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Agonistic behaviour and shoal composition of juvenile Diplodus sargus: first field observations

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Abstract

Behavioural observations of juvenile Diplodus sargus in natural habitats were conducted to test whether agonistic interactions occur in natural circumstances and, if they do, in which context they happen. The level of aggression and the shoals composition were also compared between distinct natural habitats. Behavioural observations were also conducted in captivity, and the level of aggression was compared with the level recorded in natural conditions to investigate which factors may promote aggressive behaviours. The observations were performed at two sites in the Atlantic Portuguese shore: São Pedro do Estoril (38°41′N, 9°22′W) and Cabo Raso (38°42′N, 9°29′W) from early July to late August 2010 and from late July to early October 2011, respectively. In nature agonistic behaviours do occur, with a higher frequency in pools than in open areas. However, even the highest values observed in nature are significantly lower than those reported for captive conditions. Shoal composition also changed in different habitats, with more members and aggregates more compact in open areas. We suggested that the high levels of aggression observed in captive groups may be an artefact caused by very high densities in confined spaces and eventually by the accumulation of chemicals that are known to be released by stressed fish and can be detected by other conspecifics. The confinement imposed in captivity may also affect shoal composition limiting the number of members and inter-individual distances in each group.

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References

  • Bailey KM (1994) Predation on juvenile flatfish and recruitment variability. Netherlands J Sea Res 32:175–189

    Article  Google Scholar 

  • Breitburg DL, Palmer MA, Loher T (1995) Larval distribution and the spatial patterns of settlement of an oyster reef fish: responses to flow and structure. Mar Ecol Prog Ser 125:45–60

    Article  Google Scholar 

  • Caballero C, Castro JJ (1999) Effect of residence and size asymmetries upon the agonistic interactions between juvenile white-seabream (Diplodus sargus cadenati de la Paz, Bauchot and Daget, 1974). Aggress Behav 25:297–303

    Article  Google Scholar 

  • Caballero C, Castro-Hdez JJ (2003) Effect of competitor density on the aggressiveness of juvenile white seabream (Diplodus sargus cadenati de la Paz, Bauchot and Daget, 1974). Aggress Behav 29:279–284

    Article  Google Scholar 

  • Castro J, Caballero C (1998) Dominance Structure in Small Groups of Juvenile White-Seabream (Diplodus sargus cadenati de la Paz, Bauchot and Daget 1974). Aggress Behav 24:197–204

    Article  Google Scholar 

  • Castro JJ, Santiago JA (1998) The influence of food distribution on the aggressive behaviour of juvenile white seabream (Diplodus sargus cadenati de la Paz, Bauchot and Daget, 1974). Aggress Behav 24:379–384

    Article  Google Scholar 

  • Eggleston DB (1995) Recruitment in Nassau grouper Epinephelus striatus: post-settlement abundance, microhabitat features, and ontogenetic habitat shifts. Mar Ecol Prog Ser 124:9–22

    Article  Google Scholar 

  • Garcia-Rubies A, Macpherson E (1995) Substrate use and temporal pattern of recruitment in juvenile fishes of the Mediterranean littoral. Mar Biol 124:35–42

    Article  Google Scholar 

  • Gibson RN (1968) The agonistic behaviour of juvenile Blennius pholis L. (Teleostei). Behaviour 30:192–217

    Article  Google Scholar 

  • Gonçalves AR, de Sousa LC, Almada VC (2012) Dominance and growth of Diplodus sargus (Pisces: Sparidae) in small captive groups. Appl Anim Behav Sci 137:96–100

    Article  Google Scholar 

  • Harmelin-Vivien ML, Harmelin JG, Leboulleux V (1995) Microhabitat requirements for settlement of juvenile sparid fishes on Mediterranean rocky shores. Hydrobiologia 300(301):309–320

    Article  Google Scholar 

  • Jones GP (1988) Experimental evaluation of the effects of habitat structure and competitive interactions on the juveniles of two coral reef fishes. J Exp Mar Biol Ecol 123:115–126

    Article  Google Scholar 

  • Karakatsouli N, Papoutsoglou SE, Manolessos G (2007) Combined effects of rearing density and tank colour on the growth and welfare of juvenile white seabream Diplodus sargus L. in a recirculating water system. Aquac Res 38:1152–1160

    Article  Google Scholar 

  • Macpherson E (1998) Ontogenetic shifts in habitat use and aggregation in juvenile sparid fishes. J Exp Mar Biol Ecol 220:127–150

    Article  Google Scholar 

  • Martin P, Bateson P (1993) Measuring Behaviour. An Introductory Guide, 2nd edn. Cambridge University Press, Cambridge

    Book  Google Scholar 

  • Olivotto I, Mosconi G, Maradonna F, Cardinali M, Carnevali O (2002) Diplodus sargus interrenal–pituitary response: chemical communication in stressed fish. Gen Comp Endocrinol 127:66–70

    Article  CAS  PubMed  Google Scholar 

  • Papoutsoglou SE, Karakatsouli N, Pizzonia G, Dalla C, Polissidis A et al (2006) Effects of rearing density on growth, brain neurotransmitters and liver fatty acid composition of juvenile white sea bream Diplodus sargus L. Aquac Res 37:87–95

    Article  CAS  Google Scholar 

  • Perreault HAN, Semsar K, Godwin J (2003) Fluoxetine treatment decreases territorial aggression in a coral reef fish. Physiol Behav 79:719–724

    Article  CAS  PubMed  Google Scholar 

  • Seghers BH (1981) Facultative schooling behavior in the spottail shiner (Notropis hudsonius): possible costs and benefits. Env Biol Fish 6:21–24

    Article  Google Scholar 

  • Shulman MJ (1985) Recruitment of coral reef fishes: effects of distribution of predators and shelter. Ecology 66:1056–1066

    Article  Google Scholar 

  • Tupper M, Boutilier RG (1995) Effects of conspecific density on settlement, growth and post-settlement survival of a temperate reef fish. J Exp Mar Biol Ecol 191:209–222

    Article  Google Scholar 

Download references

Acknowledgments

This research was financially supported by Fundação para a Ciência e Tecnologia with a PhD research grant given to A. R. Gonçalves (SFRH/BD/42226/2007) and through the pluriannual scheming fund attributed to Unidade de Investigação em Eco-Etologia (#331/94). The authors are grateful to E. Macpherson and P. Coelho for its assistance during data collection. The authors thank C. Santos, A. Levy and S. Francisco for their comments on the manuscript. The works described were conducted in accordance to national legal standards on protection of animals used for experimental purposes.

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Correspondence to Ana R. Gonçalves.

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Gonçalves, A.R., Silva, M.F., Vendrell, C.L. et al. Agonistic behaviour and shoal composition of juvenile Diplodus sargus: first field observations. Environ Biol Fish 98, 1015–1021 (2015). https://doi.org/10.1007/s10641-014-0334-8

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  • DOI: https://doi.org/10.1007/s10641-014-0334-8

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