• Korean Journal of Fisheries and Aquatic Sciences
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• v.29 no.4
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• pp.450-455
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• 1996

To investigate the food organisms of the shad (Konosirus punctatus) during the postlarval stage, the gut contents of the shad, captured in Kwangyang Bay in June 1990, were observed. The food organisms food items of the shad larvae of $4.8\~5.0mm$ (NL) were copepod eggs and copepod nauplii, whereas those of the larvae longer than 5.0 mm (NL) were copepod nauplii and Tintinnopsis.

• Fisheries and Aquatic Sciences
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• v.10 no.1
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• pp.24-29
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• 2007

Our objective was to clarify the cytogenetic characteristics, including karyotypes, cellular DNA content, and nuclear size of erythrocytes, of black plaice Pleuronectes obscurus, dotted gizzard shad Konosirus punctatus, and perch sculpin Pseudoblennius percoides, collected from the coastal areas of Jo Island, Busan, Korea. Karyotypes of P. obscurus and K. punctatus both had a diploid number of 48 and a fundamental number (FN) of 48, with a chromosome formula of 48T. The karyotype of p. percoides had a diploid number of 46 and FN of 56, with a chromosome formula of 10SM +36T. No sex-associated heteromorphic pairs were detected for any species. The variation in DNA values (P. obscurus=1.15 pg/nucleus, K. punctatus=1.56pg/nucleus, P. percoides=1.11 pg/nucleus) was positively related to variation in chromosome FN.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.48 no.5
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• pp.752-759
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• 2015

We examined the feeding habits of larval Konosirus punctatus using 165 specimens collected from May to August 2011 in the Nakdong River estuary, Korea. We found that larval K. punctatus [3.9-8.4 mm notochord length (NL)] are carnivorous, consuming mainly rotifers. Their diet also included small numbers of rhizopods, tintinnids, euglenoids, copepods, larval bivalves, dinoflagellates, diatoms, and unidentified materials. To evaluate ontogenetic changes in dietary composition, we split the larvae into three size groups: < 5 mm, 5-6 mm, and > 6 mm NL. The smallest size group frequently preyed on rhizopods. As NL increased, the number of rotifers increased relative to those of rhizopods. Larvae also showed bimodal feeding for feeding incidence, with peaks in the midafternoon and at midnight, while the mean number of prey per individual peaked at 18:00-19:00 h.

• Development and Reproduction
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• v.11 no.2
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• pp.127-135
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• 2007

In order to monitor the developmental features of embryos, larvae, and juveniles of Konoshiro Gizzard Shad Konosirus punctatus, the fertilized eggs were gotton using artificial insemination. Konosirus punctatus were caught in Mankyung-myeon, Kimjae, Jeollabuk-do at June of 2004, and experiments were carried out in Ichthyology laboratory in Chonnam National University. Konosirus punctatus spawned draft egg from March to June. The fertilized eggs were cultured in $19.0{\sim}23.0^{\circ}C$(mean, $21.2^{\circ}C)$. The eggs had spherical shape and the diameter is $1.14{\sim}1.34\;mm$(mean, 1.21 mm). The lens began to appear from 35 hr 53 min after fertilization. At the moment, the movement of larvae was more active, and the tail was separated completely from yolk, the heart had forms, and melanophore appeared. Hatching was observed from 37 hr 10 min after fertilization. The total length of the hatched larvae was $4.26{\sim}5.30\;mm$(mean, 4.96 mm), but the mouth and anus were not opened at the time when the larva had yolk sack, and had $22{\sim}27$ myometium, and the anus located just abdominal front of the tail fin, and melanophore accumulated in the eye. Post-larvae used yolk completely after 2 day of hatching, and the total length was $4.96{\sim}5.74\;mm$(mean, 5.24 mm). From 16 days after hatching, the tail had curved tail end, and appeared the stems for pectoral, dorsal, and caudal fins. At 53 days after hatching, the total length of post-larvae was $27.11{\sim}34.09\;mm$(mean, 30.11 mm), and the frontal part of head developed like an adult one. At this time, fins and body are transferred to those of adult Konosirus punctatus. Fishes have a different shape and location of melanophore even in the same family. This research was tried to elucidate the early developmental features of Konosirus punctatus, together with species-specific pattern of melanophore.

• 한국해양학회지
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• v.26 no.1
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• pp.47-58
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• 1991

To study the spatio-temperal distribution of the ichhyoplankton in the estuarine ecosystem, Ichthyoplankton were sampled with associated data on water temperature and salinity in Mankyong-Dongjin Estuary on October, 1989, and March, May and July, 1990. Water temperature varied seasonally, showing homogeneous spatial pattern. The spatial difference in splinty was determined by the amount of river runoff. Few Ichthyoplankton occurred in October and March. In May, Konosirus punctatus occupied most of the ichthyoplankton. In July, Sardinella zunasi, Engraulis japonica, Gobiidae, and Thrissa sp. were the dominant species. The eggs and larvae of Engraulis japonica were collected from the outer bay, while those of Konosirus punctatus predominated in the less saline inner bay. Konosirus punctatus. Sardinella zunasi, Gobiidae, and Thrissa sp. were the characteristic species of this estuary. They were considered to be spawned and grown during their early life stage in the less saline water.

• Proceedings of the Korean Aquaculture Society Conference
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• 2006.05a
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• pp.548-549
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• 2006

• Proceedings of the Korean Aquaculture Society Conference
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• 2005.05a
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• pp.179-179
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• 2005

• Proceedings of the Korean Aquaculture Society Conference
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• 2005.05a
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• pp.178-178
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• 2005

• Korean Journal of Ichthyology
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• v.9 no.2
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• pp.235-243
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• 1997

The seasonal changes in species composition of fishes in Kwangyang Bay were determined using bimonthly samples with a bottom trawl at five stations from February to December 1990. A total of 32 families 54 species, 9,497 individuals, and 65,838.2g of fishes were collected. Leiognathus nuchalis occupied 64.9% of the total number of individuals. L. nuchalis and Konosirus punctatus occupied 28.8% and 22.3% of the total biomass, respectively. The number of species, the number of individuals and the biomass were lowest in February. More than 20 species occurred during the period when the water temperature was higher than $12^{\circ}C$. The number of individuals was the highest in October. The biomass was the highest in April. The community structure of fish in Kwangyang Bay showed the seasonal variation according to Leiognathus nuchalis and Konosirus punctatus.

• Korean Journal of Ichthyology
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• v.19 no.2
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• pp.132-141
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• 2007

A total of 27 fish species were collected by a gill net in Masan Bay. The dominant fish species were Konosirus punctatus, Mugil cephalus, Engraulis japonicus, Psenopsis anomala, Lateolabrax japonicus, Leiognathus nuchalis, Chelon affinis, Trachurus japonicus, and these accounted for 87.6% of the total numbers. The numerically dominant fish species made up 95.4% of biomass. These were primarily juvenile species or early larger species. Temporal variation in both species composition and abundance was large: the peak number of fishes occurred in March 2005 and July 2005, whilst biomass of fishes was the highest in September 2005 and November 2005. Fish numbers as well as biomass was lowest in November 2005. Temporal changes in the abundance of fishes corresponded with temperature. A gill net can be used as an alternative fishing gear to collect pelagic fishes commercially, although a gill net has a strong selectivity for the target fish species or for size.