Impacts of host phylogeny, feeding styles, and parasite attachment site on isotopic discrimination in helminths infecting coral reef fish hosts - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2020

Impacts of host phylogeny, feeding styles, and parasite attachment site on isotopic discrimination in helminths infecting coral reef fish hosts

Philip Riekenberg
  • Fonction : Auteur
Marine Briand
Thibaud Moléana
  • Fonction : Auteur
Marcel van Der Meer
  • Fonction : Auteur
David Thieltges
  • Fonction : Auteur
Yves Letourneur

Résumé

Stable isotopes of carbon and nitrogen characterize trophic relationships in predator-prey relationships, with clear differences between consumer and diet (discrimination factor, Δ 13 C, Δ 15 N). However, parasite-host isotopic relationships remain unclear, with Δ 13 C and Δ 15 N remaining incompletely characterized, especially for helminths. In this study, we used stable isotopes to determine discrimination factors for 13 parasite-host pairings of helminths in coral reef fish. Δ 15 N differences grouped according to phylogeny and attachment site on the hosts: Δ 15 N was positive for trematodes and nematodes from the digestive tract and varied for cestodes and nematodes from the general cavity. Δ 13 C showed more complex patterns with no effect of phylogeny or attachment site. A negative relationship was observed between Δ 15 N and host δ 15 N value among different host-parasite pairings as well as within 7 out of the 13 parings, indicating that host metabolic processing affects host-parasite discrimination values. In contrast, no relationships were observed for Δ 13 C. Our results indicate that host phylogeny, attachment site and host stable isotope value drive Δ 15 N of helminths in coral reef fish while Δ 13 C is more idiosyncratic. These results call for use of taxon- or species-specific and scaled framework for bulk stable isotopes in the trophic ecology of parasites.

Dates et versions

hal-03034248 , version 1 (01-12-2020)

Identifiants

Citer

Philip Riekenberg, Marine Briand, Thibaud Moléana, Pierre Sasal, Marcel van Der Meer, et al.. Impacts of host phylogeny, feeding styles, and parasite attachment site on isotopic discrimination in helminths infecting coral reef fish hosts. 2020. ⟨hal-03034248⟩
51 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More