Life History of Rainbow Trout (Salmo gairdneri) in Batchawana Bay, Eastern Lake Superior

1971 ◽  
Vol 28 (5) ◽  
pp. 771-775 ◽  
Author(s):  
Wen-hwa Kwain
Keyword(s):  
Life History ◽  
Rainbow Trout ◽  
Sexual Maturation ◽  
Lake Superior ◽  
Fork Length ◽  
Apparent Size ◽  
Salmo Gairdneri ◽  
Size Difference ◽  
History Of

The life history of a rainbow trout (Salmo gairdneri) population was inferred from scale readings from the years 1967–70. Of 461 scale samples examined, 58% were from fish spending 2 years in the stream, 38% were 1 year in the stream, and 4% were 3 years in the stream. Three- and four-year-old trout formed the bulk of the spawning population. Fish descending early to the lake were significantly larger at maturity than fish descending later in life. No apparent size difference between sexes was found; fish generally spent 2 years in the lake to reach sexual maturation. In the spawning population, 68% were maiden spawners and 26% were spawning for a second time. A five-time spawner was recorded. The incidence of lamprey marking of rainbow trout was 15% (1969) and 14% (1970). Ninety percent of lamprey-marked trout were larger than 450 mm in fork length and had lived in the lake for 2 or more consecutive years.

scholarly journals Early life history of triploid rainbow trout (Salmo gairdneri Richardson)

Aquaculture ◽  
1988 ◽  
Vol 71 (1-2) ◽  
pp. 107-118 ◽  
Author(s):  
A. Happe ◽  
Edwige Quillet ◽  
B. Chevassus
Keyword(s):  
Life History ◽  
Rainbow Trout ◽  
Early Life ◽  
Early Life History ◽  
Salmo Gairdneri ◽  
History Of

THE LIFE HISTORY OF LESTES CONGENER (ODONATA: ZYGOPTERA) ON THE CANADIAN PRAIRIES

1974 ◽  
Vol 106 (4) ◽  
pp. 367-376 ◽  
Author(s):  
W. W. Sawchyn ◽  
C. Gillott
Keyword(s):  
Life History ◽  
Embryonic Development ◽  
Larval Development ◽  
Sexual Maturation ◽  
Low Temperatures ◽  
Canadian Prairies ◽  
History Of

AbstractLestes congener Hagen overwinters in the egg stage. There is a diapause just before blastokinesis, during which the egg is extremely resistant to low temperatures and desiccation. Post-diapause embryonic development can occur near 0 °C but will not take place until the eggs are wetted as the pond habitat fills in the spring. Hatching does not occur until the temperature exceeds about 5 °C and is highly synchronous. Larval development is rapid and is completed in the field in about 50 days. Emergence of the adults also is synchronous. Sexual maturation requires 3 weeks. Oviposition occurs immediately after copulation while the pair are still in tandem. It takes place only in dry stems of Scirpus. Adaptations of L. congener for life under rigorous prairie conditions are discussed.

scholarly journals THE LIFE-HISTORY OF THE SPINED RUSTIC, BARATHRA CURIALIS, SMITH

1906 ◽  
Vol 38 (12) ◽  
pp. 381-384
Author(s):  
James Fletcher ◽  
Arthur Gibson
Keyword(s):  
Life History ◽  
Nova Scotia ◽  
Lake Superior ◽  
The Body ◽  
Wide Area ◽  
History Of

In the Report of the Entomologist and Botanist to the Dominion Experimental Farms for 1905, at pages 179 and 180, considerable space is given to a discussion of an outbreak of a large noctuid caterpillar, which appeared in considerable numbers in Canada during 1905. Complaints of injury by this insect were received from a wide area, extending from Nova Scotia as far west as Lake Superior. During July many kinds of plants in gardens were attacked by smooth cutworm-like caterpillas, which when small were greenish in colour, having the body divided into two equal areas above and below the spiracles by a wide black stigmatal band.

Abundance and Life History of Mysis relicta in the St. Lawrence Great Lakes

1974 ◽  
Vol 31 (3) ◽  
pp. 319-325 ◽  
Author(s):  
G. F. Carpenter ◽  
E. L. Mansey ◽  
N. H. F. Watson
Keyword(s):  
Life History ◽  
Generation Time ◽  
Lake Superior ◽  
Life Cycles ◽  
Lake Huron ◽  
Summer Period ◽  
Mysis Relicta ◽  
Frequency Distributions ◽  
History Of ◽  
Major Period

In sampling on lakes Ontario, Erie, and Superior during three cruises from spring to fall, and on Lake Huron during eight cruises, Mysis relicta was generally not taken or not abundant in waters less than 25 m in depth. Its abundance appeared to increase with depth at least up to 200 m. Populations appeared to be concentrated in waters 125–200 m deep during summer and more dispersed during spring and fall. Highest numbers were found in Lake Superior, followed by lakes Ontario and Huron. A small localized population was found in the deep eastern part of Lake Erie.Size-frequency distributions from the various cruises on lakes Superior, Huron, and Ontario indicated differences in life cycles of the mysid in the three lakes. In Lake Superior there was one major period of recruitment, from February to July, and the generation time appeared to be 2 yr. In lakes Huron and Ontario recruitment appeared to occur from February to August and to be separated into a winter and a summer period; each of the generations appeared to mature in 18 mo.

