Toxicity of neem's oil, a potential biocide against the invasive mussel Limnoperna fortunei (Dunker 1857)

Pereyra, Patricio Javier; Rossini, Gustavo Daniel Bulus; Darrigran, Gustavo

doi:10.1590/s0001-37652012005000059

Cited by 18 publications

(15 citation statements)

References 22 publications

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“…A new threat appeared in the region in the mid-1980s and early 1990s –the introduction of invasive bivalve species such as Corbicula fluminea (Müller, 1774) and Limnoperna fortunei (Dunker, 1857) [ 31 ], [ 32 ]. Limnoperna fortunei has an aggressive impact on the environment because it is an ecosystem engineer [ 32 ]. These bioinvasions have changed the structure of communities in impacted freshwater bodies, probably causing further reduction of Unionidan species abundance [ 30 ], [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Distribution of the Unionida (Bivalvia, Paleoheterodonta) from Argentina and its conservation in the Southern Neotropical Region

et al. 2018

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Bivalves are one of the most representative groups in the Phylum Mollusca, with over 1,100 freshwater species around the world except Antarctica. About 900 of these species belong to the Order Unionida Gray, 1854. In South America, the distributional range of the Unionida includes all countries in the region and extends as far south as the lakes and rivers of Argentinean-Chilean Patagonia. With the aim of generating distribution maps for the different genera of Unionida in Argentina, we consulted the databases of the nation’s main official malacological collections. The data were analyzed and georeferenced using the point-radius method. Spatial analyses were performed with the software Q-GIS 2.16.3 Nødebo using vector layers under the 2007 Argentinean Geodesic Positions reference system. A total 1,833 lots were analyzed, of which it was possible to georeference 1,503. The distribution of Unionida in Argentinean territory was analyzed according to political provinces, Surface Drainage Basins and the Argentinean Protected Areas. Species richness was analyzed using the surface drainage basins of Argentina. We generate distribution maps for each genus and discuss the species threat status and conservation degree in the region. Only six (18%) of the Unionida present in Argentina have been classified by the IUCN, four are Least Concern and two are Data Deficient. This pattern is also valid for all of South America. More than 95% of the distributional range of the Unionida has no protected area. Conservation management is necessary for the preservation of Unionida diversity in southern South America.

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Section: Introductionmentioning

confidence: 99%

Distribution of the Unionida (Bivalvia, Paleoheterodonta) from Argentina and its conservation in the Southern Neotropical Region

et al. 2018

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“…A literature review identifies a lack of standardization in the procedures that are used in experimental studies of L. fortunei, such as sampling, transport, rearing, monitoring of the animal's health, acclimation time to the laboratory, size range of the tested animals, monitored physico-chemical parameters, food availability during the experiments, and criteria for the selection of suitable specimens to be tested for each bioassay (Cataldo et al, 2003;Pereyra et al, 2011Pereyra et al, , 2012Di Fiori et al, 2012;Mansur et al, 2012;Calazans et al, 2013;Montresor et al, 2013;Sylvester et al, 2013). In fact, differences between the tested procedures in experimental studies may account for some of the discrepancy observed in the literature results (Rolla and Mota, 2010;Montresor et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Physiological response of invasive mussel Limnoperna fortunei (Dunker, 1857) (Bivalvia: Mytilidae) submitted to transport and experimental conditions

