/cjos.v49i2.a7
Samuel A. May 1 , Amanda M. Mikalian 1
Affiliation  

Ophioderma cinerea (Müller & Troschel, 1842) is a species of warm water ophiuroid that lives primarily in rocky habitats in the tropical Atlantic. Competition for resources can be high in their habitat. Behavioral observations in aquaria led to a hypothesis that differences in body size may affect feeding strategies, and thus affect survivorship. It is widely accepted that echinoderm ontogenic growth is sigmoidal, with juveniles growing much faster than adults. Yet, it is not understood what affect this has on behavior. Individuals were kept in replicate experimental tanks. After a 3-d starvation period, each individual was exposed to a proteinaceous food stimulus. The animals were observed and a time measurement was taken to determine how long it took the animals to sense the food and to begin moving toward the food during both day and night. Smaller individuals were found to sense food significantly faster than larger ones, while no difference was observed for time-to-motion. Several explanations may support this finding. One of these explanations highlights how the need to compete with larger animals may have selectively adapted ontogenetically more sensitive chemoreceptors in smaller animals.

中文翻译:

脆性星星灰霉病(Echinodermata:Ophiuroidea)的大小特异性化学感受力和对食物的本体反应

灰质Ophioderma cinerea(Müller&Troschel,1842)是一种温水蛇形类鱼类,主要生活在热带大西洋的岩石栖息地。栖息地对资源的竞争可能很高。在水族箱中进行的行为观察得出一个假设,即体型差异可能会影响喂养策略,从而影响生存率。棘皮动物的成瘤生长是乙状结肠,其成年比成年快得多。但是,尚不了解这会对行为产生什么影响。将个体保持在重复的实验罐中。饥饿3天后,每个人都受到蛋白质食物刺激。观察动物并进行时间测量以确定动物在白天和黑夜感知食物并开始向食物移动所需的时间。发现较小的个体感觉食物的速度明显大于较大的个体,而运动时间没有差异。几种解释可能支持这一发现。这些解释之一强调了与大型动物竞争的需求可能如何选择性地适应了较小动物的个体发育上更敏感的化学感受器。
更新日期:2019-10-01
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