Monitoring the acoustic activity of an aquatic insect population in relation to temperature, vegetation and noise

The existence of a diurnal cycle in the rate of production of acoustic signals by aquatic heteropterans has been observed by several workers (Leston 1955; Mitis 1936; Schaller 1951; Theiss 1983). These accounts all mention an increase in acoustic activity in early evening. Jansson (1968, 1973) determined that the single strongest component releasing acoustic behavior was light level in the genera Cenocorixa and Callicorixa and that different species of Cenocorixa had different maxima. The study reported here began as an examination of diel periodicity of song incidence in the corixid bug Palmacorixa buenoi but results were substantially different in kind from most other studies of this nature in the literature.

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

Proceedings of the Zoological Society of London ◽

10.1111/j.1096-3642.1944.tb00213.x ◽

2009 ◽

Vol 114 (1-2) ◽

pp. 74-81 ◽

Cited By ~ 3

Author(s):

E. J. Popham

Keyword(s):

Aquatic Insect ◽

Insect Population

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Measuring Acoustic Activity as a Method to Evaluate Welfare in Captive Beluga Whales (Delphinapterus leucas)

Aquatic Mammals ◽

10.1578/am.32.3.2006.325 ◽

2006 ◽

Vol 32 (3) ◽

pp. 325-333 ◽

Cited By ~ 15

Author(s):

Manuel Castellote ◽

Fulvio Fossa

Keyword(s):

Delphinapterus Leucas ◽

Acoustic Activity ◽

Beluga Whales

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Aquatic insect larvae are major players in mediating lakes' carbon-sequestering capacities in the warming world

10.1603/ice.2016.110362 ◽

2016 ◽

Author(s):

Viktor A. Baranov

Keyword(s):

Aquatic Insect ◽

Insect Larvae ◽

Carbon Sequestering ◽

Warming World ◽

Aquatic Insect Larvae

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Preliminary Results on Aquatic Insects in the Me Linh Station for Biodiversity, Vinh Phuc Province

VNU Journal of Science Natural Sciences and Technology ◽

10.25073/2588-1140/vnunst.4696 ◽

2017 ◽

Vol 33 (4) ◽

Author(s):

Nguyen Van Hieu ◽

Nguyen Van Vinh

Keyword(s):

Quantitative Analysis ◽

Aquatic Insects ◽

Field Survey ◽

Aquatic Insect ◽

Insect Species ◽

Functional Feeding Groups ◽

Species Number ◽

Feeding Groups ◽

Preliminary Results

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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