Marine amphipods ( Parhyale hawaiensis ) as an alternative feed for the lined seahorse ( Hippocampus erectus , Perri 1810): nutritional value and feeding trial

PeerJ

article

Jorge Arturo Vargas-Abúndez¹  Gemma Leticia Martínez-Moreno²  Nuno Simões³  Elsa Noreña-Barroso³  Maite Mascaró² 

[1] Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México;Unidad Multidisciplinaria de Docencia e Investigación ,(UMDI-Sisal), Facultad de Ciencias, Universidad Nacional Autónoma de México;Laboratorio de Resiliencia Costera;International Chair for Coastal and Marine Studies in Mexico, Harte Research Institute for Gulf of Mexico Studies, Texas A&M University-Corpus Christi;Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México

关键词: Biofloc;    Live feed;    Seahorse;    Fatty acids;    Parhyale hawaiensis;    Lined seahorse;    Gammarid;    Ornamental fish;    Experimental model;   

DOI  :  10.7717/peerj.12288

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Finding new alternatives to traditional live preys such as Artemia and rotifers, which do not always promote optimal fish growth and survival, is required for the successful aquaculture of highly specialized predatory species, including seahorses. The present study assessed the nutritional value of an interesting marine amphipod (Parhyale hawaiensis), and evaluates through a feeding trial its potential use as a natural prey for 10-months lined seahorse, Hippocampus erectus. P. hawaiensis showed high levels of valuable lipids (20.4–26.7% on dry matter basis) and polyunsaturated fatty acids (PUFAs) ( 26.4–41% of total FAs), including the long-chain PUFAs (LC-PUFAs) arachidonic acid (ARA) (2.9–7.7%), eicosapentaenoic acid (EPA) (4.3–6.5%) and docosahexaenoic acid (DHA) (2.1–6.2%). A comparison between wild-captured and cultured amphipods revealed a significant improvement of the amphipod FA profile in terms of DHA%, total omega-3 (n3) FAs and n3/n6 ratio when employing both a conventional amphipod culture based on a commercial shrimp diet, and, to a lesser extent, a large (3,500 L) biofloc system. Seahorses fed with frozen/wild amphipods, either singly or in combination with Artemia enriched with Super Selco® (INVE Aquaculture, Belgium) for 57 days, substantially improved seahorse growth and FA profiles in terms of ARA, EPA and DHA%, including indices associated to marine sources, such as Σn3 and n3/n6, compared to a diet based solely on enriched Artemia. These results support the use of marine amphipods as an alternative food organism for juvenile H. erectus and suggest a potential use for general marine aquaculture.

【 授权许可】

CC BY