Kukwira Kwetembiricha Yegungwa Kuri Kumanikidza Mhando dzeHove dzeJapan Kuchinja

Table of Links

• Abstract uye 1 Sumo
• 2 Zvishandiso & Nzira
• 3 Migumisiro
• 4 Kukurukurirana
• Kupokana kweKufarira, Mipiro yeVanyori, Mari, Kutenda, Kuwanikwa kwedata
• Reference
• 5 Supplementary Tables uye Figures

Abstract

Sardine yeJapan ( Sardinops melanostictus ) ihove diki yepelagic inowanikwa muGungwa reJapan, gungwa rekumavirira kumadokero kweNorth Pacific. Imhando yakakosha yehove dzematunhu, asi mafambiro adzo uye mafambiro ekufamba panguva dzehupenyu hwekutanga zvinoramba zvisina kujeka. Muchidzidzo ichi, takaongorora iyo yakagadzikana oksijeni isotope ratios yeotoliths yevechidiki-ye-gore (zera 0) Japanese sardines yakaunganidzwa kubva kuchamhembe kwemahombekombe uye kumaodzanyemba kwemahombekombe eGungwa reJapan muna 2015 uye 2016. The ontogenetic shifts of kugoverwa kwenzvimbo kwakafungidzirwa nekuenzanisa maprofiles ehupenyu-refu isotope ratios uye yenguva inosiyana isoscape, iyo yakaverengerwa pachishandiswa tembiricha uye salinity minda inogadzirwa negungwa data assimilation modhi. Vanhu vakaunganidzwa munzvimbo dzekuchamhembe nekumaodzanyemba vakachochonya ndokugara munzvimbo dzekumaodzanyemba (kumadokero kumahombekombe kweKyushu) kusvika pakupera kwaChikumi, uye mushure mezvo, vanogona kusiyaniswa mumapoka maviri: rimwe rakatamira kuchamhembe pakadzika uye rimwe rakagara rakatenderedza. nzvimbo yekumaodzanyemba munzvimbo yakadzika. Kuenzanisa kwesomatic kukura trajectories yemapoka maviri aya, iyo yakavakwa patsva zvichienderana neotolith microstructure ongororo, yakaratidza kuti vanhu vakatamira kuchamhembe vaive nehurefu hwemuviri hwakakura mukupera kwaChikumi pane avo vakagara munharaunda yekumaodzanyemba. Mhedzisiro iyi inoratidza kuti ma sardine echiJapan madiki akachochonya munzvimbo yekumaodzanyemba anogona kunge akamanikidzwa kusarudza imwe yenzira mbiri kudzivirira kupisa kwakanyanya kwemvura mukati memwaka uye nenzvimbo. Izvi zvinosanganisira kutamira kuchamhembe kana kutamira kune dzakadzika zvidimbu. Mhedzisiro yedu inoratidza kuti kusiyanisa kwezvakatipoteredza munharaunda yekumaodzanyemba kunogona kukanganisa zvakanyanya kusarudzika kwesardine muGungwa reJapan.

1 Nhanganyaya

Sardine yekuJapan ( Sardinops melanostictus ) imhando ine kushanduka kukuru kwebiomass. Kuwanda kwema sardine echiJapan kwakaratidza kushanduka kwakakura kwemaodha akati wandei mukati memakore ekupedzisira e3000 (Kuwae et al., 2017), uye shanduko yakataurwawo maererano nekubata hove kwakabatana mumazana emakore apfuura (Yasuda et al., 2019). Kuchinja uku kunoonekwa sekufambiswa nekusiyana kwezvakatipoteredza, izvo zvinowanzomiririrwa nePacific Decadal Oscillation (semuenzaniso, Chavez et al., 2003). Kujekeswa kwehukama hwemagetsi pakati pemamiriro ekunze nemhoteredzo dzemugungwa uye kuchinjika kwehuwandu kwakakosha kuitira kufanotaura chaiko kwekuwanda kwezviwanikwa uye kutonga kwehove. Misiyano yehuwandu hwekupona panguva yemashure-e-hatching larval uye pwere nhanho inofungidzirwa kuve yakakosha kwazvo mukushanduka kwevanhu (semuenzaniso, Hjort, 1914). Naizvozvo, ruzivo rwekugoverwa kwenzvimbo uye nharaunda yemasadhini eJapan panguva dzehupenyu hwayo hwakakosha hwakakosha kuratidza kukanganiswa kwemamiriro ekunze uye shanduko yemugungwa pakuchinja kwehuwandu.

