Method for testing fish feeding competitiveness

Abstract

A method for testing fish feeding competitiveness includes selecting domesticated fishes and wild fishes, which are the similar in size, and temporarily culturing the fishes in two indoor culture tanks according to variety difference. The method is characterized in that maximum feed intake of each of the single domesticated fish and the single wild fish is measured, and time of operating sinking particular feed is measured; the fishes are fed with the feed half of the minimum feed intake of each single fish by single-particle successive feeding during testing, and the feeding time interval oftwo particles is maintained to be more than the maximum swallowing time; the experimental fishes are fed with the sinking particulate feed to determine the minimum feed intake and the feeding time interval on the third day before formal testing of competitiveness, so that the experimental fishes adapt to a testing environment; the feeding way continues, and a photographic recording system is usedto record feeding behaviors and aggressive behaviors of the domesticated fishes and the wild fishes before and after feeding and during feeding; and the video material is obtained to observe and count up the feed intake, activity frequency, aggressive interaction frequency and retention period at a feeding area.

Description

Technical field [0001] The invention relates to a method for obtaining fish feeding behavior data. Background technique [0002] Fish finally obtain food by searching, discovering, capturing and ingesting. The feeding behaviors of fish are diverse, and the strategies used by the fish to perform the above actions directly affect the success rate of feeding and even their own fitness. Because of the growth of fish, it becomes meaningful to study the relationship between feeding behavior and fitness. The same animal needs similar food resources, and the food in natural water bodies is often unevenly distributed. When food resources are limited, there will be interference and competition among individuals. If the food eaters are different in competitiveness, then the best feeding strategy depends on their dominance level. This kind of social relationship is common in many fish. Fighting behavior is one of the most important factors in establishing social status. [0003] The resear...

AI Technical Summary

Problems solved by technology

However, there are obvious shortcomings in the above measurements: ① lack of convincing quantitative index parameters; ② effective anti-interference measures are not taken to ensure the reliability of data; ③ lack of unified measurement specifications

The above shortcomings all have a negative impact on the accurate measurement of the hierarchical relationship of fish communities, making it difficult to accurately assess the competitiveness of fish, interfering with the selection of domesticated fish in artificial release, the determination of release locations and release seasons, and affecting artificial release. The establishment of the effect evaluation system