Global iqlim o’zgarishlari sharoitida suv havzalardagi baliqlarning hozirgi holati
Yüklə 0,54 Mb. Pdf görüntüsü
|
- Bu səhifədəki naviqasiya:
- Annotatsiya
- Kalit so’zlar
|
Global iqlim o’zgarishlari sharoitida suv havzalardagi baliqlarning hozirgi holati Sarvinoz Farxodovna Salimova sarvinoz8915@gmail.com Hilola Umarqulovna Murodova murodovah2021@gmail.com Buxoro davlat universiteti Annotatsiya: Baliqlarni barcha suv havzalarida uchratish mumkin. Masalan ko‘llarda, daryolarda, dengizlarda, okeanlarda, suv havzalarida. Bugungi kundagi, hisob-kitoblarga ko‘ra, dunyo bo‘ylab 32000 dan ortiq turli baliq turlari mavjud. Baliqlar orasidagi ularning kattaliklari turlicha bo’ladi. Xususan, eng kichik Kiprinid baliqning uzunligi atigi 7 santimertni tashkil qiladi, eng yiriklari esa Kit akulasi 9 metrdan ortiq uzunlikdagi dunyodagi eng katta baliqlardan biridir. Insonlar tomonidan ovlagan baliqlar miqdori juda hayratlanarli ahvoldadir. Masalan, 2021 yilda taxminan 110 million tonna baliq ovlangan. Odamlarning haddan tashqari baliq ovlashi va dengiz ekotizimini beqarorlashtirishi tobora oydinlashmoqda. O'tgan asrda akulalar kabi yirtqich baliqlar populyatsiyasining uchdan ikki qismidan ko'prog'i ham kamaydi. Umuman olganda, qaysi dengizda bo'lishidan qat'iy nazar, ham biologik xilma-xillik, ham ko'plik kamaygan ekotizim kuzatilmoqda. Kalit so’zlar: Kiprinid, Kit akulasi, ekotizim, oziq moddalar, marjon riflari Current status of fish in water bases in global climate changes Sarvinoz Farkhodovna Salimova sarvinoz8915@gmail.com Hilola Umarqulovna Murodova murodovah2021@gmail.com Bukhara State University Abstract: Fish can be found in all bodies of water: lakes, rivers, seas, oceans, ponds. Today, there are an estimated 32,000 different fish species worldwide. There are fish by size. In particular, the smallest Cyprinid fish is only 7 centimeters long, while the largest, the Whale shark, is one of the largest fish in the world, more than 9 meters long. The amount of fish caught by humans is astonishing, with about 110 million tons of fish caught in 2021. It is becoming increasingly clear that people are overfishing and destabilizing the marine ecosystem. Over the past century, more than "Science and Education" Scientific Journal / ISSN 2181-0842 May 2022 / Volume 3 Issue 5 www.openscience.uz 174 two-thirds of the population of wild fish, such as sharks, has declined. In general, regardless of which sea it is in, both biodiversity and abundance are observed. Yüklə 0,54 Mb. Dostları ilə paylaş:
|