Relationship between respiration rate of juvenile brook trout (Salvelinus fontinalis), water temperature, and swimming characteristics

1995 ◽  
Vol 52 (10) ◽  
pp. 2138-2145 ◽  
Author(s):  
Ming Tang ◽  
Daniel Boisclair
Keyword(s):  
Water Temperature ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Oxygen Demand ◽  
Oxygen Depletion ◽  
Biological Oxygen Demand ◽  
Average Speed ◽  
Video Cameras ◽  
Cost Variation ◽  
The Cost

We estimated the cost of spontaneous swimming and the swimming characteristics of juvenile brook trout for 21 combinations of water temperature (3.5, 6, 9, 12, 15, 18, and 20.7 °C) and respirometer volume (27, 54, and 108 L). Spontaneous swimming costs were estimated as the oxygen depletion in the respirometers corrected for biological oxygen demand of the water and standard metabolism of the fish. Spontaneous swimming costs varied 9-fold among our experiments. Swimming characteristics, such as the average and the variance of speed, acceleration, and turning rates, were determined using a pair of video cameras. Swimming characteristics varied 2- to 10-fold among experiments. Speed and turning rate tended to increase with water temperature up to 18 °C and decreased at 20.7 °C. Water temperature (r2 = 0.44) was the only variable that could explain a significant portion of the variations of spontaneous swimming costs between 3.7 and 20.7 °C. Variance of speed (partial R2 = 0.32) and the average turning rate (partial R2 = 0.34) explained 53% of the variation between 3.7 and 18 °C. Average speed never explained more than 35% of spontaneous swimming cost variation.

Influence of body weight, swimming characteristics, and water temperature on the cost of swimming in brook trout (Salvelinus fontinalis)

2000 ◽  
Vol 57 (7) ◽  
pp. 1482-1488 ◽  
Author(s):  
Ming Tang ◽  
Daniel Boisclair ◽  
Chantal Ménard ◽  
John A Downing
Keyword(s):  
Experimental Data ◽  
Water Temperature ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Significant Proportion ◽  
Average Difference ◽  
Fish Swimming ◽  
Experimental Conditions ◽  
Fish Weight ◽  
The Cost

We performed respirometry experiments to estimate the spontaneous swimming costs of brook trout (Salvelinus fontinalis) for 24 combinations of fish weight (3.5, 17, and 32 g), water temperature (4, 12, and 18°C), and respirometer size (27, 54, and 108 L). Fish swimming characteristics were estimated for each experiment using videocamera recordings and image analysis. Under our experimental conditions, average swimming characteristics of fish, such as swimming speed and turning and acceleration rates, varied from 2.5- to 29-fold. Our data, alone or combined with similar published results on brook trout weighing 1 g, indicated that fish weight was the only variable that could explain a statistically significant proportion of the variations of spontaneous swimming costs for that species (r2 = 0.91). Our work confirms, with a wider range of experimental data, that spontaneous swimming costs of fish are 3- to 22-fold (8-fold average difference) more energy demanding than predicted by forced swimming models developed using fish swimming at constant speeds and directions in flumes.

scholarly journals Physico-chemical Parameters of Koshi River at Kushaha Area of Koshi Tappu Wildlife Reserve

Our Nature ◽  
1970 ◽  
Vol 9 (1) ◽  
pp. 156-167 ◽  
Author(s):  
D. Thapa Chhetry ◽  
J. Pal
Keyword(s):  
Dissolved Oxygen ◽  
Water Temperature ◽  
Air Temperature ◽  
Oxygen Demand ◽  
Summer Season ◽  
Biological Oxygen Demand ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Chemical Parameters ◽  
Wildlife Reserve

The Koshi river is the major tributaries of the Ganges which originates from the snowy peaks of Tibetan plateau in the central Himalayas. Its total catchment area is 60,400 km2, of which 28,140 km2 lies in Nepal, while the remainder is situated in Tibet. It passes from Nepal to India via the Koshi Tappu Wildlife Reserve area of Nepal. It destroys large area through floods, especially in India. This paper deals with the air temperature and phyco-chemical parameters like temperature, transparency, pH, oxygen, carbondioxide, alkalinity, hardness, chloride and biological oxygen demand of water of Koshi river at Kushaha area of Koshi Tappu Wildlife Reserve. The water temperature was recorded maximum in summer season but the transparency, pH, dissolved oxygen, total alkalinity and total hardness were recorded maximum in winter season. Similarly, free carbondioxide was maximum in rainy season and chloride and biological oxygen demand were recorded maximum in summer season. The air temperature and water temperature had positive and significant correlation with free carbondioxide and biological oxygen demand. Dissolved oxygen had positive and significant correlation with pH, total alkalinity and total hardness. Similarly, total alkalinity had positive and significant correlation with transparency, total hardness, chloride etc.DOI: http://dx.doi.org/10.3126/on.v9i1.5746

