Culture Methods and Effects of Temperature and Salinity on Survival and Growth of Dungeness Crab (Cancer magister) Larvae in the Laboratory

1969 ◽  
Vol 26 (2) ◽  
pp. 389-397 ◽  
Author(s):  
Paul H. Reed
Keyword(s):  
Growth Rate ◽  
Good Survival ◽  
Population Fluctuations ◽  
Dungeness Crab ◽  
Balanus Glandula ◽  
Cancer Magister ◽  
Culture Methods ◽  
Recent Interest ◽  
Survival And Growth ◽  
Effects Of Temperature

Recent interest in causes of Dungeness crab (Cancer magister) population fluctuations led to a study of temperature and salinity effects on survival and growth of zoeae.Preliminary work developed methods for culturing larvae in flasks with good survival. A comparison of survival of larvae fed two different diets showed the nauplii of the barnacle Balanus glandula and larvae of the bay mussel Mytilus edulis were suitable and unsuitable food organisms, respectively.The optimum ranges of temperature and salinity for laboratory-cultured C. magister zoeae were 10.0–13.9 C and 25–30‰, respectively. Zoeal survival was not significantly affected by temperatures and salinities approximating ocean ranges of these variables off the Oregon coast during the larval period. The growth rate of C. magister zoeae was directly related to temperature, but salinities that favored survival did not appear to affect the zoeal growth rate.

scholarly journals Effects of floral thermogenesis on pollen function in Asian skunk cabbage Symplocarpus renifolius

2009 ◽  
Vol 5 (4) ◽  
pp. 568-570 ◽  
Author(s):  
Roger S. Seymour ◽  
Yuka Ito ◽  
Yoshihiko Onda ◽  
Kikukatsu Ito
Keyword(s):  
Growth Rate ◽  
Pollen Germination ◽  
Narrow Range ◽  
Temperature Tolerance ◽  
Early Spring ◽  
Long Period ◽  
Pollen Tube Growth Rate ◽  
Skunk Cabbage ◽  
Effects Of Temperature

The effects of temperature on pollen germination and pollen tube growth rate were measured in vitro in thermogenic skunk cabbage, Symplocarpus renifolius Schott ex Tzvelev, and related to floral temperatures in the field. This species has physiologically thermoregulatory spadices that maintain temperatures near 23°C, even in sub-freezing air. Tests at 8, 13, 18, 23, 28 and 33°C showed sharp optima at 23°C for both variables, and practically no development at 8°C. Thermogenesis is therefore a requirement for fertilization in early spring. The narrow temperature tolerance is probably related to a long period of evolution in flowers that thermoregulate within a narrow range.

EFFECTS OF TEMPERATURE ON RATE AND DURATION OF KERNEL DRY MATTER ACCUMULATION OF MAIZE

1988 ◽  
Vol 68 (4) ◽  
pp. 935-940 ◽  
Author(s):  
M. TOLLENAAR ◽  
T. W. BRUULSEMA
Keyword(s):  
Growth Rate ◽  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Dry Weight ◽  
Controlled Environment ◽  
Dry Matter Accumulation ◽  
Linear Kernel ◽  
Effects Of Temperature ◽  
Kernel Growth

The response of rate and duration of kernel dry matter accumulation to temperatures in the range 10–25 °C was studied for two maize (Zea mays L.) hybrids grown under controlled-environment conditions. Kernel growth rates during the period of linear kernel growth increased linearly with temperature (b = 0.3 mg kernel−1 d−1 °C−1). Kernel dry weight at physiological maturity varied little among temperature treatments because the increase in kernel growth rate with increase in temperature was associated with a decline in the duration of kernel growth proportional to the increase in kernel growth rate.Key words: Zea mays L, period of linear kernel dry matter accumulation, controlled-environment conditions, kernel growth rate

Effects of temperature and body weight on growth rate and feed conversion ratio in turbot (Scophthalmus maximus)

