Seasonal pattern and community structure of fishes in the shallow tidal creek of Obitsu-gawa River Estuary of inner Tokyo Bay, central Japan
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 5
Abstract
Seasonal pattern and the community structure of fishes in the shallow tidal creek of Obitsugawa River Estuary of inner Tokyo Bay was studied for one year. Family Gobiidae corresponded to 98% of the total catch. Dominant species were Gymnogobius uchidai, Gymnogobius macrognathos, Gymnogobius breunigii, Eutaeniichthys gilli, Pseudogobius masago and Favonigobius gymnauchen. Stepwise modelling in canonical correspondence analysis indicated that season (p=0.02) best explained the variation in abundance of fish in this shallow habitat. There was a difference in fish community between spring and summer while only a small difference was observed between summer and autumn as well as winter and autumn. Species dominance was an inherent property of the tidal creek fish community particularly in spring beacuse of the remarkable abundance of G. uchidai. However, the fish community had the tendency to become proportionately even as the season progresses from spring to winter. The occurrence of a particular life history stage generally showed a strong association with month and water temperature. Adults substantially contributed to the population size structure of P. masago and G. uchidai while juvenile 2 for G. breunigii and E. gilli. Larvae significantly contributed to the population size structure of F. gymnauchen while juvenile 1 and juvenile 2 for G. macrognathos. The current study indicated that natural shallow habitat within a highly urbanized metropolitan area in inner Tokyo Bay can serve as a habitat for fishes and the prevalence of certain life history stages of estuarine species indicated the importance of the said habitat at certain part of their life history.
Authors and Affiliations
Joeppette Hermosilla, Yasushi Yasushi , Daisuke Okazak, Yukihiro Hoshino, Masato Moteki, Hiroshi Kohno
Keywords
Related Articles
- EP ID EP87289
- DOI -
- Views 87
- Downloads 0
Legal and economic key points regarding sustainable use of water resources.
The paper aims to provide the reader recent information on this topic. We offered a brief overview of main key points on sustainable use of water resources. We approached aspects on water law, water footprint and economi...
Use of commercial live feeds enrichment during first feeding period of the barber goby Elacatinus figaro
The first feeding period is the most critical phase for the production of marine fish larvae. The utilization of n-3 HUFA enrichment on live feed has improved the results for several species during the larviculture. To e...
ISO/TC 234, Fisheries and Aquaculture
The largest standard developing organization, ISO, works these days at International Standards for Fisheries and Aquaculture. They created a technical committee divided in six work groups that will have to establish cage...
Marine strategy directive: A legal tool for European SEAS protection
The Marine Strategy Framework Directive constitutes the main vital environmental component for the future EU maritime policy, designed to achieve full economic potential of oceans and seas in accordance with the marine e...
The most important Romanian researches on species Pseudorasbora parva (Temminck & Schlegel, 1846) (Teleostei, Cyprinidae)
The authors present shortly some data regarding the origin and occurrence of species Pseudorasbora parva, then they realise an analysis of the most important papers written by Romanian authors, both in our country and ab...