Temperature effects on growth and maturity of butterfish (Pholis gunnellus) in Iceland

2002 ◽  
Vol 82 (5) ◽  
pp. 903-906 ◽  
Author(s):  
Ásgeir Gunnarsson ◽  
Karl Gunnarsson
Keyword(s):  
Growth Rate ◽  
Incubation Time ◽  
West Coast ◽  
Temperature Effects ◽  
Effect Of Temperature ◽  
The West ◽  
Sea Temperature ◽  
Temperature Regimes ◽  
Higher Temperature ◽  
Similar Growth

The effect of temperature on growth of butterfish, Pholis gunnellus on the west coast of Iceland was studied from September 1995 to March 1997. Butterfish were collected monthly at two sites with different temperature regimes. According to otolith readings butterfish can reach 12 years. The fish in the area with higher sea temperature were larger at all ages but had similar growth rates. Higher temperature seems to result in a shorter incubation time of butterfish eggs and/or higher growth rate of the larvae, leading to larger larvae size at settlement.

Temperature Effects on Translocation Patterns of Several Herbicides within Quackgrass (Agropyron repens)

Weed Science ◽  
1988 ◽  
Vol 36 (5) ◽  
pp. 545-552 ◽  
Author(s):  
K. Neil Harker ◽  
Jack Dekker
Keyword(s):  
Methyl Ester ◽  
Ethyl Ester ◽  
Growth Temperature ◽  
Temperature Effects ◽  
Butyl Ester ◽  
Effect Of Temperature ◽  
Night Temperature ◽  
Rhizome Growth ◽  
Temperature Regimes ◽  
Increasing Temperature

A growth cabinet study was conducted to evaluate the effect of temperature on the distribution of several herbicides in quackgrass. Uniformly labeled14C-sucrose and the radiolabeled herbicides glyphosate, sethoxydim, cloproxydim, the butyl ester of fluazifop, the methyl ester of haloxyfop, and the ethyl ester of quizalofop were applied to quackgrass grown at three day / night temperature regimes (10/5, 20/15, and 30/25 C). Seven days after treatment the plants were harvested, lyophilized, and later sectioned, mapped, and oxidized in preparation for14C quantification. Quackgrass rhizome growth was more vigorous at 20/15 than 30/25 or 10/5 C. of the herbicides tested, haloxyfop was the most inhibitory to rhizome growth. Temperature increases from 10/5 to 20/15 or from 20/15 to 30/25 C resulted in more translocation to shoots. Increasing temperature had various effects on translocation to rhizomes depending on the chemical applied. At all three temperature regimes, more14C was recovered from distal than basal buds in plants treated with14C-sethoxydim. In contrast, at all three temperature regimes, similar amounts of14C were recovered from the distal and basal buds of plants treated with 14-C-sucrose.

Some notes on the biology of the snake blenny, Lumpenus lampretaeformis on the west coast of Scotland

1979 ◽  
Vol 59 (2) ◽  
pp. 413-419 ◽  
Author(s):  
J. D. M. Gordon ◽  
J. A. R. Duncan
Keyword(s):  
Growth Rate ◽  
Seasonal Variation ◽  
West Coast ◽  
Seasonal Variations ◽  
Rapid Growth ◽  
The West ◽  
Harpacticoid Copepods ◽  
Rapid Growth Rate ◽  
Inshore Waters ◽  
Made In

Large catches of the snake blenny, Lumpenus lampretaeformis, have been made in the inshore waters of the west coast of Scotland. Analysis of these catches confirm the view that this species shows marked seasonal variations in abundance. The species lives for up to 9 years and has a rapid growth rate in the first 2 years. It feeds mainly on meiobenthic organisms, of which polychaetes, harpacticoid copepods, ostracods and nematodes are the most important. The reason for the seasonal variation in catch rate is discussed and it is speculated that it may result from the fossorial habit of the adults and the parental care of the eggs.

