{"id":10919,"date":"2015-05-01T21:09:49","date_gmt":"2015-05-01T21:09:49","guid":{"rendered":"https:\/\/whsrn.org\/?p=10919"},"modified":"2019-11-27T20:36:21","modified_gmt":"2019-11-27T20:36:21","slug":"7-things-you-didnt-know-about-horseshoe-crabs","status":"publish","type":"post","link":"https:\/\/whsrn.org\/es\/7-things-you-didnt-know-about-horseshoe-crabs\/","title":{"rendered":"7 Things You Didn’t Know about Horseshoe Crabs"},"content":{"rendered":"[vc_row css=”.vc_custom_1537359740219{margin-top: 0px !important;padding-top: 0px !important;}”][vc_column css=”.vc_custom_1537371217000{margin-top: 0px !important;padding-top: 0px !important;}”][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594737445{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;}”]\n

How well do you know this crab that shares the Delaware Bay with us?\u00a0 Here\u2019s a refresher as you prepare for your visit on the bay.<\/h2>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594887688{margin-bottom: 0px !important;}”]\n

1. The horseshoe crab is not a crab.<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594912746{margin-bottom: 0px !important;}”]\n
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Horseshoe crabs are arthropods, but are not in the crustacean class like crabs. Instead, they are in their own class called Merostomata<\/em> and are actually more closely related to spiders and scorpions. No need to worry though; horseshoe crabs cannot bite or sting.<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594945092{margin-bottom: 0px !important;}”]\n

2. Horseshoe crabs are a sought after menu item for some species.<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594954125{margin-bottom: 0px !important;}”]\n
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Juvenile and adult horseshoe crabs do have predators.\u00a0 This list includes gulls, loggerhead sea turtles, alligators, sharks, and even people. In fact, horseshoe crab is considered a delicacy in certain parts of Asia.<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][mk_page_section min_height=”1″ padding_bottom=”0″ sidebar=”sidebar-1″][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][mk_image src=”https:\/\/whsrn.org\/wp-content\/uploads\/2015\/05\/pickering-beach-c-laura-chamberlin.jpg” image_width=”500″ image_height=”600″ align=”center”][mk_fancy_title tag_name=”span” color=”#53565a” size=”12″ font_weight=”bold” margin_bottom=”0″ font_family=”none” align=”center”]\n

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Peak spawning is a sight to see. Remember to visit on a high tide. Photo: Laura Chamberlin.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n[\/mk_fancy_title][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/mk_page_section][vc_row][vc_column][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595074617{margin-bottom: 0px !important;}”]\n

3. Reproduction is difficult and dangerous work.<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595083026{margin-bottom: 0px !important;}”]\n
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Females will lay as many as 80,000 to 100,000 eggs during one breeding season. The female has to come up to shore, usually with more than one eager male attached, and then has to dig a 6 inch hole and deposit 4,000 to 5,000 eggs at once!\u00a0 She then drags the males over the hole so they can fertilize the tiny eggs. She will do this up to five times during one spawning event! The whole act is exhausting and sometimes the waves turn breeding crabs over. At times they aren\u2019t able to turn over again and will perish this way. It\u2019s estimated that 10% of breeding horseshoe crabs will die like this each season. Yikes!<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595101708{margin-bottom: 0px !important;}”]\n

4. Horseshoe crab life is hard!<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595119467{margin-bottom: 0px !important;}”]\n
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Females lay tens of thousands of eggs in one season for a reason.\u00a0 Out of every 10,000 eggs, only six will hatch. Things don\u2019t get any easier at this point \u2013 for every one hundred thousand larvae swimming along the mudflats, only three will survive their first year. The lucky ones can live as long as 20 years.<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][mk_page_section min_height=”1″ padding_bottom=”0″ sidebar=”sidebar-1″][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][mk_image src=”https:\/\/whsrn.org\/wp-content\/uploads\/2015\/05\/img_0209.jpg” image_width=”500″ image_height=”500″ align=”center”][mk_fancy_title tag_name=”span” color=”#53565a” size=”12″ font_weight=”bold” margin_bottom=”0″ font_family=”none” align=”center”]\n

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Sometimes the eggs can be found in clusters, a bonanza for widllife. Photo: Laura Chamberlin.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n[\/mk_fancy_title][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/mk_page_section][vc_row][vc_column][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595259171{margin-bottom: 0px !important;}”]\n

5. Horseshoe crabs have some buff bods!<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595272566{margin-bottom: 0px !important;}”]\n
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Horseshoe crabs have over 750 individual muscles that make up their bodies; humans only have around 650. Do you think horseshoe crabs go around saying \u201cI\u2019m gonna pump, YOU UP\u201d when they see us humans?<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595298051{margin-bottom: 0px !important;}”]\n

