Estimating the Population Size and Colony Boundary of Subterranean Termites by Using the Density Functions of Directionally Averaged Capture Probability

2008 ◽  
Vol 101 (2) ◽  
pp. 592-604 ◽  
Author(s):  
N.-Y. Su ◽  
S.-H. Lee
Keyword(s):  
Population Size ◽  
Capture Probability ◽  
Subterranean Termites ◽  
Density Functions ◽  
Colony Boundary

RETENTION TIME AND TOXICITY OF A DYE MARKER, SUNDAN RED 7B, ON FORMOSAN AND EASTERN SUBTERRANEAN TERMITES (ISOPTERA: RHINOTERMITIDAE)

1988 ◽  
Vol 23 (3) ◽  
pp. 235-239 ◽  
Author(s):  
Nan-Yao Su ◽  
Rudolf H. Scheffrahn ◽  
Paul Ban
Keyword(s):  
Population Size ◽  
Retention Time ◽  
Reticulitermes Flavipes ◽  
Coptotermes Formosanus ◽  
Subterranean Termite ◽  
Subterranean Termites ◽  
Mark Recapture ◽  
Coptotermes Formosanus Shiraki ◽  
Eastern Subterranean Termite ◽  
Significant Mortality

Workers of the Formosan subterranean termite, Coptotermes formosanus Shiraki, and the eastern subterranean termite, Reticulitermes flavipes (Kollar) were force-fed a dye marker, Sudan Red 7B, and confined with different proportions of unmarked termites. No significant mortality due to the dye was detected for up to 8 weeks after the treatment in either species. The marked/unmarked proportion did not affect the retention of the dye or mortality. Workers of C. formosanus retained visible dye for 6 weeks, while significant numbers (10–50%) of marked R. flavipes lost the dye within two weeks. Sudan Red 7B is suitable for estimating population size of C. formosanus with the multiple-marking method where the mark-recapture period extends to 6 weeks. The dye is not an adequate marker for R. flavipes when the mark-recapture period is ≥ 2 weeks.

scholarly journals Combinatorial Potential of bait matrix against subterranean termites under lab and field conditions

Sociobiology ◽  
2016 ◽  
Vol 63 (2) ◽  
pp. 831 ◽  
Author(s):  
Khalid Rasib ◽  
Hina Ashraf
Keyword(s):  
Field Experiment ◽  
Population Size ◽  
Field Conditions ◽  
Subterranean Termites ◽  
Termite Species ◽  
Odontotermes Obesus ◽  
Wood Consumption ◽  
Laboratory Bioassays

Bait matrix of different treatments were evaluated against two termite species i.e. Odontotermes obesus and Coptotermes heimi both under laboratory and field conditions. Mean wood consumption in laboratory bioassays were investigated for 2, 4 and 6 weeks with maximum consumption was noted after 4 weeks. While, field experiment was conducted for 24 there was greater consumption of the loosely bound bait matrix compared to the tightly bound matrix. However, feeding was comparatively high in combinations with attractants. Overall, treated colonies experienced a 90-95% decrease in population size after 24 weeks of baiting. The queen in the royal chamber of the mound was found dead. 

Estimates of sex ratio require the incorporation of unequal catchability between sexes

2012 ◽  
Vol 39 (4) ◽  
pp. 350 ◽  
Author(s):  
Evan J. Pickett ◽  
Michelle P. Stockwell ◽  
Carla J. Pollard ◽  
James I. Garnham ◽  
John Clulow ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Population Size ◽  
Population Studies ◽  
Capture Probability ◽  
Ecological Studies ◽  
Mark Recapture ◽  
Closed Population ◽  
Litoria Aurea ◽  
Biased Sex Ratio ◽  
Probability Methods

Context Estimates of the sex ratio of a population are a common summary statistic used for ecological studies and conservation planning. However, methods to determine the sex ratio often ignore capture probability, which can lead to a perceived bias in the sex ratio when the sexes are detected at different rates. Aims To illustrate the bias from conventional count-based analysis methods for determining sex ratio by comparison with analytical methods that include capture probability. Methods Closed-population mark–recapture analysis was used to determine the population size of each sex within a population of green and golden bell frogs (Litoria aurea). This was then compared with the traditional count-based methods of estimating sex ratio to determine the effect of incorporating capture probability on the sex ratio estimate. Key results More males than females were detected during surveys, producing a male-biased sex ratio when there was no incorporation of capture probability. Mark–recapture results indicated a similar population size between the two sexes, suggesting that the sex ratio is closer to even. Conclusions Methods to estimate sex ratio that incorporate capture probability can significantly reduce the bias obtained from count data. Implications We suggest that population studies must incorporate capture probability to determine the sex ratio of a population.

scholarly journals Estimation of Population Size When Capture Probability Depends on Individual States

2018 ◽  
Vol 24 (1) ◽  
pp. 154-172 ◽  
Author(s):  
Hannah Worthington ◽  
Rachel S. McCrea ◽  
Ruth King ◽  
Richard A. Griffiths
Keyword(s):  
Population Size ◽  
Capture Probability

scholarly journals Movements and capture-recapture data analysis of the vesper rat (Nyctomys sumichrasti : Rodentia, Muridae) in a tropical forest in northeastern Oaxaca, Mexico.

2010 ◽  
Vol 26 (3) ◽  
Author(s):  
Martín Pérez-Lustre ◽  
Antonio Santos-Moreno
Keyword(s):  
Data Analysis ◽  
Standard Deviation ◽  
Population Size ◽  
Extreme Values ◽  
Average Distance ◽  
Survival Rates ◽  
Capture Probability ◽  
Complete Study ◽  
Capture Recapture ◽  
Males And Females

In order to explain the population demography of the Vesper Rat (Nyctomys sumichrasti) and with regarding to an estimate of population size and survival rates, as well as possible differences in the movements distances between males and females, we analyzed capture-recapture data of this species from a trapping effort of 455 trap-nights and a total of 157 captures of 36 individuals which were livetraped at 3 trap heights: 3-9 m above ground (low canopy), 9-15 m (medium canopy) and the highest part of the canopy, 15-21.5 m. Due to differences between age categories in sample size, the analysis of capture-recapture histories was restricted to adult individuals. The sample of 29 adult individuals included 12 females (8 singletons and 4 captured in the complete study) and 17 males (5 singletons and 12 captured in the complete study); which represents a sex-ratio of 1:1.41, which did not differ statistically from 1:1. The capture-recapture histories were analyzed using the Cormack-Jolly-Seber model, where the best model maintains the survival constant and equal between sexes, and capture probability is constant through time, but differs between sexes. The survival probability was 0.8287, while the capture probability was 0.874 for males and 0.5733 for females. Estimated population size included 19 males and 21 females. The average distance travelled by females was 34.86 m (standard deviation 5.92) with extreme values of 20.1 to 60.32, whereas for males was 35.42 m (standard deviation 18.27), with extreme values of 10.3 to 75.1 m.

Sign in / Sign up

Export Citation Format

Share Document