Nekton
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Transcript of Nekton
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NEKTON
• NEKTON (OD GRČ. RIJEČI NEKTOS=PLIVAJUĆI) – OBUHVATA ŽIVOTINJE KOJE SU SPOSOBNE ZA SAMOSTALNO KRETANJE KROZ VODU.
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RIBE
POZNATO JE OKO 27.000 VRSTA RIBA
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MORSKI PSI
• MORSKI PSI SU NASTALI PRIJE 350 MILIONA GODINA
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MORSKI PSI
POSTOJE 354 VRSTE MORSKIH PASA
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MORSKI PSI
MORSKI PSI IMAJU PO 5 ŠKRŽNIH PROREZA
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MORSKI PAS MODRULJ
• MORSKI PAS MODRULJ (PLAVA AJKULA) DOSTIŽE DUŽINU 3-4,5 METARA I TEŽINU OD 150 KILOGRAMA
•
• PLAVA AJKULA - MEĐU NAJBRŽIM AJKULAMA- HRANI SE UGLAVNOM LIGNJAMA- SMATRA SE OPASNOM - REGISTROVANO VIŠE NAPADA NA LJUDE- MOŽE SE NAĆI I U JADRANU
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VELIKA BIJELA AJKULA
• VELIKA BIJELA AJKULA - DUGA JE 4 - 6 METARA I TEŠKA OKO 2 TONE- ZABILJEŽENO VIŠE NAPADA NA LJUDE - ZUBI JOJ MOGU BITI DO 7,5 CENTIMETARA DUGI
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VELIKA BIJELA AJKULA
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VELIKA BIJELA AJKULA
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VELIKA BIJELA AJKULA
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MAKO AJKULA
• MAKO AJKULA JE NAJBRŽA AJKULA
PLIVA BRZINOM OD 80 KILOMETARA NA SAT
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MAKO AJKULA
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AJKULA ČEKIĆARA-MLAT
• MLAT – DUG JE OKO 4 METRA, OPASNA ZA LJUDE- OČI I NOZDRVE SU ODVOJENE, DAJUĆI JOJ IZGLED ČEKIĆA
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GOBLIN AJKULA
• GOBLIN AJKULA - VEOMA RIJETKA I NAJNEOBIČNIJA AJKULA- BLIJEDA ; RUŽIČASTO-SIVE KOŽE SA DUGOM ISTAKNUTOM NJUŠKOM (NALIKUJE MAČU )- ŽIVI U VEOMA DUBOKOJ VODI
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BIK AJKULA
• BIK AJKULA - OPASNA JE PO LJUDE - MOŽE PLIVATI I U SLANOJ I U SLATKOJ VODI; ČAK JE PRONAĐENA U RIJECI MISISIPI
• DUGA 4-5 METARA
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TIGAR AJKULA
• DUGA PREKO 3 METRA- LOVI UGLAVNOM NOĆU- MAJKA AJKULA IMA DVIJE MATERICE. MNOGE AJKULICE POČINJU RAZVIJANJE U MATERICI ALI SAMO NAJJAČE OSTAJU I U OBE MATERICE POJEDU OSTALE PRIJE NEGO ŠTO SE RODE
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VELIKA ATLANTSKA AJKULA
- DRUGA AJKULA PO VELIČINI (OKO 9 METARA DUŽINE)- TEŽI OKO 4 TONE- FILTRIRA PLANKTON IZ VODE
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KIT AJKULA (KITOPSINA)
- NAJVEĆA AJKULA I NAJVEĆA RIBA- NARASTE I DO 18 METARA A TEŠKA OKO 15 TONA
- HRANI SE PLANKTONOM
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SABLJARKA
• SABLJARKA MOŽE DA PLIVA BRZINOM OD 110 KILOMETARA NA SAT
• SABLJARKA MOŽE DA DOSTIGNE DUŽINU OD 4 METRA I TEŽINU PREKO 350 KILOGRAMA.
