Cultivation trials with turbot (Scophthalmus maximus)

Purdom, C. E.; Jones, A.; Lincoln, R.F.

doi:10.1016/0044-8486(72)90021-x

Cited by 47 publications

(16 citation statements)

References 4 publications

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“…It was evident that the daily food intake of young herring varied considerably from day to day. Variations in daily food intake have been observed in almost all the fish species studied (Moore, 1941 ;Brown, 1946~;Pandian, 1970;Purdom et al, 1972). According to Brown (1957) such variations are due to changes in the appetite of the fish which change from day to day.…”

Section: Discussionmentioning

confidence: 98%

“…Most of the work on food intake, food conversion and growth of marine fish has been done on species of the families Pleuronectidae (Dawes, 1930a, b;Hatanaka et al, 1956~. 6 ;Colman, 1970;Pandian, 1970;Edwards et al, 1971;Purdom et al, 1972) and Salmonidae (Baldwin, 1956;Brown, 1957;Brett et al, 1969). The only work of this kind on active schooling species is that of Hatanaka et al (1957), on the food consumption, growth and food conversion of young Japanese mackerel.…”

Section: Introductionmentioning

confidence: 99%

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Laboratory studies on food intake, growth and food conversion of young herring, Clupea harengus (L.)

Silva

Balbontín

1974

Journal of Fish Biology

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Food intake, growth and food conversion of young, 0-group herring were studied at two temperatures and feeding regimes over a period of 19 weeks. The food intake of fish fed to satiation twice daily showed considerable variation. Food intake per fish at 14.5" C was about three times that at 6.5" C, and was generally much higher than in most other species of fish studied. The mean increase in wet weight over the 19-week period was 0.581 g/week at 14.5" C and 0.236 g/week at 6.5" C in fish fed to satiation and 0094 g/week at 62" C and a ration of 1.3% of the body weight. Growth depensation was found to occur even in fish fed to satiation. The changes in specific growth rate, that is the percentage increase in weight/day, showed similar trends at different temperatures and food regimes. The mean conversion efficiency of fish on a ration of 1.3 % at 6.2" C was higher than that of fish fed until satiation, at 145 and 6.5" C. The conversion efficiency of fish fed to satiation at 14.5" C showed a distinct decrease with increasing weight while at 6.5' C such a clear trend was not observed. In general, the conversion efficiency of young herring were found to be much lower than that of most other species studied. The weight exponent ofthe quantitativerelationship between food intake and body weight at 14.5" C was 0.744. The total metabolic expenditure at 14-5" C, calculated using Winberg's (1956) ' utilization coefficient ', gave a weight exponent of 0.773.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Laboratory studies on food intake, growth and food conversion of young herring, Clupea harengus (L.)

Silva

Balbontín

1974

Journal of Fish Biology

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“…Those studies which have tracked growth have generally been motivated by aquacultural objectives, such as assessing the effect of size-grading on production (Purdom et al 1972. Bowers 1974, Purdom 1974, which obscure patterns of variation.…”

Section: Variation In Sizesmentioning

confidence: 99%

Variation in and among early life history traits of laboratory-reared winter flounder Pseudo-pleuronectes americanus

Chambers¹,

Leggett²,

Brown³

1988

Mar. Ecol. Prog. Ser.

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ABSTRACT. We analyzed variation in and among early Life history traits of laboratory-reared winter flounder Pseudopleuronectes americanus. We measured lengths and ages at hatching and metamorphosis, lengths at 2 wk intervals through the larval period and into the first 3 wk of the juvenile period, and after 23 wk of juvenile life. Variation in traits was quantified and compared by the coefficient of variation (CV = SD/mean). CVs for lengths-at-ages increased from hatching (0.03) to an asymptotic value of = 10 % by 2 to 4 wk after first feeding. There were 2 peaks in variation in lengths-at-age during the early life history; one a t Week 4 (the approximate midpoint of the larval period) and another Week 10 (during the latter portion of the metamorphic window and early juvenile life). These may reflect commensurate changes observed in growth rates. Variation In length at hatching and metamorphosis was relatively low (3.0 and 5.3 % , respectively), and less than variation in age. Lengths-at-transitions were also less variable than lengths at fixed ages during the larval and juvenlle periods. These findings imply a target size for life period transitions. Length and age a t metamorphosis were positively correlated, as were sequential average lengths calculated from fortnightly measures. Length and a g e a t metamorphosis, and growth and developmental rates through the entire larval period, were positively correlated when calculated from the bivarlate measure of individuals. The pattern of variation in and correlations among early llfe history traits established in the larval period appears to propagate through metamorphosis and into early juvenile life. The population consequences of these associations, and their potential use in analyzing the results of early Life history studies, are discussed.

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“…In DecemberApril fish growth comes nearly to a standstill. Similar to that growth rate was established for farmed turbot (Purdom et al 1973;Iglesias et al 1985). However, farmed turbot reach a greater length per year, as in autumn and winter their growth rate does not slow down.…”

Section: Discussionmentioning

confidence: 97%

The Peculiarities of Turbot (Psetta Maxima L.) Biology and their Role in the Ecosystem of the Baltic Sea Coastal Zone of Lithuania

Stankus

2003

Acta Zoologica Lituanica

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Turbot growth in length and weight was represented by von Bertalanffys equations for females and males separately. Relative and absolute turbot fecundity was established, gonad maturation cycle as well as biochemical-physiological changes in the course of the year were studied. The investigation of turbot nutrition resulted in the establishment of the most important food components, monthly and annual rations. Analysis of turbot nutrition depending on fish length and sex was conducted separately. The impact of commercial fishing on turbot population, i.e. changes in the spawning school structure, juveniles and the CPUE index, was studied.

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Cultivation trials with turbot (Scophthalmus maximus)

Cited by 47 publications

References 4 publications

Laboratory studies on food intake, growth and food conversion of young herring, Clupea harengus (L.)

Laboratory studies on food intake, growth and food conversion of young herring, Clupea harengus (L.)

Variation in and among early life history traits of laboratory-reared winter flounder Pseudo-pleuronectes americanus

The Peculiarities of Turbot (Psetta Maxima L.) Biology and their Role in the Ecosystem of the Baltic Sea Coastal Zone of Lithuania

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