Mihaila, Alisa A., Lawton, Rebecca J., Glasson, Christopher R.K., and Magnusson, Marie (2024) Moderate temperature and water flow increase growth during the nursery phase of Asparagopsis armata. Algal Research, 78. 103380.

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Abstract

The red seaweed Asparagopsis armata is a target species for commercial cultivation. However, to facilitate nursery production, optimal cultivation methods for the early life stages of this species need to be developed. Therefore, this study examined the interactive effects of temperature (15 °C, 18 °C and 21 °C), irradiance (15 and 30 μmol photons m−2 s−1) and photoperiod (12 h L:12 h D and 8 h L:16 h D), and nutrient concentration (F/8 and F/4) and water flow (0.6 L min −1) on the development and growth of juvenile gametophytes of A. armata across two controlled laboratory experiments. Temperature and water flow had the greatest effect on the length of gametophytes, which was highest at 18 °C and with water flow. Gametophytes developed rapidly and were consistently largest when exposed to a 12 h L:12 h D photoperiod and growth increased when individuals were maintained at 15 μmol photons m−2 s−1 compared to 30 μmol photons m−2 s−1 under a 12 h L:12 h D photoperiod. Nutrients did not limit growth at either concentration, although contamination increased with increasing nutrient concentration and irradiance. Water flow is highly recommended during nursery cultivation of A. armata as this resulted in almost double the overall biomass productivity compared to static treatments. This work identifies critical parameters for enhancing development and growth during the early life stages of A. armata and provides fundamental information to facilitate system-specific upscaling and enable larger scale nursery production.

Item ID:	83337
Item Type:	Article (Research - C1)
ISSN:	2211-9264
Copyright Information:	© 2024 Elsevier B.V. All rights reserved.
Date Deposited:	05 Aug 2024 23:33
FoR Codes:	30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3004 Crop and pasture production > 300499 Crop and pasture production not elsewhere classified @ 30% 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310801 Phycology (incl. marine grasses) @ 30% 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310804 Plant developmental and reproductive biology @ 40%
SEO Codes:	26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2601 Environmentally sustainable plant production > 260199 Environmentally sustainable plant production not elsewhere classified @ 50% 26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2606 Industrial crops > 260699 Industrial crops not elsewhere classified @ 50%
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