Changes in Behaviour at Onset of Exogenous Feeding in Marine Fish Larvae

1992 ◽  
Vol 49 (8) ◽  
pp. 1570-1572 ◽  
Author(s):  
Anne Berit Skiftesvik
Keyword(s):  
Marine Fish ◽  
Swimming Speed ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Fish Larvae ◽  
Scophthalmus Maximus ◽  
Exogenous Feeding ◽  
First Feeding ◽  
Marine Fish Larvae ◽  
Turbot Scophthalmus Maximus

The activity and swimming speed of fed and starved larvae of Atlantic cod (Gadus morhua) and turbot (Scophthalmus maximus) were measured from hatching to metamorphosis. The results indicate changes in behaviour over time, as well as differences between starved and fed larvae. It is suggested that determining the point at which activity increases and swimming speed during active periods decreases may be relevant as an indicator of the time of first feeding in marine fish larvae.

Size-dependent foraging of larval Atlantic cod (Gadus morhua)

2004 ◽  
Vol 82 (8) ◽  
pp. 1380-1389 ◽  
Author(s):  
Velmurugu Puvanendran ◽  
Karine Salies ◽  
Benjamin Laurel ◽  
Joseph A Brown
Keyword(s):  
Marine Fish ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Prey Selection ◽  
Fish Larvae ◽  
Growth And Survival ◽  
Size Dependent ◽  
Marine Fish Larvae ◽  
Key Factor ◽  
Foraging Environment

Most marine fish larvae are thought to be gape-limited predators, and the presence of suitably sized prey at the appropriate time in the foraging environment is a key factor for their growth and survival. Two experiments were carried out: in experiment 1, we investigated feeding of Atlantic cod (Gadus morhua L., 1758) larvae from 5 to 35 days post hatch on prey of three different sizes: two different-sized strains of rotifers, small rotifers (SR) and large rotifers (LR), and Artemia Leach, 1819 nauplii (AN), or an equal mixture of the three types of prey (MIX). In experiment 2, cod larvae were fed SR, LR, or a combination of SR and LR (MIX-R) at concentrations of 1500 and 4000 prey·L–1 from 4 to 20 days post hatch. Feeding incidence, number of prey in the gut, mouth gape, and prey selection were measured. In experiment 1, feeding incidence was initially higher in the SR treatment, while larvae failed to start feeding in either the LR or the AN treatment at 5 dph. Larvae in the LR treatment started feeding at 8 dph, and feeding incidence was comparable to that in the SR treatment, but the total number of prey eaten was higher in the SR than in the LR treatment until 20 dph. Larvae did not start feeding on AN until 26 dph, although they attacked them from 5 dph. In the MIX-R treatment in experiment 2, larvae fed selectively on LR at 4000 prey·L–1, whereas no selection was observed at 1500 prey·L–1. Our results suggest that cod larvae are gape-limited predators and the concentration of prey affects prey selection.

Comparison of protein expression in plasma from nonylphenol and bisphenol A-exposed Atlantic cod (Gadus morhua) and turbot (Scophthalmus maximus) by use of SELDI-TOF

2006 ◽  
Vol 78 ◽  
pp. S25-S33 ◽  
Author(s):  
Bodil K. Larsen ◽  
Anne Bjørnstad ◽  
Rolf C. Sundt ◽  
Ingrid C. Taban ◽  
Daniela M. Pampanin ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Protein Expression ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Scophthalmus Maximus ◽  
Turbot Scophthalmus Maximus

The onset of exogenous feeding in marine fish larvae

Aquaculture ◽  
2007 ◽  
Vol 268 (1-4) ◽  
pp. 53-63 ◽  
Author(s):  
M. Yúfera ◽  
M.J. Darias
Keyword(s):  
Marine Fish ◽  
Fish Larvae ◽  
Exogenous Feeding ◽  
Marine Fish Larvae

scholarly journals Genomic Sequencing of Ranaviruses Isolated from Turbot ( Scophthalmus maximus ) and Atlantic Cod ( Gadus morhua )

2016 ◽  
Vol 4 (6) ◽  
Author(s):  
Ellen Ariel ◽  
Natalie K. Steckler ◽  
Kuttichantran Subramaniam ◽  
Niels J. Olesen ◽  
Thomas B. Waltzek
Keyword(s):  
Gadus Morhua ◽  
Atlantic Cod ◽  
Scophthalmus Maximus ◽  
Genomic Sequencing ◽  
Turbot Scophthalmus Maximus ◽  
Phylogenomic Analyses

Ranaviruses have been isolated from Atlantic cod ( Gadus morhua ) and turbot ( Scophthalmus maximus ) in Denmark. Phylogenomic analyses revealed that these two ranaviruses are nearly identical and form a distinct clade at the base of the ranavirus tree branching off near other fish ranaviruses.

The potential of liposomes as a nutrient supplement in first‐feeding marine fish larvae

1999 ◽  
Vol 5 (4) ◽  
pp. 251-256 ◽  
Author(s):  
Koven ◽  
Barr ◽  
Hadas ◽  
Ben‐Atia ◽  
Chen ◽  
...  
Keyword(s):  
Marine Fish ◽  
Fish Larvae ◽  
First Feeding ◽  
Nutrient Supplement ◽  
Marine Fish Larvae

scholarly journals First feed affects the expressions of microRNA and their targets in Atlantic cod

2016 ◽  
Vol 115 (7) ◽  
pp. 1145-1154 ◽  
Author(s):  
Teshome Tilahun Bizuayehu ◽  
Tomasz Furmanek ◽  
Ørjan Karlsen ◽  
Terje van der Meeren ◽  
Rolf Brudvik Edvardsen ◽  
...  
Keyword(s):  
Gadus Morhua ◽  
Developmental Stages ◽  
Atlantic Cod ◽  
Fish Larvae ◽  
Artemia Salina ◽  
Differentially Expressed ◽  
Next Generation Sequencing Data ◽  
Sequencing Data ◽  
First Feeding ◽  
Differentially Expressed Mirna

AbstractTo our knowledge, there is no report on microRNA (miRNA) expression and their target analysis in relation to the type of the first feed and its effect on the further growth of fish. Atlantic cod (Gadus morhua) larvae have better growth and development performance when fed natural zooplankton as a start-feed, as compared with those fed typical aquaculture start-feeds. In our experiment, two groups of Atlantic cod larvae were fed reference feed (zooplankton, mostly copepods, filtered from a seawater pond) v. aquaculture feeds: enriched rotifers (Brachionus sp.) and later brine shrimp (Artemia salina). We examined the miRNA expressions of six defined developmental stages as determined and standardised by body length from first feeding for both diet groups. We found eight miRNA (miR-9, miR-19a, miR-130b, miR-146, miR-181a, miR-192, miR-206 and miR-11240) differentially expressed between the two feeding groups in at least one developmental stage. We verified the next-generation sequencing data using real-time RT-PCR. We found 397 putative targets (mRNA) to the differentially expressed miRNA; eighteen of these mRNA showed differential expression in at least one stage. The patterns of differentially expressed miRNA and their putative target mRNA were mostly inverse, but sometimes also concurrent. The predicted miRNA targets were involved in different pathways, including metabolic, phototransduction and signalling pathways. The results of this study provide new nutrigenomic information on the potential role of miRNA in mediating nutritional effects on growth during the start-feeding period in fish larvae.

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