Transplant Fish Production Method for Surrogate Broodstock

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Solution Overview

Problem

Existing surrogate broodstock technology is limited to using fish species closely related to the donor, restricting its application to only a few suitable combinations for obtaining sterile hybrids.

Innovation Solution

The method involves selecting a donor fish species and two other fish species that can form a sterile hybrid, producing this hybrid, and then transplanting the donor fish's reproductive cells into the hybrid to create a transplant fish that can efficiently produce donor gametes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If surrogate broodstock technology uses fish species closely related to the donor, then the transplantation of reproductive cells is successful, but the range of applicable fish species is limited

Engineering Contradiction:

Improvesuccess rate of reproductive cell transplantationVSAvoidrange of applicable fish species

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The invention changes the key parameter of species relatedness from 'closely related' to 'distantly related species that can form sterile hybrids'. This parameter change allows the technology to be applied to a broader range of fish species while maintaining transplantation success through the sterile hybrid condition that prevents rejection of transplanted cells

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a universal platform for surrogate broodstock technology that can be applied across different fish species families. By using sterile hybrids as recipients, the system becomes universally applicable to any donor species where a sterile hybrid can be created, significantly expanding versatility while maintaining reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Quantity of substance

If complete aquaculture is implemented for fish species requiring large breeding facilities, then sufficient gametes can be produced, but the space and labor requirements increase greatly

Engineering Contradiction:

Improveamount of gametes producedVSAvoidbreeding facility size and labor requirements

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The invention introduces sterile hybrid fish as intermediary carriers that perform the gamete production function. Instead of requiring large facilities to breed donor species directly, the sterile hybrids serve as mediators that can be maintained in smaller facilities while still producing sufficient donor-derived gametes through the transplanted reproductive cells

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention creates a functional copy of the donor's reproductive system within the sterile hybrid. The transplanted reproductive cells from the donor are copied and proliferated in the hybrid recipient, allowing gamete production without needing to maintain the original donor species in large breeding facilities

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250113807A1Transplant Fish Production Method, Transplant Fish, Hybrid Fish Species Production Method, and Hybrid Fish Species

Publication Date: 2025.04.10 NISSUI CORPORATION

AI summary

The transplant fish production method includes selecting a donor fish species, selecting first and second fish species which are a combination that could be sterile, producing a hybrid fish species of the selected first fish species and second fish species, and transplanting reproductive cells of the donor fish species into the produced hybrid fish species.