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Showing 1 to 12 of 12 for “"Tripneustes gratilla"”.
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Consideration of the Hawaiian Collector Urchin, Tripneustes gratilla, as a Biocontrol Agent
… preferences of hatchery-raised juvenile urchins, Tripneustes gratilla, to evaluate the efficacy of their use as biocontrol agents in the efforts to reduce alien invasive algae. In flow-through tanks, we measured urchin growth rates, feeding rates and feeding preferences among diets of the most …
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Chemosensory properties of different Ulva extracts and their effects on Tripneustes gratilla
… preferences of the tropical sea urchin Tripneustes gratilla for four crude extracts of Ulva as well as Fresh Ulva and an artificial feed. The four crude extracts of Ulva (Methanolic, Ethanolic, Chloroform and Chloroform-Methanol extracts) were tested by pair-wise chemosensory trials in a …
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Development of an embryo-larval chronic toxicity test using the sea urchins Tripneustes gratilla and Echinometra mathaei
… of the sea urchins Echinometra mathaei and Tripneustes gratilla are used for acute toxicity testing purposes in South Africa through the fertilisation test (e.g. for testing effluents and seawater samples). However, this test has raised questions on the longer-term, sub-lethal effects of …
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The feasibility of a commercial-scale recirculating aquaculture system integrating sea urchins (Tripneustes gratilla) and seaweed (Ulva)
… been proposed that the highly valued sea urchin, Tripneustes gratilla, and the green macroalga, Ulva, could be suitable co-candidates for a land-based recirculating Integrated MultiTrophic Aquaculture (IMTA) system. This IMTA system is suggested to be sustainable and efficient, primarily because …
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Feeding preferences of Tripneustes gratilla Linnaeus Echinodermata Echinodea and the prospect for sea urchin aquaculture in South Africa
… Africa. Feeding preferences of the sea urchin Tripneustes gratilla were tested by two different methods; a touch-preference test and a 48-hour consumption test. A touchpreference is established when the sea urchins' lantern teeth touched an algal species. The 48-hour consumption test was …
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Determining larval settlement, post-settlement and weaning substrates and regimes for the sea urchin Tripneustes gratilla in intensive aquaculture
… were investigated in the collector urchin, Tripneustes gratilla. Two cohorts of urchins were spawned for two separate growth trials. Growth trials assessed settlement, post-settlement growth, and the timing of weaning onto macroalgae (Ulva lacinulata). Experimental substrates tested include: …
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Growth And Calcification Response Of The Common Collector Urchin, Tripneustes Gratilla, To Projected Climate Change: Effects Of Warming And Acidification
… the common collector urchin native to Hawaiʻi, Tripneustes gratilla. In this experiment, individual T. gratilla from juvenile (~16 mm) to adult (~60 mm) were grown under projected environmental conditions of warming (+2C) and increased acidity (-0.3 pH units) and a combination of both. The …
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Attractant properties of chemical constituents of the green macroalga Ulva and their response effects on the commercially important sea urchin Tripneustes gratilla
… is important. In South Africa, the sea urchin Tripneustes gratilla has been selected for aquaculture due to its fast growth and high quality roe. Although it is a generalist herbivore, various studies have shown that T. gratilla has a significant preference for the macroalgae Ulva. The purpose …
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Keanekaragaman jenis echinodermata di Pantai Kondang Merak Kecamatan Donomulyo Kabupaten Malang
… viridis, Echinometra sp, Echinothrix calamaris, Tripneustes gratilla, Ophiarachna affinis. Keanekaragaman jenis Echinodermata di Pantai Kondang Merak secara kumulatif adalah sebesar 2,003, yang berarti keanekaragaman Echinodermata sedang. Sedangkan nilai dominansi kumulatif sebesar 0,14 yang …
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The use of ULVA as a feed supplement in the development of an artificial diet and feeding regimes to produce export quality roe from the sea urchin Tripneustes gratilla (Linnaeus)
Tripneustes gratilla is a fast growing, shallow water echinoid, which occurs across the Indo-Pacific, with its south-western limit in warm, temperate waters of South Africa. The success of T. gratilla cultivation depends, in part, on the development of a high quality, costeffective, …
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Climate change impacts on macro and micro scale interactions between a tropical herbivore and temperate kelp forests
… tropical herbivore, the sea urchin Tripneustes gratilla. Secondly, I used a bio-physical model to investigate climate-driven changes in dispersal of T. gratilla, to determine potential impacts on the urchin’s biogeographical range and on its interactions with kelp. I discovered that …
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Feed attractants in aquaculture - the chemical composition of aquacultured Ulva lacinulata (Chlorophyta)
… macroalgivores, including the local sea urchin Tripneustes gratilla (Camarodonta). Under laboratory conditions, T. gratilla has demonstrated hierarchical feeding preference to this aquacultured Ulva over other seaweed species. Inclusion of this alga in the diet of this urchin has been shown to …