Effects of different swimming race constraints on turning movements

The aim of this study was to investigate the effects of different swimming race constraints on the evolution of turn parameters. One hundred and fifty-eight national and regional level 200-m (meters) male swimming performances were video-analyzed using the individualized-distance model in the Open Comunidad de Madrid tournament. Turn (p < .001, ES = 0.36) and underwater distances (p < .001, ES = 0.38) as well as turn velocity (p < .001, ES = 0.69) significantly dropped throughout the race, although stroke velocity and underwater velocity were maintained in the last lap of the race (p > .05). Higher expertise swimmers obtained faster average velocities and longer distances in all the turn phases (p < .001, ES = 0.59), except the approach distance. In addition, national level swimmers showed the ability to maintain most of the turn parameters throughout the race, which assisted them in improving average velocity at the end of races. Therefore, the variations in the turning movements of a swimming race were expertise-related and focused on optimizing average velocity. Turning skills should be included in the swimming race action plan.

Water chemistry, and body temperature, swimming depth and stomach contents of Arctic char (Salvelinus alpinus) in inner Frobisher Bay, Canada

The influence of salinity, temperature and prey availability on the marine migration of anadromous fishes was determined by describing the movements, habitat use and feeding behaviours of Arctic char (Salvelinus alpinus). The objectives were to determine whether char are restricted to the upper water column of the inter-/subtidal zones due to warmer temperatures. Twenty-seven char were tracked with acoustic temperature/pressure (depth) transmitters from June to September, 2008/2009, in inner Frobisher Bay, Canada. Most detections were in surface waters (0-3 m). Inter-/subtidal movements and consecutive repetitive dives (maximum 52.8 m) resulted in extreme body temperature shifts (-0.2-18.1 °C). Approximately half of intertidal and subtidal detections were between 9-13 °C and 1-3 °C, respectively. Stomach contents and deep diving suggested feeding in both inter-/subtidal zones. We suggest that char tolerate cold water at depth to capture prey in the subtidal zone, then seek warmer water to enhance feeding/digestion physiology.

Data compilation of marine pelagic organism biomasses, swimming velocities, clearance and respiration rates

Jellyfishes have functionally replaced several overexploited commercial stocks of planktivorous fishes. This is paradoxical, because they use a primitive prey capture mechanism requiring direct contact with the prey, whereas fishes use more efficient visual detection. We have compiled published data to show that, in spite of their primitive life-style, jellyfishes exhibit similar instantaneous prey clearance and respiration rates as their fish competitors and similar potential for growth and reproduction. To achieve this production, they have evolved large, water-laden bodies that increase prey contact rates. Although larger bodies are less efficient for swimming, optimization analysis reveals that large collectors are advantageous if they move through the water sufficiently slowly.

Empirical psychology; or, The human mind as given in consciousness. For the use of colleges and academies.

Mode of access: Internet.

Hearings on service academies' honor code before the Military Personnel Subcommittee of Armed Services, House of Representatives, Ninety-fifth Congress, first and second session, including reports by the service academies on the Borman Commission study, October 5, 6, 1977, August 1, 1978.

Mode of access: Internet.

A compendium of natural philosophy: adapted to the use of the general reader, and of schools and academies.

Mode of access: Internet.

The turbidity of public swimming pool waters /

Based on the authors' thesis, University of Illinois, Urbana.

Original ancedotes of Frederick the Great, king of Prussia, and of his family, his court, his ministers, his academies, and his literary friends.

Mode of access: Internet.

A practical grammar of the English language, synthetic and analytic : adapted to the wants of public schools, academies, and private learners /

Mode of access: Internet.

A system of English grammar; constructed upon the basis of Murray's grammar, and adapted to the use of schools, academies, and private learners.

Mode of access: Internet.

A grammar of the English language; explained according to the principles of truth and common sense, and adapted to the capacities of all who think. Designed for the use of schools, academies, and private learners.

Mode of access: Internet.

A grammar of the English language : for the use of schools and academies. With copius parsing exercises. /

Includes bibliographical references.

The principles of English grammar : comprising the substance of the most approved English grammars extant, with copious exercises in parsing and syntax ; For the use of academies and common schools ; A new edition, revised and corrected ; with an appendix of various and useful matter /

Mode of access: Internet.