Endosulfan is a commonly used organochlorine in Durham Region, Ontario Canada
which has known toxic effects on non-target organisms including fish. This research
investigated the effects of endosulfan on Florida flagfish (Jordanella floridae), using both
continuous and pulse-exposure. The 96 hour continuous exposure LC50 in larval flagfish
was 4.35 μg/L; sub-lethal observations included hyperactivity, convulsions, and some
axis malformation. The effects of a 4 hour endosulfan pulse-exposure on 7-8 day-old
larval growth, reproduction, and survivability were investigated over one full life-cycle.
The 4 hour pulse-exposure LC50 value for larval flagfish was 49.7 μg/L; there were no
growth or reproductive effects of endosulfan pulse-exposure up to the highest exposure
concentration of 10 μg/L. Thus, the life-cycle 4-h pulse-exposure no observed effect
concentration (NOEC) and lowest observed effect concentration (LOEC) were 3.2 and 10
μg/L endosulfan, respectively, due to significantly higher mortality.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OOSHDU.10155/36 |
| Date | 01 August 2009 |
| Creators | Beyger, Lindsay Alexandra |
| Contributors | Holdway, Douglas |
| Publisher | UOIT |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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