@article{oai:oacis.repo.nii.ac.jp:00002285, author = {小熊, 進之介 and 丸山, 啓太 and 澤井, 伶 and 中野, 航平 and Kohno, Hiroshi and 河野, 博}, journal = {東京海洋大学研究報告, Journal of the Tokyo University of Marine Science and Technology}, month = {Feb}, note = {2018年4月から2019年11月に千葉県新浜湖において小型地曳網と張網を用いて採集したニクハゼの出現様式,機能発育,および食性を調査し,干潟域におけるニクハゼの初期生活史を明らかにした.本研究では853個体のニクハゼが採集された.発育段階は,遊泳関連形質に基づくと4段階,摂餌関連形質に基づくと3段階に分けられた.消化管内容物調査の結果,体長13 mm未満の個体は浮遊性カイアシ類,体長13.0–23.9 mmでは浮遊性カイアシ類と多毛類,体長24.0 mm以上では様々な動物プランクトンやチチブ属の仔魚を主に摂餌することが明らかになった.また,岸側と沖側で採集されたニクハゼの個体数の違いから,新浜湖の干潟域では仔魚は岸側で成育し,成長に伴って岸側に加えて沖側も利用することが明らかになった.さらに,本種は東京湾内湾の干潟域の中では高塩分環境を好むと考えられた, In order to clarify the early life history of the goby Gymnogobius heptacanthus in a tidal flat, their occurrence patterns, ontogenetic development and food habits were examined on the larvae and juveniles collected using a small seine net and a set net from April 2018 to November 2019 in Shinhama-ko Lagoon, Chiba Prefecture, Japan. A total of 853 specimens were collected. The developmental stage was divided into 4 stages based on swimming-related characters and 3 stages based on feeding-related characters. With the development of the functions, it was revealed that the specimens of 13 mm and smaller feed pelagic copepods, those of 13.0–23.9 mm feed pelagic copepods and polychaetes, and those of 24.0 mm and larger feed various zooplankton and Tridentiger spp. larvae. Based on the difference between the number of specimens collected from the shore and offshore areas, it was considered that the small larvae grew in the tidal flat area of Shinhama-ko Lagoon and the larger larvae and juveniles expanded the distribution area to offshore. In addition, a comparison of the occurrence patterns of the species with other sites in the inner Tokyo Bay revealed that the species would prefer a high salinity environment in the tidal flats of the inner Tokyo Bay, 小熊進之介: 茨城大学地球・地域環境共創機構 水圏環境フィールドステーション, Shinnosuke OGUMA: Water Environmental Field Station, Global and Local Environment Co-creation Institute, Ibaraki University, 丸山啓太・河野博: 東京海洋大学学術研究院海洋環境科学部門, Keita MARUYAMA & Hiroshi KOHNO: Department of Ocean Sciences, Tokyo University of Marine Science and Technology (TUMSAT), 澤井伶: 株式会社 アルファ水工コンサルタンツ, Rei SAWAI: Alpha Hydraulic Engineer Consultants Co., Ltd, 中野航平: 三洋テクノマリン株式会社, Kohei NAKANO: Sanyo Techno Marine, Inc.}, pages = {1--19}, title = {千葉県新浜湖の干潟域におけるニクハゼの初期生活史}, volume = {18}, year = {2022}, yomi = {オグマ, シンノスケ and マルヤマ, ケイタ and サワイ, レイ and ナカノ, コウヘイ and コウノ, ヒロシ} }