Variants of SARS-CoV-2 have been detected globally since the beginning of the COVID-19 epidemic. As COVID-19 is being contained by physical measures, pharmaceutical repurposing, vaccination, and genomic/community surveillance, the emergence of variations of concern (VOCs) presents considerable problems. The Omicron variation (B.1.1.529) is one of the five VOCs of SARS-CoV-2 that is highly changed, infectious, and essential.

A new variant of the pandemic virus SARS-CoV-2 has been identified, which causes COVID-19; the variant now has a lineage designation of B.1.1.529 and is declared as a “variant of concern.”. The variant, formerly known as B.1.1.529 or Nu, is officially named “Omicron” by WHO.

ALSO READ: Crows are self-aware like humans and capable of conscious thought

This new variant is causing COVID-19 infections to surge again, though right now, fewer than 100 genomes of the variant have been collected from patients—there is still a lot to learn. Omicron now becomes the 5th Covid-19 mutation declared as a variant of concern.

This variant has a large number of mutations, some of which are concerning. Preliminary evidence suggests an increased risk of reinfection with this variant as compared to other VOCs.

The strain has been detected in several coronavirus cases in South Africa and is now believed to be in Europe.

The Delta variant is currently the world’s dominant COVID-19 variant.

First detected in India, it swept across the world, proving to be more contagious than previously dominant variations of the virus.

It spreads so easily because its spike protein is more adept at entering human cells than previous variants.

It took around two months for Delta to be labeled ‘of concern’ by WHO. Omicron, on the other hand, has received this classification within 72 hours of detection.

It becomes a variant of concern when there’s evidence that increased transmission or increased severity of the disease may be occurring or that public health measures, vaccinations, or treatments may have decreased effectiveness against it. 

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According to a study by German researchers and published in the journal Science, crows are self-conscious like us. They possess self-awareness, intelligence, and analytical skills that were believed to be inherent only in humans and a few other mammals.

It was posted in Vegazeta, that over time, more and more of the supposed pillars of human exceptionalism are falling apart.

“Occasionally, we extend these traits to primates or other mammals – species with which we share fundamental brain similarities. Over time, more and more of these supposed pillars of human exceptionalism are falling away,” highlight authors Andreas Nieder, Lysann Wagener, and Paul Rinnert.

Crows have a type of consciousness called primary consciousness, which is the ability to be aware of the world around them in the present. This is a more basic form of consciousness than the ability to think about one’s thoughts, which is considered a hallmark of advanced cognition.

ALSO READ: Sheepshead fish: A Fish with human-like teeth caught in the United States

They argue that animals’ consciousness does not depend on a standard cerebral cortex, because a brain, however different it may seem, can still share profound similarities. In the case of crows, they have 1.5 billion neurons and a great ability to solve problems.

The research also converges to the conclusion that any brain that has a large number of neurons connected in associative circuits favors behavioral flexibility and complexity.

Unlike the human brain, a crow is not structured in layers. “These results suggest that the neural bases that enable sensory awareness arose before the appearance of mammals or independently, at least in the avian lineage, and do not necessarily require a cerebral cortex.”

“It is possible that the consciousness of perception arose back then and has been passed down ever since. In any case, the capability of conscious experience can be realized in differently structured brains and independently of the cerebral cortex.”

This means primary consciousness could be far more common across birds and mammals than we’ve realized.

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The human-toothed fish has taken everyone by surprise. A photo of the Sheepshead fish was shared on Facebook this week by Jennette’s Pier, a fishing destination in Nag’s Head, North Carolina.

This fish is called a sheepshead due to several layers of teeth in its jaws to chew prey and its sheep-like mouth.

Archosargus probatocephalus, the sheepshead, is a marine fish that grows to 76 cm but commonly reaches 30 to 50 cm. It is deep and compressed in body shape, with five or six dark bars on the side of the body over a gray background. It has sharp dorsal spines.