Life History of Redside Shiners, Richardsonius balteatus, with Particular Reference to Movements In and Out of Sixteenmile Lake Streams

1963 ◽  
Vol 20 (4) ◽  
pp. 1001-1030 ◽  
Author(s):  
C. C. Lindsey ◽  
T. G. Northcote
Keyword(s):  
Life History ◽  
Fork Length ◽  
Water Levels ◽  
Daily Maximum ◽  
Egg Deposition ◽  
Maximum Water Temperature ◽  
History Of ◽  
Maximum Water ◽  
Richardsonius Balteatus ◽  
Downstream Movement

Movements of shiners through two-way traps on inlet and outlet streams of a small British Columbia lake were studied from 1956 to 1962. The date on which adults first entered the inlet each spring corresponded to the first rise of daily maximum stream temperature above 10 °C. Days on which increased numbers of shiners ascended the inlet were positively associated with days of rising daily maximum water temperature, and were not associated with water levels. Egg deposition occurred both in daylight and darkness. Downstream movement of shiner fry was greatest during periods of turbidity, and occurred largely during darkness. Shiners first spawned at age III or older; some lived to age V or VI. Number of adult shiners over 79 mm fork length was estimated by Petersen marking experiments to be about 13,000 in the 42-acre lake. A large interchange of adults took place in some years between the lake and parts of the watershed upstream; a small interchange occurred downstream. Many shiners entered a stream more than once each year. Many survived to spawn in two or more successive years. Movement into the streams varied markedly in different years and was small compared with the number of adults in the lake. Homing is suggested as a mechanism which determines the proportion of inlet-, outlet-, and lake-spawning in this species.

Vital Statistics of a Population of Great Lakes Rainbow Trout (Salmo gairdneri) Characterized by an Extended Spawning Season

1970 ◽  
Vol 27 (3) ◽  
pp. 613-618 ◽  
Author(s):  
Douglas P. Dodge ◽  
Hugh R. MacCrimmon
Keyword(s):  
Life History ◽  
Rainbow Trout ◽  
Great Lakes ◽  
Sea Lamprey ◽  
Vital Statistics ◽  
Spawning Season ◽  
Lake Huron ◽  
Salmo Gairdneri ◽  
Class Structure ◽  
Adult Fish

Adult fish moved into Bothwell's Creek, Lake Huron, between October 29 and May 3. Run A (October 29–February 15) was composed of 640 fish, run B (February 16–May 3) of 610 fish. Run A spawned between December 29 and February 14 and left the river. Run B spawned between February 20 and April 30. Total lengths of males ranged from 31 to 80 cm, females from 21 to 90 cm. Fourteen categories of life history were identified within the population of which 99% had become smolts after 2 years of stream life. Fish of age 5 were dominant. Differences in age class structure and size of fish occurred between runs A and B. Sea lamprey scars were evident on 8.6% of fish, all over 46 cm in total length.

Life History of Juvenile Ocean-type Chinook Salmon (Oncorhynchus tshawytscha) in the Situk River, Alaska

1992 ◽  
Vol 49 (12) ◽  
pp. 2621-2629 ◽  
Author(s):  
S. W. Johnson ◽  
J. F. Thedinga ◽  
K. V. Koski
Keyword(s):  
Life History ◽  
Chinook Salmon ◽  
Habitat Preference ◽  
Oncorhynchus Tshawytscha ◽  
Fork Length ◽  
Main Stem ◽  
Seawater Tolerance ◽  
History Of ◽  
Two Phases ◽  
Stream Type

Distribution, abundance, habitat preference, migration and residence timing, seawater tolerance, and size were determined for juvenile ocean-type (age 0) chinook salmon (Oncorhynchus tshawytscha) in the Situk River, Alaska. Chinook primarily occupied main-stem habitats (channel edges in spring, pools and willow edges in summer). Peak chinook densities in the upper and lower main stem were 96 and 76 fish/100 m2, respectively. Chinook migrated downstream in two phases: a spring dispersal of emergent fry and a summer migration. Chinook marked in the upper river in late June and early July were recaptured 20 km downstream in the lower river in late July. Marked chinook resided in the lower river up to 34 d. Mean fork length of chinook in the lower river increased from 40 mm in May to 80 mm in early August. By late August, chinook had emigrated from the lower river at a size of approximately 80 mm. Fish this size were seawater tolerant and had the physical appearance of smolts. Ocean-type chinook in the Situk River are unique because in most Alaskan streams, chinook are stream-type (rear in freshwater at least 1 yr).

Growth dynamics of mosaic muscle fibres in fingerling rainbow trout (Salmo gairdneri) in relation to somatic growth rate

1980 ◽  
Vol 58 (9) ◽  
pp. 1535-1541 ◽  
Author(s):  
A. H. Weatherley ◽  
H. S. Gill ◽  
S. C. Rogers
Keyword(s):  
Growth Rate ◽  
Rainbow Trout ◽  
Fibre Diameter ◽  
Fork Length ◽  
Salmo Gairdneri ◽  
Muscle Fibres ◽  
Experimental Conditions ◽  
Cross Sectional ◽  
Rate Condition ◽  
Epaxial Muscle

We examined the effects of varying water temperature (5, 12, 20 °C), ration size (ad libitum, and 3–4% of dry body weight per day), and injection of bovine growth hormone, on the growth characteristics of the epaxial muscle in laboratory-reared rainbow trout. Although the experimental conditions resulted in differences in growth rate, condition factor (K = W/L3 × 102) and dry weight, we found that, below a fork length of 18–20 cm, an increase in the cross-sectional area of the epaxial muscle occurs mainly by the addition of new fibres. However, between 20 and 25 cm the increase evidently results mainly from an increase in diameter of existing fibres. The relationship between fibre diameter frequency and fork length is characterized, and the implications of this relationship in limiting growth of this species is discussed.

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