{"id":407,"date":"2025-09-26T06:54:28","date_gmt":"2025-09-26T06:54:28","guid":{"rendered":"https:\/\/gaco.cat\/blog\/?p=407"},"modified":"2025-10-10T07:36:30","modified_gmt":"2025-10-10T07:36:30","slug":"comparacio40anys","status":"publish","type":"post","link":"https:\/\/gaco.cat\/blog\/comparacio40anys\/","title":{"rendered":"Comparaci\u00f3 caixes niu en quasi 40 anys"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"407\" class=\"elementor elementor-407\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1c049efc e-flex e-con-boxed e-con e-parent\" data-id=\"1c049efc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2dea2593 elementor-widget elementor-widget-text-editor\" data-id=\"2dea2593\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h1 style=\"text-align: center;\"><strong>CANVI CLIM\u00c0TIC?<\/strong><\/h1><ol><li style=\"text-align: left;\"><strong>EDAT DELS POLLS <\/strong><\/li><li style=\"text-align: left;\"><strong>COM TROBEM LA DATA D&#8217;ECLOSI\u00d3 DE CADA ANY DE CADA ESP\u00c8CIE<\/strong><\/li><li style=\"text-align: left;\"><strong>QUADRE PER A PODER COMPARAR L&#8217;EDAT DE CADA ESP\u00c8CIE<\/strong><\/li><li style=\"text-align: left;\"><strong>\u00a0COM TROBEM EL NOMBRE DE POLLS CADA ANY DE CADA ESP\u00c8CIE<\/strong><\/li><li style=\"text-align: left;\"><strong>\u00a0DADES PER SEPARAT DE LES 3 ESP\u00c8CIES DESGLOSADES PER CADA ANY<\/strong><\/li><li style=\"text-align: left;\"><strong>\u00a0COM TROBEM ELS RESULTATS AGRUPANT ELS ANYS<\/strong><\/li><li style=\"text-align: left;\"><strong>\u00a0COSES A TENIR EN COMPTE<\/strong><\/li><li style=\"text-align: left;\"><strong>COSES QUE PODEN AFECTAR A L&#8217;EXACTITUT DE LES DADES<\/strong><\/li><\/ol><p style=\"text-align: left;\"><strong>1 &#8211; EDAT DELS POLLS <\/strong><\/p><p>Des de sempre, al controlar les caixes niu, si hi ha polls, anotem l&#8217;edat amb les seg\u00fcents refer\u00e8ncies:<br \/>EDAT 1: Acabats de n\u00e9ixer.<br \/>EDAT 12: Son grossets, per\u00f2 encara no tenen canons.<br \/>EDAT 2: Tenen canons.<br \/>EDAT 23: Tenen canons molt grossos, per\u00f2 encara no surten plomes<br \/>EDAT 3: Surten plomes dels canons.<br \/>EDAT 34: Estan mig plomats<br \/>EDAT 4: Estan ben plomats.<br \/>EDAT 45: Tenen les plomes grans, per\u00f2 encara no tenen edat de marxar del niu.<br \/>EDAT 5: Tenen edat de marxar del niu.<\/p><p style=\"text-align: left;\">* Per edats interm\u00e8dies, hi posem\u00a0 &#8220;+&#8221; o &#8221; -&#8221; , per exemple entre el 3 i el 34, posem 3+ i\u00a0 3++<\/p><p><strong>2 &#8211; COM TROBEM LA DATA D&#8217;ECLOSI\u00d3 DE CADA ANY DE CADA ESP\u00c8CIE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong><\/p><p>Per molestar el m\u00ednim, fem el m\u00ednim de visites, per\u00f2 les caixes que controlem, les controlem al 100% per anellar el m\u00e0xim de polls.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <br \/>Els polls m\u00e9s petits que anellem tenen canons (edat 2), per\u00f2 la majoria els anellem quan tenen plomes no massa grans.<br \/>Al llarg dels anys, hem trobat polls que estaven naixent, pel qual, quan els anellem, sabem els dies de vida que tenen.<\/p><p>Tamb\u00e9 hem trobat polls molt petits, ja nascuts (edat 1), pel qual, quan els anellem, sabem aprox. els dies de vida que tenen (restem 1 dia).<br \/>A la majoria dels nius, en les diferents visites, hem observat diferents edats dins la mateixa pollada.<br \/>De tots els polls que hem anellat el 2023,2024 i 2025, hem mesurat la cua\u00a0 i l&#8217;hem comparat amb l&#8217;edat que hi posem.<\/p><p>Amb aquestes quatre coses, hem fet el <strong>QUADRE PER A COMPARAR L&#8217;EDAT DE CADA ESP\u00c8CIE<\/strong>,\u00a0 relacionat amb els dies de vida dels polls.<br \/>Sabem la data d&#8217;anellament de cada pollada, per\u00f2 no sempre anellem els polls de la mateixa mida.<\/p><p>Amb aquest <strong>QUADRE<\/strong>, sumant o restant algun dia si s&#8217;escau, ajustem la data d&#8217;anellament, perqu\u00e8 tots els polls tinguin aprox. 10 dies.