Effects of Salinity and Temperature on Embryonic Development of the Petrale Sole (Eopsetta jordani)

1971 ◽  
Vol 28 (5) ◽  
pp. 727-744 ◽  
Author(s):  
D. F. Alderdice ◽  
C. R. Forrester
Keyword(s):  
West Coast ◽  
Environmental Variability ◽  
Meteorological Data ◽  
Effect Of Temperature ◽  
The West ◽  
Spawning Period ◽  
Hatching Time ◽  
Class Strength ◽  
Egg Density ◽  
Strength Effect

Newly fertilized eggs were incubated at 13 combinations of levels of salinity and temperature between 20 and 35‰, and 4.1 and 8.5 C. Average egg density throughout development was 1.0252, and the incubation period ranged from 6.2 to 13.5 days. Larval length at mean hatching time averaged 2.84 mm for all trials. External features of the larvae are described. The percentages of eggs hatching (total hatch) and producing viable larvae (viable hatch) are examined with respect to salinities and temperatures of incubation. Calculated optima were: total hatch 29.47‰ S, 6.65 C; viable hatch 27.93‰ S, 7.00 C. At 6.3, 7.2, and 8.1 C, larvae grew to 5.5–5.7 mm total length prior to exhaustion of yolk 246–393 hr after hatching. It was concluded that greatest numbers of viable larvae of largest size at yolk exhaustion would occur from incubation at 27.5–29.5‰ S and 6–7 C.Laboratory results are related to available hydrographic and meteorological data for a spawning area off the west coast of Vancouver Island. Estimates are given of direction, depth, and duration of drift of the pelagic stages until exhaustion of the yolk. Environmental variability in the spawning period is related to existing measures of year-class strength. Effect of temperature on egg development is related to the range of the species in terms of estimated temperatures available at spawning depths.

scholarly journals Temperature changes alter the acute toxicity responses of cypermethrin in Zebrafish

2018 ◽  
Vol 29 (1) ◽  
pp. 64-70 ◽  
Author(s):  
MH Uddin ◽  
MS Alim ◽  
SMM Islam ◽  
H Rashid ◽  
M Shahjahan
Keyword(s):  
Blood Glucose ◽  
Acute Toxicity ◽  
Probit Analysis ◽  
Effect Of Temperature ◽  
Temperature Changes ◽  
Temperature Regimes ◽  
Higher Temperature ◽  
T1 And T2 ◽  
Increasing Temperature ◽  
The Impact

The study was carried out to determine the effect of temperature changes on acute toxicity of pyrethroid pesticide cypermethrin in zebrafish. A two-day renewal bioassay system for 96h was conducted to find out LC50 value of cypermethrin at two temperature regimes i.e. 25°C and 30°C considering as T1 and T2, respectively. During the determination of LC50 in both temperatures, blood glucose (mg/dL) levels were measured at lower concentration (0.25 µg/L) of cypermethrin. The results of acute toxicity test at 96h LC50 values were calculated through probit analysis. It was found that 96h LC50 for T1 and T2 groups were about 2.1 and 1.4 µg/L, respectively. Significantly lower LC50 of cypermethrin at T2 compared to T1 showed that higher temperature increased the toxicity of cypermethrin. There was a significant increase (P<0.05) in blood glucose level (mg/dL) in 0.25 µg/L compared to 0 µg/L concentration of cypermethrin at both treatments. Dissolved oxygen decreased and free CO2 increased significantly (P<0.05) with increasing temperature, while the pH of the water was almost unchanged throughout the study period. The present study indicated the impact of increased temperature on pesticide toxicity in the aquatic ecosystem.Progressive Agriculture 29 (1): 64-70, 2018 

Nucleation of Disorder in Fe3Al Alloys

1967 ◽  
Vol 25 ◽  
pp. 312-313
Author(s):  
P. R. Swann ◽  
W. R. Duff ◽  
R. M. Fisher
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Annealing Temperature ◽  
Antiphase Domain ◽  
Effect Of Temperature ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries ◽  
Higher Temperature ◽  
The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

Eelgrass (Zostera marina) restoration on the west coast of Sweden using seeds

2016 ◽  
Vol 546 ◽  
pp. 31-45 ◽  
Author(s):  
E Infantes ◽  
L Eriander ◽  
PO Moksnes
Keyword(s):  
West Coast ◽  
Zostera Marina ◽  
The West
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