Effects of broodstock diets on growth of larval Atlantic cod (Gadus morhua L.)

Pérez-Casanova, Juan C.; Webb, Matthew; Lush, L.; Parrish, Christopher C.; Costa, Isabel; Hamoutene, Dounia

doi:10.1007/s10499-014-9864-5

Cited by 2 publications

(3 citation statements)

References 22 publications

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“…Some studies have confirmed that the physiological cycle can affect the RNA/DNA ratio (Érica, DiMarco, & Lee, 2006); notably, the diurnal cycle mainly affects the nutritional status of the individual because minor differences in metabolic activity in animals experiencing starvation can significantly affect performance (Clemmesen, 1994). Authors have indicated that there is some endogenous rhythm in the production of RNA (Chicharo, Chicharo, Lopez‐Jamar, Valdez, & Ré, 1998; Pérez‐Casanova et al., 2015). Other authors have reported that nucleic acid is a valid indicator of nutritional conditions and growth in squid paralarvae (Érica et al., 2006), which is consistent with the diel variation in the RNA/DNA ratios in red drum fish (Rooker & Holt., 1996).…”

Section: Discussionmentioning

confidence: 99%

Influence of feeding frequency on diurnal variations in liver and muscle RNA/DNA ratios in Misgurnus anguillicaudatus

Xie

2020

Aquac Res

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We investigated the effect of the feeding regimen (group 1: fed twice daily at 8:00 and 18:00 for 28 days followed by 5 days of fasting; group 2: fed twice daily at 8:00 and 18:00 for 28 days and then fed once daily at 8:00 for 5 days; and group 3: fed twice daily at 8:00 and 18:00 for 33 days) on the circadian rhythms of the RNA/DNA ratio in the liver and muscle of the loach Misgurnus anguillicaudatus. The experiment was carried out with a photoperiod of 14 hr (light):10 hr (dark), with light from 07:30 to 21:30, followed by sampling. Cosine rhythm analysis and parametric analysis revealed obvious diurnal variation regularity in all three groups. The amplitude and phase of diurnal regularity in the RNA/DNA ratios increased after feeding. The highest value in group 2 was higher than that in group 3. Correlation analysis showed a correlation coefficient between the RNA/DNA ratios of the two tissues of 0.85. The coefficients of variation in the maximum RNA/DNA ratio and two cycles of chi‐square values in liver tissue were lower than those in muscle tissue, but the stability of the ratio was more reliable and representative in liver than in muscle. These results suggest the occurrence of some altered circadian rhythms of the RNA/DNA ratios in the liver and muscle of the loach M. anguillicaudatus and that the best sampling time was after 4 hr of daily feeding.

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Section: Discussionmentioning

confidence: 99%

Influence of feeding frequency on diurnal variations in liver and muscle RNA/DNA ratios in Misgurnus anguillicaudatus

Xie

2020

Aquac Res

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“…The development of specific broodstock diet is a neglected area of research not only for Atlantic cod but also for most marine finfish species because running proper broodstock diet experiments are costly 184 . With larval rearing protocols for Atlantic cod standardized, efforts are now directed towards nutrition of cod broodstock 153,185‐188 . Traditionally, cod broodstock were fed with bait fish 60 ; however, the nutritional composition of trash fish is variable, difficult to transport and handle on farm and bring risks of disease transmission.…”

Section: Improvements In Different Production Cycles Of Codmentioning

confidence: 99%

“…184 With larval rearing protocols for Atlantic cod standardized, efforts are now directed towards nutrition of cod broodstock. 153,[185][186][187][188] Traditionally, cod broodstock were fed with bait With the current increasing interest in commercial production of cod, more attention is now directed in further development of a specific cod broodstock diet.…”

Section: Broodstock Dietmentioning

confidence: 99%

Development of cod farming in Norway: Past and current biological and market status and future prospects and directions

Puvanendran

Mortensen

Johansen

et al. 2021

Reviews in Aquaculture

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Atlantic cod is a historically abundant species in the North Atlantic region and has contributed to the prosperity of many nations. But a decline in stocks in the last century has prompted to initiate commercial farming of cod in captive conditions. Several approaches have been employed ranging from stock enhancement, capture‐based aquaculture and intensive cod farming. However, except for the enhancement efforts which were carried out for almost a century, efforts on other methods were intermittent coinciding with lower quotas. Intensive farming was attempted in Norway, Scotland, Ireland, Canada, Iceland and Faroe Islands in the 2000s. But it was carried out hastily to cash in the demand for cod in the market even though there were many biological knowledge gaps that are required for a successful aquaculture venture. The reasons for the failure of commercial farming in Norway during the 2000s were not only because of limited knowledge of the biology of cod but also the economic meltdown in Europe in 2008. Cod farming came to a halt; however, the Norwegian National Cod Breeding Program (NCBP) initiated in 2003 continued to operate and produced a fifth generation of a domesticated cod in 2019. Efforts to fill the gaps and the selective breeding for better growth and disease resistance within NCBP have improved the quality of the juveniles produced. We will discuss the past efforts and reasons for failure in farming of cod, how the current situation looks and the future direction in terms of cod biology, political atmosphere and market.

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Effects of broodstock diets on growth of larval Atlantic cod (Gadus morhua L.)

Cited by 2 publications

References 22 publications

Influence of feeding frequency on diurnal variations in liver and muscle RNA/DNA ratios in Misgurnus anguillicaudatus

Influence of feeding frequency on diurnal variations in liver and muscle RNA/DNA ratios in Misgurnus anguillicaudatus

Development of cod farming in Norway: Past and current biological and market status and future prospects and directions

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