<\/p><p>Quan tenim ajustada l&#8217;edat als 10 dies, podem fer una mitjana ponderada per cada esp\u00e8cie i per cada any, per a poder comparar les diferents esp\u00e8cies amb la mateixa edat.<\/p><p>Per trobar el dia d&#8217;eclosi\u00f3:<br \/>Fem un sumatori de les multiplicacions dels polls de cada niu, pels dies transcorreguts des del dia abans del primer niu.<br \/>Aix\u00f2 ens dona un total de polls x dies. Despr\u00e9s dividim aquest sumatori pel nombre de polls, i ens dona els dies des del primer niu + 1.<br \/>Despr\u00e9s afegim aquests dies a la data del primer niu menys 1 dia i aix\u00f2 \u00e9s la data de mitjana ponderada dels polls amb 10 dies.<br \/>La data d&#8217;eclosi\u00f3 per cada any i per cada esp\u00e8cie, \u00e9s la mitjana ponderada de la data dels polls amb 10 dies de vida, menys 10 dies.<\/p><p><strong>3 &#8211; QUADRE PER A COMPARAR L&#8217;EDAT DE CADA ESP\u00c8CIE<\/strong><\/p><table style=\"height: 992px;\" width=\"831\"><tbody><tr><td width=\"75\"><strong>VIDA<\/strong><\/td><td width=\"113\"><span style=\"color: #3366ff;\"><strong>PC<\/strong><\/span><\/td><td width=\"123\"><strong>PR<\/strong><\/td><td width=\"113\"><span style=\"color: #ff0000;\"><strong>PM<\/strong><\/span><\/td><td width=\"73\"><strong>DIES<\/strong><\/td><\/tr><tr><td width=\"75\">6 DIES<\/td><td width=\"113\">\u00a0<\/td><td width=\"123\">EDAT 2<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 2<\/span><\/td><td width=\"73\">4 DIES +<\/td><\/tr><tr><td width=\"75\">7 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 2<\/span><\/td><td width=\"123\">EDAT 2+,23<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 2+,23<\/span><\/td><td width=\"73\">3 DIES +<\/td><\/tr><tr><td width=\"75\">8 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 2+<\/span><\/td><td width=\"123\">EDAT 23-<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 23+,3-<\/span><\/td><td width=\"73\">2 DIES +<\/td><\/tr><tr><td width=\"75\">9 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 23<\/span><\/td><td width=\"123\">EDAT 23<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 3<\/span><\/td><td width=\"73\">1 DIA +<\/td><\/tr><tr><td width=\"75\">10 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 3<\/span><\/td><td width=\"123\">EDAT23+,23++<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 3+<\/span><\/td><td width=\"73\">0 DIES<\/td><\/tr><tr><td width=\"75\">11 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 3+<\/span><\/td><td width=\"123\">EDAT 3<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 3++<\/span><\/td><td width=\"73\">1 DIA-<\/td><\/tr><tr><td width=\"75\">12 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 34-<\/span><\/td><td width=\"123\">EDAT 3+<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 34<\/span><\/td><td width=\"73\">2 DIES-<\/td><\/tr><tr><td width=\"75\">13 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 34<\/span><\/td><td width=\"123\">EDAT 3++<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 34+<\/span><\/td><td width=\"73\">3 DIES-<\/td><\/tr><tr><td width=\"75\">14 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 34+<\/span><\/td><td width=\"123\">EDAT 34<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 4-, 4<\/span><\/td><td width=\"73\">4 DIES-<\/td><\/tr><tr><td width=\"75\">15 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 4-<\/span><\/td><td width=\"123\">EDAT 34+<\/td><td width=\"113\"><span style=\"color: #ff0000;\">EDAT 45, 5<\/span><\/td><td width=\"73\">5 DIES-<\/td><\/tr><tr><td width=\"75\">16 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 4<\/span><\/td><td width=\"123\">EDAT34++<\/td><td width=\"113\">\u00a0<\/td><td width=\"73\">6 DIES-<\/td><\/tr><tr><td width=\"75\">17 DIES<\/td><td width=\"113\"><span style=\"color: #3366ff;\">EDAT 45, 5<\/span><\/td><td width=\"123\">EDAT 4<\/td><td width=\"113\">\u00a0<\/td><td width=\"73\">7 DIES-<\/td><\/tr><tr><td width=\"75\">18 DIES<\/td><td width=\"113\">\u00a0<\/td><td width=\"123\">EDAT 4+, 4++<\/td><td width=\"113\">\u00a0<\/td><td width=\"73\">8 DIES-<\/td><\/tr><\/tbody><\/table><p>*<span style=\"color: #3366ff;\">PC: Mallerenga blava<\/span>\u00a0\u00a0\u00a0 PR: Mallerenga Carbonera\u00a0 <span style=\"color: #ff0000;\">PM: Pardal xarrec<\/span><\/p><p><strong>4 &#8211; COM TROBEM EL NOMBRE DE POLLS CADA ANY DE CADA ESP\u00c8CIE<\/strong><\/p><p>Per trobar la mitjana de polls\/niu, dividim el nombre de polls per el nombre de nius d&#8217;aquests polls.