Hard-Shelled Razor Clam Breeding via Electronic Hardness Testing
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Solution Overview
Problem
Razor clams have thin and fragile shells, making them susceptible to damage during harvesting and transportation, leading to high breakage rates and reduced market value, which hinders the sustainable development of the industry.
Innovation Solution
A breeding method is developed to create a new variety of hard-shelled razor clams through heritability estimation, broodstock selection using an electronic hardness tester, artificially-induced spawning, and strain purification to enhance shell hardness and growth traits, utilizing 5-hydroxytryptamine for spawning and repeated generations for stable heritability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If razor clams are bred with traditional methods focusing on growth and stress resistance, then growth rate and stress resistance are improved, but shell hardness remains insufficient
Solution Approach 1:
The patent changes the breeding parameter focus from growth rate and stress resistance to shell hardness. By selecting broodstocks with high shell hardness and breeding for multiple generations, the shell hardness parameter is significantly improved while maintaining other traits, directly resolving the contradiction between shell strength and breakage resistance.
Solution Approach 2:
The patent implements a feedback mechanism by measuring shell hardness of offspring and using it as the selection criterion for the next generation of broodstocks. This continuous feedback loop ensures that shell hardness is progressively improved across generations, effectively reducing breakage rates while maintaining other important traits.
2Ease of operation
If razor clams have thin and fragile shells, then they require careful intermediate breeding technologies such as seed washing, separation and seeding, but this increases operational complexity and loss
Solution Approach 1:
The patent applies preliminary action by breeding hard-shelled varieties before the intermediate breeding stage. The enhanced shell hardness is established in advance through selective breeding, so that when seed washing, separation and seeding operations are performed, the clams are already resistant to damage, reducing losses and simplifying operations.
3Object-affected harmful factors
If razor clams have thin shells, then they are susceptible to predator attack and bioturbation, but protecting them requires more complex breeding interventions
Solution Approach 1:
The patent changes the breeding parameter to focus on shell hardness, which directly improves resistance to predator attack and bioturbation. This single parameter change provides comprehensive protection against multiple harmful factors without requiring complex breeding interventions, as the enhanced shell hardness naturally defends against various threats.
4Strength
If razor clams have thin and fragile shells, then harvesting and transportation cause near 10% damage, but improving shell hardness through breeding requires multiple generations
Solution Approach 1:
The patent uses feedback by continuously measuring shell hardness and selecting the hardest individuals for breeding. This accelerates the genetic improvement process, achieving significant shell hardness enhancement in fewer generations than traditional breeding methods, thus reducing the time loss while maintaining effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in razor clams with significantly increased shell hardness and growth advantages, reducing breakage rates and enhancing industry sustainability by promoting efficient harvesting and transportation, with a proven market potential for the new variety.
Implementation Method 1
combining injection of 5-hydroxytryptamine via foot with flowing water stimulation to perform artificially-induced spawning
Data Source
AI summary
The present invention provides a breeding method of a new variety of hard-shelled razor clams, comprising the following steps: a. Estimating the heritability of shell hardness trait: constructing full-sib families to estimate the heritability of the growth and shell hardness traits of the razor clams; b. Selecting individuals with hard shells from basic population using an electronic hardness tester of material mechanics as the broodstock clams; c. Artificially-induced spawning; d. The offspring grow-out; e. Purification of the new strain: with the new strain of hard-shelled generation 1 adults obtained in step d as broodstocks, repeating the steps c and d several times to obtain a new variety of razor clams with hard shells, and the shell hardness trait of razor clams has stable heritability.