✦ LIBER ✦

Laboratory observations on the vertical distribution of a tropical pelagic flatworm (Mesostomasp.) in relation to satiation

✍ Scribed by Luc Meester; Henri J. Dumont

Publisher: Springer
Year: 1990
Tongue: English
Weight: 248 KB
Volume: 198
Category: Article
ISSN: 1573-5141
DOI: 10.1007/bf00048626

No coin nor oath required. For personal study only.

✦ Synopsis

Mesostoma sp ., isolated from different lakes in Brazil, was taken to the laboratory and fed Moina sp .. The vertical position of satiated and non-satiated individuals was monitored in 25 cm high columns exposed to natural sunlight . Phototactic responses were studied under standardised experimental conditions .

Satiated individuals resided nearer to the bottom than non-satiated Mesostoma . Non-satiated individuals showed an irregular vertical distribution due to swimming behaviour, whereas satiated animals remained stationary .

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✍ P. V. Bhavanarayana 📂 Article 📅 1974 🏛 Springer 🌐 English ⚖ 348 KB

A study on the vertical distribution of pelagic tunicates in relation to the water masses in the western part of the Bay of Bengal is made . Their depth distribution has clearly pointed out that while some pelagic tunicates are primarily associated with water conditions similar to those of the North