pembentangan 18 : the mangrove gastropods of pulau besar
TRANSCRIPT
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THE MANGROVE GASTROPODS OF PULAU
BESAR, PULAU MERAMBONG AND TANJUNG TUAN
SINGH, H.R., NORASHIKIN, K.B., NURUL AKMAL, S.,
SHIRLIZA, A.S, & MOHD AZHAM, Y.
FACULTY OF APPLIED SCIENCES
UNIVERSITI TEKNOLOGI MARA (UITM), SHAH ALAM
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Tanjung Tuan
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2nd Link
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Tanjung Tuan (TT)
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TT Site 1
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TT Site 2
(Mangrove)
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TT Site 3 (Rocky
Shore)
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Tanjung Tuan Mangrove Erosion - Site 2
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Pulau Besar (PB)
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PB Site 2
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PB Site 3
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PB Site 4
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Tanjung Tuan Pulau Besar Pulau Merambong
Avicennia officinalis Avicennia alba Avicennia alba
Rhizopora apiculata* Avicennia officinalis Avicennia officinalis
Rhizophora mucronata Rhizophora apiculata* Bruguiera gymnorrhiza*
Rhizophora stylosa* Rhizophora mucronata* Bruguiera parviflora
Sonneratia alba Rhizophora stylosa* Excoecaria agalloca
Sonneratia ovata Sonneratia ovata Rhizophora apiculata
Rhizophora mucronata*
Sonneratia alba*
Mangrove tree taxa sampled from Tanjung Tuan, Pulau Besar and Pulau Merambong
(* abundant taxa)
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0
20
40
60
80
100
120
140
160
180
Me
an G
BH
(cm
)
Mangrove Tree Taxa
Tanjung Tuan Pulau Merambong
*
* at TT
* * *
Number of Mangrove Tree Taxa Sampled
Mangrove Tree Taxa Tanjung Tuan Pulau Merambong
A. alba 5
A. officinalis 4
B. gymnorrhyza 7 39
B. parviflora 3
R. apiculata 54 3
R. mucronata 3 41
S. alba 3 41
S. ovata 4
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Past Studies & Records on Gastropods
• Van Benthem Jutting (1949, 1950, 1952)
• Purchon & Enoch (1954)
• Tweedie (1961)
• Berry (1963, 1965)
• Sasekumar (1974)
• Purchon & Purchon (1981)
• Way & Purchon (1981)
• Morris & Purchon, 1981)
• Tan & Siggurdsson (1990, 1996)
• Wong et al. (2008)
• Wong & Aziz (2011)
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Family Gastropod Taxa Family Gastropod Taxa
Assimineidae Sphaerassiminea miniata Nassariidae Nassarius jacksonianus
Cerithiidae Cerithidium coralium Nassarius livescens
Clypeomorus batillariaeformis Nassarius olivaceus
Clypeomorus pellucidus Nassarius pullus
Columbellidae Columbella duclosiana Neritidae Clithon oualeniensis
Pyrene fulgurans Nerita albicilla
Ellobiidae Cassidula aurisfelis Nerita chameleon
Cassidula mustelina Nerita lineata
Ellobium aurisjudae Nerita planospira
Ellobium aurismidae Nerita polita
Laemodonta siamensis Nerita squamulata
Litorinidae Littoraria carinifera Nerita undata
Littoraria conica Neritina violacea
Littoraria melanostoma Planaxidae Planaxis sulcatus
Littoraria scabra Potamididae Cerithidea cingulata
Littoraria undulata Cerithidea obtusa
Littoraria vespacea Cerithidea quadrata
Nodilittorina vidua Telescopium mauritsi
Melonginidae Melongena pugilina Telescopium telescopium
Muricidae Chicoreus capucinus Terebralia sulcata
Drupa margariticola Trochidae Monodonta labio
Morula musiva
Thais echinulata
Thais gradata
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Gastropod Taxa Tanjung Tuan Pulau Besar
Pulau
Merambong Cassidula aurisfelis X X
Cassidula mustelina X
Cerithidea cingulata X X
Cerithidea obtusa X
Cerithidea quadrata X
Cerithidium coralium X X
Chicoreus capucinus X X X
Clithon oualeniensis X X
Clypeomorus batillariaeformis X X X
Clypeomorus pellucidus X X X
Collumbella duclosiana X X X
Drupa margariticola X X X
Ellobium aurisjudae X X
Ellobium aurismidae X
Laemodonta siamensis X
Littoraria carinifera X X
Littoraria conica X
Littoraria melanostoma X X X
Littoraria scabra X X X
Littoraria undulata X X
Littoraria vespacea X X X
Melongena pugilina X
Monodonta labio X X X
