Ultrasonic Tracking of Homing Cutthroat Trout (Salmo clarki) in Yellowstone Lake

1970 ◽  
Vol 27 (4) ◽  
pp. 715-730 ◽  
Author(s):  
James D. McCleave ◽  
Ross M. Horrall
Keyword(s):  
Cutthroat Trout ◽  
Open Water ◽  
Consistent Pattern ◽  
The Other ◽  
Yellowstone Lake ◽  
True Navigation ◽  
Ultrasonic Tracking ◽  
Spawning Tributaries ◽  
Salmo Clarki ◽  
Water Speed

Displacement of 42 mature cutthroat trout (Salmo clarki) from their spawning tributaries to the open water of Yellowstone Lake in the summers of 1966 and 1968 and following them ultrasonically up to 13.5 hr and 11.8 km indicated that those that homed used a compass mechanism rather than search or true navigation to find shore and then followed the shoreline to the home stream. Vision was unnecessary for homing. For many of the fish whose movements showed no consistent pattern, the transmitters failed prematurely.Of 29 nonanesthetized trout tracked from a point northwest of their home streams, six moved generally eastward to shallow water, turned south, and followed the shoreline toward the home streams, three being followed all the way home. Six moved generally south or southeast and progressed toward their home streams entirely in open water, one being followed home. Three moved inappropriately for homing but were less than 2 km from the release point when tracking was ended. Fourteen moved randomly or did not move enough or were not tracked long enough to establish a pattern.Of five anesthetized-blinded trout, two moved eastward and then south along the shoreline, one moved south in open water, and the other two did not show a consistent pattern. Of four anesthetized-control trout, two moved eastward and then south along shore, one being followed home; one moved inappropriately and the other did not establish a pattern.Of four nonanesthetized trout tracked from a point southwest of their home stream, three moved east and then north along shore toward the home stream, one being followed home; the fourth moved north in open water.Current directions may have influenced the initial orientations.Swimming speeds ranged from 0.0 to 46.2 cm sec−1 in open water and from 8.5 to 82.3 cm sec−1 along shore. Average along-shore speed (36.6 cm sec−1) was greater than average open-water speed (22.9 cm sec−1). Blinded trout swam at about the same speeds (average 22.6 cm sec−1) as control trout (average 27.0 cm sec−1) and nonanesthetized trout (average 23.3 cm sec−1).

scholarly journals Movements and Homing of Cutthroat Trout (Salmo clarki) from Open-Water Areas of Yellowstone Lake

1969 ◽  
Vol 26 (5) ◽  
pp. 1243-1261 ◽  
Author(s):  
Lawrence A. Jahn
Keyword(s):  
Cutthroat Trout ◽  
Open Water ◽  
East Side ◽  
Control Groups ◽  
The West ◽  
Yellowstone Lake ◽  
Males And Females ◽  
And Control ◽  
Spawning Tributaries ◽  
Salmo Clarki

Cutthroat trout (Salmo clarki) showed in-season homing after displacement from their spawning tributaries to Yellowstone Lake during June–August 1966 and 1967. Of 300 nonanesthetized trout tagged and displaced from Clear and Cub creeks to three release points (0.5–22.0 km) in the lake and to the mouth of Clear Creek, 38.3% homed, 10.0% strayed, 2.7% were caught by anglers, and the remainder were unaccounted for. Anosmic (olfactory chambers plugged) and blind-anosmic fish homed in significantly lower percentages than nonanesthetized and control groups. Fish released just outside the mouth of the homestream had the shortest average homing time, but the average homing time for fish displaced 22.0 km from the homestream was shorter than for those displaced 5.0 km away. Homing percentages for trout tagged after being tracked individually in the open lake were similar to those for trout in the group tagging experiments, but the former had longer average homing times than the latter.The directions of orientation of fish tracked in open water were generally toward the homestream, the directions usually coinciding with those of the sun azimuth. However, fish taken from the east side of the lake went west-northwest when tracked late in the afternoon and fish taken from the west side of the lake went east-southeast when tracked in the morning, these directions being away from those of the homestreams. Orientation was affected by current. Mean directions for males and females were generally not significantly different. Average swimming speeds and vector lengths for males and females were about the same. Immature cutthroat trout were trained to use a light source as a reference point for orientation.

scholarly journals Homing and Orientation of Cutthroat Trout (Salmo clarki) in Yellowstone Lake, with Special Reference to Olfaction and Vision