Aquaculture ◽  
2009 ◽  
Vol 295 (3-4) ◽  
pp. 218-225 ◽  
Author(s):  
Tómas Árnason ◽  
Björn Björnsson ◽  
Agnar Steinarsson ◽  
Matthías Oddgeirsson
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Scophthalmus Maximus ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Effects Of Temperature ◽  
Turbot Scophthalmus Maximus

Population Structure of Dungeness Crab (Cancer magister) in British Columbia

2008 ◽  
Vol 27 (4) ◽  
pp. 901-906 ◽  
Author(s):  
Terry D. Beacham ◽  
Janine Supernault ◽  
Kristina M. Miller
Keyword(s):  
British Columbia ◽  
Population Structure ◽  
Dungeness Crab ◽  
Cancer Magister

Biology of Oscillatoria cf. chalybea, a 2-methylisoborneol producing blue-green alga of Mississippi catfish ponds

1995 ◽  
Vol 31 (11) ◽  
pp. 173-180 ◽  
Author(s):  
M. van der Ploeg ◽  
M. E. Dennis ◽  
M. Q. de Regt
Keyword(s):  
Growth Rate ◽  
Specific Growth ◽  
Light Availability ◽  
Continuous Light ◽  
Light Cycle ◽  
Blue Green Alga ◽  
Continuous Cultures ◽  
Effects Of Temperature ◽  
Catfish Ponds ◽  
Specific Growth Rates

Relative abundance of Oscillatoria cf. chalybea was monitored during May-November, 1993, in 40 ponds at four catfish farms located 50-100 km apart in west central Mississippi, USA. The occurrence of O. cf.chalybea coincided with the period that water temperatures remained above 20°C. In 70% of ponds, O. cf.chalybea was present for a period of 2-20 weeks. The alga recurred in all ponds where it had been present in 1990 and 1991. The effects of temperature and light availability on growth rate and 2-methylisoborneol (MIB) production of O. cf. chalybea were studied in continuous cultures. At 28°C, maximum specific growth rates were 0.8 d−1 (24 h light) and 0.6 d−1 (14 h light :10 h dark). Algal cells contained less MIB when adapted to the shorter light cycle than when grown under continuous light. Specific growth rate of O. cf.chalybea dropped from 0.3 to 0.1 d−1 when temperature was changed from 21 to 19.5°C (14 h light).

Effects of temperature on growth rate and body size in the Mediterranean Sea anemone Actinia equina

2004 ◽  
Vol 313 (1) ◽  
pp. 63-73 ◽  
Author(s):  
O. Chomsky ◽  
Y. Kamenir ◽  
M. Hyams ◽  
Z. Dubinsky ◽  
N.E. Chadwick-Furman
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Mediterranean Sea ◽  
Sea Anemone ◽  
Effects Of Temperature ◽  
The Mediterranean

scholarly journals Microbiological Characteristics of Dungeness Crab (Cancer magister)1

1975 ◽  
Vol 30 (1) ◽  
pp. 72-78
Author(s):  
J. S. Lee ◽  
D. K. Pfeifer
Keyword(s):  
Dungeness Crab ◽  
Cancer Magister ◽  
Microbiological Characteristics

scholarly journals The rooting, survival and growth of woody species on tailing dumps in the limestone quarry “Lafarge ciment”

2021 ◽  
Vol 13 (1(22)) ◽  
pp. 34-42
Author(s):  
Petru Cuza ◽  
◽  
Corina Certan ◽  
Constantin Bulimaga ◽  
◽  
...  
Keyword(s):  
Growth Rate ◽  
Environmental Factors ◽  
Slow Growth ◽  
Woody Species ◽  
Mineral Elements ◽  
Black Pine ◽  
Limestone Quarry ◽  
Survival And Growth ◽  
High Degree ◽  
Fast Growing Species

