Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in Lake Hayq, Ethiopia
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 (L 50), and spawning seasons of common carp (Cyprinus carpio). Monthly fish samples o...
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The Korean Society of Fisheries and Aquatic Science
2020-06-01
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| Series: | Fisheries and Aquatic Sciences |
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| Online Access: | http://www.e-fas.org/archive/view_article?pid=fas-23-0-16 |
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| author | Assefa Tessema Abebe Getahun Seyoum Mengistou Tadesse Fetahi Eshete Dejen |
| author_facet | Assefa Tessema Abebe Getahun Seyoum Mengistou Tadesse Fetahi Eshete Dejen |
| author_sort | Assefa Tessema |
| collection | DOAJ |
| description | 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 (L 50), 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 (L 50) 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 (C F) was
1.23 ± 0.013 for females and 1.21 ± 0.011 for males. The value of C F 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 (χ 2 =
22, df = 11, P > 0.05) within sampling months. The length at first sexual maturity (L 50)
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. |
| first_indexed | 2024-12-11T14:56:13Z |
| format | Article |
| id | doaj.art-b1ad12d035c2408aaba32a011aad59a0 |
| institution | Directory Open Access Journal |
| issn | 2234-1757 |
| language | English |
| last_indexed | 2024-12-11T14:56:13Z |
| publishDate | 2020-06-01 |
| publisher | The Korean Society of Fisheries and Aquatic Science |
| record_format | Article |
| series | Fisheries and Aquatic Sciences |
| spelling | doaj.art-b1ad12d035c2408aaba32a011aad59a02022-12-22T01:01:19ZengThe Korean Society of Fisheries and Aquatic ScienceFisheries and Aquatic Sciences2234-17572020-06-012310.1186/s41240-020-00162-xfas-23-0-16Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in Lake Hayq, EthiopiaAssefa Tessema0Abebe Getahun1Seyoum Mengistou2Tadesse Fetahi3Eshete Dejen4 Department of Zoological Sciences Addis Ababa University , Addis Ababa, Ethiopia Department of Zoological Sciences Addis Ababa University , Addis Ababa, Ethiopia Department of Zoological Sciences Addis Ababa University , Addis Ababa, Ethiopia Department of Zoological Sciences Addis Ababa University , Addis Ababa, Ethiopia Intergovernmental Authorities on Development (IGAD) , Djibouti City, DjiboutiThis 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 (L 50), 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 (L 50) 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 (C F) was 1.23 ± 0.013 for females and 1.21 ± 0.011 for males. The value of C F 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 (χ 2 = 22, df = 11, P > 0.05) within sampling months. The length at first sexual maturity (L 50) 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.http://www.e-fas.org/archive/view_article?pid=fas-23-0-16growthfulton condition factorsex ratiolength at first sexual maturity spawning seasonsfecundity |
| spellingShingle | Assefa Tessema Abebe Getahun Seyoum Mengistou Tadesse Fetahi Eshete Dejen Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in Lake Hayq, Ethiopia Fisheries and Aquatic Sciences growth fulton condition factor sex ratio length at first sexual maturity spawning seasons fecundity |
| title | Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in
Lake Hayq, Ethiopia |
| title_full | Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in
Lake Hayq, Ethiopia |
| title_fullStr | Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in
Lake Hayq, Ethiopia |
| title_full_unstemmed | Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in
Lake Hayq, Ethiopia |
| title_short | Reproductive biology of common carp (Cyprinus carpio Linnaeus, 1758) in
Lake Hayq, Ethiopia |
| title_sort | reproductive biology of common carp cyprinus carpio linnaeus 1758 in lake hayq ethiopia |
| topic | growth fulton condition factor sex ratio length at first sexual maturity spawning seasons fecundity |
| url | http://www.e-fas.org/archive/view_article?pid=fas-23-0-16 |
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