1967 ◽  
Vol 24 (10) ◽  
pp. 2011-2044 ◽  
Author(s):  
James D. McCleave
Keyword(s):  
Cutthroat Trout ◽  
Open Water ◽  
Yellowstone Lake ◽  
Water Point ◽  
Homing Performance ◽  
Olfactory Stimuli ◽  
One Year ◽  
Spawning Tributaries ◽  
Visual Clues ◽  
Salmo Clarki

In-season homing was exhibited by mature cutthroat trout (Salmo clarki) displaced from spawning tributaries to Yellowstone Lake during late May to early August 1964, 1965, and 1966. Of 1908 trout tagged and displaced from Clear and Cub creeks to three release points in the lake (1.55–7.95 km) and to the mouths of the streams, 614 (32.2%) homed, 119 (6.2%) strayed, and 28 (1.5%) were captured by anglers. Only slight differences in homing performance from various release points occurred, but there were differences among years and between streams. Adjusted mean homing times from the various release points ranged from 16 hr to 155 hr, with an inverse relation between homing times and the distance to the release point apparent in one year. Blockage of the olfactory or visual sense did not affect the per cent of trout homing or straying. However, visual clues did increase the speed of homing, since homing times for blinded trout were much longer than for olfactory-occluded, control (anesthetized only), or non-anesthetized trout. A compass-type orientation occurred which was apparently not in response to visual or olfactory stimuli. A general east-northeastward (Clear and Pelican Creek trout) or northward (Cub Creek trout) orientation was exhibited by blind, anosmic, control, and non-anesthetized trout that were float-tracked from an open-water point. Blind and anosmic trout oriented as well as control trout. The directions of orientation were not in the directions of the home-streams, and orientation was not at a constant angle to the current directions or the sun azimuths.

Open-Water Movements of the Cutthroat Trout (Salmo clarki) in Yellowstone Lake After Displacement from Spawning Streams

1966 ◽  
Vol 23 (10) ◽  
pp. 1475-1485 ◽  
Author(s):  
Lawrence A. Jahn
Keyword(s):  
Cutthroat Trout ◽  
Open Water ◽  
Surface Currents ◽  
The Sun ◽  
Release Point ◽  
Yellowstone Lake ◽  
Random Movement ◽  
Directional Preference ◽  
Salmo Clarki ◽  
Spawning Streams

Cutthroat trout were taken from their spawning streams (June–August 1964 and 1965). A Styrofoam float was attached and fish were tracked from two release points. They moved generally shoreward (eastward). Of 120 fish tracked when the sun was visible, 68% went toward shore, 19% went away from shore, 4% showed random movement, and 8% were lost. Of 20 fish released when the sun was obscured, 30% went toward shore, 30% went away from shore, 30% showed random movement, and 10% were lost. Movement toward the eastern shoreline was less pronounced for fish liberated at a mid-lake release point. No directional preference was shown with respect to surface currents. There was no evidence that specific landmarks were used for orientation, but the sun may have served as a reference point since fish traveled farther and showed a stronger shoreward tendency on sunny days.

scholarly journals Diphyllobothrium cordiceps: A Tapeworm Problem in Yellowstone Lake Fishes New Investigations into the Life Cycle

1979 ◽  
Vol 3 ◽  
pp. 97-107
Author(s):  
Newton Kingston ◽  
Kenneth Diem ◽  
Douglas Mitchum
Keyword(s):  
Brook Trout ◽  
Salmo Trutta ◽  
Cutthroat Trout ◽  
Rocky Mountain ◽  
Mountain Area ◽  
Yellowstone Lake ◽  
Northern Rocky Mountains ◽  
Brown Trout Salmo Trutta ◽  
Salmo Clarki ◽  
Elk Lake

Diphyllobothrium cordiceps (Leidy, 1872) has been known from Yellowstone Lake fishes since 1872. Leidy described and named the species Dibothrium cordiceps from poorly preserved larval (plerocercoid) material collected from native trout, Salmo mykiss (= Salmo clarki) by members of the Hayden Expedition. The larval tapeworm has been reported only from cutthroat trout, Salmo clarki, brown trout, Salmo trutta, brook trout, Salvelinus fontinalis, and grayling, Thymallus arcticus, chiefly from Yellowstone Lake and adjacent waters in the northern Rocky Mountains. Simms and Shaw (1939), found cordiceps outside the Rocky Mountain area in brook trout from Elk Lake, western Deschutes County, Oregon.

scholarly journals Further Studies on Diphyllobothrium cordiceps in Yellowstone Lake

1980 ◽  
Vol 4 ◽  
pp. 116-118
Author(s):  
N. Kingston ◽  
D. Mitchum ◽  
K. Diem
Keyword(s):  
Life Cycle ◽  
Cutthroat Trout ◽  
Natural Host ◽  
Yellowstone Lake ◽  
Thymallus Arcticus ◽  
Salmo Clarki

