J. Videler | Semantic Scholar

Straight, forward, unrestrained swimming behaviour, with periodic lateral oscillations of body and tailfin, was described and compared for saithe and mackerel and yields a Froude efficiency close to the maximum value possible, given the observed amplitude increase in the posterior part.

It is described how maximum tail beat frequencies, and hence maximum swimming speeds, are related to temperature and body length, and the slope of the endurance curves steepens with increasing length with the same factor in both species.

The combined findings suggest that eels can modify their body wave to generate wakes that reflect their propulsive mode, which is suited to high manoeuvrability.

This work has compared the kinematics and muscle activity patterns from seven species of fish with different body forms and swimming modes and proposed a model which yields a consistent pattern, with at least three extremes.

The complex social and mating system of S. viride shows much resemblance to that of another Caribbean scarid,Scarus iserti, and seems to reflect the capacity of individuals to flexibly adapt their feeding, mating and life history styles to an unpredictable environment.

Kinematic data suggest that fish make use of the advantages shown by choosing initial and final burst velocities close to predicted optimal values, and the limiting role of rapid glycogen depletion in fast white anaerobic muscle fibres is discussed.

The structure of the wake behind a continuously swimming mullet was analysed qualitatively and quantitatively by applying two-dimensional particle image velocimetry to derive a kinematic explanation of the flow pattern as well as an estimate of the relative contributions of the body and the tail to thrust production.

The bending moment does not travel as a running wave from head to tail like the lateral body curvature does, but behaves as a standing wave, in agreement with myographic data from the literature.