title: Metazoan ectoparasites of Atlantic mackerel, Scomber scombrus (Teleostei: Scombridae): macro- and microhabitat distribution.
abstract: Parasites are affected by the environment where their hosts live, having a specific distribution among their hosts and occupying a well-defined microhabitat. The present work aims to describe the metazoan ectoparasite fauna of Scomber scombrus, namely its distribution at the macro- and microhabitat levels. For that, fish from two different Portuguese regions, Matosinhos (n = 40) and Figueira da Foz (n = 39), were examined for macroectoparasites. S. scombrus of Matosinhos presented four different parasite species, whilst fish from Figueira da Foz presented five species. All parasites belonged to Monogenea, Copepoda, or Isopoda. The main differences between infection levels of fish from the two localities were found in Grubea cochlear (higher infection levels in Matosinhos) and Caligus pelamydis (where the highest values were found in Figueira da Foz). Regarding the microhabitat of the reported ectoparasites, it could be seen that every species has a very specific distribution within the host: G. cochlear and Kuhnia scombri have a preference for the inner medial areas of gills, Kuhnia sprostonae for the pseudobranchs, and C. pelamydis for the internal wall of opercula. The numerical and functional responses to interspecific competition were absent. These results support the idea that the parasite driving forces of community structure are the reinforcement of reproductive barriers and the enhancement of chances to mate.
authors.affiliation: CIMAR-Laboratório Associado, CIIMAR-Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Porto, Portugal.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Castro
authors.forename: Maria João
authors.initials: MJ
authors.lastname: Santos
mesh_terms: D000818:Animals; D001267:Atlantic Ocean / Q000453:epidemiology; D017753:Ecosystem; D004478:Ectoparasitic Infestations / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D005393:Fish Diseases / Q000453:epidemiology / Q000469:parasitology*; D010473:Perciformes
references.citation: Parasitology. 2011 Jul;138(8):1061-7
references.pmid: 21733262
references.citation: Int J Parasitol. 1991 Sep;21(5):565-72
references.pmid: 1743852
references.citation: Int J Parasitol. 1998 Oct;28(10):1645-52
references.pmid: 9801922
references.citation: Parasitology. 1997 Jul;115 ( Pt 1):69-79
references.pmid: 9280897
references.citation: Trends Parasitol. 2006 Oct;22(10):475-83
references.pmid: 16920027
references.citation: Parasitology. 1994;109 Suppl:S69-84
references.pmid: 7854853
references.citation: Parasitology. 2001;122 Suppl:S3-11
references.pmid: 11442194
references.citation: J Parasitol. 1997 Aug;83(4):575-83
references.pmid: 9267395
references.citation: Folia Parasitol (Praha). 2001;48(1):30-6
references.pmid: 11266133
references.citation: Int J Parasitol. 2002 Mar;32(3):353-65
references.pmid: 11835975
references.citation: Parasitology. 2001 Apr;122(Pt 4):483-9
references.pmid: 11315182
references.citation: Can J Zool. 1973 Mar;51(3):333-47
references.pmid: 4581918
references.citation: Proc Biol Sci. 2000 Oct 7;267(1456):1973-8
references.pmid: 11075710