The rooting, the survival and dynamics of growths in the height and after the diameter of the seedlings, of a range of woody species, had investigated on the freshly formed sterile dump limestone quarry „Lafarge Ciment”. The seedlings of the woody species had a relatively good rooting (69-99%). A high degree of rooting can be ensured as a result of the maintenance of forest crops. After planting, the young seedlings must be cared for by hoeing as many times as necessary in order to control the weeds and maintain moisture in the soil, which increases the survival of the seedlings. Tree species have been characterized by a different growth rate. Acacia has showed a very rapid increase in height, but the black pine has been characterized by a slow growth. Acacia being a fast-growing species and unpretentious to the mineral elements in the soil can be used to afforest the limestone quarry land. In the fi rst year after planting, the young seedlings, otherwise sensitive to the action of the environmental factors, had an increase in height and in diameter slow and uneven. In the years that followed, the seedlings became more viable and less infl uenced by local and temporal fl uctuations of environmental factors.

scholarly journals The Effect of Temperature and Humidity May Reduce the Growth Rate of the Coronavirus Disease 2019 Epidemic

2020 ◽  
Author(s):  
Lei Qin ◽  
Qiang Sun ◽  
Jiani Shao ◽  
Yang Chen ◽  
Xiaomei Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Relative Humidity ◽  
Effect Of Temperature ◽  
Average Temperature ◽  
Temperature And Humidity ◽  
Scatter Plots ◽  
Low Humidity ◽  
Average Relative Humidity ◽  
Effects Of Temperature ◽  
The Relationship

Abstract Background: The effects of temperature and humidity on the epidemic growth of coronavirus disease 2019 (COVID-19)remains unclear.Methods: Daily scatter plots between the epidemic growth rate (GR) and average temperature (AT) or average relative humidity (ARH) were presented with curve fitting through the “loess” method. The heterogeneity across days and provinces were calculated to assess the necessity of using a longitudinal model. Fixed effect models with polynomial terms were developed to quantify the relationship between variations in the GR and AT or ARH.Results: An increased AT dramatically reduced the GR when the AT was lower than −5°C, the GR was moderately reduced when the AT ranged from −5°C to 15°C, and the GR increased when the AT exceeded 15°C. An increasedARH increased theGR when the ARH was lower than 72% and reduced theGR when the ARH exceeded 72%.Conclusions: High temperatures and low humidity may reduce the GR of the COVID-19 epidemic. The temperature and humidity curves were not linearly associated with the COVID-19 GR.

scholarly journals Mangrove Rehabilitation at Alo Beach (Karakelang Islands, Talaud) Using Propagul of Rhizophora mucronata Lamk

Jurnal Wasian ◽  
2017 ◽  
Vol 4 (2) ◽  
pp. 69
Author(s):  
Ady Suryawan
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Rhizophora Mucronata ◽  
Randomized Design ◽  
Waves And Tides ◽  
Survival And Growth ◽  
Mangrove Rehabilitation ◽  
Main Factor

This study aimed to know the dynamic of survival rate and growth of Rhizophora mucronata Lamk which planted by using propagules at Alo Beach, Karakelang Island, Talaud. The study was conducted from June 2013 to April 2017, used a complete randomized design with 6 treatments i.e. K1, K2, K3, K4, K5, K6. The amount of propagules in every treatment were 100 pieces each. The parameter observed were characteristic of substrat, survival rate,height and diameter of the plant’s in age of 1.5 months and 48 months. The results showed that treatment had a significant effect on survival rate and growth of Rhizophora mucronata plants. The rehabilitation was categorized as success at 1.5 months old, but it was failed inthe 48 months. Beside waves and tides, low substrat nutrition became the main factor that affect the success of mangrove rehabilitation in Alo Beach.The K5 treatment has the highest survival and growth rate of the plant. The K5 treatment using pnematophore as brace, while planting without brace/K1 has lowest survival and growth rate since months old.Keywords: mangroves, rehabilitation, Rhizophora mucronata, Talaud

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