ALSO READ: Supplementary Feeding in Fish with Respect to Modern Techniques

Sheepshead fish typically inhabit salty and mildly salted brackish water; however, during the winter months they can occasionally be found in freshwater environments as they search for warmer areas where rivers and springs flow into the ocean.

To feed on hard-shelled prey, sheepshead fish develop squarish, human-like teeth as they mature. According to the IUCN, when sheepshead fish reach a length of around 2 inches (5 cm), they begin to consume hard-shelled animals like molluscs and barnacles, but as juveniles, they consume any soft-bodied animals they can find as well as a variety of small, shelled animals, including crustaceans a few millimetres long, like ostracods.

The hunter who caught the rare fish said that he immediately hoped that I would catch it when he saw the sheephead fish in the water.

The California sheephead (Semicossyphus pulcher), a fish species with the same name found on the western coast of North America, should not be confused with sheepshead fish. Despite having teeth, the two fish species are not closely related and are members of distinct families.

There is no threat to the sheepshead fish. At its most recent assessment in 2011, the IUCN determined that the species should be classified as “Least Concern”—a conservation category for species with extremely low extinction danger. With sustainable populations, the species is widespread and plentiful over much of its range.

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Fish is considered a very nutritious food and it is one of the main sources of protein providing 26.2% of animal meat and is a growing food source in Asia and in developing countries. Indian Major Carps, such as Catla catla, Labeo rohita, and Cirrhinus mrigala are the main candidate species of South Asia known in the pond culture system for a long time. Polyculture of these species results highest per acre production. This is mainly due to their compassionate behavior, living together in the same pond without competition.

Good nutrition in animal production systems is essential to economically produce a healthy, high quality product. In fish farming, nutrition is critical because feed represents 40-50% of the production costs. Fish nutrition has advanced dramatically in recent years with the development of new, balanced commercial diets that promote optimal fish growth and health.

Nutritional quality and organoleptic acceptability in terms of color, texture, smell, flavor, and appearance may be affected by the environmental degradation and quality of nutrition and feed provided during culture, especially in semi-intensive and intensive culture systems. The attributes of off-flavor of freshwater fish reared under different water qualities and nutritional treatments, with special reference to consumer acceptance, other than conventional individual characteristics such as flavor, taste, and appearance.

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Prepared or artificial diets may be either complete or supplemental.  Complete diets supply all the ingredients (protein, carbohydrates, fats, vitamins, and minerals) necessary for the optimal growth and health of the fish. Most fish farmers use complete diets, those containing all the required protein (18-50%), lipid (10-25%), carbohydrate (15-20%), ash (< 8.5%), phosphorus (< 1.5%), water (< 10%), and trace amounts of vitamins, and minerals.  When fish are reared in high-density indoor systems or confined in cages and cannot forage freely on natural feeds, they must be provided a complete diet.         

Commercial diets are manufactured as extruded (floating or buoyant) or pressure-pelleted (sinking) feeds. Both floating and sinking feed can produce satisfactory growth, but some species prefer floating, others sinking.  Shrimp, for example, will not accept a floating feed, but most fish species can be trained to accept a floating pellet.

The development of new species-specific diet formulations supports the aquaculture industry as it expands to satisfy increasing demand for affordable, safe, and high quality fish. On the basis of easy availability, compatibility, affordability, and less competition, the diet resulted in the best growth and total length increase, as well as the highest fish survival.

Importance of Supplementary Fish Feeding

Supplemental feeding can improve the health and size of fish in your pond. Feeding should be considered supplemental and not the sole food source. Having a balanced forage base in your pond should be the sustaining goal and feeding should be done to augment the natural food sources in your pond. Before starting a feeding program, you need to consider the fish species you have in your pond, the size of the fish in your pond, the dietary requirements, the type of feeding you will do, and the oxygen supply in the water to make sure your feed investment doesn’t go to waste.

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