{"id":17993,"date":"2021-04-27T13:36:12","date_gmt":"2021-04-27T18:36:12","guid":{"rendered":"https:\/\/wildlifepreservation.qa.caorda.com\/blog\/?p=14089"},"modified":"2023-04-18T12:01:55","modified_gmt":"2023-04-18T17:01:55","slug":"booming-year-for-frog-eggs","status":"publish","type":"post","link":"https:\/\/wildlifepreservation.ca\/fr\/blog\/booming-year-for-frog-eggs\/","title":{"rendered":"Booming year for frog eggs"},"content":{"rendered":"<div id='av_section_1'  class='avia-section av-av_section-c255ec14b78a368bb6b71c4b8da61d3d main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  blog-inner avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-17993'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0ehj5-aea7f5cbee10ca114d5b5c6bd9869943\">\n#top .av-special-heading.av-lfw0ehj5-aea7f5cbee10ca114d5b5c6bd9869943{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-lfw0ehj5-aea7f5cbee10ca114d5b5c6bd9869943 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-lfw0ehj5-aea7f5cbee10ca114d5b5c6bd9869943 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-lfw0ehj5-aea7f5cbee10ca114d5b5c6bd9869943 av-special-heading-h1 blockquote modern-quote modern-centered  avia-builder-el-1  el_before_av_post_metadata  avia-builder-el-first'><h1 class='av-special-heading-tag'  itemprop=\"headline\"  >Booming year for frog eggs<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_post_metadata-e5e5d355ee6201e18ee5d5bc174ee0f3\">\n#top .av-post-metadata-container.av-av_post_metadata-e5e5d355ee6201e18ee5d5bc174ee0f3{\nfont-size:16px;\n}\n#top .av-post-metadata-container.av-av_post_metadata-e5e5d355ee6201e18ee5d5bc174ee0f3 .av-post-metadata-container-inner{\nfont-size:16px;\n}\n<\/style>\n<div  class='av-post-metadata-container av-av_post_metadata-e5e5d355ee6201e18ee5d5bc174ee0f3 av-metadata-container-align-left  avia-builder-el-2  el_after_av_heading  avia-builder-el-last  av-metadata-container-1'><div class='av-post-metadata-container-inner'><span class=\"av-post-metadata-content av-post-metadata-meta-content\"><span class=\"av-post-metadata-content av-post-metadata-published\"><span class=\"av-metadata-before av-metadata-before-published\">Publi\u00e9 le<\/span><span class=\"av-post-metadata-published-date\" >avril 27, 2021<\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\"><\/span><span class=\"av-post-metadata-content av-post-metadata-author\"  itemprop=\"author\" ><span class=\"av-metadata-before av-metadata-before-author\">par<\/span><span class=\"av-post-metadata-author-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/author\/andrea-gielens\/\"  rel=\"author\">Andrea Gielens<\/a><\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\"><\/span><span class=\"av-post-metadata-content av-post-metadata-category\"><span class=\"av-metadata-before av-metadata-before-categories\">|<\/span><span class=\"av-post-metadata-category-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/news-and-events\/\" >Actualit\u00e9s et \u00e9v\u00e9nements<\/a><\/span>, <span class=\"av-post-metadata-category-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/oregon-spotted-frog-program\/\" >Grenouille macul\u00e9e de l'Oregon<\/a><\/span>, <span class=\"av-post-metadata-category-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/species-at-risk\/\" >Esp\u00e8ces menac\u00e9es<\/a><\/span><\/span><\/span><\/div><\/div>\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div><div id='av_section_2'  class='avia-section av-av_section-c0196357fc2e3bceeb8b0e3838476e8b main_color avia-section-no-padding avia-no-border-styling  avia-builder-el-3  el_after_av_section  el_before_av_section  blog-inner avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-17993'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_full-4a6e4a13cfc46c3f9254a43a116880a0\">\n.flex_column.av-av_one_full-4a6e4a13cfc46c3f9254a43a116880a0{\nbackground-color:#f8fbf4;\n}\n<\/style>\n<div  class='flex_column av-av_one_full-4a6e4a13cfc46c3f9254a43a116880a0 av_one_full  avia-builder-el-4  avia-builder-el-no-sibling  light-section first flex_column_div'     ><section  class='av_textblock_section av-lfw0f6bw-cc8a13f1050140ff5eeb13fc91c9e08e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h5><em> The Oregon spotted frog is Canada\u2019s most endangered frog, with fewer than 300 breeding individuals in the wild. The recovery plan for Oregon spotted frog calls for conservation breeding, headstarting and release to re-establish viable populations in at least six sites. Wildlife Preservation Canada began coordinating these efforts in 2010, adding a conservation breeding program to the headstarting work taking place at the Greater Vancouver Zoo. This expanded on the breeding efforts underway at the Vancouver Aquarium. The 2021 breeding season is off to to a booming start!