Ikozvino manejimendi ehove yeJapan sardine anotora maviri manejimendi kana masheya - Pacific stock (yakagoverwa kumadokero kweNorth Pacific) uye Tsushima Inodziya Yazvino Stock (yakagoverwa muGungwa reJapan), ese ari maviri anoratidza kuchinja kukuru mukuwanda kwakafanana. zvikero zvenguva. Nepo mapatani ekufambisa uye kutama panguva yehupenyu hwekutanga nhanho dzakataurwa kuPacific stock (semuenzaniso, Okunishi et al., 2009; Sakamoto et al., 2019), ruzivo rwakadai rweTsushima Warm Current Stock haruna kukwana. Kubereka kweTsushima Warm Current Stock kunoitika munzvimbo dzemahombekombe kubva kumadokero kweKyushu kusvika kuNoto Peninsula kubva munguva yechando kusvika kutanga kwezhizha (Ndira-Chikumi, Fig. 1). Iyo huru yekuberekesa ivhu inoshanduka zvichienderana nekupisa kwepasi pegungwa uye kubereka stock biomass (Furuichi et al., 2020). Iyo yechidiki-ye-ye-gore yeJapan sardine inowanikwa zvakanyanya kubva kuNoto Peninsula kuenda kumhenderekedzo yekumadokero kweKyushu mukupera kwezhizha (Ito, 1961; Yasuda et al., 2021). Ongororo ichangoburwa yakaratidza kuti nharaunda yekuchamhembe kwemahombekombe kweGungwa reJapan ine hombe uye lipid-rine hupfumi nyama zooplankton inokodzera kutora simba kwesardine pwere (Yasuda et al., 2021). Mukuwedzera, kugoverwa kwemari kunozivikanwa kuwedzera uye kuderera mukupindura kushanduka kwevanhu; panguva dzekuwedzera biomass, kugoverwa kwenzvimbo yemasheya kunowedzera kunzvimbo yekuchamhembe kwegungwa reGungwa reJapan (Muko et al., 2018). Aya maonero anotungamira kune fungidziro yekuti kutevedzana uye kwakabudirira kufambisa (kana kutama) kwevadiki kuenda kuchamhembe kwemahombekombe kwemahombekombe kunogona kunge kuri mutyairi wekuwedzera kwestock (Muko et al., 2018; Yasuda et al., 2021). Nekudaro, mabviro, mafambisirwo, uye nzira dzekutama kwevanhu vanosvika kuchamhembe kwemahombekombe eGungwa reJapan hazvisati zvajekeswa. Kunzwisisa mafambiro ekufamba uye akasiyana-siyana, uye nzira dzinogadzira zvakasiyana-siyana zvinogona, saka, kupa ruzivo rwemaitiro ekutora simba, huwandu hwevanhu, uye pakupedzisira kutonga kwesardine munharaunda.

