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Related Concept Videos

Energy Budgets00:51

Energy Budgets

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Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
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When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
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Speciation Rates01:07

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Overview
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Production Efficiency01:01

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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Primary Production01:06

Primary Production

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
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Interaction "nutrition-reproduction" in fish.

P Luquet1, T Watanabe

  • 1Station d'Hydrobiologie, I.N.R.A. Saint-Pée-sur-Nivelle, 64310, Ascain, France.

Fish Physiology and Biochemistry
|November 16, 2013
PubMed
Summary

Dietary manipulations significantly impact fish reproduction. Specific nutrient requirements, like proteins and fatty acids, vary by species and life stage, influencing broodstock success and offspring quality.

Area of Science:

  • Aquaculture nutrition
  • Fish reproductive physiology
  • Comparative animal nutrition

Background:

  • Gonad maturation and spawning alter fish feeding behavior and body stores, potentially causing metabolic issues.
  • Dietary interventions can modulate reproductive outcomes in captive fish broodstock.

Purpose of the Study:

  • To review the effects of diet manipulation on fish reproduction.
  • To highlight species-specific nutritional needs for broodstock.

Main Methods:

  • Literature review on dietary impacts on fish reproduction.
  • Analysis of nutritional requirements during different life stages and reproductive phases.

Main Results:

  • Restricted diets can delay maturation and reduce egg production.

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  • Broodstock exhibit altered nutrient utilization (carbohydrates, fats, proteins) compared to immature fish.
  • Specific requirements for vitamins, essential fatty acids (n-6), carotenoids (in Red Sea bream), and trace elements (manganese) are crucial for reproduction.

    • Conclusions:

    • Nutritional strategies must be tailored to species and reproductive stage for optimal broodstock management.
    • Further research is needed on male broodstock nutrition and specific micronutrient roles.