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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국수산과학회 Fisheries and Aquatic Sciences Fisheries and Aquatic Sciences 제23권 제2호
발행연도
2020.1
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This study was conducted in Lake Hayq between January and December 2018. The objectives of this study were to determine the growth, condition, sex ratio, fecundity, length at first sexual maturity (L50), and spawning seasons of common carp (Cyprinus carpio). Monthly fish samples of C. carpio were collected using gillnets of stretched mesh sizes of 4, 6, 7, 8, 10, and 13 cm and beach seines of mesh size of 6 cm. Immediately after the fish were captured, total length (TL) and total weight (TW) for each individual were measured in centimeters and grams, respectively, and their relationship was determined using power function. Length at first maturity (L50) was determined for both males and females using the logistic regression model. The spawning season was determined from the frequency of mature gonads and variation of gonadosomatic index (GSI) values of both males and females. Fecundity was analyzed from 67 mature female specimens. The length and weight relationship of C. carpio was TW = 0.015TL2.93 for females and TW = 0.018TL2.87 for males that indicate negative allometric growth in both cases. The mean Fulton condition factor (CF) was 1.23 ± 0.013 for females and 1.21 ± 0.011 for males. The value of CF in both cases was > 1 that shows both sexes are in good condition. Among the total 1055 C. carpio collected from Lake Hayq, 459 (43.5%) were females and 596 (56.5%) were males. The chi-square test showed that there was a significant deviation between male and female numbers from 1:1 ratio (χ2= 22, df = 11, P > 0.05) within sampling months. The length at first sexual maturity (L50) for females and males were 21.5 and 17.5 cm, respectively. Males mature at smaller sizes than females. The spawning season of C. carpio was extended from February to April, and the peak spawning season for both sexes was in April. The average absolute fecundity was 28,100 ± 17,462. C. carpio is currently the commercially important fish while Nile tilapia fishery has declined in Lake Hayq. Therefore, this baseline data on growth, condition, and reproductive biology of common carp will be essential to understand the status of the population of carp and design appropriate management systems for the fish stock of Lake Hayq, Ethiopia, and adjacent countries.

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참고문헌 (44)

참고문헌 신청
Abera L / 2015 / Some aspects of reproductive biology of the common carp(Cyprinus Carpio Linnaeus, 1758)in Lake Ziway, Ethiopia / Global J Agric Res Rev 3:151~157 google schola Aera NC / 2014 / Length-weight relationship and condition factor of common carp, (Cyprinus carpio)in Lake Naivasha, Kenya / Int J Curr Res 6:8286~8296 google schola Asnake W. / 2010 / Fish resource potential and some biological aspect of Oreochromis niloticus and Cyprinus carpio in Lake Ardibo, Northern Ethiopia google schola Bagenal TB / 1987 / Methods for assessment of fish production in freshwaters / Blackwell Scientific Publications google schola Bagenal TB / 1978 / Methods for assessment of fish production in freshwaters. Handbook no.3 / Blackwell :101~136 google schola

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