2 Zvishandiso & Nzira

2.1 Hove sampling uye Otolith δ 18 O kuongorora

Iwo madiki-e-e-makore emasardine eJapan akaunganidzwa kuti aongorore otolith munzvimbo nhatu dzesampling (kubva kuNoto Peninsula, Tsushima Strait, uye kubva kuGoto Islands) muGungwa reJapan kubva Nyamavhuvhu kusvika Gunyana muna 2015 uye 2016 neR/ V Yoko-maru, Japan Fisheries Research and Education Agency (Fig. 1; Tafura 1). Hove dzakaomeswa nechando pakarepo mushure mekubatwa uye dzakachengetedzwa mu -80 kana -20 °C. Mushure mezvo, zvienzaniso zvakanyungudutswa murabhoritari yepanyika uye urefu hwemuviri wavo (BL) nehuremu hwemuviri zvakayerwa. Sagittal otoliths yakabudiswa, yakacheneswa nebhurashi, yakashambidzwa ne ethanol uye mvura yakasvibiswa, uye yakaomeswa pakupisa kwemaawa kwemaawa akawanda. Maotoliths akaomeswa akaiswa mu epoxy resin (p-resin, Nichika Inc.) pane slide yegirazi, ndokuzoiswa muomesi pa40 ° C kweinenge zuva rekugadzirisa otoliths. Pashure pacho, maotoliths akaiswa akakwenenzverwa nejecha (No. 1000, 2000) kusvikira musimboti we otolith waiswa pachena kubva kune epoxy resin, uye ipapo otolith yose yakasvibiswa nealuminium suspension (BAIKOWSKI International Corporation) kuti ave nechokwadi chokuti zvindori zvezuva nezuva zvinogona kuva. zvinoonekwa zviri nyore pasi pemaikorosikopu. Nhamba yezvindori zvezuva nezuva zveotolith uye otolith zuva rega rega increment widths yakayerwa uchishandisa otolith measurement system (RATOC System Engineering Co. Ltd.). Iwo maotoliths e154 vanhu kubva pazviteshi gumi nemasere akashandiswa kuyera mhete yemazuva ese (Table 1).

2.3 Kuyerwa kwenhoroondo yekutama

Kusimbisa mhedzisiro inofungidzirwa, inofungidzirwa nzvimbo yekugovera pazuva iri pedyo nesampling date yemunhu wega wega yakaenzaniswa nenzvimbo chaiyo yesampling. Pamusoro pezvo, iyo inofungidzirwa nzvimbo yekugovera pazuva iri padhuze nezuva rekuchechenya yakaenzaniswa nemhedzisiro yemwedzi nemwedzi zai uye ongororo yegonyeti yakaitwa kunzvimbo dzeprefectural fisheries field stations (Oozeki et al., 2007; Furuichi et al., 2020).

2.4 Kuongorora kwenhamba

Kuongorora mutsauko wehunhu hwebhayoloji pakati dzingangove dzakasiyana siyana dzinotama, dzinoti boka rekuenda kuchamhembe (kubva kuNoto Peninsula vanhu) neboka rekugara (Tsushima Strait nekubva kuGoto Islands vanhu; ona Mhedzisiro uye Hurukuro), takaenzanisa somatic kukura trajectories pakati pemapoka aya. . Iyo Mann-Whitney U bvunzo yekuenzanisa yehatching date uye BL panguva yesampling yakaitwa pakati pemapoka. Isu takafananidzawo iyo BL tisati tasampling. BL nguva yesampling isati yasvika yakaverengerwa pachishandiswa nzira yebiological intercept, tichitora hukama hwemutsara pakati peotolith radius neBL ine yakatarwa 5.9 mm yeBL pakuiswa kwekutanga kuwedzera kweotolith, ichitevera Takahashi et al. (2008). Kuti uedze misiyano yekukura kwemazuva ese pakati pemapoka, anomalies yemazuva matatu ekumhanya-kureva otolith increment upamhi yakajairwa nekutsauka kwakajairwa kwakaenzaniswa pakati penzvimbo nhatu dzesampling uchishandisa bvunzo yeKruskal-Wallis. Iwo anomalies akaverengerwa nenzira mbiri: yezuva rega rega zera rehove uye yezuva rega rega rekarenda (mazuva kubva muna Ndira 1 gore rega rega). Apo mutsauko mukuru wakaonekwa, post-hoc Steel-Dwass test yakaitwa kuti ione nzvimbo dzine misiyano yakakura.

