Contribution of gut content to the nutritional value of Brachionus plicatilis used as prey in larviculture

Romero-Romero, Sonia; Yúfera, Manuel

doi:10.1016/j.aquaculture.2012.08.011

Cited by 17 publications

(6 citation statements)

References 47 publications

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“…To evaluate the feeding incidence (absence/presence of feed in the larva gut) 10 individual larva per replicate (n = 30 per treatment) were sampled at 5, 6, 8, 12, 16, 20, 23, and 28 DAH, always at 2:00 p.m. to ensure the same feeding status between sampling days. For gut content estimation, gut fullness level was examined by image analysis based on the techniques previously described [40,41]. Each larva was photographed under a microscope connected to the Leica Application Suite (LAS) for digital image analysis.…”

Section: Feeding Incidence and Gut Fullnessmentioning

confidence: 99%

Dietary Curcumin Promotes Gilthead Seabream Larvae Digestive Capacity and Modulates Oxidative Status

Xavier

Dardengo

Navarro-Guillén

et al. 2021

Animals

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The larval stage is highly prone to stress due to the ontogenetic and metabolic alterations occurring in fish. Curcumin inclusion in diets has been shown to improve growth by modulating oxidative status, immune response, and/or feed digestibility in several fish species. The aim of the present work was to assess if dietary curcumin could promote marine fish larvae digestive maturation and improve robustness. Gilthead seabream larvae were fed a diet supplemented with curcumin at dose of 0 (CTRL), 1.5 (LOW), or 3.0 g/Kg feed for 27 days. From 4 to 24 days after hatching (DAH), no differences were observed in growth performance. At the end of the experiment (31 DAH) LOW larvae had a better condition factor than CTRL fish. Moreover, HIGH larvae showed higher trypsin and chymotrypsin activity when compared to CTRL fish. LOW and HIGH larvae were able to maintain the mitochondrial reactive oxygen species production during development, in contrast to CTRL larvae. In conclusion, curcumin supplementation seems to promote larvae digestive capacity and modulate the oxidative status during ontogeny. Furthermore, the present results provide new insights on the impacts of dietary antioxidants on marine larvae development and a possible improvement of robustness in the short and long term.

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Section: Feeding Incidence and Gut Fullnessmentioning

confidence: 99%

Dietary Curcumin Promotes Gilthead Seabream Larvae Digestive Capacity and Modulates Oxidative Status

Xavier

Dardengo

Navarro-Guillén

et al. 2021

Animals

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“…An inappropriate feeding schedule may limit ingestion, either because the larvae do not eat or do not detect the prey at feeding time or because they are already satiated. In both cases, the prey will spend hours in the tanks before being eaten, with a consequent drop in nutritional quality (Romero‐Romero & Yúfera ). On the other hand, in many species that tend to eat continuously during the early stages of life, an excess of food during the feeding period may shorten the gut passage time, while the prey are less efficiently digested (for details see section Gut transit rate vs dietary protein utilization).…”

Section: Feeding Behaviour and Appetitementioning

confidence: 99%

Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research

Rønnestad

Yúfera

Ueberschär

et al. 2013

Reviews in Aquaculture

391

327

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Food uptake follows rules defined by feeding behaviour that determines the kind and quantity of food ingested by fish larvae as well as how live prey and food particles are detected, captured and ingested. Feeding success depends on the progressive development of anatomical characteristics and physiological functions and on the availability of suitable food items throughout larval development. The fish larval stages present eco-morpho-physiological features very different from adults and differ from one species to another. The organoleptic properties, dimensions, detectability, movements characteristics and buoyancy of food items are all crucial features that should be considered, but is often ignored, in feeding regimes. Ontogenetic changes in digestive function lead to limitations in the ability to process certain feedstuffs. There is still a lack of knowledge about the digestion and absorption of various nutrients and about the ontogeny of basic physiological mechanisms in fish larvae, including how they are affected by genetic, dietary and environmental factors. The neural and hormonal regulation of the digestive process and of appetite is critical for optimizing digestion. These processes are still poorly described in fish larvae and attempts to develop optimal feeding regimes are often still on a 'trial and error' basis. A holistic understanding of feeding ecology and digestive functions is important for designing diets for fish larvae and the adaptation of rearing conditions to meet requirements for the best presentation of prey and microdiets, and their optimal ingestion, digestion and absorption. More research that targets gaps in our knowledge should advance larval rearing.

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“…The high variability found within the SI results, combined with the higher concentration of 18:2(n‐6) (trophic marker that may be partly of phanerogam origin; Kelly & Scheibling and references therein), inside the MPA for both species, may reflect a higher density and better conservation status of the seagrass meadows inside the MPA (Gili & Ros ; Romero‐Romero & Yufera ). This result is in agreement with previous studies documenting that D. sargus prefer this habitat for living and feeding on the seagrass epibionts (García‐Rubies & Zabala ; Gordoa & Moli ; Sala & Ballesteros ).…”

Section: Discussionmentioning

confidence: 85%

Nutritional condition of two coastal rocky fishes and the potential role of a marine protected area

Viladrich¹,

Rossi²,

López‐Sanz

et al. 2015

Marine Ecology

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Knowledge of the nutritional conditions of coastal commercial fish populations is key to understanding stock health status, and is essential when making reasonable exploitation and management plans. Here, we present the first results on the condition and feeding preferences of two coastal fish species, Diplodus sargus (Linnaeus, 1758) and Pagellus erythrinus (Linnaeus, 1758). Using stable isotope and biochemical analyses, we tested the potential effects of a marine protected area (MPA) and the occurrence of a dramatic coastal storm on the condition and quality of nutrition. The results suggest that both condition (lipids) and nutrition quality (fatty acids, FAs) in P. erythrinus and D. sargus depend upon on food availability in the area in which they were captured. Pagellus erythrinus individuals inside the MPA stored higher quantities of lipids [46.73 AE 19.00 lg lipidÁmg organic matter (OM) À1 ] than those outside the MPA (15.63 AE 5.30 lg lipidÁmg OM À1 ) only before the storm. Diplodus sargus showed different FA signatures inside and outside the MPA before and after the storm. These results suggest that D. sargus increased their quality of nutrition inside (16.62 AE 3.17 lg FAÁmg OM À1 ) versus outside (7.88 AE 2.36 lg FAÁmg OM À1 ) the MPA, owing to increased food diversity and availability. Conversely, P. erythrinus did not show differences in nutritional quality inside (18.12 AE 1.13 lg FAÁmg OM À1 ) or outside (18.81 AE 1.42 lg FAÁmg OM À1 ) the MPA, possibly because of the increase in ingestion not affecting the studied parameters. In P. erythrinus, the FA concentration decreased after the storm, but in D. sargus, a change in lipid composition was observed. These results suggest that P. erythrinus appears to be more impacted by food quality (different saturated and unsaturated FAs) than D. sargus, owing to a more restrictive diet. We hypothesize that the observed differences between inside and outside the MPA are not only related to the degree of protection, but also to the feeding preferences and behaviour of both fishes.

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Contribution of gut content to the nutritional value of Brachionus plicatilis used as prey in larviculture

Cited by 17 publications

References 47 publications

Dietary Curcumin Promotes Gilthead Seabream Larvae Digestive Capacity and Modulates Oxidative Status

Dietary Curcumin Promotes Gilthead Seabream Larvae Digestive Capacity and Modulates Oxidative Status

Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research

Nutritional condition of two coastal rocky fishes and the potential role of a marine protected area

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