Prey selection of juvenile seahorse Hippocampus reidi

Souza-Santos, Lília P.; Regis, Cintia G.; Mélo, Roberta Cecília Silfrônio; Cavalli, Ronaldo Olivera

doi:10.1016/j.aquaculture.2013.04.017

Cited by 18 publications

(17 citation statements)

References 33 publications

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“…In recent years, studies have focused on the use of wild zooplankton or cultured copepods to improve survival and growth during the larviculture of H. reidi (Hora & Jouyex, ; Olivotto et al, ; Randazzo et al, ; Schubert, Vogt, Eder, Hauffe, & Wilke, ; Souza‐Santos et al, ; Willadino et al, ). Despite the benefits of these types of live food, they present a number of disadvantages such as risk of contamination with pathogens (Conceição, Yúfera, Makridis, Morais, & Dinis, ; Su, Cheng, Chen, & Su, ), variable composition (Hoff, Snell, & Neslen, ) and seasonality (Knuckey, Semmens, Mayer, & Rimmer, ), as in the case of wild zooplankton difficulties in mass production, high cost and intensive work for copepod cultivation (Knuckey et al, ; Vu, Jepsen, & Hansen, ).…”

Section: Introductionmentioning

confidence: 99%

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

et al. 2020

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This study evaluated the effect of exogenous digestive enzymes on the survival, growth performance and morphology of the digestive tract of juveniles of the longsnout seahorse Hippocampus reidi fed exclusively with Artemia and supplemented with five different concentrations of porcine pancreatin (PP) (0, 5, 25, 50 and 75 mg/L from birth until 30 days after release). The results found in the present study clearly show that there was a significant increase in survival and growth as well as substantial changes in the morphology of intestinal villi in seahorses fed exclusively with Artemia supplemented with 75 mg/L PP. Therefore, the use of digestive enzyme supplementation constitutes an important advance for the establishment of a more efficient and practical feeding protocol (exclusive use of Artemia) for juveniles of the longsnout seahorse.

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Section: Introductionmentioning

confidence: 99%

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

et al. 2020

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“…However, it is well known that prey selection by marine fish larvae and juveniles strongly depends on the size of both fish and prey (Cunha and Planas ; Olivotto et al ). Prey contrast, shape, and mobility, as well as visual acuity, play an important role in the detection and capture of prey (Shaw et al ; Olivotto et al ; Souza‐Santos et al ). Traditional feeding schemes in fish larvae have been based on Artemia nauplii, rotifer Brachionus plicatilis , and, less frequently, copepods.…”

mentioning

confidence: 99%

Mouth Growth and Prey Selection in Juveniles of the European Long‐snouted Seahorse, Hippocampus guttulatus

Blanco

Planas

2015

J World Aquaculture Soc

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Seahorses are ambush predators that swallow the prey through their tubular snout. In order to better understand mouth growth and its effect on prey preference by juveniles of the seahorse Hippocampus guttulatus, experimental assays were carried out by feeding juveniles (0-30 -d after male's pouch release [dar]) on a mixture of rotifers, Brachionus plicatilis; Artemia nauplii; and copepods; Acartia tonsa. Mouth development in juveniles was accomplished by growth of upper and lower jaws, which were linearly correlated with juvenile length, whereas mouth width (MW) and height (MH) grew exponentially with juvenile size. Additionally, MW and MH were exponentially correlated, so that the transversal section of the mouth increased linearly with juvenile age and length. Gut content and Ivlev' selectivity index demonstrated a permanent rejection of rotifers for the whole experimental period and a clear preference of juveniles for copepods from 0 to 15 dar and for Artemia nauplii afterwards. Results also suggest that juveniles are able to ingest larger prey than those provided as the limiting factor in prey ingestion was not MW, as for many marine fish larvae, but mouth area. A tentative feeding schedule to successfully feed H. guttulatus juveniles from 0 to 30 dar is proposed.

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“…The ingestion rates (IR) of 1 day after release (DAR) juveniles were compared to investigate whether differences in survival and growth were promoted by IR variation. Ingestion trials were performed in 600‐mL beakers with 500 mL of food suspension at salinity 35 g L −1 and a temperature of 27–28°C for 5 h (Souza‐Santos, Regis, Mélo & Cavalli ). The beakers were also lined with blue panels to increase the contrast of the prey in the water as under the aquarium conditions.…”

Section: Methodsmentioning

confidence: 99%

Use of the microalgaNannochloropsis occulatain the rearing of newborn longsnout seahorseHippocampus reidi(Syngnathidae) juveniles

et al. 2015

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The aim of this study was to evaluate the effect of microalgae on the rearing of newborn juveniles of the longsnout seahorse, Hippocampus reidi. Two treatments in three replicates were tested over a 15-day period: with and without the addition of the microalgae Nannochloropsis oculata at a concentration of 2.02 AE 0.44 9 10 6 cells mL À1 . At each replicate, beginning on the second day of life, 120 H. reidi juveniles (stocking density of 3 ind L À1 ) were fed the offspring of the benthic copepod Tisbe biminiensis (100 copepod cm À2 ) together with newly hatched Artemia nauplii (3.8 mL À1 ). From the sixth day of life, enriched Artemia metanauplii replaced newly hatched Artemia nauplii. After 15 days, the H. reidi individuals were counted, measured and weighed. Mean survival was significantly greater in the microalgae treatment (76.42 AE 5.07%) than in the treatment with no microalgae (25.44 AE 6.91%). Moreover, total length, height and dry weight were significantly larger in the microalgae treatment. Thus, the addition of microalgae increases the growth and survival of H. reidi juveniles fed T. biminiensis and Artemia. The higher growth and survival of H. reidi juveniles was not related to the larger ingestion rates but probably to the nutritional improvement of the live feeds or to the probiotic effect. The protocol developed for rearing H. reidi juveniles resulted in a high survival, and represents an advance in the farming of this species.

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Prey selection of juvenile seahorse Hippocampus reidi

Cited by 18 publications

References 33 publications

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

Mouth Growth and Prey Selection in Juveniles of the European Long‐snouted Seahorse, Hippocampus guttulatus

Use of the microalgaNannochloropsis occulatain the rearing of newborn longsnout seahorseHippocampus reidi(Syngnathidae) juveniles

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