Growth, survivability, and reproductive effects of pulse-dosed endosulfan on jordanella floridae (florida flagfish) over one complete life-cycle

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.

Name thesis:degree_name

Master of Science (MSc)

Discipline thesis:degree_discipline

Applied Bioscience

Grantor

University of Ontario Institute of Technology

Year dc:date.issued

2009

Author dc:creator

• Beyger, Lindsay Alexandra

Advisor dc:contributor.advisor

• Holdway, Douglas

• Endosulfan
• Life-cycle
• Reproduction
• Flagfish

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/10155/36

OAI identifier oai:identifier

oai:ontariotechu.scholaris.ca:10155/36