INVESTIGADORES
CUSSAC Victor Enrique
artículos
Título:
Presumptive environmental effects on body shape of Aplochiton zebra (Pisces, Galaxiidae) in Northern Patagonian lakes
Autor/es:
LATTUCA, M.E.,; ORTUBAY, S.,; BATTINI, M.A.,; BARRIGA, J.P.; V.E. CUSSAC
Revista:
JOURNAL OF APPLIED ICHTHYOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ICHTHYOLOGIE
Editorial:
Blackwell
Referencias:
Año: 2007 vol. 23 p. 25 - 33
ISSN:
0175-8659
Resumen:
The family Galaxiidae exhibits a marked tendency toward
morphological variation, particularly in characteristics related
to feeding and caudal propulsion. The body shape of Aplochiton
zebra from six Andean water bodies was examined and
related to diet and to environmental characteristics such as
transparency and predation risk. Although adults and larger
juveniles showed no inter-lake dependence in their morphology,
smaller juveniles (SL < 40 mm) did show differences in
eye diameter and dorsal fin length. Aplochiton zebra juveniles
from Lake Puelo, where transparency showed the minimum
value, have the largest eyes; those from Lake Futalaufquen
with high transparency values have the smallest eyes. No clear
relationship to predation risk was established. In Futalaufquen,
Puelo and Rivadavia lakes the relationship between the
principal components for morphology and for diet indicates, at
least in part, that variation in body shape and particularly
traits related to swimming ability could be related to diet.