6. Female horseshoe crabs are full-bodied, stunning girls that outweigh the puny males.<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595306056{margin-bottom: 0px !important;}”]\n
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Female horseshoe crabs are BIG – sometimes twice as large as the many suitors that will be swarming around her during spawning. Males differ in other ways too.\u00a0 Males have a modified first set of appendages that look like boxing gloves and they have a concave shape to their shells that allows them to rest on the female more easily during spawning.<\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][mk_page_section min_height=”1″ padding_bottom=”0″ sidebar=”sidebar-1″][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][mk_image src=”https:\/\/whsrn.org\/wp-content\/uploads\/2015\/05\/tagging2reduced.jpg” image_size=”full”][mk_fancy_title tag_name=”span” color=”#53565a” size=”12″ font_weight=”bold” margin_bottom=”0″ font_family=”none” align=”center”]\n

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Tagged female with a tagged male attached. Photo: Laura Chamberlin.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n[\/mk_fancy_title][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/mk_page_section][vc_row][vc_column][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566595382160{margin-bottom: 0px !important;}”]\n

7. And finally, these little guys are BIG heroes!<\/h4>\n[\/vc_column_text][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566852901080{margin-bottom: 0px !important;}”]\n
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The horseshoe crab should be revered for its contribution to human health.<\/p>\n

Not only has the horseshoe crab allowed medical researchers to gain a better understanding of human vision (which was so groundbreaking, it led to a Nobel Prize in the 1930\u2019s), but they have directly impacted most everybody that is alive today. Horseshoe crab blood cells, called amoebocytes, have the ability to find and form clots around bacteria that would otherwise cause infection in the horseshoe crab. A solution called Limulus amoebocyte lysate (LAL) is produced from the blood cells of the horseshoe crab. LAL is very sensitive to bacteria and is used to test the sterility of all injectable drugs, vaccines, and implantable devices we use in human and animal medicine. There is no substitute for LAL to date and crabs must be bled to obtain this magnificent bacteria detector. Many of the horseshoe crabs survive 1\/3 of their blood being drained, but 10-15% do not and will die as a result of the process.<\/p>\n

In addition to all of this, we use chitin from their shells for surgical sutures and wound dressings for burn patients.\u00a0 We really do owe great thanks to the horseshoe crab!*<\/strong><\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566852944886{margin-bottom: 0px !important;}”]\n

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Want to learn more about these incredible creatures? Visit horseshoecrab.org<\/a>\u00a0 or pick up a copy of <\/em>Horseshoe Crab – Biography of a Survivor by Anthony D. Fredericks.<\/em><\/p>\n

For an update on synthetic LAL see this recent post: Saving Horseshoe Crabs…one company at a time<\/a><\/em><\/p>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][mk_fancy_title tag_name=”span” color=”#3d4045″ size=”12″ font_weight=”400″ font_family=”none”]Post by: Adriana Manchen, Delaware Bay Program Assistant<\/b>[\/mk_fancy_title][mk_fancy_title tag_name=”span” color=”#3d4045″ size=”12″ font_weight=”400″ font_family=”none”]Cover Photo: Horseshoe crabs spawning at South Reeds Beach.\u00a0Photo: Laura Chamberlin.<\/em><\/strong>[\/mk_fancy_title][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"

[vc_row css=”.vc_custom_1537359740219{margin-top: 0px !important;padding-top: 0px !important;}”][vc_column css=”.vc_custom_1537371217000{margin-top: 0px !important;padding-top: 0px !important;}”][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594737445{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;}”] How well do you know this crab that shares the Delaware Bay with us?\u00a0 Here\u2019s a refresher as you prepare for your visit on the bay. [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594887688{margin-bottom: 0px !important;}”] 1. The horseshoe […]<\/p>\n","protected":false},"author":10,"featured_media":10930,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[527],"tags":[153,154],"class_list":["post-10919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-delaware-bay-blog","tag-delaware-bay","tag-horseshoe-crabs"],"yoast_head":"\n7 Things You Didn't Know about Horseshoe Crabs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/whsrn.org\/es\/7-things-you-didnt-know-about-horseshoe-crabs\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"7 Things You Didn't Know about Horseshoe Crabs\" \/>\n<meta property=\"og:description\" content=\"[vc_row css=”.vc_custom_1537359740219{margin-top: 0px !important;padding-top: 0px !important;}”][vc_column css=”.vc_custom_1537371217000{margin-top: 0px !important;padding-top: 0px !important;}”][mk_padding_divider size=”20″][vc_column_text margin_bottom=”20″ css=”.vc_custom_1566594737445{margin-top: 0px !important;margin-bottom: 0px !important;padding-top: 0px !important;}”] How well do you know this crab that shares the Delaware Bay with us?\u00a0 Here\u2019s a refresher as you prepare for your visit on the bay. 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