Mouthpart and foregut ontogeny in phyllosoma larvae of the spiny lobster Jasus edwardsii (Decapoda: Palinuridae)
Mouthpart and foregut ontogeny in phyllosoma larvae of the spiny lobster Jasus edwardsii (Decapoda: Palinuridae)
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刺龙虾叶状体幼虫的口器和前肠个体发育（十足目：Palinuridae）
DOI：
10.1071/mf01105
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发表时间：
2001
影响因子：
1.8
通讯作者：
A. Ritar
中科院分区：
文献类型：
--
作者：
D. Johnston;A. Ritar
口部和前肠结构表明，叶瘤茉莉摄食柔软的肉质食物，如凝胶状浮游动物。在幼虫发育过程中，口器形态变化不大，这表明摄食能力和外部咀嚼能力从早期就发育良好。然而，密度和复杂性的setation和鲁棒性的个人口器随着年龄的增长，这表明更大的能力，在发展过程中摄取更大的猎物。前肠由单个腔室组成，具有许多发育良好的沟、脊和刚毛，但缺乏胃磨。前肠的主要作用是混合、分类和过滤由口器预先研磨的颗粒。根据压滤机和主刷的发展，叶状体被分为早期（I-III期）、中期（IV-V期）和晚期（VI-X期）。增加鲁棒性的setation和复杂的前肠表明，猎物的质地变得更加肌肉发达（纤维）与幼虫的发展。这里提出的结果表明，早期phyllosoma将受益于饮食包括软凝胶的项目，而后期phyllosomas更好地准备处理较大的，肉质的猎物。结构特征随年龄的变化也应该作为制定配方饮食的指导。
Mouthpart and foregut structure indicates that Jasus edwardsii phyllosomas ingest soft fleshy foods such as gelatinous zooplankton. Mouthpart morphology changes little during larval development, indicating that ingestive capabilities and external mastication are well developed from an early age. However, the density and complexity of setation and robustness of individual mouthparts increases with age, suggesting a greater capacity to ingest larger prey during development. The foregut consists of a single chamber with a number of well-developed grooves, ridges, and setae but lacking a gastric mill. The primary role of the foregut is mixing, sorting, and filtering particles, preground by the mouthparts. Phyllosomas have been divided into early (stage I-III), mid (IV-V), and late (VI-X) stages based on the development of the filter press and main brushes. Increasing robustness of setation and complexity of the foregut suggest that the texture of prey becomes more muscular (fibrous) with larval development. The results presented here suggest that early-stage phyllosoma would benefit from a diet comprising soft gelatinous items, whereas late-stage phyllosomas are better prepared to deal with larger, fleshy prey. The changes in structural characteristics with age should also serve as a guide in the development of formulated diets.