シラスウナギのガラスウナギの接岸についての観察結果
- Fukudaらによる研究では、飼育下の日本ウナギのガラスウナギの色素沈着は、10〜30°Cの温度範囲で飼育期間とともに進行することが示されている。この観察結果から、本研究で見つかった初期の色素沈着段階のガラスウナギは、集められる直前に相模川河口に到着したものと推察される。
- 現在の漁業規制やガラスウナギの接岸のモニタリングの不足により、日本全国または東アジアの種の分布範囲の広い領域でガラスウナギの接岸の季節変化が起こっているかどうかは分かっていません。
- 相模川河口でのガラスウナギの異常な接岸パターンは、2009年と2010年のシーズンに少なくとも初夏（5月と6月）にピークがあったことが明らかになっています。
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Fukuda et al. [34] showed that the pigmentation of glass eels of the Japanese eel in captivity developed progressively with the duration of rearing in a temperature range of 10~30 °C. This observation suggests that the glass eels at early pigmentation stages found in our study had arrived at the Sagami River estuary not so long before they were collected. Thus. our data clearly show that a quite unusual glass eel recruitment pattern occurred, with the peak in early summer (May and June). at least in the 2009 and 20I0 seasons at the Sagami River estuary. Due to current fishing regulations and the lack of monitoring of glass eel recruitment, it is not known whether a seasonal change in glass eel recruitment has occurred throughout Japan or over a much wider region of their species range in East Asia. Even if this unusual recruitment of glass eels just occurs locally at the Sagami River estuary, it provides information that can be used in determining locally administrated fishing regulations and designing conservation programs for yellow eel stocks (growth phase) fragmentally inhabiting freshwater systems.The monitoring of glass eel recruitment by the Eel River Project is expected to expand to the entire species range of this species. ちなみに、recruitmentは接岸、glass eelはシラスウナギです
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行き係りですから、おまけに。 福田ら（３４）は捕獲飼育された日本鰻のシラスウナギの着色は 温度範囲１０～３０℃中での飼育期間と共に徐々に進行する事を示した。 この観察は、我々の研究で見出された初期着色段階のシラスウナギは、 彼らが捕獲され集められるかなり前にではなく相模川河口に着いた事を提案している。 従って、我々のデータは、相模川では少なくとも2009年と2010年シーズンに付いて、 初夏（五月と六月）にピークを持つ通常とは異なるシラスウナギの接岸パターンが 有った事を明確に示している。 現在の漁業規制とシラスウナギの接岸監視体制の欠如により、シラスウナギ接岸の 季節変化は日本全体で起っていたのか、又は彼らの種集団の東アジアの広い地域で 起きていたかを知る事ができない。このシラスウナギの普通ではない接岸が 相模川河口でのみ局地的に起っていたとしても、それは、地域的に管理された 漁業規制の決定と断片的に淡水系に生息する黄ウナギ（成長期）の資源保存の計画に 使う事のできる情報を提供してくれる。アールリバープロジェクトによるシラスウナギの 接岸監視はこの種の全種集団に拡張される事が期待されている。
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- oignies
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冒頭がわからなないのでわからないのではありませんか これは、福田他著の文献３４によれば、という文章です。あとは辞書引けばある程度わかるでしょう。
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Hatching dates of the glass eels recruited in early summer The age estimation of the glass eels recruited in June 2010 and 2011 revealed that they were born between October and January (Table 3). Accordingly, it is reasonably to suppose that they hatched during the winter and migrated to the Sagami River in early summer. Han I8] re-anulyzed infomiation on the spawning season of A. japonica estimated from otolith increments of glass eels collected over the entire species range. お時間ございましたら回答いただけると助かります
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Although the estimated birth month of most of the glass eels ranged widely from May to December (peak in late August). that of glass eels collected along the Kuroshio (Tanegashima, Kagoshima, Kochi, Wakayama, Shizuoka and Chiba) was relatively limited to being in summer from May to August. Our estimation of birth month for glass eels recruited in early summer to the Sagami River estuary revealed extraordinary late hatching dates ranging from October to January for the 2009-group and November to December for the 2010-group (Table 3). It is possible that the Japanese eels that hatched in the late season occasionally migrated to the Sagami River unexpectedly late during the early summer, but this study is the first to report a glass eel hatched in January from the Japanese Pacific coast along the Kuroshio (Fig. I). Our preliminary otolith examination provides an interesting exception from previous information on the spawning season of the Japanese eel. お時間ございましたら回答いただけると助かります
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Our findings, however showed a considerable recruitment peak in the early summer for two consecutive year classes (2009 and 2010 )-June for the 2009-group (55 % of total amount of glass eels found on the season ) and May and June for the 2010-group (75 %)- with most individuals being in less developed pigmentation stage. わかる方いらっしゃいましたらお願いします!!
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