Special Issue "Live Feeds for Sustainable Aquaculture"

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Guest Editor

Department and Graduate Institute of Aqauculture, National Kaohsiung University of Science and Technology, Kaohsiung 404, Taiwan
Interests: comparative physiology; proteomics; metabolomics; live feeds in aquaculture

Prof. Dr. Chun-Hung Liu

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Guest Editor

Department of Aquaculture, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
Interests: aquafeeds; nutrition physiology; development and utilization of probiotics; immuno-stimulantant

Special Issue Information

Dear Colleagues,

Live feeds are essential for the successful larviculture of fish, crustaceans and shellfish. As global climate changes and disease transmission diversifies, the stability of live feed production and the prevelance of disease carriers present challenges to sustainable aquaculture. Aquatic live feeds are mostly composed of phytoplanktons and zooplanktons, the former being microalgae and the latter including bivalve larvae, rotifers, copepods, cladocerans and brine shrimps. In addition to their characteristics, including their short lifespans, edibility and high digestibility, live feeds must also be easy for aquafarmers to cultivate and obtain. Therefore, for sustainable aquaculture, this Special Issue will present a collection of international investigations on live feeds in aquaculture. Articles addressing a wide range of issues, including selection techniques, application strategies, culture environment, culture conditions, nutrient composition, physiology, quality improvement, etc., for live feeds in aquaculture, are welcome. In addition, papers covering themes of great significance to advances against global climate changes are especially encouraged. Research papers, communications and review papers are all welcome.

Prof. Dr. Kuohsun Chiu
Prof. Dr. Chun-Hung Liu
Guest Editors

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Keywords

live feeds
aquaculture
larviculture
climate change
copepoda
rotifer
microalgae
Artemia

Published Papers (2 papers)

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Research

Open AccessArticle

Effect of Microalgal Diets on Sunray Venus Clam (Macrocallista nimbosa) Production and Fatty Acid Profile

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Fishes 2023, 8(2), 72; https://doi.org/10.3390/fishes8020072 - 26 Jan 2023

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Abstract

The sunray venus (sunray) clam, Macrocallista nimbosa, is an alternative clam species reared in hard clam hatcheries in Florida. Current feeding practices follow those used for hard clam culture. This study aimed to identify whether a hard clam bi-algal Tisochrysis lutea and Chaetoceros neogracile diet was an optimal diet for post-set sunray clams or whether other microalgal dietary combinations could improve production. Six dietary bi-, tri-, or tetra-algal combinations consisting of four microalgae species (Tisochrysis lutea, Diacronema lutheri, Chaetoceros neogracile, and Thalassiosira weissflogii) were fed for 6 weeks; the growth, survival, and fatty acid profiles of post-set clams were evaluated. Clams fed equal proportions of T. lutea, D. lutheri, C. neogracile, and T. weissflogii had higher growth, while those fed equal proportions of T. lutea and C. neogracile had higher survival. The poorest-performing diet consisted solely of diatoms. A contrasting polyunsaturated fatty acid (PUFA) profile was found in post-set clams fed flagellate- or diatom-only diets. Clams fed the bi-algal flagellate diet had a higher percentage of docosahexaenoic acid (DHA) but a lower percentage of (n-6) PUFA, whereas those fed the bi-algal diatom diet had a higher percentage of arachidonic acid (ARA) and eicosapentaenoic acid (EPA) but a lower percentage of DHA. The percentages were similar and neither very high nor very low in clams fed the remaining dietary treatments. The results of this study show that sunray venus post-set clams can be successfully produced when fed a typical hard clam bi-algal flagellate and diatom diet, but they indicate that growth may be accelerated by the addition of other microalgae species. Full article

(This article belongs to the Special Issue Live Feeds for Sustainable Aquaculture)

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Open AccessArticle

Effects of Microplastics on Reproduction and Growth of Freshwater Live Feeds Daphnia magna

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Fishes 2022, 7(4), 181; https://doi.org/10.3390/fishes7040181 - 22 Jul 2022

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Abstract

In recent years, much research has focused on studying the damage caused by microplastics to the ecological environment and human health. Indeed, MPs are often consumed by shellfishes and zooplanktons due to their similarity in size to POM (particular organic matter). Especially in zooplankton, the accumulation of MPs in the body affects the reproductive system and the growth rate of juveniles. Moreover, toxins derived from MPs are continuously accumulated in predators of zooplankton and impact the whole ecosystem across the food chain. In this work, we found that even though MPs were internalized by and adherent around Daphnia magna, there were no significant differences in the survival rate of their adults and offspring. However, the population of ovigerous adults under high MPs exposure for 7 days decreased significantly, suggesting an extension of the days of sexual maturity in D. magna. The removal of MPs after 7 days’ MPs treatment resulted in an increase in D. magna juveniles and neonates which indicated their growth was reduced or inhibited in the MPs environment. Overall, the uptake of MPs led to negative effects on population reproduction and the growth of offspring in D. magna. Full article

(This article belongs to the Special Issue Live Feeds for Sustainable Aquaculture)

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