| Event name: | CA-92-011 | |
| Country: | CANADA | |
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Nature of the harmful event: |
Mass mortalities | |
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Event directly affected: |
Aquaculture Fish | |
| Toxicity detected: | No | |
| Associated syndrome: | OTHER | |
| Unexplained toxicity: | No | |
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes | |
| Event occurred before in this location: | No | |
| Individuals to contact: | FORBES, J. Roderick | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Upper West coast of Vancouver Island, Pacific Region HAB Area code(s): CA-35 |
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| Additional location information: | Kyuquot Sound and Nootka Sound. | |
| Bloom event dates (yyyy/mm/dd): | ||
| Quarantine levels dates (yyyy/mm/dd): | ||
| Additional date-related information: | Late August 92. | |
| Causative organism known: | Yes | |
| Causative Species/Genus: |
Heterosigma akashiwo
( cells/L)
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| Co-Ocurring Species/Genus: | ||
| Chlorophyll concentration, if known: | µg/l | |
| Additional bloom information: | Heterosigma akashiwo intermixed with various other, presumed non-harmful species. | |
| Event-related bibliography: | ||
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| Nutrient information: | ||||||||||||||||||||||||||
| Temperature Range During Event: | Max: °C, Min: °C | |||||||||||||||||||||||||
| Salinity Range During Event: | ||||||||||||||||||||||||||
| Bloom location in the water column: | ||||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | H. akashiwo believed to be in situ growth, although a major bloom of mixed phytoplankton species (including Noctiluca scientillans and Ceratium spp.) occurred concurrently in the inlets and in open water off the entrances to the affected inlets. | |||||||||||||||||||||||||
| Additional Environmental information: | Water temperatures unusually warm for the area, as the west coast was under the influence of a moderate El Niño event. Sea surface temperatures were 1 - 2º C warmer than usual on the exposed, outer coast, being in the range of 14 - 15º C through much of A | |||||||||||||||||||||||||
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| Kit used: | Type of kit used: | ||||||
| Additional information: | |||||||
| Economic losses: | Value in excess of $ 1.5 million. | ||||||
| Management decision: | Not applicable. | ||||||
| Additional harmful effect information: | |||||||