<br \/>\n<\/em><\/h5>\n<\/div><\/section><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_3'  class='avia-section av-av_section-07697afc0c8c61850a5a26bd6d3ca3fe main_color avia-section-default avia-no-border-styling  avia-builder-el-6  el_after_av_section  el_before_av_section  species-inner-content-intro-wrapper avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-17993'><div class='entry-content-wrapper clearfix'>\n<div  class='flex_column av-av_one_full-7714eba142aeda1f8b5272a3c372b279 av_one_full  avia-builder-el-7  avia-builder-el-no-sibling  first flex_column_div'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0goaz-150138d273b15c8ed3f1386e43f8ca37\">\n.avia-image-container.av-lfw0goaz-150138d273b15c8ed3f1386e43f8ca37 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lfw0goaz-150138d273b15c8ed3f1386e43f8ca37 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lfw0goaz-150138d273b15c8ed3f1386e43f8ca37 av-styling- avia-align-center  avia-builder-el-8  el_before_av_textblock  avia-builder-el-first'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-37915 avia-img-lazy-loading-not-37915 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/frog-hug-1080x1080-1.jpg' alt='' title='frog-hug-1080x1080'  height=\"1080\" width=\"1080\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lfw0h3n5-a70d705ba23ecbdf6d4f41463d154ce1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The breeding season for Oregon spotted frogs (OSF) has proven to be exciting, busy and abundant. We tried a few different husbandry changes in WPC\u2019s breeding program this year. Some changes were planned and some were based on our real-time observations as we watched the egg-laying season of wild frogs.<\/p>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lfw0i7nh-dd59c86d5d6ac919dc855c84a0607c5e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>It all starts with communication.<\/strong><\/p>\n<p>Shouldn\u2019t it always? We communicated closely with the team surveying frogs in the wild. By mimicing the behaviour of wild frogs, we hoped to increase the chances of healthy and successful breeding in our conservation tubs. We also hoped to avoid past years\u2019s issues when our overzealous males moved into amplexus position (where the male tightly grasps the female) very early. This early amplexus was resulting in what is effectively frog bedsores on the females, which can lead to infection and death.<\/p>\n<p>To avoid this we planned to keep the males and females in separate tubs over winter, so they wouldn\u2019t have access to each other until the time was right. The field crews reported that they often see a lot of movement by males right before the appearance of eggs. That got us to thinking. Maybe the males are moving more during breeding season and aren\u2019t \u201chibernating\u201d around the females, further confirming our decision to keep the males and females separate.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0ja2t-672da1a0568bf6b8b9842bc8e9d4cb06\">\n.avia-image-container.av-lfw0ja2t-672da1a0568bf6b8b9842bc8e9d4cb06 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lfw0ja2t-672da1a0568bf6b8b9842bc8e9d4cb06 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lfw0ja2t-672da1a0568bf6b8b9842bc8e9d4cb06 av-styling- avia-align-center  avia-builder-el-11  el_after_av_textblock  el_before_av_textblock'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-37914 avia-img-lazy-loading-not-37914 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/20210318_111737.jpg' alt='' title='20210318_111737'  height=\"1064\" width=\"1023\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lfw0k161-ce148bce754e008a4ab5d237ab023809'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Amplexus position, where the male tightly grasps the female during mating.<\/em><\/p>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lfw0l77d-314e2fc8ec61751c4cd6964e6d0b4228'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Frog, meet frog.<\/strong><\/p>\n<p>Once the field team reported the frogs were moving in the wild, we prepped our tanks for introductions. One of the main things we do to put frogs in the mood to breed is drop the water in the tanks really low \u2013 so low that there isn\u2019t more than one inch of standing water above the submerged vegetation and debris at the bottom of the tank. In the wild, frogs lay their eggs in shallow water, when water levels naturally drop right around breeding time. We also make sure there are plenty of emergent plants and less open water, further mimicing wild laying sites.<\/p>\n<p><strong>And then we wait.<\/strong><\/p>\n<p>In a few days we started to see egg masses, lots of them. One thing we noticed right away is how closely the egg laying pattern was matching the wild. In previous years the females in the captive program laid their eggs gradually, over the course of a few weeks. One or two egg masses a night, and scattered around the tank and not clustered together. This is on contrast to wild egg masses which tend to be laid in a relatively tight time frame and are laid clustered together in a large group.<\/p>\n<p><strong>Our females were behaving more like wild females.