TITLE:
Internal Water Flows and Particles Abstraction in Daphnia
AUTHORS:
Moshe Gophen
KEYWORDS:
Daphnia, Particle Abstraction, Solid Walls, Internal Flow Rout
JOURNAL NAME:
Open Journal of Ecology,
Vol.12 No.11,
November
22,
2022
ABSTRACT: The operational function of the trunk limbs (thoracic appendages), of Daphnia, P3 and P4, is a long-term disputed definition between “solid walls”, sieving filters. Sieving is unlikely process for routine particle collection, particle capture is not a simple mechanical process and not by sieving alone. Analysis promotion supported by direct observational examination of the in-vivo cinematographic slow-motion film and magnified solid photos of tethered Daphnia by high-speed camera (250 frames per second) resulted in a definite interpretation presented in this paper. The Daphnia’s feeding mechanism achieves particles abstraction not by sieving. The existence of two internal alternate water flow routs was indicated: Lateral and Median. These micro flow structures are suggested as vulnerability reduction.