<\/p><p><strong>5 &#8211; DADES PER SEPARAT DE LES 3 ESP\u00c8CIES DESGLOSADES PER CADA ANY<\/strong><\/p><table width=\"600\"><tbody><tr><td width=\"76\">\u00a0<\/td><td width=\"64\"><p><strong>NIUS<\/strong><\/p><\/td><td width=\"92\"><p><strong>% NIUS<\/strong><\/p><\/td><td width=\"101\"><p><strong>POLLS<\/strong><\/p><\/td><td width=\"64\"><p><strong>% POLLS<\/strong><\/p><\/td><td width=\"109\"><p><strong>ECLOSI\u00d3<\/strong><\/p><\/td><td width=\"94\"><p><strong>POLLS\/NIU<\/strong><\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 1985<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">111<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">49,6<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">678<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">57.0<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">15\/05\/85<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">6,11<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 1985<\/p><\/td><td width=\"64\"><p>41<\/p><\/td><td width=\"92\"><p>18,3<\/p><\/td><td width=\"101\"><p>234<\/p><\/td><td width=\"64\"><p>19,7<\/p><\/td><td width=\"109\"><p>20\/05\/85<\/p><\/td><td width=\"94\"><p>5,71<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM1985<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">72<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">32,1<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">278<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">23,3<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">23\/05\/85<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">3,86<\/span><\/p><\/td><\/tr><tr><td width=\"76\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"92\">\u00a0<\/td><td width=\"101\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"109\">\u00a0<\/td><td width=\"94\">\u00a0<\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 1986<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">115<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">59,9<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">759<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">64,5<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">26\/05\/86<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">6,60<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 1986<\/p><\/td><td width=\"64\"><p>42<\/p><\/td><td width=\"92\"><p>21,9<\/p><\/td><td width=\"101\"><p>271<\/p><\/td><td width=\"64\"><p>23.0<\/p><\/td><td width=\"109\"><p>23\/05\/86<\/p><\/td><td width=\"94\"><p>6,45<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM 1986<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">35<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">18,2<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">147<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">12,5<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">23\/05\/85<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">4,20<\/span><\/p><\/td><\/tr><tr><td width=\"76\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"92\">\u00a0<\/td><td width=\"101\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"109\">\u00a0<\/td><td width=\"94\">\u00a0<\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 1987<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">76<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">52,1<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">483<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">54,4<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">17\/05\/87<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">6,35<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 1987<\/p><\/td><td width=\"64\"><p>45<\/p><\/td><td width=\"92\"><p>30,8<\/p><\/td><td