- Journal Article2018Context-dependent interactive effects of non-lethal predation on larvae impact adult longevity and body compositionPLoS ONE. 13(2): e0192104
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Predation impacts development, behavior and morphology of prey species thereby shaping their abundances, distribution and community structure. Non-lethal threat of predation, specifically, can have a strong influence on prey lifehistory characteristics. While investigations often focus on the impact of predation threat on prey in isolation, tests of its interactive effects with food availability and resource competition on prey survival and fitness can improve understanding of costs, benefits and trade-offs of anti-predator strategies. This study, involving Aedes aegypti mosquitoes as a model organism, investigates both simple and interactive effects of predation threat during the larval stage on survival, size at and time to maturity, stored teneral reserves of glycogen, protein and lipid in adults, and adult longevity. Our results show that development times of mosquito larvae were increased (by 14.84% in males and by 97.63% in females), and size of eclosing adults decreased (by 62.30% in males and by 58.33% in females) when exposed to lowered nutrition and elevated intraspecific competition, but that predation had no detectable effect on these simple traits. Teneral reserves of glycogen, protein and lipid and adult longevity were positively correlated with adult body size. Non-lethal predation threat had significant interactive effects with nutrition and larval competition on teneral reserves in males and adult longevity in males and females. The sexes responded differently to conditions encountered as larvae, with the larval environment affecting development and adult characteristics more acutely for females than for males. The outcome of this study shows how threat of predation on juveniles can have long-lasting effects on adults that are likely to impact mosquito population dynamics and that may impact disease transmission.
- Dataset2017Data from: Plant-disperser mutualisms in a semi-arid habitat invaded by Lantana camara L. Plant EcologyData Dryad. http://dx.doi.org/10.5061/dryad.gc6dm
- Journal Article2017Plant-disperser mutualisms in a semi-arid habitat invaded by Lantana camara L.Plant Ecology 218 (8): 935-946Download
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Dispersal is an important ecological process that affects plant population structure and community composition. Invasive plants with fleshy fruits rapidly form associations with native and invasive dispersers, and may affect existing native plant-disperser associations. We asked whether frugivore visitation rate and fruit removal was associated with plant characteristics in a community of fleshy-fruited plants and whether an invasive plant receives more visitation and greater fruit removal than native plants in a semi-arid habitat of Andhra Pradesh, India. Tree-watches were undertaken at individuals of nine native and one invasive shrub species to assess the identity, number and fruit removal by avian frugivores. Network analyses and generalised linear mixed-effects models were used to understand species and community-level patterns. All plants received most number of visits from abundant, generalist avian frugivores. Number of frugivore visits and time spent by frugivores at individual plants was positively associated with fruit crop size, while fruit removal was positively associated with number of frugivore visits and their mean foraging time at individual plants. The invasive shrub, Lantana camara L. (Lantana), had lower average frugivore visit rate than the community of fleshy-fruited plants and received similar average frugivore visits but greater average per-hour fruit removal than two other concurrently fruiting native species. Based on the results of our study, we infer that there is little evidence of competition between native plants and Lantana for the dispersal services of native frugivores and that more data are required to assess the nature of these interactions over the long term. We speculate that plant associations with generalist frugivores may increase the functional redundancy of this frugivory network, buffering it against loss of participating species.
- Popular Article2016Why Mizoram must revive, not eradicate, jhumThe Frontier Despatch, March 4 – 10, 2016, page 6.
- Popular Article2016Shekru sees a blazing issueThe Hindu in School, 13 July
- Popular Article2016In clouded leopard countryThe Hindu Sunday Magazine, 8 October 2016, pages 1-2.
In the rainforest, the rewards of silence sometimes exceed your wildest expectations. From where I sit quietly, I don’t hear a single artificial sound. Unseen cicadas shrill and set the air ringing, woodpeckers cackle from the treetops, and frogs click and boom from the rock-pools alongside the singing river below. From somewhere in the undergrowth, a grey peacock-pheasant sounds an echoing, guttural laugh. In the distance rise great grey cliffs, home of serow (a forest goat-antelope) and bear, overlooking the rainforests where every morning the hoolock gibbons still hoot and sing. Around the steep rock slope where I am stretched out on my back, the looming rainforest envelops me like an amphitheatre. I feel like a tiny flame steady in an evergreen sconce. As yet, I have no inkling of what we are about to witness.
- Dataset2016Data from: Shifting agriculture supports more tropical forest birds than oil palm or teak plantations in Mizoram, northeast India.Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.pk78j.2
This contains the dataset corresponding to this publication:
Mandal J, Raman TRS (2016) Shifting agriculture supports more tropical forest birds than oil palm or teak plantations in Mizoram, northeast India. The Condor: Ornithological Applications 118(2): 345-359. http://dx.doi.org/10.1650/CONDOR-15-163.1
- Popular Article2016The march of the triffids.The BOU Blog, 8 August 2016
Shifting agriculture supports more rainforest birds than oil palm or teak monocultures
- Popular Article2016An urban menagerieThe Hindu in School, 20 January
- Popular Article2016Is oil palm expansion good for Mizoram?The Frontier Despatch, March 18 – 24, 2016, pages 6-7.