et al. 2017

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Successful animal rearing under laboratory conditions for commercial processes or laboratory experiments is a complex chain that includes several stressors (e.g., sampling and transport) and incurs, as a consequence, the reduction of natural animal conditions, economic losses and inconsistent and unreliable biological results. Since the invasion of the bivalve Limnoperna fortunei (Dunker, 1857) in South America, several studies have been performed to help control and manage this fouling pest in industrial plants that use raw water. Relatively little attention has been given to the laboratory rearing procedure of L. fortunei, its condition when exposed to a stressor or its acclimation into laboratory conditions. Considering this issue, the aims of this study are to (i) investigate L. fortunei physiological responses when submitted to the depuration process and subsequent air transport (without water/dry condition) at two temperatures, based on glycogen concentrations, and (ii) monitor the glycogen concentrations in different groups when maintained for 28 days under laboratory conditions. Based on the obtained results, depuration did not affect either of the groups when they were submitted to approximately eight hours of transport. The variation in glycogen concentration among the specimens that were obtained from the field under depurated and non-depurated conditions was significant only in the first week of laboratory growth for the non-depurated group and in the second week for the depurated group. In addition, the tested temperature did not affect either of the groups that were submitted to transport. The glycogen concentrations were similar to those of the specimens that were obtained from the field in third week, which suggests that the specimens acclimated to laboratory conditions during this period of time. Thus, the results indicate that the air transport and acclimation time can be successfully incorporated into experimental studies of L. fortunei. Finally, the tolerance of L. fortunei specimens to the stressor tested herein can help us understand the invasive capacity of this mussel during the establishment process.Keywords: bioinvasion, glycogen, golden mussel, physiology.Resposta fisiológica do mexilhão invasor Limnoperna fortunei (Dunker, 1857) (Bilvalvia: Mytilidae) submetido ao transporte e condições experimentais ResumoA criação bem sucedida de animais em condições de laboratório para processos comerciais ou experimentais é uma cadeia complexa que inclui vários fatores de estresse (ex. coleta e transporte) que tem como consequência a redução das condições naturais do animal, prejuízos econômicos e resultados biológicos inconsistentes. Desde a invasão do bivalve Limnoperna fortunei (Dunker, 1857) na América do Sul, vários estudos têm sido realizados para ajudar no

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“…The NOAEC (No-Observed-Adverse-Effect-Concentration) is by definition, the highest concentration at which survival of the test organism is not significantly different from the control [30,33]. In other words, it is the highest concentration from the serial dilutions in which the number of fishes died is not significantly different from that in the control.…”

Section: Discussionmentioning

confidence: 99%

“…The range finding test was set according to the protocols defined by OECD [29] and EPA [30]. Five serial dilutions of 100, 400, 800, 1200 and 1600 mg/L aqueous extract were prepared in 10 L aged water.…”

Section: Range Finding Testmentioning

confidence: 99%

Analysis of Achyranthes aspera leaf extract and environmental safety evaluation to non target Nile tilapia fish fingerlings, Oreochromis niloticus.

Mandefro¹,

Tiku²,

Fremichael³

et al. 2021

Preprint

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Background: Although plant molluscicides are biodegradable and less toxic to higher animals, unregulated applications could affect other non target aquatic species. Eco toxicological studies are required to evaluate whether they are safe to those economically and ecologically important fish species. According to previous studies, Achyranthes aspera is a molluscicidal plant with LC90 of 96.5 mg/L and the current study is to investigate its toxic effect to Nile tilapia fish fingerlings, Oreochromis niloticus. Methods: Seven fish fingerlings were exposed to serial dilutions of A. aspera leaf aqueous extract for 96 hours in duplicate setup. Phytoconstituents were identified by GC-MS and lethal concentrations were determined by probit model. The NOAEC was determined by hypothesis testing on the survival data. Results: The respective piscicidal LC1, LC10 and LC50 values were 897.4, 1063.9 and 1310.74 mg/L. The NOAEC was 1100 mg/L (p>0.05). GC-MS analysis revealed 12 phytoconstituents including a monoterpene. Conclusion: The result shows that A. aspera is non toxic and hence is safe to Nile tilapia fish especially at its molluscicidal dose limit (96.5 mg/L LC90) corroborating to the plant’s target specific molluscicidal potential.

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Toxicity of neem's oil, a potential biocide against the invasive mussel Limnoperna fortunei (Dunker 1857)

Cited by 18 publications

References 22 publications

Distribution of the Unionida (Bivalvia, Paleoheterodonta) from Argentina and its conservation in the Southern Neotropical Region

Distribution of the Unionida (Bivalvia, Paleoheterodonta) from Argentina and its conservation in the Southern Neotropical Region

Physiological response of invasive mussel Limnoperna fortunei (Dunker, 1857) (Bivalvia: Mytilidae) submitted to transport and experimental conditions

Analysis of Achyranthes aspera leaf extract and environmental safety evaluation to non target Nile tilapia fish fingerlings, Oreochromis niloticus.

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