Tag Archives: larvae

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Light Pollution and the Effects on Marine Coastal Environments

A bit of a duality was discovered when researchers from the Universities of Exeter and Bangor in the UK studied light pollution around coastal settlements. What they found was that light pollution from human coastal settlements can effect change in the ecological flow of marine coastal environments by both inhibiting and inducing colonization of specific invertebrates. 150429090144_1_900x600Dr Tom Davies from the Environment and Sustainability Institute at the University of Exeter’s Penryn Campus in Cornwall adds: “We know that artificial light at night alters the behavior of many marine animals but this is the first study to show that it can disrupt the development of ecological communities in the marine environment. Further research is urgently needed to assess what level of light can be considered ‘safe’ so that legislation can be put in place to minimize future light pollution from new and existing developments.” Read more here!… More:

Live Rock Hitchhikers: Tunicates (Sea Squirts)

Tunicates can be found in a variety of colorationsAmong the more fascinating creatures that commonly make their way into marine aquariums as stowaways on good-quality live rock are tunicates, or sea squirts. In terms of visual interest, these animals can be quite dazzling, with some exhibiting spectacular coloration or resembling small, delicate, translucent pitchers or urns. What are they? Tunicates are filter-feeding marine organisms with a very simple body plan. Essentially, they’re water-filled sacks with two openings—an incurrent (or oral) siphon and an excurrent (or atrial) siphon. As you’ve probably deduced already, sea water is drawn into the animal through the incurrent siphon, tiny planktonic particles are filtered out, and then the water is expelled through the excurrent siphon. These creatures can be either solitary or colonial and are often mistaken for sponges.

Coral Larvae Remaining Closer to Home

A new study performed by partners of the ARC Center for Excellence Coral Reef Studies (Coral CoE) has found that with increases in ocean temperatures coral larvae are remaining closer to home. “We found that at higher temperatures more coral larvae will tend to stay on their birth reef,” said the lead author of the study Dr Joana Figueiredo from the ARC Centre of Excellence for Coral Reef Studies at James Cook University. With global warming affecting environments far and wide this is “good news in an otherwise cloudy picture for isolated reefs, because in the future they will be able to retain more of their own larvae and recover faster from severe storms or bleaching events,” added Figueiredo.

140429092727-largeWhile it is clear the more larvae that remains near a reef will colonize that reef, it is very apparent that the dispersal of larvae throughout the vast ocean currents is reduced as a result. “The loss of connectivity can make reef systems such as the Great Barrier Reef  more vulnerable, so interconnected reef systems that depend on the recruitment of coral larvae may take more time to recover after a disturbance, such as a cyclone, because fewer larvae will disperse from other reefs to the disturbed reef.” Photo Credit: Andrew H. Baird -Goniastrea aspera is shown releasing egg sperm bundles. Read more here!

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DNA sequencing reveals two Genicanthus species almost raised at the Long Island Aquarium

mystery angel93sm Last summer I reported on reefs.com that I had raised a number of marine angelfish (around a dozen in all) to more than one month of age using only cultured copepods obtained from Algagen. In each case, the late-stage larvae began to show a marked increase in pigmentation and changes in behavior that often coincide with settlement.… More:

Vossen’s larvae catchers put to the test with Lipogramma klayi


It’s been several months since I raised my first Lipogramma klayi at the Long Island Aquarium. Sadly, I’ve only had two more reach settlement since then.  One of the bottlenecks to the mass production of this beautiful deepwater basslet, as well as other grammatids, is that they are what we sometimes refer to as “trickle” spawners because although they spawn often, they lay only a few eggs at a time.… More:

Liopropoma Update

A 69-day-old larva

 It’s been more than two weeks since I posted news of the first settlement of a Liopropoma bass at the Long Island Aquarium.  I know at least a few of you are eager for an update, but there really hasn’t been anything new to report…until now.… More:

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