- Report2016NCF Annual Report 2016
- Journal Article2016Shifting agriculture supports more tropical forest birds than oil palm or teak plantations in Mizoram, northeast IndiaThe Condor: Ornithological Applications 18: 345–359.Download
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Please see link/PDF for English Abstract. Mizo translation below.
Mizoram, India hmarchhakah oil palm leh teak hmun aiin tlangram lo neih hi ramhnuai sava te tan a hnemhnanawm zawk
Ramngaw leh thlai chi hrang hrang chinna thlawhhma te thlai mal chin bingna atana chán zel hi khawvel pum a humhalhtu te ngaimawh a ni ta. India hmarchhakah pawh, tlang mi te thlawhhma chu, thlai mal (teak, oil palm)-in a lan chho mek bawk. Oil palm leh teak hmun te, chulram (kum 0 – 8 léng) leh lo (ringthar) te leh Dampa ngawpui, Mizoram, India-a mi te kan khaikhin a. Zirbing tura thlan chi nga te hi hmun sawmhnih-ah theuh thendarh a ni a, chumi chhunga thingkung awm te, sava chi hrang awm te, an bit dan leh an tam dan te zirchian a ni. Oil palm hmunah thingkung a tlem ber a, teak hmunin a dawt a, lo leh ngawah te a tam ber thung. Loa thingkung bit zawng (4.3/100m 2 ) hi oil palm hmun (0.5) aiin a sang a, ngawchhung (6.8 – 8.2) a sang fal hle, oil palm hmunah mau a awm lo a, chulah erawh mau a tam thung (25/50m 2 ). Sava chi 107 (ramhnuai-sava 94, dai-sava 13) chhinchiahah oil palm hmunah a tlem ber a (10), teak hmunin a dawt (38); Ngaw hmawr (58) leh chhungril (70) te chu ringthar (50) aiin a sang zawk. Loah leh ngawa ramhnuai sava tam dan a thuhmun a, oil palm hmun aiin 304%-in a sang a, teak hmun aiin 87%-in a sang bawk. Thlai mal chin-bingna aiin lo leh ngawah sava chi thuhmun a tam zawk. Chulramah thing leh mau a than chak avang te, mau hmunin ngai a awh leh hma avangin lo neih hi sava humhalh nan a tha zawk. Lo neih tihmasawn tur zawnga leilung enkawl dan duan chhuah hi a tul takzet a, vahchap sawngbawl dan tha zawk te, tualto thlai uar tur te leh thlaimal chin- bingna hmun hnaia luikam thing chi dang te humhalh tura inkaihhruai a tul hle.
Tawngkam hman bik: sava chi ho, ngawpui, thlawhhma, lo, Tectona grandis, Elaeis guineensis, thilnung tinreng tamna, leilung hmandan tihdanglam
- Popular Article2015Crop cycles: Fire and renewal in MizoramPeople's Archive of Rural India, 21 April 2015
- Popular Article2014Perils of oil palmNewslink (Aizawl), 20 August 2014, page 2.
- Popular Article2014Field and fallow, farm and forestThe Telegraph, Opinion page, 12 April 2014, page 12.Download
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and on blog here: http://coyot.es/elephanthills/2014/04/15/the-dance-of-the-bamboos/
- Journal Article2014Occurrence of Small-toothed Palm Civet Arctogalidia trivirgata in Dampa Tiger Reserve, Mizoram, North-east IndiaSmall Carnivore Conservation 50: 47-49.Download
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Single Small-toothed Palm Civets Arctogalidia trivirgata were seen and photographed on two consecutive nights in March 2014 in Dampa Tiger Reserve, Mizoram, India. They visited a fruiting tree used also by Masked Palm Civet Paguma larvata and Common Palm Civet Paradoxurus hermaphroditus. The present note describes the observation, adding to the few recent records of A. trivirgata from North-east India. The sighting was close to the location of a 1995 sighting of Stripe-backed Weasel Mustela strigidorsa, another species rarely recorded in the region. We suggest further targeted spotlighting and camera-trap surveys for better documentation of the occurrence and distribution of small carnivores in Dampa.
- Popular Article2014Mizoram: bamboozled by land use policyThe Hindu, Op-ed Comment page, 14 May 2014, page 9.
Forest cover loss has occurred at a period when area under jhum cultivation is declining, suggesting that the land use policy has been counterproductive to forests.
- Popular Article2011Habitat is the key.Down To Earth. October 1-15. Page 31.Download
PDF, 1.16 MB
Jeganathan, P. (2011). Habitat is the key. Down To Earth. October 1-15. Page 31.
- Journal Article2010Proposed methods to capture and radio-tag the critically endangered Jerdon's Couser in Andhra Pradesh, India.Telemetry in Wildlife Science, ENVIS Bulletin. WII -Dehradun.Download
PDF, 4.95 MB
Jeganathan, P., Green, R.E., Rahmani, A.R (2010) Proposed methods to capture and radio-tag the critically endangered Jerdon's Couser in Andhra Pradesh, India (in). Sivakumar, K. and Habib,B. (Eds.) 2010. Telemetry in Wildlife Science, ENVIS Bulletin: Widlife & Protected Areas. Vol. 13 No. 1. Wildlife Institute of India, Dehradun - 248001. India. Pp. 205-210.