びわ湖内湾の水生植物帯における仔稚魚の生態 : III ニゴロブナ仔稚魚の食性と生息域の関係
ECOLOGICAL STUDIES ON FRY AND JUVENILE OF FISHES AT AQUATIC PLANT AREAS IN A BAY OF LAKE BIWA

Ken-ichi HIRAI
1972 Nihon Seitai Gakkaishi  
Synopsis HIRAI , Ken −ichi ( Biol. Inst. , Fac . Ed . , Kanazawa Univ . ,1 (anazawa ) Ecological studies on fry and juvenile of fishes at aquatic plant areas in a bay of Lake B 三 wa . II1. Relation . ship of the food habits to the hab 辻 at of nigorobuna ( ( ; arassius car αssiws glandoc % 弼s ) 1arvae. Jap . J . Eco1 .22,69 − 93 〔 1972 ) The relationship Qf the food habits to the habitat of nigorobuna larvae was investigated at Ya 皿 anoshita Bay in the south basin Qf Lake Biwa from 1964 to 1968
more » ... from 1964 to 1968 , Quan 七 itative analyses of feeding of the larvae were for consideration on the significance of the aquatic plant belt as the habitat of the Iarvae. Though the larvae are more or less distributed throughQut the aquatic plant belt. they are very abundan 七 洫 the submerged plant belt. The more abundant 飾 ating plan七 materials present、 the higher the density of the Iarvae is observed . It is commonly observed that there is a iairly good quantity of plankters available for the nigorobuna larvae in the aquatic plant belt, and their amount increases corresponding tQ that o 正 the fioating plant m [ aterials . The nigorobuna larvae devoured small Crustacea and chironomid larvae which a エ e commonly found in the aquatic plant belts, above all they eat Chydorus intensively . The bulk of the gut contents of the larvae increase in accordance with the increase of the amQunt of 七 he plankters. The food habits of the nigorobuna larvae is discussed in relation to the 辻 habitat prefere 鵬 lt iS ・ug9 ・・t・d th ・ t ・ ・ubm ・・ g ・ d p1 ・ nt b ・lt with ・ bundant fi ・ ・ ti・ g Pl ・ nt m ・ te「i・ ls where num ・mu ・ ・m ・ ll・弖 ・ d・ ・e ・an ・ 且・u ・i・h , iS th ・ 皿 ・ ・t f・ v ・ u ・ abl ・ a ・ an ... e ・ y 9工 ound for the 皿 igorobuna Iarvae . は じ め に
doi:10.18960/seitai.22.2_69 fatcat:eeao2ztdpff3xgf2lh4oa2q3lu