scholarly journals BIOLOGY OF THE CALIFORNIA SEA-MUSSEL (MYTILUS CALIFORNIANUS). III. ENVIRONMENTAL CONDITIONS AND RATE OF GROWTH

1944 ◽  
Vol 87 (1) ◽  
pp. 59-72 ◽  
Author(s):  
WESLEY R. COE ◽  
DENIS L. FOX
Keyword(s):  
Environmental Conditions ◽  
Mytilus Californianus ◽  
Rate Of Growth ◽  
California Sea Mussel

scholarly journals Biological peculiarities and characteristics of Erodium tataricum WILLD. cenopopulation in Khakasia

2019 ◽  
Vol 16 ◽  
pp. 00004 ◽  
Author(s):  
Irina Barsukova ◽  
Tatiana Leonova
Keyword(s):  
Environmental Conditions ◽  
Rate Of Growth ◽  
Structural Peculiarities ◽  
Types Of Ontogeny ◽  
Complete Regeneration

Biological and structural peculiarities of Erodium tataricum Willd. cenopopulations in natural surroundings of Khakasia are examined. It is found out that the species make two vegetal forms under the changing environmental conditions. Ontogeny is complete, regeneration does not take place. Two types of ontogeny are found out: morphological and dynamic (according to the rate of growth). Examined Erodium tataricum Willd. cenopopulations are normal and incomplete. They are characterized by left-sided and bimodal ontogenetic spectra.

scholarly journals LOSS OF ZN65FROM THE CALIFORNIA SEA-MUSSEL MYTILUS CALIFORNIANUS

1967 ◽  
Vol 133 (2) ◽  
pp. 438-447 ◽  
Author(s):  
D. R. YOUNG ◽  
T.R. FOLSOM
Keyword(s):  
Mytilus Californianus ◽  
California Sea Mussel

The Life-History of Limnaea truncatula under Laboratory Conditions

1953 ◽  
Vol 27 (1-2) ◽  
pp. 17-28 ◽  
Author(s):  
S. B. Kendall
Keyword(s):  
Life History ◽  
Incubation Period ◽  
Environmental Conditions ◽  
Sexual Maturity ◽  
Atmospheric Temperature ◽  
Egg Laying ◽  
Rate Of Growth ◽  
Laboratory Conditions ◽  
Controlled Conditions ◽  
History Of

1. This paper describes the life-history of Limnaea truncatula under laboratory conditions.2. Under controlled conditions sexual maturity may be reached in 28 days and egg laying continues for the greater part of the snail's life.3. Under good environmental conditions each snail may lay as many as 60 eggs in a single day and a total of more than 3,000 in a life approximately a year.4. Egg laying occurs during every month and at temperatures as low as 10°C. to 11°C. The incubation period of the egg is related to the atmospheric temperature.5. The longevity of the snail is likely to be related to its rate of growth and to environmental conditions including periods of drought.6. The snail remains fully active at temperatures as low at 1.5°C.Sustained temperatures much above 20°C. are unfavourable, temperaturesabove 25°C. proving markedly deleterious.

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