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Chandani Appadoo
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Journal : JOURNAL OF COASTAL DEVELOPMENT

 1 
A PILOT STUDY FOR THE ESTIMATION OF ABOVE GROUND BIOMASS AND LITTER PRODUCTION IN Rhizophora mucronata DOMINATED MANGROVE ECOSYSTEMS IN THE ISLAND Of MAURITIUS Shafiiq Abib; Chandani Appadoo
JOURNAL OF COASTAL DEVELOPMENT Vol 16, No 1 (2012): Volume 16, Number 1, Year 2012
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Estimation of the above ground biomass of mangroves is an important issue because of its relevance to nutrient turnover and the potential to store carbon. Productivity, as indicated by litter fall rates is important to determine the rate at which mangroves produce new biomass. The aim of the current study was to estimate the above ground biomass and quantify litter fall in two Rhizophora mucronata dominated mangrove ecosystems of Mauritius located at Trou D’eau Douce (eastern side), and  at Petite Riviere Noire on the (western side) of the island. Field studies were conducted from September 2011 to January 2012. Quadrats of 5 × 5 metres were set up in each site and 200 mature trees were surveyed. Sixteen litter traps were constructed and installed at the two sites for litter collection. To estimate the above ground biomass, allometric equations were used. The total above ground biomass for Trou D’eau Douce and Petite Riviere Noire were 26.96 t ha-1 and 16.63 t ha-1, respectively. The mean rate of litter fall for Trou D’eau Douce and Petite Riviere Noire were 3.2 ± 0.44 g DW m-2 day-1 and 4.07± 0.95 g DW m-2 day-1, respectively. This study is among the first to provide information on the estimation of above ground biomass for mangroves of Mauritius. It is also the first to provide data on the litter production in mangroves at Petite Riviere Noire and Trou D’eau Douce.
EFFECTS OF TEMPERATURE, SALINITY AND FEED ON THE SURVIVAL AND GROWTH OF JUVENILE SEA CUCUMBER, Bohadschia marmorata MJ Chu Yuan Kee; Chandani Appadoo
JOURNAL OF COASTAL DEVELOPMENT Vol 11, No 1 (2007): Volume 11, Number 1, Year 2007
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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The survival and growth of tropical sea cucumber, Bohadschia marmorata (Jaeger) was investigated Juvenile B, marmorata were collected in the wild from La Prairie, in the south west coast of Mauritius and was reared at Albion Fisheries Research Centre (AF RC). The sea cucumbers were stacked at a density of six individuals per tank in three separate experiments: temperature (26, 28 and 32”C), salinity (25, 30 and 36%a) and feed (macro algal paste and a mixture of macro algal paste supplemented with /5% powdered fish fee¢0. During temperature and salinity treatments, B. marmorata were fed with a macro algal paste anlv. Temperature and salinity treatments were monitored for 63 days and ked experiment for 35 days. B. marmorata showed a negative growth in all salinity and temperature treatments. Survival of B. marmorata was 9l.67 and 66.65% in temperature 28 and 32”C, respective. All B. marmorata survived at temperature 26 DC and had a specyic growth rate of ~0. 78% day". The specyic growth rate of B. marmorata at temperature 28"C and 32"C was —I. 03% day" and -/,23% day" respectivelv. B. marmorata displayed /00% survival rate at salinities 25 and 36%.;. and 9/.67% at salinity 30964; Specific growth rates of B. marmorata showed a descending trend in the order of salinity 25%.1 (·/.07% day") >30%a (-/.05 % day`,) >36%a (-0. 78 % day`!). Better growth was obtained when B. marmorata were fed with a mixture of algae and fish feed (0.3/% day"), as compared with ajeed containing pure algal paste only (-l.34%day"}. This study provides some indications on the rearing conditions for B. marmorata, but more studies are needed for rnariculture purposes.
A PRELIMINARY STUDY ON BENTHIC AND ARBOREAL FAUNA ASSOCIATED WITH MANGROVE Rhizophora Mucronata ON THE EAST COAST OF MAURITIUS (INDIAN OCEAN) WITH SPECIAL REFERENCE TO THE MOLLUSCA Chandani Appadoo; Nabiihah B. Roomaldawo
JOURNAL OF COASTAL DEVELOPMENT Vol 8, No 2 (2005): Volume 8, Number 2, Year 2005
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Mangrove ecosystems are important as they harbour a diversity of life forms. This study aimed at studying the benthic and arboreal macrofaunal diversity and abundance associated with three naturally occurring mangrove forests of Mauritius, Western Indian Ocean. The mangrove areas included Roches Noires, Mahebourg and Pointe Maurice, on the east coast of the island. The field study was carried out at low tide during summer season from October 2003 to February 2004.  At each of the three sites, the arboreal and benthic macrofauna were sampled separately, using quadrats of 1 m x 1 m and 25 cm x 25 cm, respectively.  Sixty-four benthic and 42 arboreal quadrats were collected from Roche Noires, 40 benthic and 41 arboreal quadrats at Mahebourg and 40 benthic and 30 arboreal quadrats at Pointe Maurice. The results showed that benthic habitat is more diverse with regards to molluscan families (24 families) than the arboreal habitat (5 families). Pointe Maurice has a more diverse benthic fauna.  Relative percentage abundance and mean density of molluscan families are reported. Highest mean densities and relative abundance were recorded for the Family Littorinidae among arboreal macrofauna.  In benthic macrofauna, the highest mean densities and relative abundance were noted in Family Cerithiidae at Roches Noires and Mahebourg.
A STUDY ON ASSEMBLAGE OF INVERTEBRATES INHABITING ROCKY SHORES WITHIN THE PORT- LIMIT OF PORT- LOUIS, MAURITIUS Julia Charles; Chandani Appadoo; Asha Poonyth Poonyth
JOURNAL OF COASTAL DEVELOPMENT Vol 14, No 2 (2011): Volume 14, Number. 2, Year 2011
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Rocky shores provide an important habitat for marine organisms. This study aimed at providing baseline data on assemblage of organisms on rocky shores within the port-limit of Port-Louis, Mauritius. Four rocky shores, with three at Pointe aux Sables (La Pointe1, La Pointe2, and Petit Verger) and one at Baie du Tombeau were studied from October 2007 to February 2008. On each site three stations, located at intervals of 2m, with an area of 40m2 each were set up. Intertidal organisms were hand-collected within forty-eight, 1m2 quadrat for invertebrates. Observations of 16,061 specimens led to identification of 30 faunal species belonging mostly to phyla Mollusca and Arthropoda. Mean total abundance of invertebrates per 1m2 varied from 729.22±173.07 at la Pointe2 to 143.97±11.43 at Baie du Tombeau. The gastropod, Planaxis sulcatus was the most abundant species at La Pointe1 and Petit Verger with mean abundance of 196.86±179.71 and 168.10±113.44 per 1m2 respectively. The bivalve, Modiolus auriculatus was the dominant species with mean abundance of 673.33±762.04 per 1m2 at La Pointe2 and Nerita punctata was most abundant (39.41±57.35 per 1m2) at Baie du Tombeau. Lowest Shannon diversity was observed La Pointe 2. The study is useful for future work on port area.
Co-Authors Asha Poonyth Poonyth Julia Charles MJ Chu Yuan Kee Nabiihah B. Roomaldawo Shafiiq Abib