Baradi WARYANI, Ghazala SIDDIQUI, Zarrien AYUB, Shaukat Hayat KHAN

Occurrence and temporal variation in the size-frequency distribution of 2 bloom-forming jellyfishes, Catostylus perezi (L. Agassiz, 1862) and Rhizostoma pulmo (Cuvier, 1800), in the Indus Delta along the coast of Sindh, Pakistan

Blooms of jellyfishes were studied at 3 sites, namely Bhanbore, Mirpur Sakro, and Keti Bunder. The sampling was carried out from April 2005 to March 2006. Only 2 species of jellyfish, Catostylus perezi and Rhizostoma pulmo, were found in samples. C. perezi was present at all 3 sampling sites, whereas R. pulmo was found only at Keti Bunder. Specimens of C. perezi appeared in the subsurface waters for a period of 6-8 months during April to August 2006 and February to March 2006. The smallest specimens of C. perezi appeared in January, and a gradual increase in size was observed in the population until August. The smallest specimens of R. pulmo were found in February, and their largest specimens occurred in July. The numeric abundance of medusae in zooplankton was also studied. They were more abundant at Mirpur Sakro, with a peak in December and January, while at Keti Bunder their highest number was noted in May. Their number at Bhanbore was comparatively lower than at the other 2 sites. No significant difference in physical oceanographic factors such as salinity, pH, dissolved oxygen, and suspended load of the sampling site was found, except for water temperature.

Anahtar Kelimeler:

Northern Arabian Sea, medusae, blooms

Occurrence and temporal variation in the size-frequency distribution of 2 bloom-forming jellyfishes, Catostylus perezi (L. Agassiz, 1862) and Rhizostoma pulmo (Cuvier, 1800), in the Indus Delta along the coast of Sindh, Pakistan

Keywords:

