2種のカレイ科魚類, アブラガレイAtheresthes evermanni とReinhardtius hippoglossoides の変態期仔魚について形態的特徴を記載した.変態が完了する体長はアブラガレイが約35mm, が約50mmと推定され, いずれの種もカレイ科では最大クラスに属する.

抄録全体を表示

A specimen of Anarrhichas orientalis Pallas was caught by he long line on July 16, 1969 frorn Miyako Bay, Japan.In Japan, this species has hitherto been recorded from only the coast of Hokkaido, accordingly, the present record is thought to be the southermmost distribution in Japan.The specimen was 84cm in total length.

抄録全体を表示

The existence of acid, neutral, and alkaline proteinases in fish muscle was examined. The species used were common mackerel, sardine, horse mackerel, white croaker, lizardfish, and deep-sea fish such as black halibut, soft eelpout, pectral rattail, and threadfin hakeling. Each proteinase activity was recognized in all fish ested. Specific activity of acid and neutral proteinases was large in the deep-sea fish, but tissue activity was small. The alkaline proteinase activity was recognized also in common mackerel and sardine, though the activity had not been detected previously in these fish. There was a fair difference among species in this specific activity; especially in sardines the activity was very large.

抄録全体を表示

1963年 (昭和39年) 前半の異常冷水期に北方系の魚類が相模湾とその近くに出現した事に就いてはさきに報告したが, その後1954年12月に駿河湾でホッケが1尾漁獲されたのを見, また1963年3月か4月に伊東市川奈の定置網で獲れたホッケの標品を見る事が出来た。
1966年 (昭和41年) 前半も冷水が伊豆七島からその近くに亙つて停滞し, その為か南日本 (犬吠岬以南) で始めてギンダラが5月6日と6月22日に1尾ずつ, 初島沖の深度650mで延縄にかかつた。5月11日には岩の沖合で, 6月19日には大磯の沖合でそれぞれ1尾 (ともに深度760mで) 延縄でが獲れ, また6月中に伊東市富戸の定置網にこのカレイが1尾入つた。これらは1966年前半の伊豆付近冷水塊の停滞に伴う多くの異常現象の, ほんの一部であろうと思われるふしがある。

抄録全体を表示

噴火湾産アカガレイの 3 つの卓越年級群（1989，1991，1995 年級群）の成長様式を調べた。雌雄ともに成長は，3 歳までの若齢期はベルタランフィ式で，以降は線形式に切換えたモデルが良好な適合を示した。3 歳以降の線形な成長は，主餌料がクモヒトデ類や小型甲殻類から栄養価の高い魚類や甲殻類十脚目に転換するためと考えられた。採集時の全長よりも，中高齢魚の耳石輪紋径から逆算した全長の方が小型の全長を示したのは，耳石と全長の成長の季節的差と，刺網によって成長の良い個体ほど早期から漁獲されるためかもしれない。

抄録全体を表示

Attempts were made to identify biochemically two gampylid fishes, escolar (“aburasokomutsu”) Lepidocybuum Flavobrunneum and castor oil fish (“baramutsu”) Ruvettus pretiosus, whose muscles contain a large amount of wax esters and hence may casuse a food poisoning when ingested. Myogen fractions were prepared from the ordinary muscles of both fishes as well as various fishes, and subjected to polyacrylamide gel electrophoresis, followed by staining with Coomassie brilliant bule for protein and with reagents for lactate and malate dehydrogenase activities. Results showed that the protein pattern is species-specific enougy to distinguish the two gempylid fishes from any of the other fishes tested. The pattern of either dehydrogenase was found to be less species-specific. However, simultaneous analyses of MDH and protein patterns faciliated the identification of buth gempylid fishes. Cellulose acetate membrane electrophophoresis was also found to be applicable for this purpose, though less satisfactorily.

抄録全体を表示

A single specimen of Atheresthes evermanni Jordan and Starks, 1904 (Pleuronectiformes: Pleuronectidae) was collected from Sagami Bay, Japan, at a depth of 150 m on March 18, 2014. The specimen represents the first record of A. evermanni from Sagami Bay and is the southernmost record of the species. The species was characterized by the following combination of characters: eyes on right side of body, the upper not positioned on top of head; body without bony tubercles on ocular side; mouth large; teeth canine-like, and sometimes depressible; gill rakers slender; lateral line almost straight, without curve above pectoral fin; caudal fin emarginate. The counts and measurements are provided.

抄録全体を表示