Breeding and Husbandry Techniques for the Chinese Giant Salamander (Andrias davidianus)

Breeding technology for broodstock selection involves choosing individuals of different sexes and origins from the same region as parents. The feed suitable for breeding should be diversified, mainly consisting of feed that is high in protein, low in fat, low in calories, and rich in trace elements. One month before and after the breeding period, feed that is high in protein, high in fat, and high in calories should be provided.

Feed selection and proportioning experiments involve feeding different aquaculture ponds with different feeds, and conducting trials with different combinations to determine the optimal feed plan and the best nutritional structure for the ecological breeding of the giant salamander. By mastering the most suitable feed and nutritional combination for different periods of the giant salamander, the sperm quality of male broodstock can be improved, and the egg-bearing capacity of female broodstock can be increased.
 

Essential factors:

1. Avoid inbreeding. Selecting parents of different sexes and origins from the same region can effectively prevent inbreeding;
2. Choice of feed. Choose feeds that are more easily obtained and have comprehensive nutritional components, such as grass carp, silver carp, loach, shrimp, frogs, pork, and pig liver, etc.
3. Feed processing. Live fish should be freshly killed, and inedible parts such as heads, bones, and spines should be removed; pork and other meats should have fat (if any) removed and cut into long strips weighing about 50 to 100 grams. Dead bait should be soaked in a 30% saltwater solution for 10 minutes; live bait should be soaked in a 2-3 ppm chlorine dioxide solution for 10 minutes.
4. Feeding of feed. Feed should be provided on a regular schedule, with consistent quality, and in fixed quantities. Dead bait should be offered every three days, around 6 pm, with the standard that it should be consumed within one hour. Live bait should be fed at 5% of the total weight of the giant salamanders in each area, with discretion to increase the amount as appropriate.
 

By recording the feeding, weight gain, activity, ovulation, and fertilization of the giant salamander (see attached figures). It was found that Group B had a significantly higher feeding efficiency than the other two groups, indicating that the giant salamander will turn to dead bait with lower predation difficulty when hunting live prey is challenging. Data from Group A show that the giant salamander gains weight quickly when fed a diet high in protein and fat for a long period, but has a low ovulation and fertilization rate. In combination with the analysis of the main nutritional components of various baits, it is suitable for the giant salamander's bait to be diversified, mainly consisting of baits that are high in protein, low in fat, low in calories, and rich in trace elements, such as various fish, loach, shrimp, crabs, frogs, etc. One month before and after the breeding period, appropriately high protein, high fat, and high calorie foods can be fed, such as various fish and poultry meat and internal organs, which is beneficial for the giant salamander to accumulate energy before breeding and to recover and overwinter after breeding.
 

Breeding area mimicking wild habitat environment

Addressing the existing technical challenges, namely the differences between ecological breeding environments and wild habitats, and the low natural reproductive capacity of the giant salamander, characterized by slow growth, late sexual maturity, and low survival and breeding rates. A method for ecological breeding suitable for the giant salamander, based on the environmental factors of its natural habitat, is provided.

The ecological imitation environment is established based on the ecological and environmental factors of the giant salamander's natural habitat, and the selection of the reference object for this ecological environmental factor model is crucial.

After long-term research and discussions among scholars, we have established an environmental factor model based on geographical and climatic factors, river section influence factors, cave environmental factors, and water environmental factors. Based on this model, we have established the best construction parameter system for "ecological stream ditches" and "caves." For example, the surface vegetation coverage of the cave area on both sides of the ecological stream ditch should be greater than 85%; the stream ditch should be constructed in an irregular shape, with a gradient of 30° to 45° extending into the stream, a width of 50 to 300 cm, a depth of 50 cm, and a stream bed covered with a 15 to 20 cm thick layer of sand and pebbles composed of river sand and pebbles, a stream water depth of 25 to 30 cm, and a flow rate of 0.05 to 1 m/s; the cave area ratio should be ≥1.5, and other specific parameter requirements.
 

