{"id":2115,"date":"2019-03-07T16:00:45","date_gmt":"2019-03-07T16:00:45","guid":{"rendered":"https:\/\/blog.tetra.net\/en\/en\/?p=2115"},"modified":"2020-11-20T06:26:48","modified_gmt":"2020-11-20T06:26:48","slug":"un-crustaceu-plin-de-caracter","status":"publish","type":"post","link":"https:\/\/blog.tetra.net\/ro-ro\/un-crustaceu-plin-de-caracter\/","title":{"rendered":"Un crustaceu plin de caracter"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Racul albastru: un crustaceu plin de caracter<\/h2>\n\n\n\n<p>\u00cen estul Floridei, raci lene\u0219i, maronii, se t\u00e2r\u0103sc de-a lungul albiei r\u00e2ului St. John, un r\u00e2u care curge destul lent. Dac\u0103 te ui\u021bi la specia de rac s\u0103lbatic denumit\u0103 racul albastru (Procambarus alleni), s-ar putea s\u0103 nu vezi neap\u0103rat de ce at\u00e2t de mul\u021bi acvari\u0219ti sunt mari fani ai acestei creaturi. Cu toate astea, exist\u0103 \u0219i o versiune de un albastru str\u0103lucitor: creat\u0103 prin \u00eenmul\u021bire controlat\u0103, racul albastru este foarte tr\u0103g\u0103tor \u0219i relativ u\u0219or de \u00eentre\u021binut &#8211; de\u0219i acest lucru este posibil doar \u00een acvariile de ap\u0103 dulce.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Consumatori f\u0103r\u0103 prea mari preten\u021bii<\/h2>\n\n\n\n<p>\u00cen ciuda faptului c\u0103 tr\u0103ie\u0219te numai \u00een ap\u0103 proasp\u0103t\u0103, c\u0103 are abdomenul alungit, patru perechi de picioare \u0219i dou\u0103 gheare mari, non-exper\u021bii sau novicii \u00een ale acvaristicii \u00eenc\u0103 \u00eel confund\u0103 pe frumu\u0219elul rac albastru cu un homar mic. Crustaceul \u00ee\u0219i folose\u0219te picioarele \u0219i ghearele din fa\u021b\u0103 pentru a prinde \u0219i m\u00e2nca tot felul de delicii gustoase, cum ar fi plantele acvatice delicate, frunzele moarte sau hoituri. \u00cen acvariu, racului albastru \u00eei place s\u0103 m\u0103n\u00e2nce maz\u0103re sau morcovi felia\u021bi, dar \u0219i castravete.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Dac\u0103 reu\u0219e\u0219te s\u0103-i prind\u0103, racul se bucur\u0103 \u0219i de c\u00e2\u021biva pe\u0219ti\u0219ori la mas\u0103, de aceea nu este o idee inspirat\u0103 s\u0103 fie a\u0219eza\u021bi \u00een acela\u0219i acvariu. <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"550\" src=\"https:\/\/blog.tetra.net\/en\/en\/wp-content\/uploads\/2019\/03\/Uwe-Frontal_1000x550.jpg\" alt=\"\" class=\"wp-image-2117\" srcset=\"https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Uwe-Frontal_1000x550.jpg 1000w, https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Uwe-Frontal_1000x550-727x400.jpg 727w, https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Uwe-Frontal_1000x550-768x422.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption>\u00a9 Tetra<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Un individualist&#8230; \u00eenarmat <\/h2>\n\n\n\n<p>La fel ca multe alte crustacee, racii alba\u0219tri sunt creaturi solitare. Au propriile teritorii cu mici grote \u00een care tr\u0103iesc \u0219i pe care le ap\u0103r\u0103 cu d\u00e2rzenie de musafirii nepofti\u021bi. Dac\u0103 dore\u0219ti s\u0103 p\u0103strezi mai mul\u021bi raci alba\u0219tri \u00een acela\u0219i acvariu, trebuie, prin urmare, s\u0103 te asigura\u021bi c\u0103 exist\u0103 suficient spa\u021biu \u0219i s\u0103 le oferi\u021bi mai multe grote \u00een care creaturile s\u0103 poat\u0103 dormi sau s\u0103 se ascunde, astfel \u00eenc\u00e2t s\u0103 nu \u00eenceap\u0103 s\u0103 lupte.