Allodontermes tenax Silvestri, 1912 执着奇齿白蚁

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1. Food Preference and Survival Rates of Allodontermes tenax (Isoptera: Termitidea)

   Makila Jacob, Millicent Florence Owuor Ndong’a, Omukunda Elizabeth · 2022 · Egyptian Academic Journal of Biological Sciences

   摘要

   The main goal of this research was to determine food preference and survival rates ofAllodontermes tenax. Traditionally, A.tenax has been induced to swarm during the dry season. In order to determine the best substrate for mass production, it was necessary to find a suitable food substance that enhanced the survival of the termites in the laboratory and hence can be applied in situ. The study was carried out in Trans-Nzoia at an altitude of 1,900 meters, with a latitude of 1°1'8.72"N, and a longitude of 35°0'8.3"E. The main activity in the area is crop farming and livestock husbandry. Termite workers were collected when swarming and placed in 500grams collection jars and taken to the laboratory. Some of the alates and a number of small or large soldiers and workers were preserved in 80% ethanol for identification. The experiments involved testing food preference and survival rates on maize cob husks on loam soil; maize stalk on loam soil; eucalyptus wood on loam soil; wheat straw on loam soil; pinewood on loam soil and loam soil alone as a substrate. The loam soil was put in an incinerator for 24hours to remove any organic matter present in the soil for all the treatments. The insect used in these experiments were workers of at least the third instar since earlier experiments have shown that workers below the third instar have a low survival rate under the same laboratory conditions. Two experiments were performed to determine food preference and survival rates. For each experiment, 15 rearing containers measuring 18x15x7 cm were used. After 2, 4 and 6 weeks, the samples were removed from the rearing chamber and the surviving termites were counted. The number of surviving termite workers found from each treatment was used to calculate the survival rate. The treatment with the highest survival rate was deemed the most preferred food and hence enhanced survival. The rate of survival was highest in wheat straw and loam with a grand average of 82.26% followed by maize stalk and loam with 63.82%. Apart from the control experiment, the lowest survival rates were observed in a pinewood at 47.72%. This shows that wheat straw enhanced the survival of A. tenax and hence the most preferred food item.

2. Comparative Amino Acid Content of Pseudocanthotermes grandiceps, Macrotermis jeanelli and Allodontermes tenax (Isoptera: Termitidea)

   Makila Jacob, Omukunda Elizabeth, Millicent Florence Owuor Ndong’a · 2022 · Egyptian Academic Journal of Biological Sciences

   摘要

   The main objective of this study was to compare the amino acid profiles of P.grandiceps, M. jeanelli and A. tenax. The study was carried out in Trans-Nzoia at an altitude of 1,900 meters, with a latitude of 1°1'8.72"N, and longitude of 35°0'8.3"E. Termite alates was collected when swarming and placed in 500grams collection jars and taken to the laboratory for amino acid analysis. Some of the alates and a number of small or large soldiers and workers were preserved in 80% ethanol for identification at the National Museums of Kenya. The collected termite alates were analyzed for composition of amino acids using standard methods detailed in AOAC (2000). From the results, there was no significant difference in amino acid content, amino acid classes, amino acid groups and total essential amino acids and total non-essential amino acids of the three termite species. Glutamic acid was the most abundant of the three species. It ranged between 8.43g/100g - 15.5g/100g. The lowest concentrated amino acid was cysteine ranging between 0.60g/100g- 3.92g/100g. Leucine was found to be the most highly concentrated essential amino acid (eaa); 7.72g/100g crude protein in P. grandiceps, 7.48g/100g in M. jeanelli and 5.51g/100g in A. tenax. Methionine was the lowest eaa in P. grandiceps at 0.88g/100g crude protein while Histidine was the lowest eaa in both M. jeanelli and A. tenax at 2.15g/100g and 2.09g/100g respectively.

3. Foraging and distribution patterns in a termite assemblage dominated by fungus-growing species in semi-arid northern Botswana

   Gregor W. Schuurman · 2006 · Journal of Tropical Ecology

   摘要

   Termite foraging was monitored with cellulose baits in both the wet and dry season in the semi-arid Okavango Delta region of northern Botswana. Seven wood-feeding species were found. Fungus-growing termites dominated the assemblage in all plots, and four species (Macrotermes michaelseni, Odontotermes sp. A, Allodontermes sp. and Microtermes sp.) were found in most. Foraging by smaller-bodied Allodontermes sp. and Microtermes sp. was largely confined to the wet season. Foraging by M. michaelseni and Odontotermes sp. A was more constant, but showed a general peak in the early dry season (May and June), likely due to nutrient and energy demands associated with alate production. Despite extensive overlap in distributions of these species, co-occurrences on baits were significantly less frequent than expected by chance. In addition, incidence in a plot of Allodontermes sp. and Microtermes sp. was negatively correlated in the wet season, as was that of M. michaelseni and Odontotermes sp. A in the dry season. Differences in body size, life history, and nest structure produce temporal and spatial heterogeneity in the foraging and distribution patterns of termites, and therefore suggest that consideration of community composition can improve prediction of the influence of termite assemblages on decomposition.

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