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By admin - Posted Feb 14, 2011 10:00 PM
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LATEST ARTICLES
ARTICLE

Feature Article: Experimental aquaculture of Dendronephthya corals

By Tim Wijgerde, Ph.D. on Jul 22, 2015 at 09:00 AM

Back in 2005 I first read about Dendronephthya corals, notorious for being difficult to maintain in aquaria. Lacking zooxanthellae, these corals require plankton to stay healthy. In the following years, I read up on the scientific literature, and toyed with the idea of setting up an aquarium specifically designed for Dendronephthya. This led to the launch of a crowd funding project on Indiegogo, to acquire funds for the development of a culture protocol for Dendronephthya corals. Although insufficient funds were gathered to fully develop an aquaculture system and culture protocol, two preliminary experiments were conducted. In this article, I will present the results of these experiments, and provide future directions for research. This may help aquarists to keep pushing the frontier of coral husbandry and aquaculture.

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ARTICLE

Coral Nutrition Part 4: Can Nutrient Deficiency Related to Water Motion Induce Coral Bleaching?

By Dana Riddle on Jun 17, 2015 at 10:00 AM

Science and emotion: Ne'er the two should meet. But they do, and this article will relay my small experience with these two. After writing a book on captive corals and over 300 articles on the same, it takes a lot to get me excited.

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The Reef Aquarium of Jonas Roman

By Jonas Roman on Jun 03, 2015 at 08:00 AM

Swedish aquarist Jonas Roman has established a marvelously successful 650 liter (170 gallon) SPS-dominated, heavily stocked reef primarily using natural filtration methods.

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Decreased growth of Stylophora pistillata with nutrient-driven elevated zooxanthellae density is largely explained by DIC limitation

By Alwin Hylkema (ab*), Tim Wijgerde (a*), Ronald Osinga on May 13, 2015 at 10:00 AM

High nutrient concentrations are generally known to adversely affect coral calcification. This reduction in calcification rate is often associated with increased zooxanthellae densities, but little is known about the mechanism underlying calcification inhibition. In this study, we assessed the limiting effects of dissolved inorganic carbon (DIC) on growth rates of Stylophora pistillata before and after five weeks of nitrogen and phosphorus enrichment. Nutrient enrichment resulted in a significant increase in zooxanthellae density and inhibition of calcification, measured using the alkalinity anomaly technique. DIC limitation was the main causative factor for this inhibition; a doubling of the bicarbonate concentration not only restored but greatly enhanced calcification rates of colonies with elevated zooxanthellae densities. At high bicarbonate concentration, no significant negative effect of nutrient enrichment on coral growth was found. The causal mechanism behind calcification inhibition due to nutrient enrichment is most likely increased competition for dissolved inorganic carbon, either among the zooxanthellae or between the coral host and its symbiotic dinoflagellates. This highly limiting effect of DIC on coral growth at elevated nutrient concentrations has important implications for coral aquaculture and husbandry.

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ARTICLE

Coral Nutrition, Part Three: Amino Acids and Comments on Amino Acid Supplements

By Dana Riddle on May 06, 2015 at 09:00 AM

Dana Riddle continues his intensive exploration of coral nutrition. In part three of his series, he delves deep into the subject of amino acids, including a discussion about amino acid supplements marketed to reefkeepers.

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Effects of Different Spectra Generated by LEDs on Growth of the Stony Coral Porites lobata

By Dana Riddle on Apr 15, 2015 at 09:00 AM

Stony coral nubbins (tentatively identified as Porites lobata; see Figure 1) were exposed to light of the same intensity (128 µmolm²sec) but different spectra for 75 days. Growth rates were determined by weighing the fragments periodically with an analytical balance.

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ARTICLE

On the Giant Clams Tridacna mbalavuana and T. squamosina

By James W. Fatherree on Mar 25, 2015 at 09:00 AM

Reefkeepers all know the giant clams Tridacna crocea, T. maxima, T. squamosa, T. deresa, and T. gigas. James W. Fatherree introduces two recently described species of tridacnids, one of which is now making its way into the hobby.

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Coral Reproduction: Biology, Challenges and Future Perspectives

By Tim Wijgerde, Ph.D. on Mar 11, 2015 at 08:00 AM

Over the last decades, the husbandry of aquarium corals has risen to a high level. Although captive corals currently exhibit high survival and fast growth, sexual reproduction remains a major hurdle. Closing the life cycle of corals is an important next step in coral husbandry and aquaculture. Below, I will discuss the reproductive biology of scleractinian corals, the challenges associated with sexual reproduction, and future perspectives of coral aquaculture.

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ARTICLE

Feature Aquarium: The 335 gallon "Tall Reef" of Brad Syphus

Brad's reef aquarium is maturing beautifully, but the road to success was long and difficult. Brad's story is one of perseverance and the good people who supported him through his journey.

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ARTICLE

Coral Nutrition, Part Two: Foods for Corals

By Dana Riddle on Feb 04, 2015 at 09:00 AM

While once reefkeepers believed lighting and chemical additives were all we needed to sustain corals, coral nutrition is now recognized as vital for a thriving captive reef. Dana Riddle delves into more detail about foods for coral.

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ARTICLE

Product Review: Maxspect's Gyre System

By Dana Riddle on Jan 07, 2015 at 09:00 AM

Dana Riddle thoroughly reviews one of the most anticipated and innovative water circulation devices to enter our hobby in some time. How does the Maxspect Gyre XF150 measure up?

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ARTICLE

Aquarium Renovation Project at Toledo Zoo

By Jay Hemdal on Dec 10, 2014 at 09:00 AM

Jay Hemdal, Toledo Zoo’s Curator of Fishes and Invertebrates, grants us an inside look at their grand renovation project of the historic public aquarium. The new Toledo Zoo Aquarium will open on March 27, 2015.

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ARTICLE

Black Corals

By Marzia Bo, Ph.D., Tim Wijgerde, Ph.D. on Nov 19, 2014 at 09:00 AM

Black corals, formally known as Antipatharia, are members of a unique order within the Anthozoa class. These hexacorals are regularly found in the aquarium trade, and are often misidentified as gorgonians. In this article, we discuss the biology of black corals, and offer some suggestions for aquarium husbandry.

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ARTICLE

Coral Nutrition: An Introduction, Care and Feeding of Zooxanthellae

By Dana Riddle on Nov 12, 2014 at 09:00 AM

All reefkeepers know about the live-sustaining relationship between coral and their symbiotic algae. However, few of us understand how to care and feed zooxanthallae. Dana Riddle examines this topic in depth.

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ARTICLE

Proposed listing of the Percula clownfish (Amphiprion percula) under the U.S. Endangered Species Act: What it means, and what aquarists need to know (Part 2)

By Chris Jury on Oct 22, 2014 at 09:00 AM

Chris Jury concludes his two part article by exploring each of the threat factors (including additional data as well as NMFS' response) presented in the petition to list Percula clownfish under the ESA.

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