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Infrapopulations of Sclerocollum saudii Al-Jahdali, 2010 (Acanthocephala: Cavisomidae) in the rabbitfish Siganus rivulatus (Teleostei, Siganidae) from the Saudi coast of the Red Sea

Published online by Cambridge University Press:  14 March 2011

M.O. Al-Jahdali  and
R.M. El-Said Hassanine
M.O. Al-Jahdali*
Affiliation:
Biological Sciences Department, Rabigh-Faculty of Science and Arts, King Abdulaziz University, PO Box 344, Rabigh21911, Saudi Arabia
R.M. El-Said Hassanine
Affiliation:
Biological Sciences Department, Rabigh-Faculty of Science and Arts, King Abdulaziz University, PO Box 344, Rabigh21911, Saudi Arabia
*
*E-mail: Maljahdalii@yahoo.com
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Abstract

In infrapopulations of helminth parasites, density-dependent effects, through some form of intra- and interspecific competition, play an important role in shaping and regulating the infrapopulations. The mechanisms responsible for these processes have often been observed in laboratory studies and rarely studied under natural conditions. Here, 24 natural infrapopulations (77–447 individuals) of the acanthocephalan Sclerocollum saudii Al-Jahdali, 2010 from the fish Siganus rivulatus consisted of cystacanths, newly excysted juveniles, immature and mature worms, distributed in a well-defined fundamental niche (anterior 60% of the intestine). Each of these stages exhibited a significantly different longitudinal distribution within this niche. In small infrapopulations, cystacanths and newly excysted juveniles were found in the sixth 10% of the intestine, immature worms in the fifth 10% and mature worms in the anterior 40% of the intestine. However, their proportions followed a clear ascending order in each infrapopulation, and the female–male ratios of both immature and mature worms were distinctly female-biased. In large infrapopulations, mature worms existed partially in the site of immature ones, where a differential mortality among immature females was constantly observed. However, the proportions of immature worms increased significantly and those of mature worms decreased significantly, the mean lengths of immature and mature females decreased dramatically and the female–male ratios were distinctly male-biased. The mean sizes of immature and mature males seemed stable through all infrapopulations. The distribution of mature males and females suggests intense male–male competition for access to females, and reveals that larger females are copulated prior to the smaller ones. The results are statistically significant and suggest that infrapopulation self-regulation is through density-dependent mechanisms, in which immature females may play a key role.

Type
Research Papers
Information
Journal of Helminthology , Volume 86 , Issue 1 , March 2012 , pp. 85 - 94
Copyright
Copyright © Cambridge University Press 2011

