Vietnamese eels and japanese eels pdf

32 259 0
Vietnamese eels and japanese eels pdf

Đang tải... (xem toàn văn)

Tài liệu hạn chế xem trước, để xem đầy đủ mời bạn chọn Tải xuống

Thông tin tài liệu

Translated by Ichiro Hayashi Written by Atsushi Asui Presenters: Quân, Ngọc, Thuật, Trâm, Vân MAIN PARTS General knowledge about Species of eels Differences of Vietnamese eels and Japanese eels Life style of Japanese eels COMMON KNOWLEDGE Quantities Common knowledge Living places Characteristics COMMON KNOWLEDGE 600 species Quantities 12 families COMMON KNOWLEDGE Quantities Common knowledge Living places Characteristics COMMON KNOWLEDGE Freshwater (fry and young fish) Seawater (adult) Living places COMMON KNOWLEDGE Quantities Common knowledge Living places Characteristics COMMON KNOWLEDGE Hermaphrodite (lưỡng tính) Without scale smooth skin Breathing through abdominal cavity Characteristics SCIENTIFIC CLASSIFICATION Japanese eel Vietnamese eel Kingdom Animalia Kingdom Phylum Chordata Phylum Class (lớp) Actinopterygii Class (lớp) Order (bộ) Anguiliformes Order (bộ) Family (họ) Anguilidae Genus (chi) Angulia Species (loài) Japonica Binomial Anguilla name (tên japonica ghép) (giới) (ngành) Family (họ) Genus (chi) Species (loài) Binomial name (tên ghép) Animalia (giới) Chordata (ngành) Actinopterygii Synbranchiformes Synbranchidae Monopterus M Albus Monopterus Albus MAIN PARTS General knowledge about Species of eels Differences of Vietnamese eels and Japanese eels Life style of Japanese eels December – April, entering river from sea GLASS EEL (lươn kính) About cm long and transparent Water temperature: – 10oC Have strong instinct to swim against any water current Active at night After some weeks, glass eel becomes black in colour Places: rivers, ponds, streams all over countryside ELVER (lươn con) Summer temperature: 25-32oC Food: insects, worms Length: 15cm After some two weeks, elver becomes brownish yellow Live: 5-10 years in wild Brownstage eel (lươn nâu) Length: 30 cm The sexual organs can be distinguished The eels reach adult size Eels go out to the distant ocean spawning grounds Spawning -season (mùa sinh sản) A great amount oil are stored and they stop feeding A metallic silvery colour develops under the skin of the eel giving the belly a silvery white appearance On dark autumn nights, the eels migrate down the river into the sea REFERENCES SUMMARY VIETNAMESE EELS AND JAPANESE EELS VIETNAMESE EELS AND JAPANESE EELS LEAD TO COMMON KNOWLEDGE COMPARISION LIFE HISTORY SUMMARY GLASS EEL ELVER BROWNSTAGE EEL STAGES OF EELS SILVER EEL  •      Male:  70 grams weight  35 cm long ADULT SIZE Female:  300-350 grams weight  57-60 cm long  ... Species of eels Differences of Vietnamese eels and Japanese eels Life style of Japanese eels LIFE CYCLE OF EELS LIFE CYCLE OF EELS LIFE CYCLE OF EELS LIFE CYCLE OF EELS LIFE CYCLE OF EELS December... appearance On dark autumn nights, the eels migrate down the river into the sea REFERENCES SUMMARY VIETNAMESE EELS AND JAPANESE EELS VIETNAMESE EELS AND JAPANESE EELS LEAD TO COMMON KNOWLEDGE COMPARISION... Species of eels Differences of Vietnamese eels and Japanese eels Life style of Japanese eels COMPARISION Name Fluta alba A.japonica Characters Size (cm) Weight (gram) Spawning season Land distribution

Ngày đăng: 09/07/2014, 22:21

Tài liệu cùng người dùng

Tài liệu liên quan