Got Nature? Blog

This new publication Fish Muscle Hydrolysate introduces a novel method for producing high-quality protein for larval fish diets, targeting feed and ingredient manufacturers. It outlines the challenges of indoor fish rearing using recirculating aquaculture systems (RAS), particularly the difficulty larvae have digesting traditional dry feeds. The proposed solution uses protein hydrolysates—pre-digested proteins made more accessible through hydrolysis with species-specific digestive enzymes. This approach improves nutrient absorption and growth performance. Notably, the method uses invasive fish species as a sustainable protein source and applies enzymes from the target species for precise, efficient hydrolysis.

This fact sheet is intended for feed ingredient and feed manufacturers interested in producing a species-specific protein source for starter feeds. The early growth and survival of many fish species depend on several factors, including food availability, ingredient digestibility, and environmental conditions.

To receive the free download, visit the Purdue Extension’s resource center: The Education Store – Fish Muscle Hydrolysate.

Resources:
Profitability of Hybrid Striped Bass Cage Aquaculture in the Midwest, The Education Store, Purdue Extension resource center
A Guide to Marketing for Small-Scale Aquaculture Producers, The Education Store
A Guide to Small-Scale Fish Processing Using Local Kitchen Facilities, The Education Store
Marine Shrimp Biofloc Systems: Basic Management Practices, The Education Store
Handbook on Processing Fish for Small-Scale Fish Farmers, The Education Store
Aquaculture Industry in Indiana Growing, Purdue Today
Tilapia Farmed Fish Fact Sheet, The Education Store
Rainbow Trout Farmed Fish Fact Sheet, The Education Store
Pacific White Shrimp Farmed Fish Fact Sheet, The Education Store
Walleye Farmed Fish Fact Sheet: A Guide for Seafood Consumers, The Education Store
Sustainable Aquaculture: What does it mean to you?, The Education Store
The Benefits of Seafood Consumption The Education Store
Walleye Farmed Fish Fact Sheet: A Guide for Seafood Consumers, The Education Store
Pond and Wildlife Management website, Purdue Extension
Fish Cleaning with Purdue Extension County Extension Director, Got Nature? Blog, Purdue Extension – Forestry and Natural Resources
Aquaponics: What to consider before starting your business, YouTube, Purdue Ag Economics
Aquatics & Fisheries, Playlist, YouTube, Purdue Extension – Forestry and Natural Resources
Eat Midwest Fish, Illinois-Indiana Sea Grant online resource hub

Amy Shambach, Aquaculture Marketing Outreach Associate
Purdue Department of Forestry and Natural Resources/Illinois Indiana Sea Grant Program