Growth Relative to Growth at Current pH

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Hemicentrotus pulcherrimus [Sea Urchin]

Statistics  
  Decline in pH from the Present
 
0.0 to 0.09
0.09 to 0.17
0.17 to 0.3
0.3 to 0.5
More than 0.5
Number of Results
2
 
2
2
4
Arithmetic Mean
0.47
 
0.88
0.82
0.64
Standard Error
0.33
 
0.02
0.01
0.05

Individual Experiement Results  
      Decline in pH from the Present    

Journal References

Experimental Conditions
0.0
to
0.09
0.09
to
0.17
0.17
to
0.3
0.3
to
0.5
More
than
0.5

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by aerating the experiment chambers with air containing different concentrations of CO2. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

0.85

 

 

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by aerating the experiment chambers with air containing different concentrations of CO2. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

0.80

 

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by aerating the experiment chambers with air containing different concentrations of CO2. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

 

0.76

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by aerating the experiment chambers with air containing different concentrations of CO2. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

 

0.55

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by adding various quantities of HCl. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

0.91

 

 

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by adding various quantities of HCl. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

0.83

 

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by adding various quantities of HCl. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

 

0.72

Kurihara and Shirayama (2004)

Air and seawater CO2 concentrations were controlled by adding various quantities of HCl. To determine the effects of CO2 concentration on larval morphology, ten 4-armed pluteus larvae cultured for 3 days were sampled randomly and mounted on glass slides. The mounted larvae were photographed and the overall length of each larva was measured under a microscope using an ocular micrometer.
 

 

 

 

0.52

Shirayama and Thornton (2005)

Relative growth rate of juvenile (<1 year old) sea urchins (Hemicentrotus pulcherrimus) growing for six months under normal and reduced pH conditions was determined. Throughout the experiment, light exposure was not controlled and the temperature of the seawater fluctuated between 24.1 and 25.5C. Reduced pH values were obtained by bubbling CO2 enriched air into the experiment tanks.
0.00

 

 

 

 

Shirayama and Thornton (2005)

Relative growth rate of juvenile (<1 year old) sea urchins (Hemicentrotus pulcherrimus) growing for six months under normal and reduced pH conditions was determined. Throughout the experiment, light exposure was not controlled and the temperature of the seawater fluctuated between 20.0 and 23.9C. Reduced pH values were obtained by bubbling CO2 enriched air into the experiment tanks.
0.93

 

 

 

 


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