title: Effects of local Polynesian plants and algae on growth and expression of two immune-related genes in orbicular batfish (Platax orbicularis).
abstract: The emerging orbicular batfish (Platax orbicularis) aquaculture is the most important fish aquaculture industry in French Polynesia. However, bacterial infections are causing severe mortality episodes. Therefore, there is an urgent need to find an effective management solution. Besides the supplying difficulty and high costs of veterinary drugs in French Polynesia, batfish aquaculture takes place close to the coral reef, where use of synthetic persistent drugs should be restricted. Medicinal plants and bioactive algae are emerging as a cheaper and more sustainable alternative to chemical drugs. We have studied the effect of local Polynesian plants and the local opportunistic algae Asparagopsis taxiformis on batfish when orally administered. Weight gain and expression of two immune-related genes (lysozyme g - Lys G and transforming growth factor beta - TGF-β1) were studied to analyze immunostimulant activity of plants on P. orbicularis. Results showed that several plants increased Lys G and TGF-β1 expression on orbicular batfish after 2 and 3 weeks of oral administration. A. taxiformis was the plant displaying the most promising results, promoting a weight gain of 24% after 3 weeks of oral administration and significantly increasing the relative amount of both Lys G and TGF-β1 transcripts in kidney and spleen of P. orbicularis.
authors.affiliation: CRIOBE, USR3278-CNRS/EPHE/UPVD/PSL, University of PerpignanViaDomitia, 52 Avenue Paul Alduy, 66860 Perpignan, France; CRIOBE, USR3278-CNRS/EPHE/UPVD/PSL, BP1013 Papetoai, 98729 Moorea, French Polynesia; Laboratoire d'Excellence "CORAIL", 98729 Moorea, French Polynesia. Electronic address: mirireverter@gmail.com.
authors.forename: Miriam
authors.initials: M
authors.lastname: Reverter
authors.affiliation: Ifremer, UMR 241 EIO, UPF-ILM-IRD, B.P. 49, 98719 Taravao, Tahiti, French Polynesia; Laboratoire d'Excellence "CORAIL", 98729 Moorea, French Polynesia.
authors.forename: Denis
authors.initials: D
authors.lastname: Saulnier
authors.affiliation: Ifremer, UMR 241 EIO, UPF-ILM-IRD, B.P. 49, 98719 Taravao, Tahiti, French Polynesia; Service de la Pêche BP 20 Papeete, Tahiti 98713, French Polynesia.
authors.forename: Rarahu
authors.initials: R
authors.lastname: David
authors.affiliation: Ifremer, UMR 241 EIO, UPF-ILM-IRD, B.P. 49, 98719 Taravao, Tahiti, French Polynesia.
authors.forename: Agnès
authors.initials: A
authors.lastname: Bardon-Albaret
authors.affiliation: Ifremer, UMR 241 EIO, UPF-ILM-IRD, B.P. 49, 98719 Taravao, Tahiti, French Polynesia.
authors.forename: Corinne
authors.initials: C
authors.lastname: Belliard
authors.affiliation: CRIOBE, USR3278-CNRS/EPHE/UPVD/PSL, University of PerpignanViaDomitia, 52 Avenue Paul Alduy, 66860 Perpignan, France; Laboratoire d'Excellence "CORAIL", 98729 Moorea, French Polynesia.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Tapissier-Bontemps
authors.affiliation: CRIOBE, USR3278-CNRS/EPHE/UPVD/PSL, BP1013 Papetoai, 98729 Moorea, French Polynesia; Laboratoire d'Excellence "CORAIL", 98729 Moorea, French Polynesia.
authors.forename: David
authors.initials: D
authors.lastname: Lecchini
authors.affiliation: CRIOBE, USR3278-CNRS/EPHE/UPVD/PSL, BP1013 Papetoai, 98729 Moorea, French Polynesia; Laboratoire d'Excellence "CORAIL", 98729 Moorea, French Polynesia.
authors.forename: Pierre
authors.initials: P
authors.lastname: Sasal
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis*; D029941:Fish Proteins / Q000235:genetics* / Q000378:metabolism; D005786:Gene Expression Regulation; D009113:Muramidase / Q000235:genetics / Q000378:metabolism; D010473:Perciformes / Q000235:genetics* / Q000254:growth & development* / Q000378:metabolism; D010946:Plants, Medicinal / Q000737:chemistry*; D011114:Polynesia; D000461:Rhodophyta / Q000737:chemistry*; D053773:Transforming Growth Factor beta1 / Q000235:genetics / Q000378:metabolism
chemical_list: D029941:Fish Proteins; D053773:Transforming Growth Factor beta1; D009113:Muramidase
keywords: Asparagopsis taxiformis; Immunostimulant; Lysozyme G; Orbicular batfish; Relative gene expression; Transforming growth factor