3 Migumisiro

3.4 Kuenzanisa kwemazuva ekucheka, BL uye misiyano yekukura kwemazuva ese

Paive nemusiyano wakakura pamazuva ekubira pakati peboka rekuenda kuchamhembe (63 ± 32 mazuva kubva Ndira 1; zvinoreva ± 1SD) neboka rekugara (43 ± 30 mazuva kubva Ndira 1st) (Tafura 2, p <0.02, Mann- Whitney U bvunzo). The meant BL yeboka rekuchamhembe yaive 136.7 ± 6.4 mm uye iyo yeboka rekugara yaive 118.9 ± 9.4 mm. Iyo BL yeboka rekuchamhembe raive rakakura zvakanyanya kupfuura iro reboka rekugara (Table 2, p <0.001, Mann-Whitney U test). Muchirimo (March-May), zvinoreva shure-yakaverengwa BL yeboka rekugara yakanga yakakura kudarika yeboka rekuchamhembe rinotama (Fig. 6). Zvakadaro, kubva muna Chikumi, iyo BL yakaverengerwa kumashure-yakaverengerwa yeboka rekuenda kuchamhembe yaive yakakwira kupfuura yeboka revagari. Izvo zvinoreva BL paChikunguru 1st, iyo inoenderana nenguva iyo maitiro ekufambisa akatanga kutsauka, aive akakura zvakanyanya muboka rekuenda kuchamhembe (kutamira kuchamhembe: 104.8 ± 14.4 mm, mugari: 95.1 ± 14.8 mm, Mann-Whitney U bvunzo, p <0.01, Tafura 2). Kana ichienzaniswa nezera remazuva ese, kutsauka kwakajairwa kwekukura kwemazuva ese pakati penzvimbo nhatu dzesampling kwakasiyana zvakanyanya panguva ye56-147 (kunze kwe69, 76-78, uye 140) zera rezuva nezuva (p <0.05, Kruskal-Wallis bvunzo) . Pakati peNoto Peninsula uye kubva kuGoto Islands vanhu, iyo post-hoc Steel-Dwass bvunzo yakaratidza kuti kutsauka kwakajairwa kwekukura kwemazuva ese kwakasiyana zvakanyanya panguva ye56-103 (kunze kwe69, 76-78, 89, uye 97- 98) zera rezuva nezuva (Fig. 7, p <0.05). Pakati peNoto Peninsula uye Tsushima Strait vanhu, kutsauka kwaive kwakasiyana zvakanyanya pakati pe71-75, 79-86, 88-139, uye 141-147 zera rezuva nezuva (Fig. 7, p <0.05) , kana nguva dzakaratidza kukosha kupfuura mazuva mashanu anotevedzana. Kana ichienzaniswa nemazuva ekarenda, pakanga paine musiyano wakakura pakati pemapoka panguva ye113-206 (kunze kwe120, 152-157, 170 uye 192-193) mazuva kubva muna Ndira 1 (kupera kwaApril kusvika pakupera kwaChikunguru) (p <0.05, Kruskal -Wallis bvunzo). Mhedzisiro yemubvunzo wePost-hoc Steel-Dwass yakaratidza kuti kutsauka kwakajairwa kwekukura kwemazuva ese kweTsushima Strait uye kubva kuGoto Islands vanhu vaive vakasiyana zvakanyanya neavo veNoto Peninsula vanhu mukati memazuva 114-118 (kupera kwaKubvumbi) uye 185– 191 (kutanga kwaJuly) uye 194-206 mazuva (pakati paJuly kusvika pakupera kwaJuly) (Fig. 7, p < 0.05), zvichitevedzana, kana nguva dzakaratidza kukosha kupfuura mazuva mashanu akatevedzana.