Conception of one action plan with the Regional Directorate of Fisheries and Blue Economy (DRPEB) of Diana

In close collaboration with the Regional Directorate of Fishing and the Blue Economy of Diana, with whom we developed an action plan for the implementation of all the activity, mutually approved and signed.

It is always necessary to establish synergy with the partners concerned in order to be able to implement the planned activities effectively and efficiently.

Institutional strengthening & sustainability

The ACReSAL project collaborates with three key ministries: Environment, Agriculture, and Water Resources. It operates across multiple institutional levels, including state, national, local, and community levels. This approach ensures that project implementers at all ministerial levels have their capacities strengthened, thereby sustaining the project's investments and efficient landscapes management.

  • Effective collaboration across the three Ministries and the Institutions that are implementing the project through regular stakeholder engagements.
  • Technical support from the World Bank, the team provide support across project activities and ensure impactful project implementation.

The synergy between the Ministries and institutions is key to producing results, because for impactful results for the project it is key that all Ministries must work closely together. The synergy has provided more innovative and collaborative ideas for effective project delivery.

Sustainable Agriculture and Landscapes Management

The integration of sustainable agriculture and landscape management practices in land restoration efforts is crucial in conserving soil and water, promoting biodiversity, and mitigating climate change. This approach also improves livelihoods, enhances ecosystem services, and builds resilience. To achieve this, we conducted thorough assessments, engaged local farmers and other stakeholders, developed context-specific plans, provided training, monitored progress, and foster policy support. This ensures a holistic and sustainable restoration of degraded lands, benefiting both people and the environment, including water resources. It's important for the community to collaborate, contribute, and learn effective environmental management approaches to ensure the project's long-term sustainability and unsustainable agricultural practices.

 

  • Prioritizing alternative livelihood options in land restoration.
  • Sensitizing the community to environmental issues and methods to prevent land degradation.
  • Integrating climate smart agriculture in soil restoration.
  • Community Ownership and government support.
  • Emphasizing the importance of community participation to identify their top priority issues.
  • Raising community awareness of all interventions, including gully restoration and reforestation, through comprehensive awareness campaigns.
  • Establishing an interim engagement point, such as collaborating with traditional leaders, to secure community support
Continuous Community Engagement Throughout the Project Period

Some community members had heard of success stories from elsewhere but were pessimistic, considering the unpaying efforts they had already put into restoring the area. Sensitization meetings were conducted regarding the hydrological restoration approach to ensure that the community was adequately included. Through VAJIKI CFA, the community was informed of the upcoming hydrological activity. Through the village heads, 30 communities participated in the hydrological restoration and monitoring training. 

Regular communication with the local community throughout the hydrological restoration project ensured ongoing involvement and support. This engagement helped keep the community informed, addressed their concerns and fostered a sense of ownership over restoration efforts.

  • Providing continuous updates and engaging the community throughout the project ensures sustained involvement and support.
  • Establishing channels for community feedback helps address concerns and improve the effectiveness of restoration activities.
  • Continuous community engagement is essential for maintaining interest and addressing emerging issues throughout the project.
  • Being responsive to community feedback helps build trust and ensure the project's implementation and success.
Research-Led and Ecological Mangrove Restoration

This project was initiated against the backdrop of an existing community forest association (VAJIKI) that had expressed interest in the conservation of mangroves. The community had already been engaging in planting mangroves, but in this specific area, attempts had yet to bear fruit. Although no meaningful salt production took place, salt pans had earlier on been excavated in the area, resulting in the clearing of about 10 ha of mangroves. The site had since remained bare due to the extremely high salinity levels that hindered the recovery of mangroves even upon abandonment of salt production. 

Guiding the restoration efforts based on research and ecological principles ensured that the hydrological interventions were scientifically sound and ecologically appropriate. This approach involved applying research findings to address specific challenges related to water flow, salinity, and mangrove health.

