The influence of diet on the early development of two seahorse species (H. guttulatus and H. reidi): Traditional and innovative approaches

Randazzo, Basilio; Rolla, L.; Ofelio, Claudia; Planas, Miquel; Gioacchini, Giorgia; Vargas, Arturo; Giorgini, Elisabetta; Olivotto, Ike

doi:10.1016/j.aquaculture.2018.02.029

Cited by 45 publications

(55 citation statements)

References 86 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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“…Polyunsaturated fatty acids (PUFAs) are essential FAs in regulating normal growth and development in many sh species (Anderson et al, 1990;Olivotto et al, 2011b) and promoting muscle ber development (Cong-cong et al, 2019). Speci cally, DHA is a structural key component of cell membranes involved in their biosynthesis (Olivotto et al, 2011b;Randazzo et al, 2018). The low levels of DHA in diet A might thus be responsible for the alterations found in some muscle bers.…”

Section: Discussionmentioning

confidence: 99%

A multidisciplinary experimental study on the effects of breeders diet on newborn seahorses (Hippocampus guttulatus)

Planas

Olivotto

González

et al. 2020

Preprint

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The global trade in seahorses is increasing and new rearing techniques are currently available for a few species. One of the main bottlenecks in seahorse production is reproduction success, which is dependent upon the administration of high quality diets to breeders. However, very little is known about the most adequate diets, on how they should be administered and on how they might affect newborn performance. In this study, three homogeneous groups of adult seahorses Hippocampus guttulatus were maintained in captivity. Each group was fed on one of the following diets since the onset of the breeding period: Unenriched adult Artemia (Diet A), unenriched adult Artemia and mysidaceans (Diet AM) and mysidaceans (Diet M). As a positive control we used a wild pregnant male. The mixed diet AM provided the highest overall breeding success and reasonable fatty acid profiles, and better resembled newborn from a wild male. The use of only mysidaceans (Diet M) provided the worse results in spite of the high DHA content. Significant differences were observed in newborn characteristics and fatty acid profiles among dietary groups and along the breeding season, especially in total n-3 HUFA and DHA. Monospecific diets including Artemia or mysidaceans very likely suffered nutritional deficiencies, which were reflected in morphological alterations of the muscle tissue (diet A) or abnormal early mortalities in newborn (diet M). Three progressive stages were identified along the whole breeding period: Initial mixed capital-income period (100 – 120 days since the onset of the breeding period), followed by an inflexion period (short transitional stage - income sources), and finally a long period characterized by the use of income sources and the progressive exhaustion of body reserves. Special attention should be deserved to the progressive changes in fatty acid profiles along the breeding season, resulting in a decrease in newborn performance. Considering the time required for a diet to be reflected in newborn, we recommend Hippocampus guttulatus breeders to be fed on a high quality diet for at least three months prior the breeding period.

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“…Microsetella sp. was chosen because of its wider size range and a high content of essential highly unsaturated fatty acids (HUFAs), which are important for larval survival and growth (Randazzo et al, ; Sargent, Bell, McEvoy, Toher & Estevez, ). Copepodites were separated from adults using different‐sized mesh (100–50 μm).…”

Section: Methodsmentioning

confidence: 99%

Year‐round natural spawning, early development, and the effects of temperature, salinity and prey density on captive ornate gobyIstigobius ornatus(Rüppell, 1830) larval survival

2018

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Natural spawning, early development and larviculture of the ornate goby Istigobius ornatus in captivity were studied for the first time. I. ornatus spawned 46 times from 31 October 2013 to 31 October 2014. Fecundity ranged from 246 to 10,214 eggs per clutch, with an average hatching rate of 77.8% ± 9.9% (M ± SEM). Fertilized eggs (1.31-1.54 × 0.46-0.50 mm in diameter) were adhesive demersal and oval-shaped.Embryonic development lasted 84 hr at 27.5 ± 0.5°C. Newly hatched larvae [2.12 ± 0.04 mm in total length (TL)] transformed to the juvenile stage completely when TL was 7.79 mm. Effects of different water temperatures (24, 28 and 32°C) and salinities (10, 15, 20, 25, 30, 35 and 40 g/L) on per cent survivals (%) and survival activity indices (SAIs) were tested. Survival was not significantly different under different temperatures; SAIs was significantly higher at 28°C. Larvae showed the significantly higher survival and SAIs at salinities 10-30 g/L than at 35 and 40 g/L.Effect of different prey densities on survival was significantly higher in 7 days post hatch larvae fed 20 and 30 rotifers/ml. These findings could guide future programs in captive breeding technology development and commercial production of other marine ornamental gobies. K E Y W O R D S early development, Istigobius ornatus, larviculture, marine ornamentals, spawning, survival activity index How to cite this article: Chiu P-S, Leu M-Y, Meng P-J. Yearround natural spawning, early development, and the effects of temperature, salinity and prey density on captive ornate goby Istigobius ornatus (Rüppell, 1830) larval survival. Aquac

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The influence of diet on the early development of two seahorse species (H. guttulatus and H. reidi): Traditional and innovative approaches

Cited by 45 publications

References 86 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

A multidisciplinary experimental study on the effects of breeders diet on newborn seahorses (Hippocampus guttulatus)

Year‐round natural spawning, early development, and the effects of temperature, salinity and prey density on captive ornate gobyIstigobius ornatus(Rüppell, 1830) larval survival

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