Effects of Lampricide on Olfaction and Behavior in Young-of-the-Year Lake Sturgeon (<i>Acipenser fulvescens</i>)

Monogenean worms are ectoparasites that are known to be infectious to a wide variety of fish. Few species of monogenean parasites have been reported in the olfactory chamber of fish in current peer-reviewed literature. However, the impacts of these parasites on the olfactory system are not well understood. In this study, the effects of Gyrodactylus salmonis on the olfactory system structure and performance were investigated in rainbow trout (Oncorhynchus mykiss). The olfactory performance of the infected fish was examined using an electro-olfactography (EOG) technique, while the ultrastructure of the olfactory rosette was studied using scanning electron microscopy (SEM) and light microscopy (LM). The infected rainbow trout displayed reduced responses to two standard olfactory cues (L-alanine and TCA). The SEM micrographs revealed that many regions of the olfactory epithelium in the infected fish were heavily pitted and the LM examination of the olfactory epithelium showed local proliferation of mucous cells in the sensory regions as compared to the control group. The results of this study demonstrated that G. salmonis causes physical damage to the olfactory system of fish that lead to olfactory impairment.

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“…; Sakamoto et al . ). The olfactory sensory neurons (OSNs) of fish are classified in three subclasses.…”

Section: Introductionmentioning

confidence: 97%

“…Fish rely on chemosensation, olfaction in particular, for finding food and mates, and detecting potential predators (Lari et al 2013;Sakamoto et al 2016). The olfactory sensory neurons (OSNs) of fish are classified in three subclasses.…”

Section: Introductionmentioning

confidence: 99%

Gyrodactylus salmonis infection impairs the olfactory system of rainbow trout

Lari

Pyle

2017

Journal of Fish Diseases

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“… 5 , 6 Although the use of niclosamide as a management strategy has been highly effective at controlling oncomelania, niclosamide was toxic to fish and other aquatic organisms. 7 , 8 Meanwhile, niclosamide could inhibit the growth of hydrophytes especially phytoplankton. 9 For example, niclosamide could lead to the poisoning death of grass carp, chub, and ostracean.…”

Section: Introductionmentioning

confidence: 99%

Migration and Transformation Characteristics of Niclosamide in a Soil–Plant System

Luo

Huang

et al. 2018

ACS Omega

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The molluscicide niclosamide is found in most of the wetlands of China. The migration and transformation pathways, and degradation kinetics of niclosamide in the plant–soil system was analyzed by with the use of potting experiment. Experimental results showed that degradation of niclosamide in rhizosphere soil fit the first-order kinetics, and microorganisms played an important role in the degradation of niclosamide. It was found that niclosamide degrades to form a series of aromatic intermediate products both in soil and plants. Niclosamide could be absorbed from soil to plant by the root and then migrate to the stem. At an initial concentration of niclosamide of 2.11 mg·kg–1 in soil, the maximum residue of niclosamide in Artemisia somai aerial was 2.47 mg·kg–1 after 10 days of cultivation. This value is close to the pollution maximum residue limit (3 mg·kg–1) in rice, and niclosamide and its intermediates can remain about 43 days in plants. The experimental results demonstrate that the use of niclosamide in wetlands would have some risk in edible plants and was harmful for human health.

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“…Because TFM uncouples oxidative phosphorylation, exposure to high concentrations over several hours results in significantly reduced high energy phosphagens and glycogen reserves in rainbow trout ( Oncorhynchus mykiss ) muscle and brain [ 12 ]. However, few other studies have examined the sub-lethal physiological effects of TFM on non-target fishes [ 18 – 20 ], and we are unaware of any that have addressed how TFM affects the stress response of non-target fishes. The goal of the present study was to establish if exposure to sub-lethal, environmentally relevant, concentrations of TFM affect the physiology of the rainbow trout, with a specific focus on the hypothalamic-pituitary-interrenal (HPI) axis, which mediates the stress response of fishes, and on liver metabolic capacity, since the liver is involved in detoxification of pesticides.…”

Section: Introductionmentioning

confidence: 99%

Post-exposure effects of the piscicide 3-trifluoromethyl-4-nitrophenol (TFM) on the stress response and liver metabolic capacity in rainbow trout (Oncorhynchus mykiss)

Birceanu

Wilkie

2018

PLoS ONE

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The piscicide 3-trifluoromethyl-4-nitrophenol (TFM) has been used to control invasive sea lamprey (Petromyzon marinus) populations in the Great Lakes for almost 60 years. Applied to rivers and streams containing larval lampreys, TFM seldom harms non-target fishes, but the effects of sub-lethal treatments on fish physiology are not well understood. We examined the effects of 9 h exposure to TFM on the stress axis and liver metabolic capacity of rainbow trout (Oncorhynchus mykiss) using in vivo and in vitro approaches. The fish that had been acutely exposed to TFM in vivo had increased plasma cortisol levels at 12 h post-treatment, but TFM exposure did not interfere with in vitro cortisol production in head kidney preparations. Subjecting trout to an acute handling stressor 12 h post-TFM exposure resulted in a relative attenuation of the plasma cortisol and glucose response compared to pre-stress levels. We conclude that routine TFM treatments can lead to elevations of plasma cortisol following exposure, plus a relative dampening of the stress response in rainbow trout, with high cortisol levels lasting at least 12 h post-treatment. Since the ability of the fish to produce cortisol and the liver metabolic capacity were not compromised following TFM exposure, it is likely that their ability to cope with other stressors is not altered in the long-term.

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Effects of Lampricide on Olfaction and Behavior in Young-of-the-Year Lake Sturgeon (Acipenser fulvescens)

Cited by 17 publications

References 52 publications

Gyrodactylus salmonis infection impairs the olfactory system of rainbow trout

Gyrodactylus salmonis infection impairs the olfactory system of rainbow trout

Migration and Transformation Characteristics of Niclosamide in a Soil–Plant System

Post-exposure effects of the piscicide 3-trifluoromethyl-4-nitrophenol (TFM) on the stress response and liver metabolic capacity in rainbow trout (Oncorhynchus mykiss)

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