Use of the freshwater rotifer Brachionus angularis as the first food for larvae of the Siamese fighting fish Betta splendens

Abstract

Larvae of the Siamese fighting fish Betta splendens were reared on the mass-cultured small freshwater rotifer Brachionus angularis Laos strain (UTACLao), Paramecia sp., and Artemia as live food sources. Larvae fed live food were found to have a significantly high survival rate (97.5-100%) 18 days after hatch (DAH) in comparison to the control unfed larvae, which died by 12 DAH. Rotifer-fed larvae were found to grow faster than paramecia-fed larvae. The fastest growth rate was observed in larvae fed a combination of rotifer and Artemia, with growth in these larvae increasing by 282% by 18 DAH [total length (TL) 11.3 ± 1.2 mm] relative to body measurements taken 3 DAH. The next fastest growth rate was observed in rotifer-fed larvae, with a 158% increase in growth observed by 18 DAH (TL 7.6 ± 0.5 mm). The paramecia-fed larvae were found to grow by only 54.3% (TL 4.6 ± 0.1 mm) during the same period.

Gene expression pattern of digestive and antioxidant enzymes during the larval development of reared Atlantic bluefin tuna (ABFT),Thunnus thynnusL.

“…This high mortality rate has been suggested to be at least partly related to nutritional deficiencies since the feeding sequence was shown to influence both survival and growth (De La Gandara et al 2010). Several studies have reported that growth and survival rates during larval stages of different species were related to the nutritional value of the feed and/or food digestion, nutrient absorption and metabolism (Fuentes, Sanchez, Lago, Iglesias, Pazos & Linares 2012;Ogata & Kurokura 2012;Yu, Ai, Mai, Ma, Cahu & Zambonino-Infante 2012). In the present experiment, bluefin tuna larvae were fed enriched preys (rotifer and Artemia nauplii) following specific sequence in order to attempt to meet the energetic and nutritional needs at that stage.…”

Importance of the freshwater rotifer Brachionus angularis for improved survival rate of early life‐history stages of pangasius catfish, Pangasianodon hypophthalmus

“…Moreover, when fighting fish ( Betta splendens ) larvae were reared using several live feeds ( B. angularis , Paramecia sp. and Artemia ) the larvae fed B. angularis rotifers grew faster than the larvae fed Paramecia, while the larvae fed a combination of B. angularis rotifers and Artemia grew the fastest (Ogata & Kurokura, 2012). The nutritional benefits of live feed are most likely due to the exogenous enzymes present within live feeds as these digestive enzymes are crucial during early life‐history stages because larvae are still actively undergoing development of their digestive system (i.e.…”

“…In addition to the brackish water rotifer ( Brachionus plicatilis ), which has substantially contributed to the success of commercial aquaculture production of more than 80 species of marine fish and crustaceans, freshwater rotifers (e.g. B. calyciflorus and B. angularis ) have also been used as a live feed for many freshwater aquaculture fish species worldwide (Awaiss et al., 1992; Harzevili et al., 2003; reviewed by Arimoro, 2006; Ogata & Kurokura, 2012). Our previous study demonstrated that feeding newly hatched to 10‐day‐old fingerling marble gopy ( Oxyleotris marnoratus ) larvae with B. angularis rotifers at a density of 11 individuals per ml (ind./ml) significantly increased survival compared to unfed control larvae (Tran & Vu, 2013).…”

Larvicultura do betta em água levemente salinizada

“…Artemia nauplii has been used successfully as live feed during the intensive larviculture of freshwater species (PORTELLA and DABROWSKI, 2008;LUZ and SANTOS, 2010;JOMORI et al, 2012;PORTELLA et al, 2014), and also in Siamese fighting fish larval rearing (OGATA and KUROKURA, 2012;FOSSE et al, 2013). However, the lifetime of the Artemia nauplii in freshwater is reduced, and the use of low-salinity water may improve its lifetime (JOMORI et al, 2012), providing longer period of live prey exposure to the fish larvae.…”