{"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://reefs.com/#organization","name":"","url":"https://reefs.com/","sameAs":["https://www.facebook.com/reefscom","https://www.linkedin.com/company/reefs-com","http://www.youtube.com/c/Reefscom","https://www.pinterest.com/reefscom/","https://twitter.com/reefscom"]},{"@type":"WebSite","@id":"https://reefs.com/#website","url":"https://reefs.com/","name":"Reefs.com","publisher":{"@id":"https://reefs.com/#organization"},"potentialAction":{"@type":"SearchAction","target":"https://reefs.com/?s={search_term_string}","query-input":"required name=search_term_string"}},{"@type":"WebPage","@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#webpage","url":"https://reefs.com/2014/05/22/colurella-adriatica-update/","inLanguage":"en-US","name":"Colurella adriatica update - Reefs.com","isPartOf":{"@id":"https://reefs.com/#website"},"image":{"@type":"ImageObject","@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#primaryimage","url":"https://cdn.reefs.com/blog/wp-content/uploads/2014/05/febarisingtide.png","width":200,"height":200},"primaryImageOfPage":{"@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#primaryimage"},"datePublished":"2014-05-22T22:19:52+00:00","dateModified":"2014-05-22T22:19:52+00:00","description":"Colurella adriatica update - Figure.\u00a0 Photos of Colurella adriatica;a potential new live feed for bothmarine and freshwater fish larvae.This post is in response to requests for more information about Colurella adriatica.\u00a0 As previously stated, we\u2019ve examined salinity and found that although they tolerate a wide range, optimal performance is at 15-20 g/L (ppt).\u00a0 For feeding marine fish larvae this is likely going to be the culture salinity as acute acclimation to full strength seawater is good and this will save on salt.\u00a0 Colurella also grows well at 5 g/L and therefore when growing them for freshwater fish, this is the recommended salinity.\u00a0 Thus far, attempts to grow Colurella in 0 g/L freshwater have yielded poor results.\u00a0 The only other culture parameter tested so far has been diet.\u00a0 An industry partner works as a microbiologist and isolates bacteria.\u00a0 He had some freeze-dried bacteria that he wanted us to test.\u00a0 When solely fed freeze-dried bacteria the Colurella populations survived.\u00a0 When compared to those Colurella fed algae paste (Nanno 3600\u2122; Reed Mariculture), the ones fed freeze-dried bacteria initially grew better than those fed paste.\u00a0 However, after 4 days the Colurella fed paste had significantly greater growth.\u00a0 The results of this trial are still being evaluated, as is optimal diet, but Colurella\u2019s ability to be fed, and survive on, freeze-dried bacteria seems feasible.\u00a0 Other culture parameters haven\u2019t been tested yet, but we keep our populations at\u00a0~78\u00b0 F with gentle aeration and\u00a0can reach ~500 rotifers per mL with a population growth rate half of what is achieved with Brachionus sp. rotifers.\u00a0 Hopefully, once we know more about this species we can increase the population density and growth rate. As stated in a previous post, Colurella has been fed to and consumed by a number of marine fish larvae.\u00a0 In fact, it is easier to mention the one that has not consumed it: green chromis.\u00a0 Digestibility has been an issue for us when using Colurella as prey for marine fish larvae.\u00a0 We've actually seen live, undigested Colurella being passed through the gut of marine fish larvae.\u00a0 After talking with Patrick Sorgeloos, his suggestion was to feed less and increase the residence time in the gut.\u00a0 We'd always fed high densities.\u00a0 One of the unique attributes of Pacific blue tang larvae is their ability to survive heavy water movement (usually in the form of aeration), even to the point of being unable to feed (more on this in a future post).\u00a0 One of the tests we\u2019ve run to increase digestion was to feed them Colurella followed by periods of heavy aeration so they couldn\u2019t feed.\u00a0 What we found were digested Colurella in the gut of Pacific blue tang larvae.\u00a0 The results were encouraging and recent tests have focused on ways to increase residence time of Colurella in the gut of marine fish larvae.\u00a0 Digestibility of Colurella is not a problem for freshwater fish larvae.\u00a0 To date, we've fed them to bala shark, dwarf gourami, lemon tetra, and red-eye tetra larvae and they've all survived.\u00a0 Recently a population of Colurella was supplied to a freshwater fish farmer in the hopes of more advantageous results during larval rearing.\u00a0 Perhaps the most exciting information is that in the next few weeks we\u2019ll be awarded a grant to look at the culture conditions and larval feeding of Colurella (and Oithona colcarva; our marine cyclopoid copepod).\u00a0 Whether this will be in the form of hiring someone or promoting someone at our facility remains to be seen, but having someone focused solely on answering these questions will help us obtain valid information quickly.\u00a0\u00a0 The Rising Tide team at the Tropical Aquaculture Laboratory"},{"@type":"Article","@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#article","isPartOf":{"@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#webpage"},"author":{"@id":"https://reefs.com/author/Rising-Tide/#author","name":"Rising Tide"},"publisher":{"@id":"https://reefs.com/#organization"},"headline":"Colurella adriatica update","datePublished":"2014-05-22T22:19:52+00:00","dateModified":"2014-05-22T22:19:52+00:00","commentCount":0,"mainEntityOfPage":"https://reefs.com/2014/05/22/colurella-adriatica-update/#webpage","image":{"@id":"https://reefs.com/2014/05/22/colurella-adriatica-update/#primaryimage"},"keywords":"conservation,fish,industry","articleSection":"Conservation,Fish,Industry,Science"},{"@type":"Person","@id":"https://reefs.com/author/Rising-Tide/#author","name":"Rising Tide","image":{"@type":"ImageObject","@id":"https://reefs.com/#personlogo","url":"https://cdn.reefs.com/blog/wp-content/uploads/2014/02/febarisingtide.png","caption":"Rising Tide"},"sameAs":[]}]}

Colurella adriatica update

Rising TideBy Rising Tide 5 years ago
Home  /  Conservation  /  Colurella adriatica update

This post is in response to requests for more information about Colurella adriatica.  As previously stated, we’ve examined salinity and found that although they tolerate a wide range, optimal performance is at 15-20 g/L (ppt).  For feeding marine fish larvae this is likely going to be the culture salinity as acute acclimation to full strength seawater is good and this will save on salt.  Colurella also grows well at 5 g/L and therefore when growing them for freshwater fish, this is the recommended salinity.  Thus far, attempts to grow Colurella in 0 g/L freshwater have yielded poor results.  The only other culture parameter tested so far has been diet.  An industry partner works as a microbiologist and isolates bacteria.  He had some freeze-dried bacteria that he wanted us to test.  When solely fed freeze-dried bacteria the Colurella populations survived.  When compared to those Colurella fed algae paste (Nanno 3600™; Reed Mariculture), the ones fed freeze-dried bacteria initially grew better than those fed paste.  However, after 4 days the Colurella fed paste had significantly greater growth.  The results of this trial are still being evaluated, as is optimal diet, but Colurella’s ability to be fed, and survive on, freeze-dried bacteria seems feasible.  Other culture parameters haven’t been tested yet, but we keep our populations at ~78° F with gentle aeration and can reach ~500 rotifers per mL with a population growth rate half of what is achieved with Brachionus sp. rotifers.  Hopefully, once we know more about this species we can increase the population density and growth rate. As stated in a previous post, Colurella has been fed to MORE:Colurella adriatica update

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