TY - JOUR
T1 - Selection of spawning habitat by several gobiid fishes in the subtidal zone of a small temperate estuary
AU - Inui, Ryutei
AU - Onikura, Norio
AU - Kawagishi, Motoyoshi
AU - Nakatani, Masaya
AU - Tomiyama, Yuta
AU - Oikawa, Shin
N1 - Funding Information:
Acknowledgments We wish to thank Michiyasu Yoshikuni, Jun Nakajima, Katsuhisa Eguchi, and the students of the Fishery Research Laboratory, Kyushu University, for providing invaluable advice and assistance with the field work. We specially thank the Fisheries Cooperative Association of Fukae and the Fukuoka Prefecture Agency for granting us permits to collect samples from Ikisan Estuary. A part of this study was conducted in association with the Go-kasegawa Group of the Academic Research Group of River Ecosystem and supported by the Foundation for Riverfront Improvement and Restoration, Tokyo, Japan.
PY - 2010/1
Y1 - 2010/1
N2 - We examined the spawning sites of several gobiid fishes in the subtidal zone of a small temperate estuary and determined the relationship of the nest abundance of each species with several environmental conditions, including water temperature, salinity, median particle size, proportion of silt and clay, current width, maximum water depth, distance from each site to the river mouth, and density of objects (boulders, cobbles, empty oyster shells, and empty clam shells) in the water. During this study, we found 115 nests belonging to the following six species: Favonigobius gymnauchen, Tridentiger obscurus, Leucopsarion petersii, Acanthogobius lactipes, Rhinogobius giurinus, and Tridentiger trigonocephalus. Stepwise multiple regression analysis, which was used to determine the best model for the nest abundance of all species, revealed that the nest abundance of each species clearly increased with an increase in the density of spawning substrates, such as cobbles and bivalve shells. These results show that the density of spawning substrates is a crucial factor affecting the selection of spawning habitats by each species.
AB - We examined the spawning sites of several gobiid fishes in the subtidal zone of a small temperate estuary and determined the relationship of the nest abundance of each species with several environmental conditions, including water temperature, salinity, median particle size, proportion of silt and clay, current width, maximum water depth, distance from each site to the river mouth, and density of objects (boulders, cobbles, empty oyster shells, and empty clam shells) in the water. During this study, we found 115 nests belonging to the following six species: Favonigobius gymnauchen, Tridentiger obscurus, Leucopsarion petersii, Acanthogobius lactipes, Rhinogobius giurinus, and Tridentiger trigonocephalus. Stepwise multiple regression analysis, which was used to determine the best model for the nest abundance of all species, revealed that the nest abundance of each species clearly increased with an increase in the density of spawning substrates, such as cobbles and bivalve shells. These results show that the density of spawning substrates is a crucial factor affecting the selection of spawning habitats by each species.
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U2 - 10.1007/s12562-009-0192-z
DO - 10.1007/s12562-009-0192-z
M3 - Article
AN - SCOPUS:76349095350
SN - 0919-9268
VL - 76
SP - 83
EP - 91
JO - Fisheries science
JF - Fisheries science
IS - 1
ER -