Parasitic copepods affect morphospace and diet of larvae of a temperate reef fish

N. Jahnsen-Guzmán, V. Bernal-Durán, M. F. Landaeta

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effects of ectoparasites on larvae of the clingfish Gobiesox marmoratus were evaluated at the dietary and morphometric levels. The larvae and ectoparasites were collected by nearshore plankton samplings during October, November and December 2013 off El Quisco Bay, central Chile. The standardized abundance of total larvae and those ectoparasitized larvae (PL) was positively related and high parasite prevalence was found throughout the sampling period (up to 38%). Geometric morphometrics analyses indicate main changes in the shape through early ontogeny and subtle but significant variations between PL and non-parasitized larvae (NPL). Prey composition varied between PL and NPL; small size (<6 mm standard length, LS) parasitized larval G. marmoratus ate mostly gastropod larvae, whereas small non-parasitized specimens ate mainly cirripede nauplii. All larger (>8 mm LS), pre-settlement stages parasitized by Trifur and, or Caligus copepods had content in their gut, suggesting that ectoparasites did not diminish prey capture in host with larger size. Morphometric and dietary changes occurring during larval development were decoupled, both for PL and NPL. The maintenance of a slender, more hydrodynamic body through pelagic development and the ingestion of less-mobile prey in PL suggests non-lethal effects of ectoparasitism on rocky-reef fish larvae.

Original languageEnglish
Pages (from-to)330-346
Number of pages17
JournalJournal of Fish Biology
Volume92
Issue number2
DOIs
Publication statusPublished - 1 Feb 2018
Externally publishedYes

Fingerprint

reefs
Copepoda
reef
diet
larva
larvae
fish
ectoparasites
ectoparasite
Caligus
parasite prevalence
fish larvae
prey capture
sampling
larval development
hydrodynamics
ontogeny
Chile
plankton
digestive system

Keywords

  • Caligidae
  • clingfish
  • geometrics morphometrics
  • Gobiesox marmoratus
  • gut content
  • Pennellidae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

Jahnsen-Guzmán, N. ; Bernal-Durán, V. ; Landaeta, M. F. / Parasitic copepods affect morphospace and diet of larvae of a temperate reef fish. In: Journal of Fish Biology. 2018 ; Vol. 92, No. 2. pp. 330-346.
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Jahnsen-Guzmán, N, Bernal-Durán, V & Landaeta, MF 2018, 'Parasitic copepods affect morphospace and diet of larvae of a temperate reef fish', Journal of Fish Biology, vol. 92, no. 2, pp. 330-346. https://doi.org/10.1111/jfb.13495

Parasitic copepods affect morphospace and diet of larvae of a temperate reef fish. / Jahnsen-Guzmán, N.; Bernal-Durán, V.; Landaeta, M. F.

In: Journal of Fish Biology, Vol. 92, No. 2, 01.02.2018, p. 330-346.

Research output: Contribution to journalArticle

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