width=\"101\"><p>292<\/p><\/td><td width=\"64\"><p>32,9<\/p><\/td><td width=\"109\"><p>15\/05\/87<\/p><\/td><td width=\"94\"><p>6,49<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM 1987<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">25<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">17,1<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">113<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">12,7<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">16\/05\/85<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">4,52<\/span><\/p><\/td><\/tr><tr><td width=\"76\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"92\">\u00a0<\/td><td width=\"101\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"109\">\u00a0<\/td><td width=\"94\">\u00a0<\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 2023<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">40<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">32.3<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">207<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">31.6<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">02\/05\/23<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">5,17<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 2023<\/p><\/td><td width=\"64\"><p>52<\/p><\/td><td width=\"92\"><p>41.9<\/p><\/td><td width=\"101\"><p>305<\/p><\/td><td width=\"64\"><p>46,5<\/p><\/td><td width=\"109\"><p>04\/05\/23<\/p><\/td><td width=\"94\"><p>5,87<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM 2023<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">32<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">25.8<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">144<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">21.9<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">09\/05\/23<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">4,50<\/span><\/p><\/td><\/tr><tr><td width=\"76\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"92\">\u00a0<\/td><td width=\"101\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"109\">\u00a0<\/td><td width=\"94\">\u00a0<\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 2024<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">36<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">21,7<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">179<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">21,3<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">01\/05\/24<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">4,97<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 2024<\/p><\/td><td width=\"64\"><p>70<\/p><\/td><td width=\"92\"><p>42,2<\/p><\/td><td width=\"101\"><p>403<\/p><\/td><td width=\"64\"><p>48.0<\/p><\/td><td width=\"109\"><p>03\/05\/24<\/p><\/td><td width=\"94\"><p>5,76<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM 2024<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">60<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">36,1<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">258<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">30,7<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">07\/05\/24<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">4,30<\/span><\/p><\/td><\/tr><tr><td width=\"76\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"92\">\u00a0<\/td><td width=\"101\">\u00a0<\/td><td width=\"64\">\u00a0<\/td><td width=\"109\">\u00a0<\/td><td width=\"94\">\u00a0<\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #3366ff;\">PC 2025<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">42<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #3366ff;\">19.0<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #3366ff;\">250<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #3366ff;\">22,4<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #3366ff;\">07\/05\/25<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #3366ff;\">5,95<\/span><\/p><\/td><\/tr><tr><td width=\"76\"><p>PR 2025<\/p><\/td><td width=\"64\"><p>91<\/p><\/td><td width=\"92\"><p>41,2<\/p><\/td><td width=\"101\"><p>520<\/p><\/td><td width=\"64\"><p>46,6<\/p><\/td><td width=\"109\"><p>07\/05\/25<\/p><\/td><td width=\"94\"><p>5,71<\/p><\/td><\/tr><tr><td width=\"76\"><p><span style=\"color: #ff0000;\">PM 2025<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">88<\/span><\/p><\/td><td width=\"92\"><p><span style=\"color: #ff0000;\">39,8<\/span><\/p><\/td><td width=\"101\"><p><span style=\"color: #ff0000;\">345<\/span><\/p><\/td><td width=\"64\"><p><span style=\"color: #ff0000;\">31.0<\/span><\/p><\/td><td width=\"109\"><p><span style=\"color: #ff0000;\">11\/05\/25<\/span><\/p><\/td><td width=\"94\"><p><span style=\"color: #ff0000;\">3,92<\/span><\/p><\/td><\/tr><\/tbody><\/table><p>*<span style=\"color: #3366ff;\">PC: Mallerenga blava<\/span>\u00a0\u00a0\u00a0 PR: Mallerenga Carbonera\u00a0 <span style=\"color: #ff0000;\">PM: Pardal xarrec<\/span><\/p><p><strong>6 \u2013 COM TROBEM ELS RESULTATS AGRUPANT ELS ANYS<\/strong><\/p><p>Per a trobar el resultat agrupant els anys, fem la mitjana del resultat dels 3 anys,prescindint del nombre de dades de cada any.<\/p><table width=\"644\"><tbody><tr><td width=\"113\">\u00a0<\/td><td width=\"60\">NIUS (N)<\/td><td width=\"85\">% NIUS (%N)<\/td><td width=\"65\">POLLS (P)<\/td><td width=\"90\">% POLLS (%P)<\/td><td width=\"85\">ECLOSI\u00d3 \u20ac<\/td><td width=\"146\">POLLS\/NIU (P\/N)<\/td><\/tr><tr><td><span style=\"color: #3366ff;\">PC 85,86,87<\/span><\/td><td><span style=\"color: #3366ff;\">302 N<\/span><\/td><td><span style=\"color: #3366ff;\">53,9 %N<\/span><\/td><td><span style=\"color: #3366ff;\">1920 P<\/span><\/td><td><span style=\"color: #3366ff;\">58,6 %P<\/span><\/td><td><span style=\"color: #3366ff;\">19 de maig<\/span><\/td><td><span style=\"color: #3366ff;\">6,36 P\/N<\/span><\/td><\/tr><tr><td><span style=\"color: #3366ff;\">PC 23,24,25<\/span><\/td><td><span style=\"color: #3366ff;\">118 N<\/span><\/td><td><span style=\"color: #3366ff;\">24,3 %N<\/span><\/td><td><span style=\"color: #3366ff;\">636 P<\/span><\/td><td><span style=\"color: #3366ff;\">25,1 %P<\/span><\/td><td><span style=\"color: #3366ff;\">3 de maig<\/span><\/td><td><span style=\"color: #3366ff;\">5,36 P\/N<\/span><\/td><\/tr><tr><td colspan=\"7\"><span style=\"color: #3366ff;\">PC 1980\u2019- 2020\u2019 baixen un 57.2 %, avancen 16 dies eclosi\u00f3 i els polls\/ niu baixen un 15.7 %<\/span><\/td><\/tr><tr><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><\/tr><tr><td>PR 85,86,87<\/td><td>128 N<\/td><td>23,7 %N<\/td><td>797 P<\/td><td>25,2 %P<\/td><td>19 de maig<\/td><td>6,22 P\/N<\/td><\/tr><tr><td>PR 23,24,25<\/td><td>213 N<\/td><td>41,8 %N<\/td><td>1228 P<\/td><td>47 %P<\/td><td>5 de maig<\/td><td>5,78 P\/N<\/td><\/tr><tr><td colspan=\"7\">PR 1980\u2019- 2020\u2019 pugen un 86.50 %, avancen 14 dies eclosi\u00f3 i els polls\/ niu baixen un 7.1 %<\/td><\/tr><tr><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><\/tr><tr><td><span style=\"color: #ff0000;\">PM 85,86,87<\/span><\/td><td><span style=\"color: #ff0000;\">132 N<\/span><\/td><td><span style=\"color: #ff0000;\">22,5 %N<\/span><\/td><td><span style=\"color: #ff0000;\">538 P<\/span><\/td><td><span style=\"color: #ff0000;\">16,2 %P<\/span><\/td><td><span style=\"color: #ff0000;\">21 de maig<\/span><\/td><td><span style=\"color: #ff0000;\">4,19 P\/N<\/span><\/td><\/tr><tr><td><span style=\"color: #ff0000;\">PM 23,24,25<\/span><\/td><td><span style=\"color: #ff0000;\">180 N<\/span><\/td><td><span style=\"color: #ff0000;\">33,9 %N<\/span><\/td><td><span style=\"color: #ff0000;\">747 P<\/span><\/td><td><span style=\"color: #ff0000;\">27,9 %P<\/span><\/td><td><span style=\"color: #ff0000;\">9 de maig<\/span><\/td><td><span style=\"color: #ff0000;\">4,24 P\/N<\/span><\/td><\/tr><tr><td colspan=\"7\"><span style=\"color: #ff0000;\">PM 1980\u2019-2020\u2019 pugen un 72.2 %, avancen 12 dies eclosi\u00f3 i els polls\/niu pugen un 1.2 %<\/span><\/td><\/tr><tr><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><\/tr><tr><td>TOT 85,86,87<\/td><td>562 N<\/td><td>\u00a0<\/td><td>3255 P<\/td><td>\u00a0<\/td><td>20 de maig<\/td><td>5,59 P\/N<\/td><\/tr><tr><td>TOT 23,24,25<\/td><td>511 N<\/td><td>\u00a0<\/td><td>2611P<\/td><td>\u00a0<\/td><td>6 de maig<\/td><td>5,13 P\/N<\/td><\/tr><tr><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><td>\u00a0<\/td><\/tr><tr><td colspan=\"5\">En total 5.866 polls en 1.073 nius de les 3 esp\u00e8cies.