4 Kukurukurirana

Kuenda kuchamhembe uye mapoka evagari vakaratidza kusiyana kukuru mukukura kwenzira. Izvo zvinoreva BL muchirimo (March-May) yakanga yakakura muboka rekugara (Fig. 6). Izvi zvingangodaro nekuti zuva rekuti hatch yeboka revagari raive rapfuura pane iro reboka rekuenda kuchamhembe (Tafura 2). Hapana misiyano mukukura kwekukura kwakaonekwa pakati peboka rekugara neboka rekuenda kuchamhembe kusvika kumazuva makumi mashanu mushure mekucheka (Fig. 7). Zvakadaro, boka rekuenda kuchamhembe rakakura nekukurumidza mazuva makumi mashanu mushure mekuchechenywa kupfuura boka revagari, uye rakave rakakura muna Chikumi, kunyangwe nekukura kwavo kudiki muchirimo (Kurume-Chivabvu). Izvi zvinoratidza kuti vanhu vanokura zvakanaka munguva yekupedzisira kwechirimo uye kutanga kwezhizha mukati mehuwandu vakatamira kuchamhembe.

Maitiro ekutama anosanganisira vese vanotama uye vanogara vanhu vanonzi kutama kwechidimbu, kunoonekwa mumhuka dzakasiyana siyana, kusanganisira hove (Chapman et al., 2011, 2012). Kune marudzi matatu emwaka wekufamba-famba kwemarudzi ehove (Chapman et al., 2012). Yekutanga haisi yekuberekesa kutama kwechikamu, umo vanotama uye vagari vanoberekesa tsitsi, asi vanopedza mwaka usiri wekubereka zvakasiyana. Rudzi rwechipiri nderwekutama kwemombe kusingaenzaniswi, umo vanotama nevagari vemo vanogovana nzvimbo isingabereke asi vanoberekesa vakaparadzana. Yechitatu inoregwa kubereka kutama kwechikamu, umo vanotama uye vagari vanogovana nzvimbo isiri-yekuberekesa, uye vanhu vanotama kunobereka, asi kwete gore rega rega, zvichiita kuti vatame zvishoma. Pamusoro pemhando nhatu dziri pamusoro apa dzekutama kwechikamu, kupfupika kwespatio-temporal partial migration kunoonekwa: partial diel vertical migration, umo vanotama vanofamba vakamira masikati kana husiku apo vagari vanoramba vari pakadzika kumwechete (zvimwe zvakawanda ona Chapman et al. ., 2012). Mumhuri yesardine yeJapan, Clupea harengus inoratidza hunhu hwekuberekesa vanoenda kune dzimwe nyika - vanogovana imwe nzvimbo yekudyisa asi vanotamira kunzvimbo dzakasiyana kunobereka muNorth Sea (Ruzzante et al., 2006). Zvizvarwa zve Celtic Sea zve C. harengus zvinotama mu Irish Sea kunobereka; ava vanotama vanokura zvishoma nezvishoma kupfuura vagari uye saka vanotorwa gare gare kune vanhu vakuru (Burke et al., 2008). Zvinowanzoonekwa kuti hukuru hwemuviri hwevanotama uye vagari vanosiyana mumhuka dzinofamba zvishoma (semuenzaniso, Kerr et al., 2009). Mafungiro akasiyana-siyana akatsanangurwa maererano nezvinhu zvinoita kuti pave nekusiyana kwehukuru (Chapman et al., 2011). Iyo yechinyakare "saizi yemuviri" hypothesis inotaura kuti hukuru hwemuviri hunobatsira kune vagari nekuda kwekushivirira kwavo kwemuviri kune yakaipa mamiriro echando (Ketterson naNolan, 1976). Zvisinei, kunze kweiyi fungidziro zvinosanganisira shiri, umo kutama kwechikamu kwakadzidzwa zvakanaka. Vanhu vakuru vemurume mukuru bustard Otis tarda vakaratidzwa kuti vanotama mukati memwedzi inopisa yezhizha; izvi zvave zvichinzi kune kushivirira kwakadzika kwekushisa kwepamusoro kwevanhu vakuru kana vachienzaniswa nediki (Alonso et al., 2009). Pamusoro pezvo, vanhu vakakura veshiri dzinopisa, dzine simba rakawanda, dzinowanzotama (Jahn et al., 2010). Mukati me skipjack tuna (Katsuwonus pelamis) yakamaka uye yakaburitswa kubva panzvimbo imwe chete kumadokero kweNorth Pacific, zvikamu zvepamusoro zvevanhu vakuru (46 cm kana kupfuura) zvakaunganidzwa munzvimbo dzakakwirira pane vadiki (44 cm kana diki) vanhu (Nihira, 1996) . Uye zvakare, kuchamhembe kwakadziva skipjack tuna yaive nepamusoro pesimba rekushandisa pane iro riri pazasi latitudes (Aoki et al., 2017). Izvi zvakawanikwa zvinoratidza kuti simba repamusoro rinodiwa nevanhu vakakura rinokurudzira kutama, kunyangwe kumarudzi ehove. Saizvozvo, muchiitiko cheJapan sardine muGungwa reJapan, vanhu vakuru vanogona kutama kuti vawane simba rakawanda nekuda kwekuwedzera kwekushisa kwepasi pegungwa kwakatenderedza Kyushu.