<\/p>\n\n\n\n<p>Dac\u0103 racul albastru se simte amenin\u021bat, \u00ee\u0219i \u00eentoarce ghearele spre \u201ddu\u0219man\u201d, gata s\u0103 se apere. Dac\u0103 amenin\u021barea pare prea mare, \u00eencearc\u0103 s\u0103-\u0219i plieze rapid abdomenul \u0219i s\u0103 se retrag\u0103, departe de pericol. <\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns has-2-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"320\" height=\"320\" src=\"https:\/\/blog.tetra.net\/en\/en\/wp-content\/uploads\/2019\/03\/Uwe-Pflanze-320x320.jpg\" alt=\"\" class=\"wp-image-2118\" srcset=\"https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Uwe-Pflanze-320x320.jpg 320w, https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Uwe-Pflanze-320x320-280x280.jpg 280w\" sizes=\"auto, (max-width: 320px) 100vw, 320px\" \/><figcaption>\u00a9 Tetra<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"> Lumea senzorial\u0103 a racului albastru<\/h2>\n\n\n\n<p>Natura diurn\u0103 a acestor creaturi face u\u0219oar\u0103 observarea lor \u0219i \u00eenlesne\u0219te descifrarea comportamentului lor \u00een acvarii. Proced\u00e2nd astfel, este interesant de \u0219tiut c\u0103 aspectul lor anatomic are o serie de caracteristici speciale. Se pot observa cu u\u0219urin\u021b\u0103 cei doi ochi compu\u0219i, care le ajut\u0103 pe crustacee s\u0103-\u0219i fac\u0103 o idee despre \u00eemprejurimi. \u0218tiai c\u0103 \u00ee\u0219i folosesc picioarele nu doar pentru a se deplasa, dar \u0219i pentru a-\u0219i gusta m\u00e2ncarea?<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Dac\u0103 \u00eencerci s\u0103 le vezi urechile, vei c\u0103uta \u00een zadar, deoarece racii alba\u0219tri folosesc pielea dintre articula\u021bii pentru a recepta undele sonore. De asemenea, au o pereche de antenu\u021be, pe care le folosesc pentru a-\u0219i sim\u021bi drumul \u00een jurul lor, pentru a ob\u021bine o imagine mai bun\u0103 a \u00eemprejurimilor. \u00cen plus, acestea au la baz\u0103 un organ pe care racii \u00eel folosesc pentru a elibera urina \u00een ap\u0103.<\/p>\n\n\n\n<p><\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u00ce\u0219i leap\u0103d\u0103 pielea veche<\/h2>\n\n\n\n<p>La fel ca toate crustaceele, racul albastru are un exoschelet. Aceast\u0103 cochilie chitinoas\u0103 stocheaz\u0103 mai multe minerale, inclusiv calciu, care o fac puternic\u0103. De\u0219i aceast\u0103 coaj\u0103 exterioar\u0103 protejeaz\u0103 racii albastri \u00eempotriva pr\u0103d\u0103torilor, are \u0219i un dezavantaj major: pentru a cre\u0219te, racii trebuie s\u0103-\u0219i lepede, \u00een mod regulat, vechea&#8230; coaj\u0103. Aceasta este o perioad\u0103 critic\u0103 pentru ei, deoarece se pot bloca \u00een vechea coaj\u0103, fiind \u00een pericol de a muri.<\/p>\n\n\n\n<p>C\u00e2nd vine timpul s\u0103-\u0219i lepede cochilia, racii m\u0103n\u00e2nc\u0103 mult mai pu\u021bin \u0219i se ascund. \u00cen cele din urm\u0103, vechea coaj\u0103 se rupe de pe spate \u0219i crustaceul se pompeaz\u0103 plin de ap\u0103 pentru a-\u0219i dezbr\u0103ca vechea piele, la fel ca pe o hain\u0103. Accelereaz\u0103 procesul folosind lovituri puternice ale cozii.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cei care au carapacea moale au nevoie de protec\u021bie<\/h2>\n\n\n\n<p>Ini\u021bial, noua coaj\u0103 este \u00eenc\u0103 moale \u0219i nu ofer\u0103 racului albastru acela\u0219i nivel de protec\u021bie cu care era obi\u0219nuit de la vechea sa \u201earmur\u0103\u201d. Delicatele crustacee cu coaj\u0103 moale, a\u0219a cum sunt cunoscute \u00een acest stadiu, sunt o prad\u0103 u\u0219oar\u0103. Chiar \u0219i \u201dcolegii\u201d lor din aceea\u0219i specie \u00eei vor ataca dac\u0103 li se va da ocazia. De \u00eendat\u0103 ce picioarele sale func\u021bioneaz\u0103 din nou, crustaceul  caut\u0103, prin urmare, protec\u021bie, prin ascunderea sau t\u00e2r\u00e2rea pe sub plantele din ap\u0103.