このエントリーをはてなブックマークに追加
ID 52394
file
creator
Yoshida, Yusei
subject
Coastal habitats
Food availability
Growth
Secondary production
Gobiidae
abstract
The sharp-nosed sand goby Favonigobius gymnauchen is one of the most dominant fish species around tidal flats and sandy beaches in Japan and plays an important role in the food web. To clarify the habitat utilization and secondary production of F. gymnauchen in these waters, we investigated the density, size compositions, feeding, and prey availability in sandy beaches, a muddy sand estuary, and a seagrass bed in Hiroshima Bay, central Seto Inland Sea, Japan. The density of F. gymnauchen was the highest in the estuarine habitat and the lowest in the sandy beaches. They mainly consumed copepods, gammarids, and polychaetes. The body sizes of F. gymnauchen were larger in the estuarine habitat than in the seagrass bed, although prey availability was higher in the seagrass bed than in the estuary. Secondary production of F. gymnauchen was the highest (> 1 g wet weight m−2 year−1) in the estuarine habitat. The growth rate in the estuarine habitat was estimated to be 0.2 mm d−1. In a laboratory experiment in which fish were exposed to various salinity conditions and fed excess food, the feeding and growth of F. gymnauchen were not significantly different at salinities of 5, 15, and 30, and the maximum growth of juveniles at nearly 25 °C was estimated to be 0.2 mm d−1. These results indicate that F. gymnauchen grows at nearly maximum rates in estuarine habitats despite their high density, thereby resulting in the high secondary production of this species.
description
This study was partly supported by JSPS KAKENHI Grant Number 19K06207.
journal title
Environmental Biology of Fishes
volume
Volume 104
start page
811
end page
823
date of issued
2021-07-12
publisher
Springer
issn
1573-5133
0378-1909
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
© The Author(s), under exclusive licence to Springer Nature B.V. 2021
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10641-021-01116-5
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
relation url
department
Graduate School of Integrated Sciences for Life
note
The full-text file will be made open to the public on 12 July 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving'