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A Simple Cultivation Method for Chesapeake Bay Ulva intestinalis for Algal Seed Stock
Author(s) -
Li Ji,
Kangas Patrick,
Terlizzi Daniel E.
Publication year - 2014
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1080/15222055.2013.869287
Subject(s) - biology , chesapeake bay , aquaculture , oyster , algae , propagule , thallus , sargassum , nutrient , zoospore , bay , fishery , botany , estuary , ecology , fish <actinopterygii> , oceanography , spore , geology
Ulva spp. are valuable economically as edible green algae, and they also have environmental value in biofiltration. Cultivation of Ulva spp., in fact macroalgal cultivation generally, is limited in the USA. As part of a larger effort to develop macroalgal cultivation in the Chesapeake Bay for nutrient remediation, we developed a “seeding” method for Chesapeake Bay isolates of U. intestinalis . Ulva intestinalis thalli were induced to produce and release free‐swimming zoospores by desiccation and rehydration. The zoospores then were induced to settle on the nylon nets by dark incubation. Rhizoids from the zoospores formed on the nets, and the nets became covered with green filaments which developed tubular thalli. Nets with thalli can be incubated in indoors or deployed in natural water to generate production‐scale cultivation of U. intestinalis in the Chesapeake Bay. Such cultivation can be integrated with the growing oyster aquaculture industry in the Chesapeake Bay area, U. intestinalis serving as biofilters to remove oyster wastes and increase economic benefit through water quality enhancement and nutrient credits, and as an aquaculture product in their own right.