Growth and Resistance to Stress in Brook Trout Fed Sublethal Levels of DDT

1968 ◽  
Vol 25 (11) ◽  
pp. 2443-2451 ◽  
Author(s):  
Kenneth J. Macek
Keyword(s):  
Weight Gain ◽  
Water Temperature ◽  
Brook Trout ◽  
Feeding Rate ◽  
Salvelinus Fontinalis ◽  
Physiological Stress ◽  
Environmental Stresses ◽  
Exposed Fish ◽  
Cumulative Mortality ◽  
Resistance To Stress

When underyearling brook trout (Salvelinus fontinalis) were fed DDT at a rate of 2.0 mg/kg per week for 31 weeks, they exhibited greater weight gain (43.2 ± 0.8 g) during the period than did untreated fish (36.6 ± 1.1 g). When underyearling fish were fed DDT at different rates for 26 weeks and then starved or fed at a rate equivalent to 10% of the usual feeding rate, the cumulative mortality during this period was 96.2% among fish exposed to 3.0 mg/kg per week, 88.6% among fish exposed to 2.0 mg/kg per week, and 1.2% among untreated fish. Differences in the length of survival of DDT-exposed fish occurred due to dosage, sex, and type of starvation. The evidence suggests that the mortality of DDT-exposed fish was due to the interaction of DDT residues with a combination of environmental stresses, namely starvation, decreasing water temperature, and possibly the physiological stress associated with the spawning season.

Influence of Seasonal Temperature Variation on pH, Dissolved Oxygen and Biological Oxygen Demand in Tamdil Lake, Mizoram, India

2018 ◽  
Vol 6 (2) ◽  
pp. 59-63
Author(s):  
Lalzahawmi Chenkual ◽  
◽  
B.P Mishra ◽  
Laltan puia ◽  
Mary Lalthansangi ◽  
...  
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Significant Relationship ◽  
Water Samples ◽  
Oxygen Demand ◽  
Ecological Factors ◽  
Quality Parameters ◽  
Biological Oxygen Demand ◽  
Seasonal Temperature

Temperature is one of the most important ecological factors which play a significant role on the earth, and all the living organisms have evolved various methods to meet extremes of temperature. Seasonal temperature variations are quite significant in freshwater lakes and ponds. The present study deals with the effect of seasonal variations of water temperature on different water quality parameters of Tamdil lake, Mizoram, India, for a period of two years, i.e., from March, 2014 to February, 2016. The water samples were collected from five sampling sites, and the average reading was calculated for each of the water quality attributes namely, temperature, pH, Dissolved Oxygen (DO) and Biological Oxygen Demand (BOD). The water samples were analyzed monthly, and the results are computed on seasonal basis, i.e., pre-monsoon, monsoon, post- monsoon and winter seasons. Statistically, there was a positive and significant relationship between water temperature and pH, and negative significant relationship between temperature and DO. A negative correlation was observed between temperature and BOD. The result shows that there is a significant seasonal variation in physico-chemical parameters. The lake has not reached the polluted stage yet.

scholarly journals New record of three species of Leeches (Annelida:Hirudinea) in Al-Hindyia River / Babil Province / Iraq

2019 ◽  
Vol 16 (3(Suppl.)) ◽  
pp. 0677
Author(s):  
AL-Ameen Et al.
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
New Record ◽  
Oxygen Demand ◽  
Biological Oxygen Demand ◽  
Temperature Potential ◽  
Total Dissolved Solid ◽  
Physical And Chemical ◽  
Chemical Water

