Stable Isotopes as a Tool for Nutrient Assimilation Studies in Larval Fish Feeding on Live Food

2004 ◽  
Vol 38 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Christian Schlechtriem ◽  
Ulfert Focken ◽  
Klaus Becker
Keyword(s):  
Stable Isotopes ◽  
Larval Fish ◽  
Live Food ◽  
Fish Feeding ◽  
Nutrient Assimilation

scholarly journals Osmotic induction improves batch marking of larval fish otoliths with enriched stable isotopes

2014 ◽  
Vol 71 (9) ◽  
pp. 2530-2538 ◽  
Author(s):  
Emmanuel de Braux ◽  
Fletcher Warren-Myers ◽  
Tim Dempster ◽  
Per Gunnar Fjelldal ◽  
Tom Hansen ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Salmo Salar ◽  
Larval Fish ◽  
Fish Larvae ◽  
Cost Effective ◽  
Industrial Applications ◽  
Chemical Markers ◽  
Potential Applications ◽  
Recent Method ◽  
Batch Marking

Abstract Otolith marking with enriched stable isotopes via immersion is a recent method of batch marking larval fish for a range of research and industrial applications. However, current immersion times and isotope concentrations required to successfully mark an otolith limit the utility of this technique. Osmotic induction improves incorporation and reduces immersion time for some chemical markers, but its effects on isotope incorporation into otoliths are unknown. Here, we tested the effects of osmotic induction over a range of different isotope concentrations and immersion times on relative mark success and strength for 26Mg:24Mg, 86Sr:88Sr and 137Ba:138Ba on Atlantic salmon (Salmo salar) larvae. 71% and 100% mark success were achieved after 1 h of immersion for 86Sr (75 µg L−1) and 137Ba (30 µg L−1) isotopes, respectively. Compared with conventional immersion, osmotic induction improved overall mark strength for 86Sr and 137Ba isotopes by 26–116%, although this effect was only observed after 12 h of immersion and predominately for 86Sr. The results demonstrate that osmotic induction reduces immersion times and the concentrations of isotope required to achieve successful marks. Osmotically induced isotope labels via larval immersion may prove a rapid and cost-effective way of batch marking fish larvae across a range of potential applications.

scholarly journals Feeding of the Brycon cephalus, Triportheus elongatus and Semaprochilodus insignis (osteichthyes, characiformes) larvae in Solimões/Amazonas River and floodplain areas.

2002 ◽  
Vol 32 (3) ◽  
pp. 499-499 ◽  
Author(s):  
Rosseval Galdino LEITE ◽  
Carlos A.R.M. ARAUJO-LIMA
Keyword(s):  
Food Item ◽  
Prey Size ◽  
Larval Fish ◽  
Fish Larvae ◽  
Trophic Relations ◽  
Fish Feeding ◽  
Important Species ◽  
Flooded Forests ◽  
Commercially Important

Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in Triportheus elongatus and detritus in Semaprochilodus insignis. The increase of the ingestion limit, as the larvae grew, was higher than the increase in the consumed prey size for the three species.

scholarly journals Larval fish feeding and turbulence: A case for the downside

2000 ◽  
Vol 45 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Brian R. MacKenzie ◽  
Thomas KiØrboe
Keyword(s):  
Larval Fish ◽  
Fish Feeding

Ecological and Ethological Perspectives in Larval Fish Feeding

2003 ◽  
Vol 13 (1-2) ◽  
pp. 145-178 ◽  
Author(s):  
T. Ramakrishna Rao
Keyword(s):  
Larval Fish ◽  
Fish Feeding

Larval fish feeding ecology, growth and mortality from two basins with contrasting environmental conditions of an inner sea of northern Patagonia, Chile

2015 ◽  
Vol 106 ◽  
pp. 19-29 ◽  
Author(s):  
Mauricio F. Landaeta ◽  
Claudia A. Bustos ◽  
Jorge E. Contreras ◽  
Franco Salas-Berríos ◽  
Pámela Palacios-Fuentes ◽  
...  
Keyword(s):  
Feeding Ecology ◽  
Environmental Conditions ◽  
Larval Fish ◽  
Fish Feeding ◽  
Northern Patagonia

scholarly journals Individual-based simulations of larval fish feeding in turbulent environments

2007 ◽  
Vol 347 ◽  
pp. 155-169 ◽  
Author(s):  
P Mariani ◽  
BR MacKenzie ◽  
AW Visser ◽  
V Botte
Keyword(s):  
Larval Fish ◽  
Fish Feeding ◽  
Turbulent Environments

Trophic structure and energy flow in backwater lakes of two large floodplain rivers assessed using stable isotopes

