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Titolo:
COMPENSATORY ESCAPE MODE TRADE-OFFS BETWEEN SWIMMING PERFORMANCE AND MANEUVERING BEHAVIOR THROUGH LARVAL ONTOGENY OF THE WOOD FROG, RANA-SYLVATICA
Autore:
BROWN RM; TAYLOR DH;
Indirizzi:
MIAMI UNIV,DEPT ZOOL OXFORD OH 45056
Titolo Testata:
Copeia
fascicolo: 1, , anno: 1995,
pagine: 1 - 7
SICI:
0045-8511(1995):1<1:CEMTBS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANGELFISH PTEROPHYLLUM-EIMEKEI; PREDATOR-PREY INTERACTIONS; INTRASPECIFIC COMPETITION; ANURAN LARVAE; TAIL INJURY; BODY SIZE; TADPOLES; METAMORPHOSIS; LOCOMOTION; RESPONSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
R.M. Brown e D.H. Taylor, "COMPENSATORY ESCAPE MODE TRADE-OFFS BETWEEN SWIMMING PERFORMANCE AND MANEUVERING BEHAVIOR THROUGH LARVAL ONTOGENY OF THE WOOD FROG, RANA-SYLVATICA", Copeia, (1), 1995, pp. 1-7

Abstract

We measured variation in swimming performance (sprint velocity, distance swam) and maneuvering behavior (number of turns per sprint and turn angles) across larval ontogeny of the wood frog Rana sylvatica to determine what ontogenetic variation existed in the relationship betweenthese two classes of escape mode. Wood frog tadpoles exhibited low probabilities of turning out of a previously straight trajectory and didso at shallower angles during the mid-late larval growth periods whenswimming performance was most highly developed (stages 29-37). In contrast, both before and after this period of heavy reliance on locomotor performance (less than or equal to stage 29; greater than or equal to stage 37), tadpoles demonstrated fi significantly greater propensityto engage in turning behavior, and maneuvering occurred at sharper angles from a previous escape trajectory. It was also at these times, atthe very beginning and end of tadpole development when larvae are presumably most susceptible to predators, that we observed the lowest values for swimming performance variables measured in this study. Thus, developmental variation in performance escape tactics may be coupled with a quantitative change in a maneuvering behavior escape mode. The apparent escape mode switch detected in this study suggests that behavioral mechanisms may compensate for decreased locomotor performance in metamorphic larval amphibians which may otherwise be differentially vulnerable to aquatic predators.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 18:37:22