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- Title
Spawning habitat characteristics of pond smelt Hypomesus nipponensis in small inlet rivers to Lake Yogo, central Japan.
- Authors
Kakuta, Kyohei; Narita, Ippei; Ishizaki, Daisuke; Kai, Yoshiaki; Kikko, Takeshi
- Abstract
For stock enhancement of the pond smelt Hypomesus nipponensis in Japan, eyed eggs have been transplanted into numerous lakes, ponds, and reservoirs throughout the country from a number of major lake populations. For consistent effective stock enhancement, propagation skills in the recipient lakes, including conservation of spawning habitats and construction of artificial spawning sites, are necessary, independent of eyed-egg transplantation from other lakes. The physical characteristics of the spawning habitats selected by pond smelt in 6 rivers feeding Lake Yogo were surveyed, focusing on water velocity, depth, and substrate. The analysis using Jacobs' selective index shows that pond smelt selectively spawn at sites in shallow depth (5–30 cm), with moderate water velocity (10–50 cm/s), utilizing gravel, pebbles, and sand in riffles, as opposed to mud and silt near the river mouths. The biological information gained in this study is useful background for the conservation of spawning habitats and construction of artificial spawning sites in other regions of Japan.
- Subjects
JAPAN; ARTIFICIAL habitats; PONDS; LAKES; HABITAT conservation; SMELL; AGGREGATE industry
- Publication
Fisheries Science, 2023, Vol 89, Issue 6, p761
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1007/s12562-023-01722-5