Feeding of Plaice (Pleuronectes Platessa L.) and COD (Gadus Morhua L.) Larvae

Nordeng, Hans; Bratland, Per

doi:10.1093/icesjms/34.1.51

Cited by 8 publications

(3 citation statements)

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“…Green food remains and algae have been found in the gut of several marine fish larvae collected from the sea (Lebour, 1919;Berner, 1959;Last, 1978aLast, , 6, 1979 including cod larvae (Wiborg, 1948;Nordeng & Bratland, 1971;Bainbridge & McKay, 1968;Last, 19786;Kane, 1984). The gut of cod larvae sampled from successful rearing experiments in lagoons contained an unidentified green mushy mass (Kvenseth & IZliestad, 1984).…”

Section: Introductionmentioning

confidence: 99%

Algae as first food for cod larvae, Gadus morhuaL.: filter feeding or ingestion by accident?

Meeren

1991

Journal of Fish Biology

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Cod larvae. Gadus morhua L., 2 4 days posthatch, were fed different species of algae in order to evaluate both rates and mechanisms of ingestion. The results were compared with cod larvae feeding on a natural assemblage of algae in a lagoon. Small algae (Nannochloris atomus Butcher, 1 4 pm) were found to enter the larval gut in accordance with drinking rate. In contrast, the cod larvae concentrated larger algae [Dunaliella salina (Dunal) Teodor. 6 10 pm] in the gut at rates from 492 to 7251 times the drinking rate. D. salina was captured in the slits between the visceral arches, and increased activity when the algae was added indicate that the cod larvae are active filter feeders during early larval stages. In the gut of cod larvae from the lagoon the fraction of algal material with diameter larger than 8 pm was 39.2% in 7-day-old larvae while, in 12-day-old larvae it had decreased to 12.6%. The most conspicuous characteristics of gut content in the youngest larvae were green spheres (10 pn) and a naked dinoflagellate (20 p). Short chains of the diatom Skeletonemu cosrarum (Greville) Cleve were also frequently found.

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Section: Introductionmentioning

confidence: 99%

Algae as first food for cod larvae, Gadus morhuaL.: filter feeding or ingestion by accident?

Meeren

1991

Journal of Fish Biology

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“…A great number of first-feeding larvae had phytoplankton in their guts in April. This is a common fmding in small larvae (Nordeng and Bratland, 1971;Ellertsen et al, 1980). Among the zooplankton prey group, copepod eggs (presumably Calanus finmarchicus eggs) were by far the most important food item for first-feeding cod larvae.…”

Section: Discussionmentioning

confidence: 96%

Reproduction of Faroe Plateau Cod: Spawning Grounds, Egg Advection and Larval Feeding

Gaard,

Steingrund

2000

Frit

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Faroe Plateau cod spawn mainly in two areas that lie close inside the tidal front that surrounds the Faroe Shelf. Eggs and larvae are advected in an anticyclonic direction around the Islands. Peak spawning is in the second half of March, and, thus, the majority of cod larvae start feeding in April. At this time, secondary production on the central shelf is still at a low level. However, over-wintered Calanus finmarchicus, which are advected from offshore onto the northern and western slope and shelf regions may spawn by April. Observations from April 1995 and 1999 showed that the firstfeeding cod larvae fed mainly on copepod eggs, which, based on their sizes, are presumed to be mainly C. finmarchicus eggs. Copepod nauplii were only of minor importance. The spawning areas of Faroe Plateau cod are close to the areas with the highest average egg productionof C. fmmarchicus during early spring. This results in a coherent advection of cod eggs, larvae, and food from the spawning ground. They are advected clockwise, in an easterly direction, onto the northern shelf region and are then dispersed throughout the central shelf area. As the cod larvae grow, they switch over to larger prey. Food observations in late May 1995showed mainly a mixture of copepod nauplii, young copepodites of C. finmarchicus, and various neritic copepod species (mainly Acartia and Temora), which were produced on the shelf during spring.

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“…The ingestion of unicellular algae by the larvae of marine fish is well documented, both from field studies (Lebour, 1919;Wiborg, 1948;Berner, 1959;Bainbridge & McKay, 1968;Nordeng & Bratland, 1971;Last, 1978aLast, ,b, 1979Kane, 1984;Kvenseth & Øiestad, 1984) and observations in the laboratory (Lasker et al, 1970;Scura & Jerde, 1977;Ellertsen et al, 1980;Moffatt, 1981;van der Meeren, 1991;Lein & Holmefjord, 1992;Reitan et al, 1994). Both van der Meeren (1991) and Reitan et al (1994) concluded from their measurement of ingestion rates, that the accumulation of algae in the guts of the larvae of cod Gadus morhua L., and halibut Hippoglossus hippoglossus (L.), was two to three orders of magnitude higher than predicted from passive uptake by drinking.…”

Section: Introductionmentioning

confidence: 99%

A study of the assimilation of fluorescent pigments of microalgae Isochrysis galbana by the early larval stages of turbot and herring

Tytler

Ireland

Murray

1997

Journal of Fish Biology

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The appearance of large supranuclear vacuoles in the enterocytes of 1-and 4-days post-hatch larvae of turbot and herring, respectively, revealed by the pinocytotic uptake of a fluorescent marker (FITCdextran), indicates a potential for the absorption of dissolved nutrients by the endotrophic stages of marine fish larvae. Ingestion of algal cells by turbot larvae was observed soon after hatching, but low level pinocytotic absorption of algal material was first seen during the second day. More extensive lysis of algal cells and pinocytotic absorption occurred 24 h later. Although lysis of I. galbana was shown to occur at low external osmolarities, it is unlikely that sufficiently low osmolarities present in the hind gut of turbot larvae explained the observed rupture of algae. Other mechanisms for digestion are discussed. In newly hatched herring larvae, algal cells were unable to pass beyond the constriction in the mid-gut caused by the yolk sac. When algal cells were eventually seen to pass into the hind gut, there was no evidence of algal digestion or absorption throughout the remaining endotrophic and early exotrophic stages of herring larvae, although pinocytosis was observed to occur mid-way through the endotrophic stage.1997 The Fisheries Society of the British Isles

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Feeding of Plaice (Pleuronectes Platessa L.) and COD (Gadus Morhua L.) Larvae

Cited by 8 publications

References 0 publications

Algae as first food for cod larvae, Gadus morhuaL.: filter feeding or ingestion by accident?

Algae as first food for cod larvae, Gadus morhuaL.: filter feeding or ingestion by accident?

Reproduction of Faroe Plateau Cod: Spawning Grounds, Egg Advection and Larval Feeding

A study of the assimilation of fluorescent pigments of microalgae Isochrysis galbana by the early larval stages of turbot and herring

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