Guam mantas will be forever mentioned in the scientific literature because of UOG Master of Biology candidate Julie Hartup\u2019s passion for her research subject. She has been studying Guam\u2019s Manta alfredi for eight years and is the first to document a very interesting behavior, mantas eating fish spawn.<\/p>\n
Several of Hartup\u2019s paddler and free diving friends told her about seeing mantas congregating purposefully in an area where surgeonfish were spawning. Since they were able to give her an exact date, Julie was able to calculate the moon phase, which is important as many fish synchronize their spawning with the moon. Using this information she predicted when the spawning event would occur that upcoming year and was there to witness a shoal of spawning surgeonfish accompanied by a fever of mantas.<\/p>\n
Hartup\u2019s research findings not only highlight important information about mantas, but also reveal predictable spawning aggregations (SPAGs) for three important reef dwellers: Acanthurus triostegus, Acanthurus gutattus, Acanthurus lineatus. These surgeonfish react to the presence of mantas by trying to evade them.<\/p>\n
As is often the case with basic research, many more questions evolve out of finding a few answers.<\/p>\n
\u201cThe mantas come in patterns. Are they herding the spawning fish? Is there cooperative behavior? How do the mantas know to come? Mantas are thought to be singular except for feeding or visiting cleaning station. Are they really singular or more social than we know? These are some of the questions I really want to investigate,\u201d said Hartup.<\/p>\n
What science does know about mantas is that they live 40 to 50 years and are late to mature. They usually have only one pup every two to five years, which takes 13 months to develop and comes out rolled up like a burrito. There is no parental care, so the pups navigate life without motherly guidance. No one knows where mantas have their young.<\/p>\n
\u201cI believe mantas must have a remarkable sensory system. Their cerebellum and frontal lobes are quite large so they are naturally curious and will check out humans in their vicinity,\u201d explained Hartup. Through direct observation, photographs, and videos she has documented 41 individuals in Guam, but there is a massive lack of information about the lives of mantas in Micronesia.<\/p>\n
In 2008 the Yap state government passed Law No. 7-36 which designates \u201c\u2026all the internal and territorial waters of the State of Yap are hereby established as an official sanctuary for manta rays.\u201d<\/p>\n
Hartup\u2019s research has been tapped by the Yap government to develop an effective management plan for the protection of the mantas in Yap. She has been collecting data on Yap\u2019s mantas for several years. \u201cBy understanding the lives of Micronesia\u2019s mantas, we\u2019ll know where to start protecting them.\u201d<\/p>\n
Hartup wants to document them before they are lost to the threats of human encroachment or habitat degradation.<\/p>\n
About Hartup<\/strong><\/p>\n Julie Hartup is the Mariana Islands Program Leader for the Manta Trust, a not-for-profit organization dedicated to research and conservation of mantas and their ocean home. She is making a difference in the region one manta at a time.<\/p>\n Please visit www.mantatrust.org for more information about manta research around the globe.\u00a0(UOG)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Guam mantas will be forever mentioned in the scientific literature because of UOG Master of…<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[51,21],"class_list":["post-28226","post","type-post","status-publish","format-standard","hentry","category-local-news","tag-guam","tag-life"],"_links":{"self":[{"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/posts\/28226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/comments?post=28226"}],"version-history":[{"count":0,"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/posts\/28226\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/media?parent=28226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/categories?post=28226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.saipantribune.com\/index.php\/wp-json\/wp\/v2\/tags?post=28226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}