2004 ◽  
Vol 61 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Brian R Herwig ◽  
Daniel A Soluk ◽  
John M Dettmers ◽  
David H Wahl
Keyword(s):  
Stable Isotopes ◽  
Energy Flow ◽  
Aquatic Invertebrates ◽  
Trophic Structure ◽  
Larval Fish ◽  
Carbon And Nitrogen ◽  
Trophic Enrichment ◽  
Isotope Studies ◽  
Floodplain Rivers ◽  
Terrestrial Material

Carbon and nitrogen stable isotopes (δ13C and δ15N, respectively) were measured for locally abundant primary producers, detritus, aquatic invertebrates, and fish in backwater lakes of two large floodplain rivers in an effort to understand patterns of energy dependence and trophic structure within these habitats. We observed trophic enrichment values for 15N that were within the ranges observed for other aquatic systems but were often considerably lower than the 3.4‰ typically assumed in stable isotope studies. Production based on benthic and terrestrial material, combined with planktonic production for larval fish, appears to be an important energy source supporting consumers in backwater lakes of large floodplain rivers. Our isotopic data challenge the conventional wisdom that macrophytes are centrally involved in supplying carbon to aquatic consumers in shallow lakes and that food webs in most lakes are sustained almost exclusively by carbon fixed by phytoplankton.

scholarly journals Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon

2012 ◽  
Vol 69 (9) ◽  
pp. 1637-1645 ◽  
Author(s):  
Kirsteen M. MacKenzie ◽  
Clive N. Trueman ◽  
Martin R. Palmer ◽  
Andy Moore ◽  
Anton T. Ibbotson ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Trophic Level ◽  
Tissue Growth ◽  
Spatial Segregation ◽  
Fish Feeding ◽  
Novel Approach ◽  
Age Dependent ◽  
And Migration ◽  
The Uk ◽  
Management And Conservation

Abstract MacKenzie, K. M., Trueman, C. N., Palmer, M. R., Moore, A., Ibbotson, A. T., Beaumont, W. R. C., and Davidson, I. C. 2012. Stable isotopes reveal age-dependent trophic level and spatial segregation during adult marine feeding in populations of salmon from the UK. – ICES Journal of Marine Science, 69: 1637–1645. Locating and differentiating the marine feeding areas used by adult salmon (Salmo salar) is essential to stock-based management and conservation, but traditional tagging studies are limited and influenced by the uneven distribution of the fisheries or research vessel surveys. Here, a novel approach is used, based on the observation that the isotopic composition of animal tissues is intrinsically linked to the environmental conditions during tissue growth, which allows for the distinction of pelagic fish feeding in different locations. This isotopic approach is applied using archived collections of salmon scales and shows that (i) salmon act as size-structured pelagic predators, (ii) adult salmon from different natal origins within the UK (and hence components of the southern European stock complex) feed in different oceanic regions before their return, (iii) one-sea-winter (1SW) and multi-sea-winter salmon returning to some rivers in the UK are separated in their marine feeding areas, whereas those from others are not, and (iv) salmon from the rivers sampled are not feeding in regions of the Northwest Atlantic used by 1SW salmon returning to rivers in Newfoundland. Therefore, the stable isotope approach allows for retrospective investigations of marine diet, location, and migration at stock- and cohort-specific levels.

scholarly journals Dietary Value of Waste-Fed Rotifer Brachionus rotundiformis on the Larval Rearing of Japanese Whiting Sillago japonica

2020 ◽  
Vol 147 ◽  
pp. 01005
Author(s):  
Erick Ochieng Ogello ◽  
Stenly Wullur ◽  
Yoshitaka Sakakura ◽  
Atsushi Hagiwara
Keyword(s):  
Larval Fish ◽  
Fish Larvae ◽  
Cost Effective ◽  
Food Resources ◽  
Live Food ◽  
Control Fish ◽  
Larval Rearing ◽  
Gut Content ◽  
Significant Difference ◽  
Sillago Japonica

Live food resources are useful for larval fish rearing. However, production of sufficient live food resources is expensive. This study employed a cost-effective rotifer culture technique using fish waste diet (FWD) and investigate the effect of the FWD-fed rotifer on larval rearing of the Japanese whiting, Sillago japonica. Fertilized eggs of S. japonica were hatched in polycarbonate tanks containing 100 l of artificial seawater at 10 eggs l-1 with 50 ml min-1 of aeration at room temperature. Two diets (i.e. FWD-fed rotifers and rotifers fed with super fresh Chlorella-V12 as control) were used with 10 rotifers ml-1 for 10 days. Fish were sampled every two days for morphometric and gut content analysis. Fatty acid analysis was done for both rotifers and fish larvae. The fish larvae fed with FWD-rotifers had higher total length than those given control diet. There was no significant difference in survival rate, viability, dry weight, gut content, head length, eye diameter, and body depth between the two diets. The DHA recorded of total lipid for the fish given FWD-rotifer and control fish are3 5.2% and 18.2% respectively. The use of waste-fed rotifers is cost-effective method to enhance the production of larval fish rearing in hatcheries.

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