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References

Abele, L.G. & Gilchrist, S. (1977) Homosexual rape and sexual selection in acanthocephalan worms. Science 197, 81–83.CrossRefGoogle ScholarPubMed
Al-Jahdali, M.O. (2010) Helminth parasites from Red Sea fishes: Neowardula brayi gen. nov., sp. nov. (Trematoda: Mesometridae Poche, 1926) and Sclerocollum saudii sp. nov. (Acanthocephala: Cavisomidae Meyer, 1932). Zootaxa 2681, 57–65.CrossRefGoogle Scholar
Amin, O.M. (1986) Hosts and geographical distribution of Acanthocephalus (Acanthocephala: Echinorhynchidae) from North American freshwater fishes, with a discussion of species relationships. Proceedings of the Helminthological Society of Washington 51, 210–220.Google Scholar
Andersson, M. (1994) Sexual selection. 2nd edn.624 pp. Princeton, NJ, USA, Princeton University Press.CrossRefGoogle Scholar
Awachie, J.B.E. (1966) The development and life history of Echinorhynchus truttae Schrank, 1788 (Acanthocephala). Journal of Helminthology 40, 11–32.CrossRefGoogle ScholarPubMed
Brattey, J. (1988) Life history and population biology of adult Acanthocephalus lucii (Acanthocephala: Echinorhynchidae). Journal of Parasitology 74, 72–80.Google Scholar
Brown, A.F. (1986) Evidence for density-dependent establishment and survival of Pomphorhynchus laevis (Müller, 1776) (Acanthocephala) in laboratory-infected Salmo gairdneri Richardson and its bearing on wild populations in Leuciscus cephalus (L.). Journal of Fish Biology 28, 659–669.CrossRefGoogle Scholar
Bush, A.O., Lafferty, K.D., Lotz, J.M. & Shostak, A.W. (1997) Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology 83, 575–583.CrossRefGoogle Scholar
Crompton, D.W.T. (1970) An ecological approach to acanthocephalan physiology. 2nd edn.132 pp. Cambridge, Cambridge University Press.Google Scholar
Crompton, D.W.T. (1973) The sites occupied by some parasitic helminthes in the alimentary tract of vertebrates. Biological Reviews 48, 27–83.CrossRefGoogle ScholarPubMed
Crompton, D.W.T. (1974) Experiment on insemination in Moniliformis dubius (Acanthocephala). Parasitology 68, 229–238.Google Scholar
Crompton, D.W.T. (1985) Reproduction. pp. 213–272in Crompton, D.W.T. & Nickol, B.B. (Eds) Biology of the Acanthocephala. Cambridge, Cambridge University Press.Google Scholar
Crompton, D.W.T., Keymer, A.E. & Arnold, S.E. (1984) Investigating over-dispersion: Moniliformis (Acanthocephala) and rats. Parasitology 88, 317–331.CrossRefGoogle ScholarPubMed
Dezfuli, B.S., Volponi, S., Beltrami, I. & Poulin, R. (2002) Intra- and interspecific density-dependent effects on growth in helminth parasites of the cormorant, Phalacrocorax carbo sinensis. Parasitology 124, 537–544.CrossRefGoogle ScholarPubMed
Froese, R. & Pauly, D. (2004/2009) FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2009 (accessed June 2009).Google Scholar
Ghiselin, M.T. (1974) The economy of nature and the evolution of sex. 2nd edn.346 pp. California, University of California Press, Berkeley, CA.Google Scholar
Graff, D.J. & Kitzman, W.B. (1965) Factors influencing the activation of acanthocephalan cystacanths. Journal of Parasitology 51, 424–429.CrossRefGoogle ScholarPubMed
Hassanine, R.M. & Al-Jahdali, M.O. (2007) Ecological comments on the intestinal helminths of the rabbitfish Siganus rivulatus (Teleostei, Siganidae) from the northern Red Sea. Acta Parasitologica 52, 278–285.CrossRefGoogle Scholar
Hassanine, R.M. & Al-Jahdali, M.O. (2008) Intraspecific density-dependent effects on growth and fecundity of Diplosentis nudus (Harada, 1938) Pichelin et Cribb, 2001 (Acanthocephala: Cavisomidae). Acta Parasitologica 53, 289–295.CrossRefGoogle Scholar
Kennedy, C.R. (1972) The effects of temperature and other factors upon the establishment and survival of Pomphorhynchus laevis (Acanthocephala) in goldfish, Carassius auratus. Parasitology 65, 283–294.CrossRefGoogle ScholarPubMed
Kennedy, C.R. (1984) The status of flounders, Platichthys flesus L., as hosts of the acanthocephalan Pomphorhynchus laevis (Muller) and its survival in marine conditions. Journal of Fish Biology 24, 135–149.CrossRefGoogle Scholar
Kennedy, C.R. (2006) Ecology of the Acanthocephala. 1st edn.249 pp. Cambridge, Cambridge University Press.Google Scholar
Kennedy, C.R. & Lord, D. (1982) Habitat specificity of the acanthocephalan Acanthocephalus clavula (Dujardin, 1845) in eels Anguilla anguilla (L). Journal of Helminthology 56, 121–129.Google Scholar
