{"id":3448,"date":"2021-01-02T10:27:52","date_gmt":"2021-01-02T18:27:52","guid":{"rendered":"https:\/\/calsport.org\/fisheriesblog\/?p=3448"},"modified":"2021-01-02T10:27:52","modified_gmt":"2021-01-02T18:27:52","slug":"delta-smelt-2020-status","status":"publish","type":"post","link":"https:\/\/calsport.org\/fisheriesblog\/?p=3448","title":{"rendered":"Delta Smelt \u2013 2020 Status"},"content":{"rendered":"

In a March 2020 post<\/a>, I described the status of the Delta smelt through 2019.\u00a0 This post updates the status with the most recent 2020 information.\u00a0 Delta smelt continue to be absent from the standard long-term surveys and their related indices.\u00a0 However, some Delta smelt were collected in 2020 in selected locations of the Bay-Delta during focused intensive special surveys designed to find remaining survivors.\u00a0 Larval and juvenile Delta smelt were collected in low numbers in the Bay and north Delta (Figure 1).\u00a0 Pre-adult Delta smelt were also collected in summer trawl surveys (Figure 2).<\/p>\n

The north Delta habitats where a few Delta smelt persevere continue to be plagued by constant stressful if not lethal water temperatures (Figures 3 and 4).<\/p>\n

As I stated in a prior post<\/a>, Delta smelt would benefit from increased net flows through the north Delta during the spring and summer.<\/p>\n

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Figure 1. Numbers of larval and juvenile Delta smelt collected in the spring Enhanced Delta Smelt Monitoring (EDSM) 20-mm nets. Source<\/a>.<\/p><\/div>\n

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Figure 2. Numbers of pre-adult Delta smelt collected in the summer Enhanced Delta Smelt Monitoring (EDSM) Kodiak trawls. Source<\/a>.<\/p><\/div>\n

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Figure 3. May through September 2020 water temperature and net tidally-filtered flow in the lower ship channel near Rio Vista. Note water temperatures fall 1-2\u00baC when net flows increase.<\/p><\/div>\n

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Figure 4. May through September 2020 water temperature and net tidally-filtered flow in Cache Slough near Rio Vista. Note water temperatures generally fall 1-2\u00baC when net flows increase.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

In a March 2020 post, I described the status of the Delta smelt through 2019.\u00a0 This post updates the status with the most recent 2020 information.\u00a0 Delta smelt continue to be absent from the standard long-term surveys and their related … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15,6],"tags":[],"class_list":["post-3448","post","type-post","status-publish","format-standard","hentry","category-bay-delta","category-smelt"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/posts\/3448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3448"}],"version-history":[{"count":2,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/posts\/3448\/revisions"}],"predecessor-version":[{"id":3454,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=\/wp\/v2\/posts\/3448\/revisions\/3454"}],"wp:attachment":[{"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/calsport.org\/fisheriesblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}