Abstract
Farming of Sargassum to produce harvestable crop can be a challenging task to seaweed farmers.•Sexually-produced Sargassum seedlings can be propagated in a hatchery using 140-liter plastic tanks connected with PVC pipes and seawater supply directly pumped from the sea, passing through a filter system.•First step of this method is to collect large amount of fertilized eggs from special branches called receptacles, found at the ends of lateral branches of Sargassum, excised from fertile thalli during its spawning season and collecting their eggs for recruitment into artificial substrate tanks.•Egg collection involves force-releasing the fertilized eggs by vigorous shaking of a small vessel where 100-200 egg-bearing receptacles excised from fertile plants are contained. Each tank can produce up to 2000–3000 seedlings that can supply at least a hectare of farm. Scaling up the production to several hectares of farm is done by simply increasing the number of recruitment tanks and the number of recruitment panels in the hatchery system.
Highlights
The brown seaweed Sargassum, which is abundant in the Philippines, is a source of livelihood for coastal communities
The hatchery system which at the same time serves as a nursery for the young recruits of Sargassum is composed of a filtration tank connected to a series of recruitment tanks made of plastic utility boxes (72 × 52 × 44 cm) supplied with filtered seawater that is sufficiently aerated and recirculated daily using a submersible water pump
The recruitment tanks which are made of plastic utility boxes can hold up to a maximum of 140 liters of seawater supplied from the adjacent sea
Summary
Method for the mass production of seedlings of the tropical brown seaweed Sargassum (Phaeophyceae, Ochrophyta). Method name: Hatchery to produce seedlings of Sargassum from fertilized eggs Keywords: Sargassum hatchery, Flow-through system, Zygote recruitment, Artificial substrate, Clay or limestone substrates, Seeding string Article history: Received 4 December 2019; Accepted 3 March 2020; Available online 9 March 2020. Subject Area: More specific subject area: Method name: Name and reference of original method: Resource availability: Agricultural and Biological Sciences Sargassum seedling production Hatchery to produce seedlings of Sargassum from fertilized eggs Invention disclosed to University of San Carlos and corresponding Patent filed at the Bureau of Patents, Intellectual Property of the Philippines bearing Invention Patent Application No 12019050053 (Filing date: March 26, 2019) N/A
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