Patterns in Abundance and Seasonality of Insects in the Siruvani Forest of Western Ghats, Nilgiri Biosphere Reserve, Southern India

Arun, P.R.; Vijayan, Varsha

doi:10.1100/tsw.2004.33

Cited by 14 publications

(14 citation statements)

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“…The peak of species richness and abundance of butterflies was recorded in the month of November and December. Researchers reported the similar findings of lycaenid abundance (Kunte 1997, Arun 2000, Arun and Vijayan 2004, Mathew and Anto 2007, Tiple and Khurad 2009, Hussain et al 2011, Akand 2012, Akand et al 2015b. Temporal changes in the abundance of lycaenid butterflies can be related to the adult food sources (Hill 1992).…”

Section: Relative Humiditymentioning

confidence: 65%

“…But this phenomenon was altered in the years (2015, 2016 and 2017) among habitats. The temporal fluctuations in abundance are an important manifestation of populations" response to the environmental conditions (Arun and Vijayan 2004). Such seasonal variation in the abundance of a species is an adaptive phenomenon evolved through evolution to take maximum advantage from the ambient environmental conditions (Arun 2000).…”

Section: Resultsmentioning

confidence: 99%

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Status of lycaenid butterflies in some selected forests of Bangladesh

Akand

Bashar

Khan

2020

J. Biodivers. Conserv. Bioresour. Manag.

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A field investigation was carried out from January 2015 to December 2017 to study the status of some lycaenid butterflies in some selected forest areas of Bangladesh. A total of 6,724 lycaenids was recorded from Butterfly Research Park at Bhawal National Park, Gazipur; Madhupur National Park, Tangail; Satchori National Park and Rema-Kalenga Wildlife Sanctuary of Habigonj. The dominant species was Arhopala pseudocentaurus with 21.85% relative frequency and the least abundant species was Rathinda amor with 0.75% relative frequency. Butterfly Research Park showed the maximum number of butterfly individuals with a covariance of 40% followed by Madhupur National Park (37%), Rema-Kalenga Wildlife Sanctuary (13%), and Satchori National Park (10%). A significant difference (F = 3.52, p-value = 0.02) has been assessed using „One-way ANOVA‟ test. The difference in the availability of butterflies in different habitats indicated the differences in plant diversity among the forests. Lycaenid butterflies displayed highest abundance (13.19%) in December and lowest (5.38%) in October. There was no significant difference (F = 0.72, p-value = 0.71) among different months throughout the study period in overall species abundance though highest number was recorded in December. The abiotic factors (viz. temperature and relative humidity etc.) influence the presence of butterflies. Lycaenid butterflies demonstrated the highest abundance (887) in 26.9°C along with 64% relative humidity whereas the least abundance (362) has been recorded at 31.7°C with 77% relative humidity. The significant negative correlation was found in between lycaenid abundance and temperature (r = ─ 0.45, pvalue = 0.14), and between lycaenid abundance and relative humidity (r = ─ 0.19, p-value = 0.54). The butterfly population increased with decreasing average temperature and relative humidity during the study period. This investigation reveals the differences in the availability of lycaenid butterflies in relation to the differences in plant population and also the effect of abiotic factors in the forest areas. J. Biodivers. Conserv. Bioresour. Manag. 2019, 5(2): 19-32

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Section: Relative Humiditymentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Status of lycaenid butterflies in some selected forests of Bangladesh

Akand

Bashar

Khan

2020

J. Biodivers. Conserv. Bioresour. Manag.

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“…We believe this assumption to be reasonable because it is based on empirical observations from previous studies in the same study area (Brandt and Cresswell , Molokwu et al , ). Furthermore, insect abundance is generally lower in the dry season as in other seasonal tropical environments (Frith and Frith , Arun and Vijayan , Silva et al ) so that parents may work harder to raise young when they breed during the dry season. Moreover, differences in precipitation (Supplementary material Appendix 1, Fig.…”

Section: Discussionmentioning

confidence: 99%

Breeding limits foraging time: evidence of interrupted foraging response from body mass variation in a tropical environment

Nwaogu

Dietz

Tieleman

et al. 2017

Journal of Avian Biology

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Birds should store body reserves if starvation risk is anticipated; this is known as an 'interrupted foraging response'. If foraging remains unrestricted, however, body mass should remain low to limit the predation risk that gaining and carrying body reserves entails. In temperate environments mass gain in female birds during breeding is often attributed to egg formation and mass loss after incubation to flight adaptation or the effect of reproductive workload, rather than as a result of an adaptive interrupted foraging response to the limited foraging time or unpredictable foraging conditions that breeding demands. In tropical environments, foraging conditions vary more within the breeding season than in temperate environments, and so studies in tropical environments are more suited to decouple the potentially confounded effects of increase in body reserves versus egg formation on the body mass of breeding birds. In this study, we test whether breeding results in an interrupted foraging response in a tropical savannah system using body mass data collected over a 15-year period from female Common Bulbuls Pycnonotus barbatus. This species breeds both in the wet and dry season, despite fewer resources being available in the dry season. Breeding stage predicted female body mass: body mass peaked abruptly during incubation, but was not closely associated with the egg-laying stage, and declined during brood rearing. Breeding females were heavier in the dry season than in the wet season. In the dry season, heavier birds were more likely to incubate eggs or brood chicks. These observations suggest that increased body reserves are required to buffer the consequence of limited foraging time or impoverished foraging conditions, which may be most pronounced during incubation and in the dry season, respectively. Such mass increases are consistent with an interrupted foraging response, which may apply to temperate zone birds experiencing foraging restrictions during breeding.

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“…Wolda (1988) mentioned that in the tropical regions, changes in temperature were minimal and could not affect the seasonality of the insects during the year. However, Arun & Vijayan (2004) who studied the influence of five climate factors on insect populations in the South of India concluded that only the minimum temperature was correlated to monthly variation in species abundance. Intachat et al.…”

Section: Discussionmentioning

confidence: 99%

Seasonality in adult flight activity of two neuroptera assemblages of southern Mali

Michel

Cadet

2009

African Journal of Ecology

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The seasonality of insect assemblages in Africa is poorly investigated. To provide information on the relationships between climate and insect assemblages in the Sudanian region, strongly affected by climate change, we studied Myrmeleontidae and Ascalaphidae assemblages (Insecta: Neuroptera) for 7 and 5 consecutive years respectively in southern Mali. To make the species inventory as exhaustive as possible, we performed weekly sampling by netting and light trapping. For both assemblages, results showed very similar patterns of variation in species diversity throughout the year. Adults of Myrmeleontidae and Ascalaphidae were active all year, and the species succession was influenced by a strong temporal segregation. Species diversity peaked at the end of the rainy season and surprisingly during the dry season. Principal component analysis of the climatic factors followed by co‐inertia analysis applied to two data sets, one comprising climatic factors and the other reporting presence/absence of species, showed a good association between the annual trend of climatic factors and the species diversity. But no well defined species grouping was clearly linked to a particular period of the year. This tight association between climate and species composition suggests that even small climate changes could modify significantly species assemblage characteristics.

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Patterns in Abundance and Seasonality of Insects in the Siruvani Forest of Western Ghats, Nilgiri Biosphere Reserve, Southern India

Cited by 14 publications

References 10 publications

Status of lycaenid butterflies in some selected forests of Bangladesh

Status of lycaenid butterflies in some selected forests of Bangladesh

Breeding limits foraging time: evidence of interrupted foraging response from body mass variation in a tropical environment

Seasonality in adult flight activity of two neuroptera assemblages of southern Mali

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