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Spatial and Temporal Variations in Strombus canarium (Gastropoda: Strombidae) Abundance at Merambong Seagrass Bed, Malaysia (Variasi Reruang dan Temporal bagi Kelimpahan Strombus canarium
(Gastropoda: Strombidae) di Hamparan Rumput Laut Merambong,
Malaysia)
ZAIDI CHE COB1*, AZIZ ARSHAD2, JAPAR SIDIK BUJANG3 &
MAZLAN
ABD
GHAFFAR1
1School of Environmental and Natural Resource
Sciences, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia
43600 Bangi, Selangor, Malaysia
2Department of Aquaculture, Faculty of
Agriculture, Universiti Putra Malaysia 43400 UPM Serdang, Selangor,
Malaysia
3Department of Biology, Faculty of Science, Universiti Putra
Malaysia 43400 UPM Serdang, Selangor, Malaysia
Diserahkan: 7 September 2012/Diterima: 15 Julai 2013
ABSTRACT
The abundance of marine benthic organisms
often exhibits distinct distributional patterns, which is generally
governed by many physical and biological factors specific to the
habitat. In this study, the spatial and temporal variations in abundance
of the dog conch, Strombus canarium
Linnaeus 1758, a commercially important marine gastropod, was
investigated. Assessment of conch abundance at Merambong seagrass
bed, Malaysia, was conducted using a transect belt method. Sampling
stations were randomly selected and environmental parameters associated
with the habitat were recorded. The species showed distinct spatial
distributional pattern. Conch densities were significantly higher
in sheltered areas, mainly in mixed seagrass bed dominated by
Halophila spp. and with high sediment organic content. The densities
were relatively very low in areas dominated by the tape seagrass,
Enhalus acoroides.
The species studied also showed distinct temporal variation in abundance.
The abundance value was seasonally varied with highest density recorded
during the wet monsoon season (p<0.05). The densities
were otherwise very low during the dry season, except for a slight
peak in July. Since the conch is a very important fishery species
within the Johor Straits and regulations on their harvesting is
still lacking, this information would be very important for their
sustainable management.
Keywords: Abundance; conch; density; population dynamics;
seagrass; Strombidae
ABSTRAK
Kelimpahan organisma bentik marin selalunya menunjukkan corak taburan tertentu, yang
umumnya dipengaruhi oleh faktor fizikal dan biologi khusus kepada
sesuatu habitat. Dalam kajian ini, variasi reruang dan temporal
bagi kelimpahan siput gonggong, Strombus canarium Linnaeus 1758, spesies
gastropod marin yang penting secara komersil, telah dikaji. Penilaian ke atas kelimpahan siput di hamparan rumput laut Merambong,
Malaysia, telah dijalankan melalui kaedah jalur transek.
Stesen kajian telah dipilih secara rawak dan parameter persekitaran
habitat direkodkan. Spesies yang dikaji
menunjukkan pola taburan reruang yang jelas. Kelimpahan
siput secara signifikannya lebih tinggi di kawasan yang terlindung,
terutamanya di hamparan rumput laut yang didominasi oleh Halophila
spp. dan dengan kandungan organik sedimen yang tinggi. Kepadatan
siput secara relatifnya lebih rendah di kawasan yang didominasi
oleh rumput laut jenis pita, Enhalus acoroides. Spesies yang dikaji juga menunjukkan variasi temporal yang jelas
dalam kelimpahannya. Nilai kelimpahan
didapati berbeza mengikut musim dengan nilai kepadatan tertinggi
direkodkan semasa musim hujan (p<0.05).
Kepadatan siput sebaliknya adalah lebih rendah semasa musim panas,
kecuali sedikit peningkatan pada bulan Julai. Memandangkan
siput gonggong adalah spesies perikanan yang penting di selat Johor
dan setakat ini tiada peraturan khusus dalam penangkapannya, maklumat
daripada kajian ini adalah sangat penting bagi pengurusan mapan
siput tersebut.
Kata kunci: Dinamik populasi; kelimpahan; kepadatan; rumput laut;
Strombidae; siput
RUJUKAN
Abbott, R.T. 1960. The
genus Strombus in the Indo-pacific. Indo- Pacific Mollusca 1(2):
33-144.
Alfaro, A.C. &
Carpenter, R.C. 1999. Physical and biological processes influencing zonation
patterns of a subtidal population of the marine snail, Astraea (Lithopoma)
undosa Wood 1828. Journal of Experimental Marine Biology & Ecology 240:
259-283.
Amini, S. 1986. Preliminary
study on gonggong (Strombus canarium) in Bintan waters Riau. Jurnal
Penelitian Perikanan Laut 36: 23-29.
Berg, C.J. Jr. 1975.
Behavior and ecology of conch (Superfamily Strombacea) on a deep subtidal algal
plain. Bulletin of Marine Science 25(3): 307-317.
Catterall, C.P. &
Poiner, I.R. 1983. Age- and sex-dependent patterns of aggregation in the
tropical gastropod Strombus luhuanus. Marine Biology 77: 171-182.
Cob, Z.C., Arshad, A.,
Bujang, J.S. & Mazlan, A.G. 2009. Age, growth, mortality and population
structure of Strombus canarium (Gastropoda: Strombidae): Variations in
male and female sub-populations. Journal of Applied Sciences 9(18): 3287-3297.
Cob, Z.C., Arshad, A.,
Bujang, J.S., Nurul Amin, S.M. & Mazlan, A.G. 2008. Growth, mortality,
recruitment and yield-per-recruit of Strombus canarium Linnaeus, 1758
(Mesogastropoda: Strombidae) from the West Johor Straits, Malaysia. Research
Journal of Fisheries and Hydrobiology 3(2): 71-77.
