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首页> 外文期刊>Marine biology >Diet of Balaenophilus spp. (Copepoda: Harpacticoida): feeding on keratin at sea?
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Diet of Balaenophilus spp. (Copepoda: Harpacticoida): feeding on keratin at sea?

机译：Balaenophilus spp的饮食。 （Copepoda：Harpacticoida）：在海上以角蛋白为食吗？

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Evidence about the diet and the type of association, commensalistic or parasitic, of species of Balaenophilus is not conclusive. In this study, we addressed these questions based on patterns of microhabitat selection, SEM and immunohistochemistry analyses of gut contents of the two species in the genus, B. unisetus and B. umigamecolus. We also made histo-pathological descriptions of the sites where the latter species occurred. Heavy infections of B. unisetus were found on the baleen plates of 18 out of 20 fin whales, Balaenoptera physalus, captured off the NW coast of Spain. Gut contents were packed as food pellets that were composed mostly of baleen tissue, as indicated by both SEM and immunohistochemistry. Individuals of B. umigamecolus appeared in 43 out of 52 loggerhead sea turtles from the Western Mediterranean. In six turtles analysed in detail, copepods occurred mostly in the hinge region between limb scales and on the skin of the cloacal region; rarely under whitish skin lesions on the neck and hindlimbs. No food pellets could be found in 20 individuals examined, but two of them had pieces of tissue in the mouth that resembled turtle skin. The his-topathologic analysis was also compatible with mild host reaction to the erosion of epidermis produced by B. umigamecolus. The occurrence of Balaenophilus spp. as ectoparasites of phylogenetically unrelated hosts which, however, provide similar keratin-rich habitats, might suggest that the exploitation of this food resource (an ecological novelty among crustaceans) is in the origin of these associations. This hypothesis is further supported by the record of another putative species of Balaenophilus on the skin of sirenians.
机译：关于饮食和Balaenophilus物种的共生关系，共生关系或寄生关系的证据尚无定论。在这项研究中，我们基于微生境选择模式，SEM和B. umigamecolus属两个物种的肠道内容物的免疫组化分析解决了这些问题。我们还对后一种菌种发生的部位进行了组织病理学描述。在西班牙西北海岸捕获的20头长鳍鲸physalus中，有18头鲸的baleen板发现了严重感染B. unisetus。扫描电镜和免疫组织化学均表明，肠内容物被包装成主要由baleen组织组成的食物颗粒。来自地中海西部的52只海龟中有43只出现了B. umigamecolus个体。在详细分析的六只海龟中，co足类动物大多发生在四肢鳞片之间的铰链区域和泄殖腔区域的皮肤上。很少在脖子和后肢发白的皮肤病变下。在检查的20个人中没有发现食物团，但其中两个人的嘴中有一块类似龟皮的组织。组织病理学分析也与温和的宿主反应对黄褐肉芽孢杆菌产生的表皮的侵蚀是相容的。 Balaenophilus spp的发生。由于系统发育上不相关的寄主的外寄生物，但是它们提供了类似的富含角蛋白的栖息地，可能表明对这种食物资源的开发（甲壳类动物中的一种生态新奇）是这些协会的起源。该假说得到了海妖犬皮肤上另一种假定的Balaenophilus物种的记录的进一步支持。

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