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Implications of Insecticide Treated ...

Love, Deirdre H.

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Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems./
Author:	Love, Deirdre H.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	168 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Toxicology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30575897
ISBN:	9798380606523

Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems.
Love, Deirdre H.

Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 168 p.

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--University of Florida, 2023.

This item must not be sold to any third party vendors.

Insecticide treated mosquito nets (ITNs) have been distributed worldwide to reduce malaria infections and studies indicate these nets have led to a roughly 40% global reduction in the incidence of malaria cases. ITNs are typically treated with pyrethroid insecticides, which are highly effective at killing mosquitos, but also have negative effects for off-target organisms. Widespread distribution of ITNs may now be reaching a saturation point as observational data and survey-based research suggests that excess nets are being repurposed for other uses including fishing. Alongside the reports of mosquito net fishing, there are reports of decreased fish quantity and quality. However, there are a lack of studies investigating the impact of ITN fishing on aquatic ecosystems. In this dissertation, ITN leaching, toxicity to aquatic organisms, and fate and transport were explored. The results from this dissertation confirm pyrethroid leaching from ITNs. Interestingly, higher masses of leaching was recorded from smaller net sizes, indicating a possible saturation point. Overt toxicity was observed for D. magna in all 6 fishing exposure scenarios. In P. promelas following exposure to ITNs, there were statistically significant gene expression changes in metabolism and oxidative stress genes. Investigating fate and transport improved understanding of the risk of ITN fishing to aquatic ecosystems. Alpha-cypermethrin was transported to sediment and bioaccumulation was observed within the juvenile P. promelas. Following a risk assessment, alpha-cypermethrin exposure in fish goes beyond the ADI in countries where small amounts of fish are consumed. Overall, results of this dissertation confirm anecdotal evidence that suggests pyrethroids are leaching from ITNs and can negatively impacting aquatic ecosystems. Results from this study also indicate the need for a bigger discussion surrounding the impact of ITN fishing and the subsequent risk of pyrethroid leaching on aquatic and human health.

ISBN: 9798380606523Subjects--Topical Terms:

556884
Toxicology.
Subjects--Index Terms:

Fishing

Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems.
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245 1 0 $a Implications of Insecticide Treated Mosquito Net Fishing for Aquatic Ecosystems.
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500 $a Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
500 $a Advisor: Bisesi, Joseph H.
502 $a Thesis (Ph.D.)--University of Florida, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Insecticide treated mosquito nets (ITNs) have been distributed worldwide to reduce malaria infections and studies indicate these nets have led to a roughly 40% global reduction in the incidence of malaria cases. ITNs are typically treated with pyrethroid insecticides, which are highly effective at killing mosquitos, but also have negative effects for off-target organisms. Widespread distribution of ITNs may now be reaching a saturation point as observational data and survey-based research suggests that excess nets are being repurposed for other uses including fishing. Alongside the reports of mosquito net fishing, there are reports of decreased fish quantity and quality. However, there are a lack of studies investigating the impact of ITN fishing on aquatic ecosystems. In this dissertation, ITN leaching, toxicity to aquatic organisms, and fate and transport were explored. The results from this dissertation confirm pyrethroid leaching from ITNs. Interestingly, higher masses of leaching was recorded from smaller net sizes, indicating a possible saturation point. Overt toxicity was observed for D. magna in all 6 fishing exposure scenarios. In P. promelas following exposure to ITNs, there were statistically significant gene expression changes in metabolism and oxidative stress genes. Investigating fate and transport improved understanding of the risk of ITN fishing to aquatic ecosystems. Alpha-cypermethrin was transported to sediment and bioaccumulation was observed within the juvenile P. promelas. Following a risk assessment, alpha-cypermethrin exposure in fish goes beyond the ADI in countries where small amounts of fish are consumed. Overall, results of this dissertation confirm anecdotal evidence that suggests pyrethroids are leaching from ITNs and can negatively impacting aquatic ecosystems. Results from this study also indicate the need for a bigger discussion surrounding the impact of ITN fishing and the subsequent risk of pyrethroid leaching on aquatic and human health.
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650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
653 $a Fishing
653 $a Malaria infections
653 $a Pesticides
653 $a Aquatic ecosystems
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690 $a 0573
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710 2 $a University of Florida. $b Environmental and Global Health. $3 3762814
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791 $a Ph.D.
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793 $a English
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