Morula musiva X X
Nassarius jacksonianus X X
Nassarius livescens X
Nassarius olivaceus X X
Nassarius pullus X
Nerita albicilla X
Nerita chameleon X X X
Nerita lineata X X X
Nerita planospira X X X
Nerita polita X X X
Nerita squamulata X X X
Nerita undata X X X
Neritina violacea X
Nodilittorina vidua X
Planaxis sulcatus X X X
Pyrene fulgurans X X X
Sphaerassiminea miniata X X
Telescopium mauritsi X
Telescopium telescopium X
Terebralia sulcata X
Thais echinulata X X X
Thais gradata X X
Total Number of Taxa 40 32 21
Distribution of Gastropod Taxa from Tanjung Tuan, Pulau Besar and Pulau Merambong
12 families comprising 23
genera encompassing 45 taxa
Purchon & Purchon (1981) –
301 taxa (52 families) from east
and west coast of P. Malaysia
(various habitats)
Aziz et al. (2001) – 48 taxa (15
families) from intertidal areas of
P. Redang
Zaidi et al. (2008) – 27 taxa (12
families) from the seagrass
beds of the Merambong Shoal
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20
40
60
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100
Me
an S
he
ll Le
ngt
h (
mm
)
Gastropod Taxa
Mean Shell Length of Gastropod Taxa Sampled from Tanjung Tuan, Pulau Besar and Pulau Merambong
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5
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45 M
ean
Sh
ell
Len
gth
(m
m)
Gastropod Taxa
Tanjung Tuan Pulau Besar Pulau Merambong
Gastropod taxa overlap from sampling locations and their sizes
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Location
Mean Density
(no/m2) n Dominant Gastropod Taxa
Tanjung Tuan 9.6 6278 Clypeomorus batillariaeformis
Clypeomorus pellucidus
Littoraria scabra
Nerita lineata
Nerita planospira
Sphaerassiminea miniata
Pulau Besar NA NA Clypeomorus pellucidus
Littoraria scabra
Nerita chameleon
Thais echinulata
Pulau Merambong 4.3 2273 Clypeomorus batillariaeformis
Littoraria scabra
Monodonta labio
Planaxis sulcatus
Nerita squamulata
Mean density and dominant gastropod taxa sampled from Tanjung Tuan,
Pulau Besar and Pulau Merambong
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0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5 D
en
sity
(n
o/m
2)
Gastropod Taxa
Pulau Merambong Tanjung Tuan
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2
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Rhizophora (Large area)
Rhizophora apiculata (Small
area)
Rhizophora stylosa (Rocky area)
Rhizophora stylosa (Island)
Sonneratia area
Gas
tro
po
d M
ean
De
nsi
ty (
no
/m2
)
Mangrove Sub Areas at Tanjung Tuan
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0
2
4
6
8
10
12
Rhizophora (Sandy) Sonneratia (Rocky) Rhizophora (Rocky) Bruguiera Area
Gas
tro
po
d M
ean
Den
sity
(n
o/m
2)
Mangrove Sub Areas at Pulau Merambong
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Cerithedea. obtusa
Cassidula aurisfelis
Chicoreus capucinus
Clypeomorus batillariaeformis
Clypeomorus pellucidus
Drupa margariticola
Elobium aurisjudae
Littoraria carinifera
Littoraria carinifera
Sampled gastropod taxa
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Littoraria melanostoma
Littoraria melanostoma Littoraria scabra
Littoraria vespacea
Littoraria vespacea Littoraria vespacea
Littoraria vespacea
Monodonta labio
Monodonta labio
Sampled gastropod taxa
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Nerita chameleon
Nerita squamulata Nassarius olivaceus
Nerita planospira
Nerita lineata
Nerita lineata
Nerita lineata
Nerita polita Nerita sp.
Nerita undata Nerita undata.
Sampled gastropod taxa
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Planaxis sulcatus.
Terebralia sulcata
Terebralia sulcata
Thais echinulata
Thais echinulata Thais echinulata
Sphaerassiminea miniata Sampled gastropod taxa
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Importance
• Least studied among marine animals
• Ecological Importance
– Fish Diets
– Hermit crabs
– Indicator species
– Mangrove cleaners
• Taxonomy (Synonyms?), Biology, Ecology is lacking. Function?
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Acknowledgements
• Jabatan Taman Laut Malaysia (JTLM) (Funding)
• University of Malaya (UM) (Coordination)
• Universiti Teknologi MARA (UiTM), Shah Alam
• Graduate Students, Faculty of Applied Sciences. UiTM