What role does the light of underwater fishing lights play for fishing?

The Misleading Ideas About underwater fishing lights

Fishing lights were first used for fishing, mainly for the needs of watching drift and operating lighting. With the rise of Heikeng Big Cannon Pond, the research and use of fishing lights in the fishing circle has reached an unprecedented height, and various publicity about the brightness, color, and utility of lights are rampant. Among them, the most confusing ones are mainly as follows: View:

The first one: the light can achieve a good effect of attracting underwater fishing lights

This point of view stems from the research on the phototaxis of fish and the resulting marine night light fishing technology. Many people think that since fish can be attracted by lights in the sea, it is also possible when fishing. Unfortunately, there is a misunderstanding in this view. Ocean light fishing has several distinctive features: first, it is effective for fish species with group activities such as mackerel, blue round squid, and squid; second, it is effective for fish of a specific individual size, especially small fish; third, light fishing is effective. There is a distinction between water lights and underwater lights, and there are strict regulations on the arrangement and use of lights. Simple fishing lights cannot achieve the effect of light trapping lights.

In the article “The Effect of Fish Sensory Functions on Feeding Behavior”, we introduced that vision plays a leading role in fish feeding at close range. In view of this, many people think that if fishing at night can create In a bright environment, the fishing effect will be greatly improved. This kind of view is somewhat confusing, but it is not known that it has made a common-sense mistake-the law of fish’s day and night activities was formed during the long process of biological evolution, and it is most suitable for their behavioral law. Once this law is formed, It will not easily change with changes in external factors. Taking feeding as an example, under the succession of sensory functions such as smell, taste, touch, etc., it is not difficult for fish to eat at night. Using artificial light to change the habit of fish eating at night may be beneficial to some specific fish species. It has a certain effect, but the effect is not obvious for most fish species, and sometimes it may even produce adverse effects.

The second type: the brighter the underwater fishing lights, the better

This point of view is actually an extension of the first point of view. From the perspective of drifting, this view is correct, but from the perspective of feeding, too high brightness may have the opposite effect. The reason for this is that, firstly, different fish species have different phototaxis characteristics, and have different adaptability to light of different brightness, and the brighter the better; secondly, the fishing light is used as a spotlight source, with concentrated light and small spots , and the light of the sun and even the moon, especially the scattering and diffusion characteristics of the light are obviously different, so it is difficult to achieve the effect of natural light.

The third type: the green light has the least impact on fishing

Different from the idea of fishing friends in Da Pao Pond trying to lure fish through lights, many fishermen who play leisure and wild fishing, especially those who like to fish big things, focus on how to use lights to minimize the impact of lights on fishing. Impact. In their view, the use of lights is against the natural habits of fish. Excessively bright lights, adjustment of the irradiation angle, and frequent switching of fishing lights will all have a negative impact on fishing. Among all the research topics, the research on light color is the most in-depth, and it is also the most concerned by fishing friends. Because of this, the green light has begun to go to the altar.

Phototaxis of fish:

When fishing for different fish species, we have differences in the choice of light brightness and color. As mentioned above, high-brightness cannon lights can be used to fish certain fish species, while electronic drift or fluorescent sticks can only be used to fish certain fish species. All of this is related to the phototaxis of fish.

Positive and negative phototaxis

The phototaxis of fish refers to the movement characteristics of fish under the stimulation of light. The movement toward the light source is positive phototaxis, and the movement away from the light source is negative phototaxis (also called phototropism and backlight). In short, That is, fish with positive phototaxis like light, and fish with negative phototaxis hate light.

The research on the phototaxis of fish can be divided into two categories: natural light (such as sunlight and moonlight) and artificial light source. Fish’s likes and dislikes of artificial light source are most closely related to fishing. Even for fish species with positive phototaxis, when faced with different light intensities and colors of light sources, their responses will be different, and they will show gradual changes. Under normal circumstances, when stimulated by light, the fish’s response will be divided into three stages:

In the first stage, the fish are attracted by the light and actively swim to the vicinity of the light source;

In the second stage, fish stay and move in the light source area;

In the third stage, the light source area is freed due to discomfort caused by light intensity, irradiation time, and light source color.

Phototaxis characteristics of different fish species

Under natural conditions, the types of light that mainly affect fish feeding behavior are sunlight and moonlight. The appearance of sunlight and moonlight has relatively strong regularity. Under the long-term influence of these laws, different fish species will form different phototaxis characteristics. For example, small fish grow rapidly under sufficient light conditions; A large amount of food is eaten, and the food intake drops sharply at night, or even stops eating; some deep-water fish species or nocturnal fish species are basically in a dormant state of feeding during the day, and gradually become active at night, etc. According to different phototaxis characteristics and active periods, freshwater fish species can be divided into three categories: diurnal, evening and nocturnal fish species.