Mvura tembiricha pakadzika 10 m uye 30 m kumadokero offshore Kyushu akanga akafanana kubva February kusvika June (Fig. 8). Mushure meJune, zvisinei, kuwedzera kwekushisa kwemvura pa 10 m kudzika kwakakurumidza, uye pakanga pane mutsauko pakati pekushisa kwemvura pakadzika kwema 10 m uye 30 m nekuda kwekuvandudzwa kwe stratification. Kunyanya kupisa kwekushisa kunoguma nekuwedzera simba rekuparara uye kuda simba rakawanda rekudya nekushandisa (Rudstam, 1988; Ito et al., 2013). Sardine yekuJapan ingadai yakadzivisa izvi nekusarudza imwe yenzira mbiri dzinotevera: kutamira kuchamhembe kwakadzika kusina kudzika kana kuva nekwakadzika kwekugara uye kugara munzvimbo imwe chete. Vanhu vane kukura kuri nani uye hukuru hwemuviri hukuru hwaizove nepamusoro pesimba rekuda (Noguchi et al., 1990). Zvichakadaro, kuwanda kwe zooplankton muGungwa rekumadokero kweJapan kunoderera zvishoma nezvishoma kubva muchirimo kusvika muzhizha (Hirakawa et al., 1995); uye zooplankton kuwanda uye simba riri kuchamhembe kweGungwa reJapan rakakwirira kupfuura iro riri kumadokero kweGungwa reJapan mumwedzi yezhizha (Yasuda et al., 2021). Sardine yeJapan kuchamhembe kwemahombekombe nzvimbo yaive nehukuru hukuru uye yakakwira lipid zviri mukati (Yasuda et al., 2021). Sardine dzeJapan dzakakwanisa kubudirira kusvika kunzvimbo yekuchamhembe kwemahombekombe vakapihwa mubairo wenzvimbo iri nani. Saka, vanhu vakuru vaida zvokudya zvakawanda vanogona kunge vakatamira kuchamhembe kuti varambe vari munzvimbo ine tembiricha yemvura uye vachitsvaka nzvimbo dzine zvokudya zvakawanda. Sezvo kutama kwechidimbu kwaiperekedzwa nekudzika kwekugara kwakasiyana, nyaya iyi inogona kutorwa semusanganiswa wekusabereka kutama kwechidimbu uye kutama kwakatwasuka kune vakakura vanotama.

