Rearing techniques and nutritional quality of two mysids from Gran Canaria (Spain)

Abstract

This paper presents the preliminary results of different trials carried out with two species of mysids from Gran Canaria: Leptomysis lingvura (G.O. Sars, 1866) and Paramysis nouvel. Experiments lasting 21 days showed significantly higher fecundity and survival in L. lingvura than in P. nouveli (P<0.05). We also report the biochemical profile of both species fed 48‐h‐Artemia nauplii enriched with Easy‐DHA‐Selco® for 7 days. A comparison of our results with those of for Artemia and rotifers, organisms frequently used as live food in aquaculture, showed that mysids have a high percentage of protein per dry mass (73.38% in P. nouveli, and 74.19% in L. lingvura). Furthermore, the percentage of docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA) and arachidonic acid (AA) in total fatty acids was higher in both species than that reported by Roo and colleagues for rotifers and Artemia. In addition to the content of these fatty acids, their ratios between them are also important for normal growth and larval development. We found that the ratio, DHA:EPA, was 0.85 0.02 and 0.89 0.01; the ratio, DHA: AA, 6.25 0.26 and 4.74 0.14; and the ratio, EPA:AA, 7.32 0.26 and 5.32 0.2, respectively, for P. nouveli and L. lingvura in cultures and these ratios do not significantly differ (P>0.05) from organisms in the wild. Here, we argue that as mysids are prey for many commercially important fish, cephalopods and rays, it is likely that the biochemical composition of mysids in their natural environment is “optimal” for these predators. Therefore, we studied the lipid profile of both species as they naturally occur in their environment. The results indicate that these mysids could be used to develop high quality live fish food.

A general survey of the feasibility of culturing the mysid Gastrosaccus roscoffensis (Peracarida, Mysida): Growth, survival, predatory skills, and lipid composition

“…In relation to the biochemical composition, the percentages (percent dry weight) of total protein for wild and cultured G. roscoffensis (60.61 ± 2.60 and 69.87 ± 7.66, respectively) are similar to values obtained for other mysid species (wild and/or cultured), such as Metamysidopsis insularis , Mesopodopsis orientalis , Paramysis nouveli, and Leptomysis lingvura (Herrera et al 2009). Likewise, the TL percentage of cultured G. roscoffensis is similar to the values of the species named before; however, that of wild G. roscoffensis (8.10 ± 0.71) is about one-half of the values reported in the articles mentioned above, only wild M. orientalis showing a similar TL (10.60 ± 0.10).…”

“…En relación a la composición bioquímica, los porcentajes (porcentaje en peso seco) de proteína total de los ejemplares salvajes y cultivados de G. roscoffensis (60.61 ± 2.60 y 69.87 ± 7.66, respectivamente) fueron similares a los valores obtenidos en otras especies de misidáceos (salvajes y/o cultivados), tales como Metamysidopsis insularis , Mesopodopsis orientalis , Paramysis nouveli y Leptomysis lingvura (Herrera et al 2009). De la misma manera, el porcentaje de LT de los individuos de G. roscoffensis cultivados fue similar a los valores de las especies anteriormente mencionadas.…”

Understanding tetrazolium reduction and the importance of substrates in measuring respiratory electron transport activity

“…All experiments were conducted with adult male Leptomysis lingvura, a planktonic Canary Island mysid collected in autumn at Risco Verde, according to Herrera et al (2011) andFernández-Urruzola et al (2011). The organisms were kept for no more than 3 days under controlled conditions at 20 ± 1°C and fed with Artemia salina nauplii enriched with Easy-DHA Selco® as described by Herrera et al (2011).…”

“…The organisms were kept for no more than 3 days under controlled conditions at 20 ± 1°C and fed with Artemia salina nauplii enriched with Easy-DHA Selco® as described by Herrera et al (2011). Each mysid was frozen in liquid nitrogen and stored at −80°C for later analysis for ETS activity and biomass.…”

Collecting and processing mysids, stygiomysids, and lophogastrids

“…Mysids have also become common model systems in developmental and environmental toxicology studies, leading to a large body of literature on how to rear and maintain mysids in laboratory settings (Domingues et al, 1998;Ma et al, 2001;Herrera et al, 2011;ASTM E1191-03a, 2014.…”