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BUCANJ ILI MORSKI MJESEC- PROSJEČNA TEZINA JE 1000 KILOGRAMA
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TUNE
• MOŽE POSTIĆI VELIČINU OD 5 METARA I TEŽINU OD 700 KILOGRAMA
• PLIVA I DO 80 KILOMETARA NA SAT
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SKUŠE
• SKUŠA JE DUŽINE DO 45 CENTIMETARA
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SARDELE
• DUGE SU 25 CENTIMETARA
• HRANE SE PLANKTONOM
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GLAVONOŠCI
• LIGNJE
• OBIČNO SU DUŽINE DO 54 CENTIMETRA
• NEKE SU I 2 METRA DUŽINE
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• NOVI ZELAND - Ribar Jim Anderton kaže da se dobro namučio izvlačeći neman tešku 450 kilograma iz mora. Lokalni mediji prenose da je riječ o lignji dugoj 10 metara, te ističu kako je to prva džinovska lignja uhvaćena neoštećena. No, čini se da uhvaćena životinja neće biti kulinarski doživljaj. Jedan stručnjak tvrdi da će kolutovi ove lignje biti žilavi poput gume s traktora. Ribar Anderton kaže da je njegova ekipa bila u lovu na zubace, kada su primjetili da se divovska lignja uhvatila u mrežu, a ona se inače hrani zubacima. "Lignja je skoro bila mrtva kada smo je dovukli na površinu, pa je rad posade bio je ključan da taj rijetki primjerak očuvamo u dobrom stanju", kaže ribar. Lignja je na brodu zaleđena te otpremljena na Novi Zeland, gdje je sa velikim zanimanjem dočekana.
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VODENI SISARI
• KITOVI
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KITOVI
OD 86 VRSTA KITOVA 14 SU KITOVI USANI A 72 VRSTE KITOVI ZUBANI
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PLAVI KIT
• PLAVI KIT JE NAJVEĆA
ŽIVOTINJA – DUGAČAK JE DO 33 METRA A TEŽAK DO 150 TONA
• PLAVI KIT JE TEŽAK KOLIKO I 30 SLONOVA I DUGAČAK KAO 3 AUTOBUSA
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VODENI SISARI• DELFINI
• PREDSTAVNICI DELFINA U SREDOZEMNOM, MORU SU DOBRI DELFINI,OBIČNI DELFIN I PLAVO-BIJELI DELFIN.
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DELFINI
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MORSKE KORNJAČE
• OD 250 VRSTA KORNJAČA, U MORU ŽIVI 7 VRSTA, U SLATKIM VODAMA 180 VRSTA A OSTALE NA KOPNU
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MORSKE KORNJAČE• SVE MORSKE KORNJAČE POLAŽU
JAJA NA PJEŠČANIM OBALAMA. KORNJAČA POLAŽE 150 DO 200 JAJA U RUPE ISKOPANE U PIJESKU.
• SEDMOPRUGA ŽELVA JE DUGA DO DVA METRA, A MOŽE TEŽITI I DO 350 KG. ZA RAZLIKU OD DRUGIH KORNJAČA NEMAJU TVRDI, KOMPAKTNI OKLOP, VEĆ JE ON KOŽNAT, S MOZAIKOM MALIH KOSTIJU.
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DA PONOVIMO...• PITANJA
1. NABROJ GLAVNE PREDSTAVNIKE NEKTONA.
2. KOLIKO IMA ŠKRŽNIH PROREZA AJKULA?
• ODGOVORI
1. RIBE, KITOVI, DELFINI, MORSKE KORNJAČE
2. 5 PROREZA.
• PITANJA
1. NAVEDI TRI NAJOPASNIJE AJKULE!
2. KOJA JE NAJVEĆA ŽIVOTINJA?
• ODGOVORI
1. BIJELA, MAKO I TIGAR AJKULA.
2. PLAVI KIT.