Bonito - Euthynnus affinis
Sep 12, 2022
Tso lus
Euthynnus affinis, mackerel tuna, me me tuna, wavyback skipjack tuna, kawakawa, los yog tongkol yog ib hom ntawm ray-finned bony ntses nyob rau hauv tsev neeg Scombridae, los yog mackerel tsev neeg. Nws belongs rau pawg neeg Thunnini, zoo dua lub npe hu ua tunas. Qhov no yog ib hom Indo-Pacific uas pom los ntawm Hiav Txwv Liab mus rau Fabkis Polynesia.
Euthynnus affinis yav tas los hu ua Euthynnus yaito.
- Loj nruab nrab keel nrog 2 me keels ntawm ob sab ntawm caudal peduncle
- 29-34 gill rakers ntawm thawj gill arch
- 8-10 dorsal finlets, 6-8 qhov quav finlets
- Interpelvic txheej txheem 2 flaps
- Cov hniav me me thiab conical nyob rau hauv ib series
- Tus nplaig nrog 2 longitudinal ridges
- Narrow interdorsal qhov chaw tsis dav dua qhov muag
- Lub cev scaleless qab ib tug corselet ntawm loj, thickened nplai
Bluish dub saum toj, nyiaj hauv qab. Scaleless corselet cheeb tsam uas muaj ib tug series ntawm oblique tsaus kab txaij tom qab ib nrab-thawj dorsal fin. Feem ntau 1-3 qhov tsaus me me ntawm pectoral thiab pelvic-fin bases.
Txog li 100 cm TL, thiab mus txog 14 kg hauv qhov hnyav.
Cov dej sov ntawm Indo-West Pacific, suav nrog cov Islands tuaj dej hiav txwv thiab archipelagos.
Inshore pelagic, pom ntawm qhov tob ntawm qhov chaw mus txog 50 m.
Feem ntau noj ntses me me, tshwj xeeb tshaj yog clupeids thiab atherinids, tab sis kuj squids, crustaceans thiab zooplankton. Daim ntawv loj cais tib hom thiab ntau hom tsev kawm ntawv. Kev loj hlob ntawm Euthynnus affinis sib txawv los ntawm cheeb tsam, tawm ntawm ntug dej hiav txwv ntawm Is Nrias teb, qhov ntev ntawm 50 feem pua ntawm cov tib neeg yog cov neeg laus yog kwv yees li ntawm 49 cm FL thiab 49.7 cm FL rau cov poj niam thiab cov txiv neej feem. Nyob rau hauv dej tawm ntawm Taiwan, lub hnub nyoog ntawm thawj loj hlob yog kwv yees li ntawm 2 xyoo. Euthynnus affinis tsiv mus rau cov dej tawm ntawm ntug dej hiav txwv ntawm Taiwan, sab qaum teb ntawm Philippines rau spawning. Lub caij Spawning tshwm sim txij lub Plaub Hlis mus txog Lub Yim Hli, nce siab thaum Lub Xya Hli. Lub hnub nyoog siab tshaj plaws yog kwv yees li ntawm 9 xyoo.