  • Using research and ecological principles to guide restoration efforts ensures that interventions are based on a scientific approach.
  • Applying research findings to the specific conditions of the project area helps in designing effective interventions.
  • Engaging community members in the research process ensured that citizen science and needs were reflected in the restoration strategies.
  • Involving stakeholders in research fostered a sense of shared responsibility and commitment to the restoration goals.
  • Incorporating scientific research into the restoration design enhances the effectiveness and sustainability of the interventions.
  • Adapting techniques based on ongoing research and field observations is crucial for addressing dynamic hydrological conditions.
  • Incorporating local perspectives into the research process enhances the relevance and applicability of the findings.
Collaboration with Partners

During the project, the partners involved were different users of the Vanga mangrove, both directly and indirectly, and all depended on the existence of the forest to accomplish their uses. These include fishermen, beekeepers, dagaa processors, Vanga Blue Forest, researchers, Kenya Marine and Fisheries Research Institute, Kenya Forest Service and WWF-Kenya. This was necessary for successful hydrological restoration. This collaboration ensured that resources were shared, efforts were coordinated, and the restoration process benefited from diverse expertise.

 

  • Working with VAJIKI CFA, Kenya Forest Service, Kenya Marine and Fisheries Research Institute, and other stakeholders facilitates resource sharing and coordinated efforts.
  • Leveraging the knowledge and experience of various partners enhances the planning and execution of the hydrological restoration activities.
  • Citizen science enhances monitoring activities, increases community investment in the restoration project and provides valuable insights into local conditions and changes.
  • Effective collaboration among partners is vital for the success of hydrological restoration projects. Clear roles and open communication improve project outcomes.
  • Sharing resources and expertise among partners enhances the efficiency and impact of restoration efforts.
  • Promoting shared ownership among stakeholders leads to more effective and sustainable restoration outcomes.
Field-Based Training

Field-based training allowed community members to gain practical involvement and experience in the process of hydrological restoration. The community members to be engaged in the activities were identified through the village heads and VAJIKI CFA officials. Meetings were first held with opinion leaders in the village before extrapolating to the larger community. They then went through training, which was mainly field-based. The community was trained on general mangrove restoration and on how to create a (fishbone) network of channels in the degraded site to facilitate free and almost simultaneous flooding of the area. Hydrological restoration was trained in the field, allowing the community to observe and appreciate the baseline conditions and the modifications that could be made.

 

  • Practical demonstrations in the field allow community members to engage directly with the restoration process and understand the techniques used.
  • Training focusing on site-specific conditions ensures that the skills learned directly apply to the restoration.

 

  • Hands-on, site-specific training is more effective than theoretical lessons alone. Engaging with actual conditions enhances understanding and application of restoration techniques.
  • Continuous training and skill development are essential for maintaining progress and ensuring the project's long-term success.
Collaboration and Partnerships for Environmental Education

This building block centers on engaging universities, colleges, and local partners in environmental education and conservation efforts. We collaborate with football clubs and teams on campuses to promote climate change awareness and endangered species conservation. By leveraging these partnerships, we provide communities with the knowledge and tools needed to combat climate change. The collaboration extends to local environmental organizations, which offer technical support to communities. This interconnected approach is vital to the success of our campaign, which mobilizes resources, boosts participation, and amplifies the campaign’s impact through the collective efforts of educational institutions, environmental groups, government agencies, football stars, influencers, and corporate sponsors.

Early involvement of partners is crucial for the success of this building block. By engaging them from the project's inception, partners gain a clear understanding of the objectives and can effectively contribute resources, such as providing staff for football campaigns. This early inclusion fosters a sense of ownership and commitment among partners, enhancing their support and ensuring the project’s goals are met.

One key lesson learned is the critical importance of collaboration in environmental conservation projects. Success depends on involving all community levels—from youth and universities to local partners. Ensuring that these groups feel like true collaborators fosters a sense of ownership and commitment, which is essential for the project’s sustainability.