Udara Nipuna Ratnayake

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• BSc (Hons) Zoology l Dip in Paleo-biodiversity l Dip in Zooarchaeology
• Graduate Teaching Assistant at University of Ruhuna

Asian seabass: Lates calcarifer is a catadromous and commercially valuable food fish with wide geographical distribution. The present study was carried out to evaluate the length structured dietary shift of L. calcarifer in associated coastal habitats. A total of 81 samples were collected based on their total length (TL) as a proper representation...

Asian seabass: Lates calcarifer is a carnivorous, catadromous and commercially valuable food fish with a wide geographical distribution. It is considered as a potential candidate for aquacultural practices and recreational fisheries. Recent morphological and molecular evidence suggest that Asian seabass from different geographic regions is likely t...

Sustainable mangrove conservation has become a global challenge due in part to a lack of cohesion between knowledge, awareness, and practices among communities. The present study thus aimed to quantify the knowledge, attitudes, and perceptions (KAP) regarding mangrove ecosystem conservation among university students, who have the potential to serve...

Asymmetricata impressa Olivier is one of the Luciolinae fireflies in Sri Lanka. The original description of this species as Luciola impressa was based on male and female specimens collected from Peradeniya, Kandy, Central Province of Sri Lanka in 1910. There were no subsequent records of A. impressa following its original description, and hence, it...

The species richness, abundance and distribution of butterflies associated with a home garden, which was comprised of three micro-habitats; a grassland [GL], shrubland [SL] and disturbed-forest [DF], at Hanguranketha region, Nuwara Eliya district, was determined for a period of four months from September to December 2021, using a visual encounter s...

Bigeye trevally (Caranx sexfasciatus) has been considered as a commercially valuable aquaculture carangid fish with ornamental and food values. Characteristic intra/interspecific cryptic speciation among individuals of C. sexfasciatus, C. ignobilis, C. tille and C. melampygus is pronounced due to the environmental conditions, developmental changes...

Bactrocera dorsalis is the most serious fruit pest in Asia and B. kandiensis is an endemic fruit fly species to Sri Lanka. In addition, B. correcta and Zeugodacus cucurbitae are other commonly recorded fruit fly species in Sri Lanka. There were many taxonomic impediments when discriminating fruit fly species using their wing shape and wing venation...

Background: Bactrocera dorsalis is the most frightening fruit pest in Asia and B. kandiensis is an endemic fruit pest in Sri Lanka. In addition, B. correcta and Zeugodacus cucurbitae are other commonly recorded fruit fly species in Sri Lanka. There were many taxonomic impediments when discriminating fruit fly species using their wing shape and wing...

The species richness, abundance and distribution of butterflies associated with a home garden, which was comprised of three micro-habitats; a grassland [GL], shrubland [SL] and disturbed-forest [DF], at “Hanguranketha” region, Nuwara Eliya district, was determined for a period of four months using a visual encounter survey. A 100m transect was esta...

The previously unexplored Gurudeniya region in Kandy district was surveyed for adult odonate diversity and abundance. Three habitats, i.e., along the “Thalathuoya” tributary, adjacent forest cover and a home garden, were selected for the study. Sampling was conducted twice a week, during 8 am − 9 am and 4 pm−5 pm for three months from October to De...

Mangrove ecosystems are identified as one of the most productive ecosystems and provide a range of ecosystem services, yet they have been heavily subjected to the decline over past years. Therefore, enhancing the knowledge, attitude, and perception (KAP) on mangroves conservation among stakeholders, especially, youth is one of possible strategies f...

The present study investigated the effects of different light intensities on the growth and the morphological characteristics of sweet basil (Ocimum basilicum), a medicinal herb used in the flavouring and pharmaceutical industries

The present study investigated the effects of different light intensities on the growth and the morphological characteristics of sweet basil (Ocimum basilicum), a medicinal herb used in the flavoring and pharmaceutical industries. The experiment was carried out in a completely randomized design with three replicates: including thirty plants in each...

Background: Chilli (Capsicum annuum) is an important herb used in traditional medicine and an essential ingredient in meals in Sri Lanka. Seed germination is a critical process affecting crop yield. Objectives: The current study investigated the effect of different light intensities on seed germination and early seedling development of C. annuum, c...

Background: The quality of light, controls and triggers several important functional and structural responses in plants. Recently, red and blue LED lights are used to increase the efficiency of crop production. Objectives: The current study investigated the effects of red and blue light on seed germination and seedling development of Chilli, a hi...

Music promotes or restricts the growth of plants (depending on the type of music). Present study was conducted to investigate the effect of music on the germination and shoot height of chili plants (Capsicum annuum L). To avoid errors, homogeneous seeds from the variety Galkiriyagama were obtained from Gannoruwa seed certification and plant protect...