A Study of the Changes in an Aquatic Insect. Population, using Minnows as Predators

An intensive field survey on aquatic insects of Me Linh Station for Biodiversity in Vinhphuc province was conducted in December 2015. Specimens were collected at 8 different sites and aquatic insects were collected both quantitatively by Surber net and qualitatively by hand net, pond net. As a result, a total of 110 aquatic insect species belonging to 98 genera, 49 families and 9 orders were recognized. Among these, the order Ephemeroptera had the highest species number with 26 species, followed by Odonata with 25 species, Trichoptera with 18 species, Coleoptera with 15 species, Hemiptera with 11 species, Diptera with 9 species. Lepidoptera, Plecoptera and Megaloptera had the lowest of species number, represented by 3 species of Lepidoptera, 2 species of Plecoptera and 1 species of Megaloptera. Besides, the quantitative analysis results and the functional feeding groups were provided.

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The Impact of Insect Infestation on Stored Purpled Cocoa Beans

Journal of Energy and Natural Resource Management ◽

10.26796/jenrm.v1i2.36 ◽

2018 ◽

Vol 1 (3) ◽

pp. 176-181 ◽

Cited By ~ 3

Author(s):

E. Tettey

Keyword(s):

Weight Loss ◽

Insect Population ◽

Insect Infestation ◽

Percentage Weight Loss ◽

Cocoa Beans ◽

Significant Damage ◽

Percentage Weight ◽

Fermentation Period ◽

The Impact

Under-fermentation of cocoa beans produces purple beans. The fermentation period is 6 to 7 days but some cocoa farmersunder-ferment their cocoa beans leading to the development of purple cocoa beans. This study determined the impact of insectinfestation on stored purple cocoa beans. Wet cocoa beans were fermented for 1, 2, 3, 4 and 5 days to produce the purple beans.Ephestia cautella and Tribolium castaneum, both singly and in combination, were introduced into the cocoa beans and storedfor different (30, 60, 90 and 120 days) period. Insect population, percentage weight loss and the contaminants produced bythese insects were determined. Cocoa beans infested with E. cautella alone had the highest population of 297.0 ± 22.7. Beansfermented for 3 days had the lowest insect population both singly and in combination after 120 days of storage. The highestpercentage weight loss was recorded in cocoa beans fermented for one day (10.1 ± 1.87%) and 4 days (10.1 ± 8.74%). T.castaneum did not cause much damage to the cocoa beans but E. cautella alone caused significant damage to stored cocoabeans. Insect infestation and poor fermentation contribute significantly to the reduction in quality of cocoa beans.

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New Data on the Aquatic Insect Fauna of Tunisia

Transactions of the American Entomological Society ◽

10.3157/061.144.0309 ◽

2018 ◽

Vol 144 (3) ◽

pp. 575

Author(s):

Nard Bennas ◽

Ouassima L'Mohdi ◽

Mohamed El Haissoufi ◽

Faouzia Charfi ◽

Adnen Ghlala ◽

...

Keyword(s):

Aquatic Insect ◽

Insect Fauna ◽

Aquatic Insect Fauna

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Faculty Opinions recommendation of Sexually transmitted disease epidemics in a natural insect population.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1031036.364481 ◽

2006 ◽

Author(s):

H Charles J Godfray

Keyword(s):

Sexually Transmitted Disease ◽

Transmitted Disease ◽

Insect Population ◽

Sexually Transmitted ◽

Disease Epidemics

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Faculty Opinions recommendation of Nonnative trout impact an alpine-nesting bird by altering aquatic-insect subsidies.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.11944959.13068058 ◽

2011 ◽

Author(s):

Mark Hay

Keyword(s):

Aquatic Insect

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Do carabids (Coleoptera: Carabidae) and chironomids (Diptera: Chironomidae) exhibit similar diversity and distributional patterns along a spatio-temporal gradient on a glacier foreland?

Journal of Limnology ◽

10.4081/jlimnol.2018.1794 ◽

2018 ◽

Author(s):

Mauro Gobbi ◽

Valeria Lencioni

Keyword(s):

Species Richness ◽

Species Turnover ◽

Aquatic Insect ◽

Taxonomic Diversity ◽

Carabid Beetles ◽

Species Assemblages ◽

Glacier Foreland ◽

Distributional Patterns ◽

Glacier Front ◽

Spatio Temporal

Carabid beetles and chironomid midges are two dominant cold-adapted taxa, respectively on glacier forefiel terrains and in glacial-stream rivers. Although their sensitivity to high altitude climate warming is well known, no studies compare the species assemblages exhibited in glacial systems. Our study compares diversity and distributional patterns of carabids and chironomids in the foreland of the receding Amola glacier in central-eastern Italian Alps. Carabids were sampled by pitfall traps; chironomids by kick sampling in sites located at the same distance from the glacier as the terrestrial ones. The distance from the glacier front was considered as a proxy for time since deglaciation since these variables are positively correlated. We tested if the distance from the glacier front affects: i) the species richness; ii) taxonomic diversity; and iii) species turnover. Carabid species richness and taxonomic diversity increased positively from recently deglaciated sites (those c. 160 m from the glacier front) to sites deglaciated more than 160yrs ago (those located >1300 m from glacier front). Species distributions along the glacier foreland were characterized by mutually exclusive species. Conversely, no pattern in chironomid species richness and turnover was observed. Interestingly, taxonomic diversity increased significantly: closely related species were found near the glacier front, while the most taxonomically diverse species assemblages were found distant from the glacier front. Increasing glacial retreat differently affect epigeic and aquatic insect taxa: carabids respond faster to glacier retreat than do chironomids, at least in species richness and species turnover patterns.

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