Tag #Fish

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nrc.nl

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Jul 10, 07:14

Hovering Fish Expend Twice the Energy of Resting

A new study in PNAS reveals that hovering, or stationary positioning, in fish unexpectedly doubles their energy consumption compared to resting, irrespective of swim bladder presence; elongated fish expend even more energy due to body shape.

Hovering Fish Expend Twice the Energy of Resting

A new study in PNAS reveals that hovering, or stationary positioning, in fish unexpectedly doubles their energy consumption compared to resting, irrespective of swim bladder presence; elongated fish expend even more energy due to body shape.

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What is the energy cost of hovering in fish, and what are the immediate implications for their physiology and behavior?

A recent study published in PNAS reveals that hovering, a behavior where fish remain stationary in the water column, requires significantly more energy than previously thought. Researchers found that hovering typically doubles a fish's oxygen consumption compared to resting, increasing energy needs and food requirements. This higher energy expenditure is consistent across various fish species, despite differences in body shape and the presence of a swim bladder.

elpais.com

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Feb 6, 10:10

Brain Microbiome Found in Fish Sparks Debate on Alzheimer's Origins

Immunologist Irene Salinas's study found bacteria in the brains of healthy fish, challenging the assumption of a sterile brain environment and sparking debate about the existence of a human brain microbiome and its role in neurodegenerative diseases like Alzheimer's.

Brain Microbiome Found in Fish Sparks Debate on Alzheimer's Origins

Immunologist Irene Salinas's study found bacteria in the brains of healthy fish, challenging the assumption of a sterile brain environment and sparking debate about the existence of a human brain microbiome and its role in neurodegenerative diseases like Alzheimer's.

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Good Health and Well-being

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What are the main arguments for and against the existence of a brain microbiome in humans, and what evidence supports each side?

The debate around a brain microbiome is fueled by studies finding bacterial and viral genetic material in human brains, particularly those with Alzheimer's. However, contamination and the weakening of the blood-brain barrier with age complicate the interpretation of these findings. The fish study provides evidence supporting the existence of a brain microbiome, at least in fish, but challenges remain.

nbcnews.com

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Nov 6, 04:23

Fish Tank Guide: Expert Tips and Product Recommendations

Expert advice on setting up and maintaining a fish tank, including product recommendations, tank cleaning, and fish care.

Fish Tank Guide: Expert Tips and Product Recommendations

Expert advice on setting up and maintaining a fish tank, including product recommendations, tank cleaning, and fish care.

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What are some easy fish for beginners?

The best fish for beginners are goldfish in a large tank, tetras, or guppies (expecting many babies). Saltwater tanks and heavily stocked tanks require the most care.

forbes.com

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Mar 29, 16:12

Bigmouth Buffalo's Exceptional Longevity Defies Aging Norms

The bigmouth buffalo (Ictiobus cyprinellus), a North American freshwater fish, lives for over 120 years, with some populations showing a 50+ year gap in new generations due to specific environmental requirements for reproduction, challenging typical fish population dynamics and exhibiting negligible...

Bigmouth Buffalo's Exceptional Longevity Defies Aging Norms

The bigmouth buffalo (Ictiobus cyprinellus), a North American freshwater fish, lives for over 120 years, with some populations showing a 50+ year gap in new generations due to specific environmental requirements for reproduction, challenging typical fish population dynamics and exhibiting negligible...

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How does the bigmouth buffalo's reproductive strategy of episodic recruitment influence its population structure and longevity?

This longevity is linked to episodic recruitment, a reproductive strategy triggered by specific environmental conditions. The fish's ability to survive for over a century increases the chances of successful reproduction during these rare windows. The Rice Lake population's age structure highlights the impact of environmental factors hindering successful reproduction.

bbc.com

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Jan 10, 22:09

Bigmouth Buffalo Fish: Record Lifespan, Population Crisis

Bigmouth buffalo fish (Ictiobus cyprinellus) in North America can live over 127 years, a record for freshwater bony fish; however, despite successful spawning, almost no young fish survive past summer, threatening the species' survival due to predation, habitat destruction, and possibly other unknow...

Bigmouth Buffalo Fish: Record Lifespan, Population Crisis

Bigmouth buffalo fish (Ictiobus cyprinellus) in North America can live over 127 years, a record for freshwater bony fish; however, despite successful spawning, almost no young fish survive past summer, threatening the species' survival due to predation, habitat destruction, and possibly other unknow...

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What is the primary factor threatening the bigmouth buffalo population despite its exceptional longevity?

Recent research reveals that bigmouth buffalo fish, inhabiting North American freshwater, can live over 127 years—a record for freshwater bony fish. Unlike most species, their biological activity doesn't decrease with age, and older fish exhibit better stress response and immunity. However, despite successful spawning, almost no young fish survive past summer, leading to concerns about population decline.

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