Taurine-Dominated Feeding Attractant Mixture Induces Efficient Foraging in Neptunea cumingii

TL;DR

Scientists found that a mix of four chemicals, including taurine, can attract Neptunea cumingii snails as effectively as skate meat, offering a cheaper and more stable fishing bait.

Contribution

The study identifies a taurine-dominated chemical mixture that matches natural skate meat's effectiveness in attracting Neptunea cumingii.

Findings

A taurine, glutamate, inositol, and lactate mixture at 0.1 M concentration achieved 93.6% of natural skate meat's attraction efficacy.

Taurine alone reduced snail response time by 50% and increased displacement distance by 164.5%.

The four-chemical mixture outperformed single compounds by over 69% in behavioral parameters.

Abstract

The fishing industry for Neptunea cumingii relies on expensive and perishable skate meat as bait. The chemical basis of this attraction was unknown, preventing development of cost-effective alternatives. This study aimed to identify the specific chemicals in skate meat that attract the snails. We analyzed skate meat composition and tested snail behavioral responses to different compounds. Four key attractant chemicals were identified, including taurine, glutamate, inositol, and lactate. When these four chemicals were combined at optimal concentrations, the mixture reached ninety percent of the effectiveness of natural skate meat and performed sixty-nine percent better than any single compound alone. These findings identify the key chemical components responsible for attraction and show that synthetic formulations can serve as effective alternatives to natural bait. This research provides the foundation for producing affordable and stable artificial attractants, which could reduce fishing costs and support economically sustainable fishing practices.

The Neptunea cumingii (N. cumingii) fishing industry has long relied on expensive and perishable skate (Raja porosa) meat as bait. The unknown chemical attraction mechanism has hindered the development of artificial alternatives. This study employed untargeted metabolomics to analyze the chemical composition of skate meat and combined quantitative behavioral analysis to identify four key attractant compounds. These compounds were taurine, glutamate (Glu), inositol, and lactate. A standardized behavioral assessment system was established using the three parameters of response time, displacement distance, and movement velocity. This system enabled precise quantification of attraction efficacy. Concentration-gradient experiments determined the optimal concentration for all four compounds as 0.1 M. Taurine exhibited the strongest single-compound activity. It reduced response time by 50% and increased displacement distance by 164.5%. The mixture of four compounds at 0.1 M produced significant synergistic effects. The mixture achieved a comprehensive score of 93.6. This score approached that of natural skate meat at 94.8. All behavioral parameters improved by over 69% compared to the best single compound. These findings reveal the key attractant components in skate meat. They provide a scientific basis for developing efficient and stable artificial attractants. This research holds substantial value for promoting sustainable development of the N. cumingii fishing industry.

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