<\/strong><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0luar-1049276d4a7bcef8cdd6e79dfc7055a3\">\n.avia-image-container.av-lfw0luar-1049276d4a7bcef8cdd6e79dfc7055a3 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lfw0luar-1049276d4a7bcef8cdd6e79dfc7055a3 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lfw0luar-1049276d4a7bcef8cdd6e79dfc7055a3 av-styling- avia-align-center  avia-builder-el-14  el_after_av_textblock  el_before_av_textblock'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-37916 avia-img-lazy-loading-not-37916 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/IMG-20210307-WA0002_182555795490616-1024x768-1.jpg' alt='' title='IMG-20210307-WA0002_182555795490616-1024x768'  height=\"768\" width=\"1024\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-lfw0miwm-412b69d08a74b5bdcdbdf5d79a178e4e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><em>Oregon spotted frog egg masses<\/em><\/p>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-lfw0noae-70037dba6e56fcd16f5cab7ee5ea0435'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>We also noticed out of the first 14 egg masses\u2026all were laid in one tub, the tub the females were overwintered in. Interesting. With that many masses being laid we would expect to have at least some in the other tubs, which had held males over winter. To satisfy our curiosity we transferred some pairs, who were already in breeding position back into the tub that held females overwinter.<\/p>\n<p><strong>BOOM!<\/strong><\/p>\n<p>Within 20 hours of being transferred from the male overwinter tub to the female, all the females had laid their eggs, again in a tight group and right were the females had laid previously. Must be a nice spot!<\/p>\n<p>So we tried again. We removed the laid egg masses to their hatching tubs (to avoid them being trampled by the adults), we moved the frogs that had laid into a holding tank and moved in more pairs. These pairs didn\u2019t even wait a day, they laid within 5 hours of being transferred into the female overwinter tank.<\/p>\n<p><strong>That got us thinking\u2026is there actually \u201csomething in the water\u201d? <\/strong><\/p>\n<p>Well, we don\u2019t know, but we suspect so! Since we have one shot per year to observe anything related to frog breeding we have to wait till 2022 to develop and test any further hypothesis, but as of now we have great success! Not only did we get 41 of our 43 females to breed, 19 of those females were only 2 years old, which is young for an Oregon spotted frog.<\/p>\n<p>As a result of getting so many females to lay we also had no female death due to egg binding. Egg binding has been a problem in previous years, where females just seemed to not be able to release their eggs. This causes infection and ultimately death.<\/p>\n<p><strong>Now to see how many eggs develop and hatch \u2013 stay tuned!<\/strong><\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0obsp-424c29af8cc161e7ba36c61f515bf193\">\n.avia-image-container.av-lfw0obsp-424c29af8cc161e7ba36c61f515bf193 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lfw0obsp-424c29af8cc161e7ba36c61f515bf193 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lfw0obsp-424c29af8cc161e7ba36c61f515bf193 av-styling- avia-align-center  avia-builder-el-17  el_after_av_textblock  avia-builder-el-last'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-37917 avia-img-lazy-loading-not-37917 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/OSF-Pair-1.jpg' alt='' title='OSF-Pair'  height=\"734\" width=\"734\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div><\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_4'  class='avia-section av-av_section-c255ec14b78a368bb6b71c4b8da61d3d main_color avia-section-default avia-no-border-styling  avia-builder-el-18  el_after_av_section  avia-builder-el-last  blog-inner avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-17993'><div class='entry-content-wrapper clearfix'>\n<div  class='flex_column av-av_one_full-797d6728893cdc55557a7d7ad6dd81b4 av_one_full  avia-builder-el-19  avia-builder-el-no-sibling  author-section first flex_column_div'     ><section  class='av_textblock_section av-lfw0pkb6-fa7e09e4715dfae363fff7a08a8cef5c'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 style=\"text-align: left;\">Andrea Gielens<\/h3>\n<h5 style=\"text-align: left;\">Lead Biologist \u2013 Fraser Valley Wetlands Recovery Program<\/h5>\n<p>Andrea manages WPC\u2019s captive breeding and release programs for the Oregon spotted frog and the coastal western painted turtle. Andrea has studied at-risk reptiles and amphibians in Canada and abroad, including a term at the Durrell Wildlife Conservation Trust in Jersey. Andrea also manages the Taylor\u2019s checkerspot butterfly recovery program in BC.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lfw0r1jn-359cb65f435f466b1aea5d31aef34fdd\">\n.avia-image-container.av-lfw0r1jn-359cb65f435f466b1aea5d31aef34fdd img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-lfw0r1jn-359cb65f435f466b1aea5d31aef34fdd .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-lfw0r1jn-359cb65f435f466b1aea5d31aef34fdd av-styling- avia-align-center  avia-builder-el-21  el_after_av_textblock  avia-builder-el-last  author-pic'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-36915 avia-img-lazy-loading-not-36915 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2022\/04\/Andrea-gielens-for-bio-300x300.jpg' alt='' title='Andrea-gielens-for-bio'  height=\"300\" width=\"300\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":31,"featured_media":37916,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-17993","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-events","specific-species-oregon-spotted-frog-program","specific-species-species-at-risk"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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