The California gull Larus californicus, has been reported as a host for Diphyllobothrium cordiceps from cutthroat trout, Salmo clarki, (Post, 1971) . A comparison of development and of morphological forms of D. cordiceps in young gulls and hamsters which had previously been proven to be susceptible to infection was considered desirable. Previous experimental exposures of cutthroat trout and grayling, Thymallus arcticus, to plerocercoids naturally infected from cutthroat trout had given mixed results with transfer of plerocercoids from cutthroat to cutthroat but not from cutthroat to grayling (Kingston et al., 1980) though grayling have been cited as a natural host for the tapeworm (Post, 1971). Work in 1980 was directed towards the elucidation of these aspects of the life cycle of D. cordiceps.

Introgressive Hybridization in Populations of Paiute Cutthroat Trout (Salmo clarki seleniris)

1981 ◽  
Vol 38 (8) ◽  
pp. 939-951 ◽  
Author(s):  
Craig A. Busack ◽  
G. A. E. Gall
Keyword(s):  
Population Structure ◽  
Rainbow Trout ◽  
Introgressive Hybridization ◽  
Cutthroat Trout ◽  
The Other ◽  
Salmo Gairdneri ◽  
Electrophoretic Data ◽  
The Difference ◽  
Salmo Clarki ◽  
Two Populations

Two populations of Paiute cutthroat trout (Salmo clarki seleniris) were compared meristically and electrophoretically with Lahontan cutthroat (S. c. henshawi) and rainbow trout (S. gairdneri) to elucidate population structure and verify the occurrence of introgressive hybridization. In Silver King Creek, both meristic and electrophoretic evidence indicated two populations were present, one appearing to be pure Paiute cutthroat, the other Paiute cutthroat introgressed with rainbow trout. Lahontan cutthroat introgression was a possibility in Silver King Creek but could not be evaluated because of the strong meristic and electrophoretic similarity of Paiute and Lahontan cutthroat. The other Paiute population, Cottonwood Creek, meristically appeared to be pure Paiute cutthroat but electrophoretic data indicated it was introgressed with rainbow trout. The existence of the two Silver King Creek populations indicated introgression was incomplete in that stream; introgression appeared to be complete in Cottonwood Creek. The meristic similarity of Cottonwood Creek trout to pure Paiute cutthroat was probably a result of strong selection by management agencies for a Paiute cutthroat phenotype. Electrophoresis was more discriminating than meristic analysis in this study in detecting introgression. Electrophoresis also allowed more detailed analysis of population structure than meristics because of the difference in complexity of the genetic systems analyzed by the two techniques. However, the application of both techniques contributed greatly to our understanding of introgression in the Paiute cutthroat and demonstrated the complementarity of the two approaches.Key words: Salmo clarki, Salmo gairdneri, Paiute cutthroat, Lahontan cutthroat, meristics, electrophoresis, introgression, hybridization, gametic disequilibrium, principal components

Activity Localization in Coastal Cutthroat Trout (Salmo clarki clarki) in a Small Bog Lake

1974 ◽  
Vol 31 (7) ◽  
pp. 1246-1249 ◽  
Author(s):  
B. G. Shepherd
Keyword(s):  
Cutthroat Trout ◽  
Focal Points ◽  
Mark Recapture ◽  
Coastal Cutthroat Trout ◽  
Ultrasonic Tracking ◽  
Salmo Clarki

Skindiving observations, ultrasonic tracking, and mark–recapture techniques indicated that coastal cutthroat trout (Salmo clarki clarki) in a small coastal bog lake have, but do not defend, fixed focal points of activity.

EFFECT OF VARIOUS HORMONES ON THE KIDNEY RESPIRATION RATES IN THE CUTTHROAT TROUT (SALMO CLARKI CLARKI)

1960 ◽  
Vol XXXIII (III) ◽  
pp. 428-436 ◽  
Author(s):  
W. N. Holmes
Keyword(s):  
Single Dose ◽  
Respiration Rate ◽  
Cutthroat Trout ◽  
Adaptive Mechanism ◽  
Respiration Rates ◽  
Salmo Clarki

ABSTRACT Relatively large doses of vasopressin administered intraperitoneally to the trout significantly enhanced the kidney respiration rate. In contrast to vasopressin a single dose of oxytocin depressed the kidney Qo2 value. This depression continued throughout the observed 24 hour period after injection. Cortisol enhanced the kidney Qo2 values significantly and to a greater extent than vasopressin. These results are discussed in relation to possible adaptive mechanism in euryhaline species of teleosts.

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