<\/td><td>\u00a0<\/td><td>\u00a0<\/td><\/tr><\/tbody><\/table><p><strong>7 \u2013 COSES A TENIR EN COMPTE<\/strong><\/p><ul><li><span lang=\"CA\" style=\"font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;\"><span style=\"font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-alternates: normal; font-size-adjust: none; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-variant-position: normal; font-variant-emoji: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';\">\u00a0<\/span><\/span><!--[endif]--><span lang=\"CA\">En aquest estudi, hi ha participat durant m\u00e9s de 40 anys moltes persones, totes de manera volunt\u00e0ria del GACO i totes les dades son del GACO.<\/span><\/li><li><span style=\"font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-alternates: normal; font-size-adjust: none; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-variant-position: normal; font-variant-emoji: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';\">\u00a0<\/span><span lang=\"CA\" style=\"font-size: 16px; text-indent: -18pt;\">Totes les dades son de 1\u00aa posta i nom\u00e9s dels voltants de Vic (entre 450 m i 700 m altitud).<\/span><\/li><li>En aquest estudi nom\u00e9s hi ha dades dels polls vius que tenen com a m\u00ednim canons (edat 2)<\/li><li>Si en trobem de morts m\u00e9s petits no els comptem, tampoc hi posem les caixes que no hi han criat, ni els nius que no han anat b\u00e9 o depredats.<\/li><li>A vegades hi ha pollades que no tots els polls tenen la mateixa mida, considerem l\u2019edat de la pollada com una edat interm\u00e8dia.<\/li><li>Tant a l\u2019hora de fer les mitjanes com les mitjanes ponderades, els decimals fins a 0.50 els hem arrodonit al nombre anterior i a partir de 0.50 comptem el nombre seg\u00fcent.<\/li><\/ul><p><strong>8 \u2013 COSES QUE PODEN AFECTAR A L\u2019EXACTITUD DE LES DADES<\/strong><\/p><ul><li>Els polls poden cr\u00e9ixer m\u00e9s o menys r\u00e0pid, b\u00e0sicament depenent del temps o del tiberi.<\/li><li>Per minimitzar l&#8217;error degut al possible diferent creixement, comparem els polls com si tinguessin 10 dies.<\/li><li>Als anys 1985, 1986 i 1987 anot\u00e0vem l&#8217;edat, per\u00f2 no mesur\u00e0vem la cua de tots els polls, per aix\u00f2 aquest estudi nom\u00e9s es basa amb l&#8217;edat, que es menys exacte que fer-ho amb la mesura de la cua.<\/li><li>De tots els anellaments tenim anotada la data , per\u00f2 en molts no tenim l&#8217;hora. No hem incl\u00f2s l\u2019hora en aquest estudi, aix\u00f2 pot donar una petita variaci\u00f3, si anellem a 1\u00aa hora del mat\u00ed o a final de la tarda.<\/li><\/ul><p><strong>Per a qualsevol consulta o altres explicacions o comentaris :<\/strong><br \/><strong>Joan Aymerich (GACO) 667685131.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>CANVI CLIM\u00c0TIC? EDAT DELS POLLS COM TROBEM LA DATA D&#8217;ECLOSI\u00d3 DE CADA ANY DE CADA ESP\u00c8CIE QUADRE PER A PODER [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"unboxed","site-sidebar-style":"unboxed","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-407","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/posts\/407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/comments?post=407"}],"version-history":[{"count":42,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/posts\/407\/revisions"}],"predecessor-version":[{"id":527,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/posts\/407\/revisions\/527"}],"wp:attachment":[{"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/media?parent=407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/categories?post=407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaco.cat\/blog\/wp-json\/wp\/v2\/tags?post=407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}