Connell, J.H. 1983. On the
prevalence and relative importance of interspecific competition: Evidence from
field experiments. American Naturalist 122: 661–696.
Erlambang, T. &
Siregar, Y.I. 1995. Ecological aspects and marketing of dog conch Strombus
canarium Linne, 1758 at Bintan Island, Sumatra, Indonesia. Special
Publication Phuket Marine Biological Center 15: 129-131.
Erlambang, T. 1996. Some
biology and ecology aspects of dog conch (Strombus canarium) based on a
year round study in Riau province, Indonesia. Journal Xiamen Fishery College 18(1): 33-41.
Heip, C. 1975. On the
significance of aggregation in some benthic marine invertebrates. In Proc. 9th Eur.
Mar. Biol. Symp., edited by Barnes, H. Aberdeen: Aberdeen University Press.
pp. 527-538.
Hesse, K.O. 1979. Movement
and migration of the queen conch, Strombus gigas, in the Turks and
Caicos Islands. Bulletin of Marine Science 29(3): 303-311.
Japar Sidik, B. & Muta
Harah, Z. 2003. The seagrasses of Malaysia. In World Atlas of Seagrasses, edited
by Green E.P. & Short, F.T. UNEP World Conservation Monitoring Center,
Berkeley, USA: University Of California Press. pp. 152-160.
Japar Sidik, B., Arshad,
A., Hishamuddin, O., Muta Harah, Z. & Misni, S. 1996. Seagrass and
macroalgal communities of Sungai Pulai estuary, south-west Johor, Peninsular
Malaysia. In Seagrass Biology: Scientific Discussion from an International
Workshop, Rottnest Island, Western Australia, edited by Kuo, J., Walker,
D.I. & Kirkman, H. Perth: University of Western Australia. pp. 3-12.
Kuwamura, T., Fukao, R.,
Nishida, M., Wada, K. & Yanagisawa, Y. 1983. Reproductive biology of the
gastropod Strombus luhuanus (Strombidae). Publication Seto Marine
Biological Laboratory 28(5-6): 433-443.
Lauranceau, N. 2001. A
propos du complexe Strombus canarium: Laevistrombus de Nha Trang
(Vietnam). Xenophora 95: 30- 33.
Libutaque, J.S. 2000.
Studies on the reproductive cycle of the dog conch Strombus canarium (Gastropoda:
Strombidae) in Miag-ao, Iloilo. UPV Journal of Natural Sciences 5(2):
1-16.
Morton, B. & Blackmore,
G. 2001. South China Sea. Marine Pollution Bulletin 42(12): 1236-1263.
Navarrete, S.A. 1996.
Variable predation: Effects of whelks on a mid-intertidal successional community. Ecological Monograph 66: 301-321.
Percharde, P.L. 1970.
Further underwater observations on the molluscan genus Strombus Linne as
found in the waters of Trinidad and Tobago. Caribbean Journal of Science 10(1-
2): 73-81.
Poiner, I.R. &
Catterall, C.P. 1988. The effects of traditional gathering on populations of
the marine gastropod Strombus luhuanus Linne 1758, in southern Papua New
Guinea. Oecologia 76: 191-199.
Poiner, I.R. 1977.
Microvariation in the fauna of a sublittoral sandbank, Moreton Bay, Queensland. Australian Journal of Ecology 2: 297-308.
Randall, J.E. 1964b.
Contributions to the biology of the queen conch, Strombus gigas. Bulletin
of Marine Science 14(2): 246-295.
Scheibling, R.E. 1980. Homing
movements of Oreaster reticulatus (L.) (Echinodermata:
Asteroidea) when experimentally translocated from a sand patch habitat.
Marine Behavior & Physiology 7: 225-232. Stoner, A.W. &
Ray-Culp, M. 2000. Evidence for Allee effects in an over-harvested marine
gastropod: Density-dependent mating and egg production. Marine Ecology
Progress Series 202: 297-302.
Stoner, A.W. & Ray, M.
1993. Aggregation dynamics in juvenile queen conch (Strombus gigas):
Population structure, mortality, growth, and migration. Marine Biology 116:
571-582.
Stoner, A.W., Sandt, V.J.
& Boidron-Metairon, I.F. 1992. Seasonality in reproductive activity and
larval abundance of queen conch Strombus gigas. Fisheries Bulletin 90(1):
161-170.
Stoner, A.W. & Waite,
J.M. 1991. Trophic biology of Strombus gigas in nursery habitats: Diets
and food sources in seagrass meadows. Journal of Molluscan Studies 57:
451-460.
Sudtongkong, C. &
Intacharoen, P. 2011. Density survey of the dog conch (Strombus canarium Linnaeus,
1758) in Sikao bay, southern Thailand: Evaluating the effectiveness of community-based
management. Current Development in Oceanography 2(2): 125-135.
Underwood, A.J. & Petraitis, P.S. 1993. Structure of
intertidal assemblages in different locations: How can local processes be
compared. In Species Diversity in Ecological Communities: Historical and
Geographical Perspectives, edited by Ricklefs, R.E. & Schluter, D.
Chicago, Illinois: University of Chicago Press. pp. 39-51.
Wada, K., Fukao, R., Kawamura, T., Nishida,
M. & Yanagisawa, Y. 1983. Distribution and growth of the gastropod Strombus
luhuanus at Shirahama, Japan. Publication of Seto Marine Biological
Laboratory 28(5-6): 417-432.
*Pengarang untuk surat-menyurat; email: zdcc@ukm.my
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