Kennedy, C.R., Broughton, P.F. & Hine, P.M. (1976) The sites occupied by the acanthocephalan Pomphorhynchus laevis in the alimentary canal of fish. Parasitology 72, 195–206.CrossRefGoogle ScholarPubMed
Kennedy, C.R., Broughton, P.F. & Hine, P.M. (1978) The status of brown trout and rainbow trout Salmo trutta and Salmo gairdneri as hosts of the acanthocephalan Pomphorhynchus laevis. Journal of Fish Biology 13, 265–275.Google Scholar
Keymer, A.E. (1982) Density-dependent mechanisms in the regulation of intestinal helminth populations. Parasitology 84, 573–587.CrossRefGoogle ScholarPubMed
Khanna, D.R. (2004) Biology of helminthes. 1st edn.456 pp. USA, Discovery Publishing House.Google Scholar
Lackie, A.M. (1974) The activation of cystacanths of Polymorphus minutus (Acanthocephala) in vitro. Parasitology 68, 135–146.CrossRefGoogle ScholarPubMed
Lawlor, B.J., Read, A.F., Keymer, A.E., Parveen, G. & Crompton, D.W.T. (1990) Non-random mating in a parasitic worm: mate choice by males? Animal Behaviour 40, 870–876.Google Scholar
May, R.M. & Woolhouse, M.E.J. (1993) Biased sex-ratios and parasite mating probabilities. Parasitology 107, 287–295.CrossRefGoogle ScholarPubMed
Parshad, V.R. & Crompton, D.W.T. (1981) Aspects of acanthocephalan reproduction. Advances in Parasitology 19, 73–138.CrossRefGoogle ScholarPubMed
Petrochenko, V.I. (1956) Acanthocephala of domestic and wild animals. Vol. 1, 465 pp. Moscow, Zdatel'stvo Akademii Nauk SSSR.Google Scholar
Poulin, R. (1997a) Population abundance and sex ratio in dioecious helminth parasites. Oecologia 111, 375–380.CrossRefGoogle ScholarPubMed
Poulin, R. (1997b) Covariation of sexual size dimorphism and adult sex ratio in parasitic nematodes. Biological Journal of the Linnean Society 62, 567–580.CrossRefGoogle Scholar
Poulin, R. (2001) Interactions between species and the structure of helminth communities. Parasitology 122, S3–S11.CrossRefGoogle ScholarPubMed
Poulin, R. (2006) Evolutionary ecology of parasites. 2nd edn.332 pp. Princeton, Princeton University Press.Google Scholar
Poulin, R., Giari, L., Simoni, E. & Dezfuli, B.S. (2003) Effects of conspecifics and heterospecifics on individual worm mass in four helminth species parasitic in fish. Parasitology Research 90, 143–147.CrossRefGoogle ScholarPubMed
Randall, J.E. (1983) Red Sea reef fishes. 2nd edn.192 pp. London, IMMEL Publishing.Google Scholar
Richards, D.T. & Lewis, J.W. (2001) Fecundity and egg output by Toxocara canis in the red fox, Vulpes vulpes. Journal of Helminthology 75, 157–164.Google ScholarPubMed
Richardson, D.J., Martens, J.K. & Nickol, B.B. (1997) Copulation and sexual congress of Leptorhynchoides thecatus (Acanthocephala). Journal of Parasitology 83, 542–543.CrossRefGoogle ScholarPubMed
Sasal, P., Jobet, E., Faliex, E. & Morand, S. (2000) Sexual competition in an acanthocephalan parasite of fish. Parasitology 120, 65–69.Google Scholar
Shostak, A.W. & Scott, M.E. (1993) Detection of density-dependent growth and fecundity of helminthes in natural infections. Parasitology 106, 527–539.CrossRefGoogle ScholarPubMed
Sinisalo, T., Poulin, R., Högmander, H., Juuti, T. & Valtonen, E.T. (2004) The impact of sexual selection on Corynosoma magdaleni (Acanthocephala) infrapopulations in Saimaa ringed seals (Phoca hispida saimensis). Parasitology 128, 179–185.CrossRefGoogle ScholarPubMed
Szalai, A.J. & Dick, T.A. (1989) Differences in numbers and inequalities in mass and fecundity during the egg-producing period for Raphidascaris acus (Nematoda: Anisakidae). Parasitology 98, 483–489.Google Scholar
Taraschewski, H. (2000) Host–parasite relationships in the Acanthocephala. A morphological approach. Advances in Parasitology 46, 1–179.CrossRefGoogle ScholarPubMed
Uznanski, R.L. & Nickol, B.B. (1982) Site selection, growth, and survival of Leptorhynchoides thecatus (Acanthocephala) during the prepatent period in Lepomis cyanellus. Journal of Parasitology 68, 686–690.CrossRefGoogle Scholar
Valtonen, E.T. (1983) On the ecology of Echinorhynchus salmonis and two Corynosoma species (Acanthocephala) in the fish and seals. Acta Universitatis Ouluensis, Ser. A, 156, Biologica 22, 48.Google Scholar
West Eberhard, M.J. (1983) Sexual selection, social competition, and speciation. Quarterly Review of Biology 58, 155–183.Google Scholar
Whitfield, P.J. (1970) The egg sorting function of the uterine bell of Polymorphus minutus (Acanthocephala). Parasitology 61, 111–126.CrossRefGoogle Scholar