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Published byChastity Mills Modified over 9 years ago
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More than you ever wanted to know about Goleta’s Creeks or How I learned to stop worrying about Iraq and my love life by visiting the same crummy locations month after month and year after year.
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Atascadero Creek: Jan. 9, 2005 (above), May 5, 2005 (below) at Puente Ave. at Patterson Ave.
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Atascadero at Ward Ave.: Jan. 9, 2005 (above), summer, 2005 (below)
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From the Main Street Bridge, Ventura River: Feb. 2, 2005 (above), Oct. 2, 2004 (below) looking downstream looking upstream
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From the Shell Bridge, Ventura River: Feb. 2, 2005 (above), Oct. 2, 2004 (below) looking upstream looking downstream
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Temperature Effects –metabolic rate doubles for every 18 o F (10 °C) increase –Influences spawning –Influences growth –colder means more O 2 Fish Categories –warmwater: 75-90 °F (24-32 °C) –coolwater: 60-80 °F (16-27 °C) –coldwater: 48-65 °F (9-18 °C)
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Ah, those steelhead again below 52 °F (11 °C) is ideal above 56 °F (13 °C) eggs begin to die above 70 °F (21 °C) they have trouble extracting O 2 above 77 °F (25 °C) lies severe damage and death
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Dissolved Oxygen Importance –highest cause of mortality Solubility –decreases as these increase temperature elevation salinity Safe levels –greater than 5 mg/L
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Steelhead need more dissolved oxygen above 8 mg/L is ideal hypoxia begins at 6 mg/L below 4 mg/L lies severe damage and death And even more during incubation & hatching Dec thru Mar: increase these limits by 3 mg/L
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I’ll let a great scientist, Richard Feynman, have the last word... "Science is a way of trying not to fool yourself."
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