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http://dx.doi.org/10.7850/jkso.2013.18.2.104

Direct Observations of Spawning Characteristics on the Hexagrammidae Fishes in Korean Coastal Waters Using SCUBA Diving  

LEE, YONG-DEUK (Department of Marine Biology & Aquaculture, Gyeongsang National University)
KIM, JUN-SOP (Research Institute for Coastal Environment and Fishery-policy)
JUNG, JEE-HYUN (Korea Institute of Ocean Science and Technology)
SHIM, WON-JOON (Korea Institute of Ocean Science and Technology)
GWAK, WOO-SEOK (Department of Marine Biology & Aquaculture, Gyeongsang National University)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.18, no.2, 2013 , pp. 104-109 More about this Journal
Abstract
The spawning characteristics of Hexagrammos agrammus and Hexagrammos otakii was directly observed in coastal regions of the Yellow Sea and South Sea during the spawning seasons using scuba diving. The territorial male H. agrammus showed different body size, nuptial coloration and nest location compared to those of H. otakii, even though both species caring egg masses were found at the almost same depths. In the West sea, a relatively small guardian H. agrammus male protects 1-2 egg masses laid on a clump of red algae within his territory. The territorial males in red nuptial coloration and their egg masses were well camouflaged in their surroundings. Contrary to H. agammus, a guardian H. otakii male in yellowish nuptial coloration protects 4-8 egg masses in a nest. In addition, their nests were located on the relatively open environments such as discarded fishing nets, rock crevices and a clump of algae. The results of present study shows that even though both of two species belonged to Hexagrammidae, they have different strategies for spawning and protecting their egg masses.
Keywords
Hexagrammos agrammus; Hexagrammos otakii; spawning; egg masses; scuba survey;
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