{"id":69425,"date":"2020-09-17T18:57:14","date_gmt":"2020-09-17T15:57:14","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/100-million-year-old-giant-sperm-discovered-preserved-in-amber\/"},"modified":"2020-09-17T18:57:14","modified_gmt":"2020-09-17T15:57:14","slug":"100-million-year-old-giant-sperm-discovered-preserved-in-amber","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/100-million-year-old-giant-sperm-discovered-preserved-in-amber\/","title":{"rendered":"#100-million-year-old ‘giant sperm’ discovered preserved in amber"},"content":{"rendered":"

“#100-million-year-old ‘giant sperm’ discovered preserved in amber<\/strong>”<\/p>\n

\n Scientists have unearthed the largest and oldest sperm ever recorded \u2014 dating back nearly 100 million years \u2014 from an ancient crustacean encased in amber.<\/p>\n

The Cretaceous period sex cells are not only many times larger than human sperm, but come from a tiny bivalve \u2014 or mollusk \u2014 about the size of a poppy seed, about 0.6 millimeters, according to a study published Wednesday in Proceedings of the Royal Society B<\/a>.<\/p>\n

They belong in a category of \u201cgiant sperm\u201d common among some \u201cmicro-crustaceans\u201d known as ostracods, which today includes the minuscule seed shrimp. Sperm from an ostracod is known for being up to 10 times larger<\/a> than the animal\u2019s own body. As another example, the modern fruit fly also boasts an outsize sperm measuring 2.2 inches, which is about 20 times the bug\u2019s body size.<\/p>\n

Compared to their marine findings, an equivalent ratio for humans would be a 24-foot-long sperm, according to study co-author Renate Matzke-Karasz, a geobiologist at Ludwig-Maximilians-Universit\u00e4t (LMU) in Munich.<\/p>\n

\u201cPreviously, we were not sure if animals that \u2018switched\u2019 to using these giant sperm at a certain point in their history are doomed to become extinct very quickly. But in ostracods, it seemed to work for more than 100 million years,\u201d she told Vice<\/a>.<\/p>\n

Researchers called the results \u201ca paramount example of evolutionary stasis\u201d in their report.<\/p>\n

It\u2019s the swimmers\u2019 lengthy tail that makes this possible, wrapp<\/a>ing around themselves to form a sort of reproductive tumbleweed that can swiftly barrel through the female reproductive canal.<\/p>\n

The researchers examined the specimen, which was found in Myanmar, using a microscopic computerized tomography (CT) scanner to analyze the amber \u2014 which, as it turns out, was packed with 39 different species of the minute shellfish. Their study sheds light on the characteristics of ancient ostracods still present today, including giant sperm and \u201cclasper\u201d appendages. They were also able to observe the ovum as well as ejaculate-filled \u201creceptacles\u201d among the females.<\/p>\n

\"fossilized
Diagram of fossilized sperm and ostracods.<\/span>He Wang et al.<\/span><\/figcaption><\/figure>\n

Biologists confess they aren\u2019t able to precisely measure the male cells but estimate they are at least 0.2 millimeters long \u2014 about the width of two strands of hair \u2014 and about a third of the size of the primordial plankton.<\/p>\n

The fact that ostracod sperm are comparatively large comes at an evolutionary cost. In some modern species, their reproductive system can take up a third of their entire body.<\/p>\n

\u201cThis is a lot of biological energy that must be allocated to reproduction,\u201d said Matzke-Karasz, \u201cso you might think that this doesn\u2019t make sense from an evolutionary standpoint.\u201d<\/p>\n

But for these sex machines, she said, \u201cThere must be an advantage. Otherwise, it wouldn\u2019t exist anymore.\u201d<\/p>\n

\"\"
He Wang et al.<\/span><\/figcaption><\/figure>\n<\/div>\n
\n

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Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

“#100-million-year-old ‘giant sperm’ discovered preserved in amber” Scientists have unearthed the largest and oldest sperm ever recorded \u2014 dating back nearly 100 million years \u2014 from an ancient crustacean encased in amber. The Cretaceous period sex cells are not only many times larger than human sperm, but come from a tiny bivalve \u2014 or mollusk…<\/p>\n","protected":false},"author":1,"featured_media":69426,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/nypost.com\/wp-content\/uploads\/sites\/2\/2020\/09\/fossil-sperm-93-1.jpg?quality=90&strip=all&w=1200","fifu_image_alt":"","footnotes":""},"categories":[1],"tags":[70716,70781,70782,70424,70873,23262],"class_list":["post-69425","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-9-17-20","tag-biology","tag-marine-life","tag-myanmar","tag-reproduction","tag-sex"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/69425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=69425"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/69425\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/69426"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=69425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=69425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=69425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}