Newcomers to the aquaculture industry need to be cautious—next year’s aquaculture market conditions could be about to change!


Release time:

2020-11-25

Over the past two years, crawfish farming has been nothing short of booming—so hot that it’s practically exploding. Everywhere you look, people are scrambling to find land for raising crawfish; to outsiders, it seems as though they’re not even looking for land—they’re just chasing money. As a result, land rental prices have been climbing steadily. In many key crawfish-farming regions, land rents have soared beyond 1,000 yuan per mu, and in some cases even higher. These skyrocketing costs have significantly increased both the upfront investment and the risks associated with later-stage farming. Right now, whether it’s those working away from home or successful entrepreneurs with some capital, everyone wants to return to their hometowns and dive into the crawfish farming business, eager to grab a piece of the action. But is the reality really as rosy as they imagine? Can raising crawfish really bring in big money—and fast? Unfortunately, many people may be in for a rude awakening. The enormous initial capital investment, the long payback period, coupled with the need for specialized farming techniques, experience, effective management, and the ability to withstand substantial farming risks—all these factors mean that most newcomers end up losing their entire investment.

Over the past two years, crawfish farming has been nothing short of booming—so hot that it’s almost explosive. Everywhere you look, people are scrambling to find land for raising crawfish; to outsiders, it seems as though they’re not even looking for land—they’re just chasing money. As a result, land rental prices have been steadily climbing. In many key crawfish-farming regions, land rents have soared beyond 1,000 yuan per mu, and in some cases even higher. This has significantly increased both the upfront costs and the risks associated with later-stage farming operations.

Right now, whether they’re working outside their hometown or have already achieved entrepreneurial success and accumulated some capital, many people are eager to return home and dive into the crawfish farming industry—eager to grab a piece of the action. But is the reality really as rosy as they imagine? Can raising crawfish really bring in big money—and fast? Unfortunately, this may come as a disappointment to many: the huge upfront capital investment, the long payback period, coupled with the need for specialized farming techniques, experience, effective management, and the ability to withstand substantial farming risks—all these factors often leave most newcomers with nothing to show for their efforts.

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The relationship between water convection and dissolved oxygen levels in aquatic bodies: The introduction of an aeration device can effectively regulate dissolved oxygen levels.

Although fish floating to the surface can be caused by a variety of factors, in addition to excessive stocking density, overloading the total fish biomass, and poor water quality, the convective properties of water are also a major factor that cannot be overlooked. Simply put, when water temperature is low, its specific gravity (or density) increases, causing it to sink; conversely, when water temperature is high, its specific gravity (or density) decreases, making it float upward. Understanding and mastering the principles of water convection will greatly facilitate the smooth operation of aquaculture. On warm days, after being heated by the sun during the day, the warmer, lighter water tends to stay on top. As the sun sets and the air temperature begins to drop, the upper layer of water cools down, increasing its density, and gradually starts to sink. If the nighttime temperature remains relatively high, the water cools down slowly, and the upper layer won't reach the bottom of the pond until early morning. This is one of the main reasons why oxygen levels tend to drop sharply from late night into early morning on hot days. However, if a heavy rainstorm occurs in the evening, the situation changes dramatically. The cold, heavy rainwater quickly sinks to the bottom of the pond, stirring up sediment, leftover feed, fecal waste, biological residues, and other organic matter from the pond bottom and bringing them into the middle and upper layers of the water. These harmful organic substances rapidly deplete the dissolved oxygen in the water. Before dawn even breaks, the dissolved oxygen in the water may be completely used up, leaving the fish vulnerable to oxygen depletion and causing them to float to the surface—a phenomenon known as "floating and surfacing." Therefore, sudden heavy rainfall in the evening or at night can also lead to oxygen depletion and fish floating to the surface.

2020-11-12