In this study, a total of 209 individuals of leeches were collected from Al-Hindyia River / Babil Province. 116 individuals were identified as Erpobdella octaculata (Linnaeus, 1758), 50 individuals as Erpobdella punctata (Leidy,1870) and  43 individuals as Hemiclepsis marginata (Müller, 1774).  Four samples were collected monthly during a period from February to June 2018. Some physical and chemical water properties were also examined, including air and water temperature, potential of hydrogen pH, Electrical Conductivity EC, Total Dissolved Solid TDS, Dissolved Oxygen DO, and the Biological Oxygen Demand BOD₅.  Air and water temperature were ranged 19.5-29, & 14.6-23.2 °C respectively. The values of pH ranged 6.2-7.6. EC ranged 1104-1581 μs/cm². The TDS recorded 669- 767 mg/l, while the DO reached 1.3- 8.5 mg / l, the BOD₅ ranged 3.5- 5.7 mg/l.

Escalated aggression in interpopulation brook trout dyads: evidence for behavioural divergence

2003 ◽  
Vol 81 (5) ◽  
pp. 911-915 ◽  
Author(s):  
Robert Dunbrack ◽  
Lynn Clarke
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Low Cost ◽  
Isolated Populations ◽  
Communication Failure ◽  
Behavioural Assessment ◽  
Different Populations ◽  
The Cost ◽  
Population Norm

The "communication-failure" hypothesis states that individuals whose agonistic displays deviate from the population norm are selected against because of the greater likelihood of their becoming involved in escalated contests. A corollary of this hypothesis is that the level of aggression in dyadic (pairwise) contests over resources is predicted to be higher the greater the behavioural divergence between the two contestants. Display divergence between two contestants from different populations should exceed that in intrapopulation dyads, consequently this prediction can be tested by comparing levels of aggression in contests between interpopulation dyads with those in contests between intra population dyads. We carried out such a test using brook trout (Salvelinus fontinalis) from two isolated populations in eastern Newfoundland. In initial encounters, the nipping rate (a measure of aggressiveness) of individuals from one of these populations was significantly higher in interpopulation dyads than in intrapopulation dyads. These results are consistent with the communication-failure hypothesis, as well as with the view that behavioural assessment, using low-cost stereotypic displays, reduces the cost of interactions over resources for both contestants.

Impact of Brook Trout (Salvelinus fontinalis) Predation on the Crayfish Orconectes virilis in Three Michigan Lakes

1979 ◽  
Vol 36 (10) ◽  
pp. 1191-1196 ◽  
Author(s):  
H. Gowing ◽  
W. T. Momot
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
First Year ◽  
Orconectes Virilis ◽  
Trout Population ◽  
Production Growth ◽  
First Year Of Life ◽  
The Cost ◽  
Slow Growing ◽  
Northern Michigan

The crayfish Orconectes virilis is a major component of the benthos of three small lakes in northern Michigan. These lakes contained stocked brook trout (Salvelinus fontinalis) populations (age-0 and age-I) at densities of 188, 411, and 1398 fish/ha. Crayfish were preyed upon by brook trout, but only during their first year of life. Two-year production of age-0 crayfish was approximately 94 kg in each lake; brook trout consumed only about 1–2% in lakes with lower density offish. Even with greater trout density and accompanying higher rate of exploitation (40%), there was no impact on recruitment of young crayfish because compensatory mortality of crayfish occurred in lakes with less trout predation. However, stocking trout at higher densities decreased trout growth and condition. While 2-yr production was highest (59 kg/ha) in the lake stocked at the highest density and lowest (17 kg/ha) in one stocked at the lowest density, the former was achieved at the cost of a very slow growing trout population. Most of the crayfish production is not utilized as trout food but enters the non-predatory pool of detrital organic matter. Key words: Orconectes virilis, brook trout, predation, production growth, mortality

Changes in a Stream Population of Trout Associated with Increased Silt

1965 ◽  
Vol 22 (2) ◽  
pp. 395-404 ◽  
Author(s):  
J.W. Saunders ◽  
M.W. Smith
Keyword(s):  
Water Temperature ◽  
Brook Trout ◽  
Prince Edward Island ◽  
Salvelinus Fontinalis

Low standing crops of brook trout, Salvelinus fontinalis, were closely associated with silting in Ellerslie Brook, Prince Edward Island, and appeared to result from the destruction of hiding places. Spawning was also curtailed by silting. Following scouring, trout stocks soon increased. The remarkable adaptability of trout to silting, in a habitat with favourable flow and water temperature, was illustrated.

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