The tows produced within Stn. cuatro to review eggs depth delivery on the survey collected 21 eggs in two depth levels (150, 180 meters), but no egg have been stuck from the tows during the layers over and below (60, 120, 250, 420 m) as revealed in Shape 5. Brand new layer off eggs collection try on top of the thermocline in the heart of high salinity water and simply underneath the chlorophyll restriction, most abundant in eggs becoming caught on 150 meters coating.
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This research built-up one another eggs and you may preleptocephali across the West pling surveys which were timed with regards to the fresh new moon episodes out-of . The latest egg was in fact discovered prior to the brand new moonlight on about three other latitudes along the ridge, and therefore corresponded to the metropolitan areas of your salinity front or becoming from inside the latitudinal the total amount of the lowest salinity surface water. Egg catches south of your own good salinity front side into the was similar to the hypothesis that salinity front side impacts new latitude out-of spawning , , . This indicates one to spawning eels have focused on that one city to form spawning aggregations. The first selections out of Japanese eel eggs inside the was in fact plus into the a comparable area merely southern area out-of a salinity side, with no preleptocephali are collected during the programs towards northern of the leading . Studies during the past age have discovered zero evidence of spawning with the the eastern area of the ridge , that’s the reason there are no channels there with this data.
However, there were zero clear salinity fronts throughout the a couple of 2012 studies and in some early in the day education , , so that the eels need both need certainly to decide where you should form spawning aggregations instead of a definite salinity side just like the a land regarding this study, eggs had been accumulated from inside the latitudinal directory of the low salinity body water while the catch locations regarding preleptocephali recommended one spawning had along with happened at the numerous latitudes. (далее…)