<\/p>\n\n\n\n<p>Lep\u0103d\u00e2ndu-\u0219i \u00een mod regulat cochilia, racul albastru poate cre\u0219te, \u00een general, \u00eentre zece \u0219i doisprezece centimetri lungime &#8211; de\u0219i au fost v\u0103zute \u0219i exemplare cu o lungime de 15 centimetri.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns has-2-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Femelele prefer\u0103 masculii mai mici<\/h2>\n\n\n\n<p>Racii alba\u0219tri ating maturitatea sexual\u0103 cu mult \u00eenainte de a ajunge la m\u0103rimea lor complet\u0103; femelele \u00eencep s\u0103 fie interesate de sexul opus c\u00e2nd m\u0103soar\u0103 circa 3,5 centimetri. \u00cen alegerea unei perechi, un lucru este deosebit de importan este acela ca masculul s\u0103 fie mai mic dec\u00e2t femela.<\/p>\n\n\n\n<p><br> Procesul de \u00eemperechere \u00een sine pare pu\u021bin dur: pentru a preveni r\u0103nirea, masculul \u00eentoarce femela pe spate \u0219i o fixeaz\u0103 cu ghearele. Cuplul se poate \u00eentinde apoi pe abdomen. Masculul \u00ee\u0219i folose\u0219te acum organul sexual, cunoscut sub numele de \u201egonopod\u201d, pentru a o insemina. <\/p>\n\n\n\n<p>Femela crustaceu poart\u0103 ou\u0103le fertilizate sub abdomen, unde acestea se dezvolt\u0103 \u00een larve de raci sub \u00eengrijirea protectoare a mamei. Dup\u0103 ce frumuse\u021bea acestei perioade se sf\u00e2r\u0219e\u0219te, cei 50 &#8211; 100 de mini &#8211; r\u0103cu\u0219ori trebuie s\u0103 fie pruden\u021bi at\u00e2t fa\u021b\u0103 de proprii p\u0103rin\u021bi, c\u00e2t \u0219i de fra\u021bii lor.<\/p>\n\n\n\n<p><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"320\" height=\"320\" src=\"https:\/\/blog.tetra.net\/en\/en\/wp-content\/uploads\/2019\/03\/Blauer-Floridakrebs_Fotolia_88300813_X_320x320.jpg\" alt=\"\" class=\"wp-image-2119\" srcset=\"https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Blauer-Floridakrebs_Fotolia_88300813_X_320x320.jpg 320w, https:\/\/blog.tetra.net\/ro-ro\/wp-content\/uploads\/2019\/03\/Blauer-Floridakrebs_Fotolia_88300813_X_320x320-280x280.jpg 280w\" sizes=\"auto, (max-width: 320px) 100vw, 320px\" \/><figcaption>\u00a9 panda3800 \u2013 Fotolia\n<\/figcaption><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Racul albastru: un crustaceu plin de caracter \u00cen estul Floridei, raci lene\u0219i, maronii, se t\u00e2r\u0103sc de-a lungul albiei r\u00e2ului St. John, un r\u00e2u care curge destul lent. Dac\u0103 te ui\u021bi la specia de rac s\u0103lbatic denumit\u0103 racul albastru (Procambarus alleni), s-ar putea s\u0103 nu vezi neap\u0103rat de ce at\u00e2t de mul\u021bi acvari\u0219ti sunt mari fani [&#8230;]\n","protected":false},"author":1,"featured_media":2116,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[163],"tags":[263,229],"class_list":["post-2115","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pesti","tag-crustacee","tag-racul-albastru"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Un crustaceu plin de caracter - Tetra Advanced Fishkeeper Blog<\/title>\n<meta name=\"description\" content=\"Racul albastru este, \u00eentr-adev\u0103r, un crustaceu plin de caracter. \u0218tiai c\u0103 mul\u021bi acvari\u0219ti \u00eencep\u0103tori confund\u0103 racii alba\u0219tri cu homarii mici?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.tetra.net\/ro-ro\/un-crustaceu-plin-de-caracter\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un crustaceu plin de caracter - 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