INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Movement of a South American perch (Percichthys trucha) in a montane Patagonian lake during spawning and pre-spawning periods
Autor/es:
BURIA L.,; WALDE, S.J.,; BATTINI M.,; MACCHI P.J.,; ALONSO M.,; RUZZANTE D.E.,; CUSSAC V.E.
Revista:
JOURNAL OF FISH BIOLOGY
Editorial:
Blackwell
Referencias:
Año: 2007 vol. 70 p. 215 - 230
ISSN:
0022-1112
Resumen:
Movement of the South American perch Percichthys trucha (Perciformes: Percichthyidae) was
studied in a set of interconnected mountain lakes in northern Patagonia. Fish were tracked
using attached acoustic tags and a fixed hydrophone array over two seasons, corresponding to
the spawning (1999) and prespawning periods (2000). Percichthys trucha was found to move
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
studied in a set of interconnected mountain lakes in northern Patagonia. Fish were tracked
using attached acoustic tags and a fixed hydrophone array over two seasons, corresponding to
the spawning (1999) and prespawning periods (2000). Percichthys trucha was found to move
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
studied in a set of interconnected mountain lakes in northern Patagonia. Fish were tracked
using attached acoustic tags and a fixed hydrophone array over two seasons, corresponding to
the spawning (1999) and prespawning periods (2000). Percichthys trucha was found to move
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the
behaviour of P. trucha during the breeding season has highlighted the conservation significance
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
of the main locations within the lake system. # 2007 The Authors
throughout the lake system, and to use a small, shallow, connected lake as a principal spawning
area. In addition, detailed behavioural information was obtained for the spawning period. Most
fish spent the initial 2 weeks descending from the littoral zone to depths of 58 m, presumably
while feeding. Fish changed depth slowly, spending several days at each depth, and moving
throughout the lake. A few days prior to the full moon, there was a change in behaviour thought
to be associated with spawning, where the fish moved toward the vegetated littoral areas.
Marked daily behaviour also began at this time, with movement to particular near-shore
locations at dusk, and return to slightly greater depths offshore at or before dawn. Study of the