Northern Arabian Sea, medusae, blooms,

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Ahmed M (1999). Animal and plant communities of the present and former Indus Delta. In: Meadows A, Meadows PS, editors. The Indus River: Biodiversity, Resources, Humankind. Linnean Society of London. Karachi, Pakistan: Oxford University Press, pp. 12–30.
Ahmed M, Rizvi SHN (1980). Baseline Chemical and Bioecological Survey of Gharo, Phitti Creek System with a View to Monitor Pollution. First Annual Research Report, Port Qasim Pollution Study Research Project. Karachi, Pakistan: Institute of Marine Science, University of Karachi.
Amjad S, Khan ME, Hashmi MA, Shah AD, Ali-Khan TM (1995). Impact of monsoon reversal on zooplankton abundance and composition in the northwestern Arabian Sea. In: Thompson MF, Tirmizi NM, editors. The Arabian Sea Living Marine Resources and the Environment. Lahore, Pakistan: Vanguard Books Ltd., pp. 497–508.
Arai MN (2001). Pelagic coelenterates and eutrophication: a review. Hydrobiologia 45: 69–87.
Bamstedt U, Ishii H, Martinussen MB (1997). Is the scyphomedusa Cyanea capillata (L.) dependent on gelatinous prey for its early development? Sarsia 82: 269–229.
Brierley AS, Axelsen BE, Buecher E, Sparks CAJ, Boyer H, Gibbons MJ (2001). Acoustic observations of jellyfish in the Namibian Benguela. Mar Ecol Prog Ser 210: 55–66.
Brotz L, Cheung WWL, Kleisner K, Pakhomer E, Pauly D (2012). Increasing jellyfish populations: trends in large marine ecosystems. Hydrobiologia 690: 3–20.
Burnett JW (1996). Swarms of Chrysaora sp. off California. Jellyfish Sting Newsl 15: 5.
Condon RH, Duarteb CM, Pitt KA, Robinsona KL, Lucasf CH, Sutherland KR, Mianzanh HW, Bogeberga M, Purcell JE, Deckerj MB et al. (2013). Recurrent jellyfish blooms are a consequence of global oscillations. P Natl Acad Sci U S A 110: 1000–1005.
Custance DRN (1964). Light as an inhibitor of strobilation in Aurelia aurita. Nature 204: 1219–1220.
FAO (1975). Manual of Methods in Aquatic Environment Research: Part 1. Method of Detection Measurement and Monitoring of Water Pollution. FAO Fisheries Technical Paper No. 137. Rome, Italy: FAO.
Graham WM, Pagès F, Hamner WM (2001). A physical context for gelatinous zooplankton aggregations: a review. Hydrobiologia 451: 199–212.
Gul S, Morandini C (2013). New records of scyphomedusae from Pakistan coast: Catostylus perezi and Pelagia cf. noctiluca (Cnidaria: Scyphozoa). Marine Biodiversity Records 6: e86.
Kikinger R (1992). Cotylorhiza tuberculata (Cnidaria: Scyphozoa) life history of a stationary population. Mar Ecol 13: 333–362.
Kingsford MJ, Pitt KA (1998). Research on the Timing of Reproduction, Abundance, Stock Assessment and Genetics of the Edible Jellyfish Catostylus mosaicus in New South Wales Waters. Sydney, Australia: University of Sydney.
Kingsford MJ, Pitt KA, Gillanders BM (2000). Management of jellyfish fisheries with special reference to the order Rhizostomeae. Oceanogra Mar Biol Ann Rev 38: 85–156.
Kramp PL (1961). Synopsis of the medusae of the world. J Mar Biol Assoc UK 40: 1–569.
Kramp PL (1965). Some medusae (mainly scyphomedusae) from Australian coastal waters. Trans Royal Soc South Australia 89: 257–278.
Loeb MJ (1972). Strobilation in the Chesapeake Bay Sea nettle Chrysaora quinqecirrha. J Exp Zool 180: 279–292.
Martin VJ, Archer WE (1997). Stages of larval development and stem cell population changes during metamorphosis of a hydrozoan planula. Biol Bull 192: 41–52.
Mills CE (1995). Medusae, siphnophores and ctenophores as planktivorous predators in changing global ecosystem. ICES J Mar Sci 52: 575–581.
Mills CE (2001). Jellyfish blooms: are populations increasing globally in response to changing ocean conditions? Hydrobiologia 451: 55–68.
Muhammad F, Sultana R (2008). New record of edible jellyfish Rhizostoma pulmo (Cnidaria: Scyphozoa: Rhizostomitidae) from Pakistani waters. Marine Biodiversity Records 1: e67.
Newell GE, Newell RC (1963). Marine Plankton: A Practical Guide. London, UK: Hutchinsen & Co.
Olesen NJ, Purcell E, Stoecker DK (1996). Feeding and growth of ephyrae of scyphomedusae Chrysaora quinquecirrha. Mar Ecol Prog Ser 137: 149–159.
Paryar JR (2003). Jellyfish ya azaab. Newsletter of Fisher Folk 13–14: 24.
Pauly D, Christensen V, Dalsgaard J, Froese R, Torres R Jr (1998). Fishing down marine food webs. Science 279: 860–863.
Pitt KA (2000). Life history and settlement preferences of the edible jellyfish Catostylus mosaicus (Scyphozoa: Rhizostomeae). Mar Bio 136: 269–279.
Pitt KA, Kingsford MJ (2000). Geographic separation of stocks of the edible jellyfish Catostylus mosaicus (Rhizostomeae) in New South Wales, Australia. Mar Ecol Prog Ser 196: 143–155.
Purcell J, Malcj A, Benovoic A (1999). Potential links of jellyfish to eutrophication and fisheries. In: Malone TC, Malej A, Harding LW Jr, Smodlaka N, Turner R, editors. Ecosystems at the Land–Sea Margin: Drainage Basin to Coastal Sea. Coastal and Estuarine Studies No. 55. Washington, DC, USA: American Geophysical Union, pp. 241–264.
Purcell JE (2005). Climate effects on jellyfish populations. J Mar Biol Assoc UK 85: 461–476.
Purcell JE (2012). Jellyfish and ctenophore blooms coincide with human proliferations and environmental perturbations. Ann Rev Mar Sci 4: 209–235.
Purcell JE, Uye S, Lo WT (2007). Anthropogenic causes of jellyfish blooms and their direct consequences for humans: a review. Mar Eco Ser 350: 153–174.
Richardson AJ, Bakun A, Hays GC, Gibbons MJ (2009). The jellyfish joyride: causes, consequences and management responses to a more gelatinous future. Trends Ecol Evol 24: 312–322.
Rippingale RJ, Kelly SJ (1995). Reproduction and survival of Phyllorhiza punctata (Cnidaria: Rhizostomeae) in a seasonally fluctuating salinity regime in Western Australia. Mar Freshw Res 46: 1145–1151.
Rizvi SHN, Saleem M, Baquar J (1988). Steel mill effluents: influence on the Bakran Creek environment. In: Thompson MF, Tirmizi NM, editors.. The Arabian Sea: Living Marine Resources and the Environment. Washington, DC, USA: American Institute of Biological Sciences, pp. 549–569.
Santhanam R, Srinivasan A (1994). A Manual of Marine Zooplankton. New Delhi, India: Oxford & IBH Pub Co Pvt Ltd.
Strickland JDH, Parson TR (1972). A Practical Handbook of Seawater Analysis. Ottawa, Canada: Fisheries Research Board of Canada.
Tahera Q, Kazmi QB (2008). New records of two jellyfish medusae (Cnidaria: Scyphozoa: Catostylidae: Cubozoa: Chirodropidae) from Pakistani waters. Marine Biodiversity Records 1: e30.
Uye SI (2008). Blooms of the giant jellyŞsh Nemopilema nomurai: a threat to the Şsheries sustainability of the East Asian marginal seas. Plank Benthos Res 3 (Suppl.): 125–131.
Wickstead JH (1962). Food and feeding in pelagic copepods. P Zool Soc Lond 139: 545–555.
Xian WW, Kang B, Liu RY (2005). Jellyfish blooms in the Yangtze Estuary. Science 307: 41.
Zhang F, Sun S, Li CL (2009). Research advances in marine medusae ecology. Prog Nat Sci 19: 121–130.