ヨシノボリの研究 IV. : 4型共存河川でのすみわけ
STUDIES ON A FRESHWATER FISH, RHINOBIUS BRUNNEUS (GOBIIDAE) IV. : HABITAT SEGREGATION AMONG SYMPATRIC POPULATIONS OF 4 COLOUR TYPES

Nobuhiko MIZUNO, Shin-ichi UEHARA, Michio MAKI
1979 Nihon Seitai Gakkaishi  
. 1979、 Studies on a freshwater fish , Rhinogobius brutmeus ( Gobiidae ) IV . Habitat segregation among sympatric populations of 4 co ! our types. Jap. 」. Eco1. , 29 :137 − 147. Rhinogob ' us brunneus ( = R . ∫カnil ' s )is a common freshwater goby in Japan. Recently , from their colour pattems , these amphidromous fishes have been divided into four types , namely , Cobalt typc , Large−black type , Black type and Cross − band type , out of which at least Iattcr three types werc once described as
more » ... c once described as a different specles . As our second report dealing with the problem of the speciation of these four typos , this paper deals with tho distribution of these sympatric popu 】 ations in two small strea ! ns ・ The detailed examination revealed that they clearly segregated as for their longitudinal distri 胴 butions , or , in the case ofco − cxistence 三 n the same reaches , as for their habitats in relation to rivcr −bed type as we 】 l as to flow vdoclty . By scrutinizing the scattered informations on the distributien of these four types of R . brunneus a 皿 d lts oongeneric species , the habitat segregation of these four types was concluded to be not a selective but a interactive one , and that the typical pattern of the habitat segre − gation in one stream among Japanese freshwater gobies ofthe Genus Rhinogobius was schematized
doi:10.18960/seitai.29.2_137 fatcat:rzjufspljzhjbcbv6dzsb4r4cy