Mukupedzisa, takaratidza kutama mumatanho ekutanga ehupenyu hwevadiki-we-the-year Japanese sardine muGungwa reJapan muna 2015 uye 2016. Vose vakachechenya uye vakakurira kumadokero kwemahombekombe eKyushu kusvika pakupera kwaJune, uye vangave vakasarudza imwe. yemaitiro maviri ekudzivirira kupisa kwakanyanya mukati memwaka uye yenzvimbo: kutamira kuchamhembe kana kudzika kwakadzika. Vanhu vakakura zvakanaka muzhizha vaiwanzotamira kuchamhembe kunzvimbo dzekudyisa zviri nani, zvichireva kuti mamiriro ezvakatipoteredza mukuberekesa uye nzvimbo dzekurera kumadokero kwemahombekombe eKyushu angave akakosha pakuwana simba rose mukati megore rekutanga rehupenyu. Mune ramangwana, zvichave zvakakodzera kujekesa zvinhu zvinodzora kukura kwevanhu kumadokero kweKyushu. Pamusoro pezvo, kumwe kuongorora kwehuwandu hwevanhu kwakakosha kuongorora mupiro wevanhu kubva munzvimbo dzekuberekera muGungwa reJapan kuenda kuTsushima Warm Current Stock.

Kupokana Kwekufarira

Vese vanyori havana kupesana kwechido.

Munyori Mipiro

Funding

Chidzidzo ichi chakatsigirwa nerubatsiro kubva kuFisheries Agency yekuJapan, Kurita Water and Environment Foundation, uye JSPS KAKENHI (16H02944, 18H04921, 19H04247, 21H04735, 21K18653, uye 22H05030).

Kutenda

Ichi chigadziro chinofanira kuendeswa kujenari. Mushure mekugamuchirwa kwechinyorwa ichi, chinongedzo chekuburitswa chichaitwa mune iyi preprint. Tinoratidza kutenda kwakakosha kuna Dr. Akira Hayashi nekupa otolith zuva nezuva ring data data. Tinotenda S. Sakai neruzivo rwehunyanzvi nezve micromilling uye J. Ibuki naS. Namekawa nerutsigiro rwehunyanzvi nekuongorora isotopic. T. Setou akapa hydrodynamic modhi zvabuda. Vanyori vanobvuma T. Goto, Y. Ishihara, T. Kodama, H. Kurota, naN. Nanjo nokuda kwerubatsiro rwavo nesampling yemvura yegungwa.

Kuwanikwa kweData

Mipiro yepakutanga yakaratidzwa muchidzidzo ichi inowanikwa pachena kune otolith microchemistry analysis. Iyo data ichawanikwa pano mushure mekugamuchirwa kwechinyorwa ichi: doi: 10.6084/m9.figshare.25241842. Imwe data inotsigira mhedziso dzechinyorwa ichi ichaitwa kuti iwanikwe nevanyori, pasina kuchengetedzwa zvisina kufanira.

Reference

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Matafura

Supplementary Material

5 Supplementary Tables uye Figures

5.1 Supplementary Tables

TAFURA S1. Pfupiso yemhedzisiro yekuongorora kune vanhu vese vakaongororwa kugadzikana isotopu kuongororwa. Iyo data ichave iripo kubva kudoi: 10.6084/m9.figshare.25241842 mushure mekunge chinyorwa ichi chagamuchirwa.

5.2 Supplementary Figures

Supplementary video 1. Muenzaniso weotolith milling process mune yegore rekare yeJapan sardine yakaunganidzwa muGungwa reJapan. Nhambwe kubva pakati kusvika kumucheto kweotolith iyi yaive 1428 μm. Uyu hausiwo muenzaniso wakashandiswa muchidzidzo chino, asi unoratidzwa pano semuenzaniso. Tinya kaviri pamufananidzo kuti uritambe.