BIOLOGI REPRODUKSI IKAN BETOK (Anabas testudineus) DI PAPARAN BANJIRAN LUBUK LAMPAM,KABUPATEN OGAN KOMERING ILIR

Ikan betok (Anabas testudineus) adalah salah satu jenis ikan ekonomis penting yang dihasilkan dari perairan paparan banjiran. Penelitian yang bertujuan untuk mengkaji beberapa aspek biologi reproduksi ikan betok di paparan banjiran Lubuk Lampam, Kabupaten Ogan Komering Ilir dilakukan pada bulan Nopember 2012-Oktober 2013. Sampel ikan ditangkap setiap bulanmenggunakan alat tangkap jaring dan bengkirai.Analisis data meliputi sebaran frekuensi ukuran panjang, nisbah kelamin, tingkat kematangan gonad, indeks kematangan gonad, ukuran pertamakali matang gonad, potensi reproduksi dan pola reproduksi. Jumlah sampel ikan betok yang diperoleh sebanyak 540 ekor, terdiri dari 187 ekor ikan jantan dan 353 ekor ikan betina, dengan kisaran panjang ikan betina antara 27-224 mm dan ikan jantan antara 48-243 mm. Rasio kelamin ikan jantan dan betina adalah 0,53 : 1. Tingkat kematangan gonad (TKG) ikan jantan dan betina yang paling banyak ditemui adalah TKG I dengan frekuensi tertinggi pada ukuran 116-132 mm dan 114-129 mmmasing-masing berjumlah 34 dan 33 ekor. Perkembangan tingkat kematangan gonad ikan betok dipengaruhi oleh perubahan tinggimuka air secara musiman. Indek kematangan gonad ikan jantan pada TKGIV berkisar 1,3-15,0%dan ikan betina berkisar antara 1,2 17,1%. Ukuran pertama kali matang gonad ikan betina adalah pada panjang total 160 mm dan ikan jantan pada panjang total 177 mm. Fekunditas ikan betok berkisar antara 224–182.736 butir dengan diameter telur berkisar antara 0,465-1,026 mmdengan pola pemijahan secara sebagian. Climbing perch, Anabas testudineus is a dominant commercial fish inhabit floodplain area of Lubuk Lampam, Ogan Komering Ilir Regency. A study aimed to investigate some aspects of the reproductive biology of climbing perch has been conducted at floodplain of Lubuk Lampam, Ogan Komering Ilir regency from November 2012 to October 2013. Fish sampling was conducted every month using nets and bamboo trap. The data analysis includes lenght frequency distribution, sex ratio, the gonado maturity, gonado somatic index, the size at first maturity, fecundity and reproductive patterns. Climbing perch sample amounted of 540 specimen compose of 187 males and 353 females, with the lenght frequency between 27-224 mm (female) and 48-243 mm (male). Sex ratio of the male and female of the climbing perch was 0,53 : 1. The gonado maturity of male and female are mostly at the first level with the highest frequency between 116-132 mm and 114-129 mm, equivalent to 34 and 33 specimen, respectively. The development of gonado maturity of climbing perch was influenced by seasonally of water level fluctuation. Gonado somatic index of maturity of male and female range 1.3-15.0% and 1.2 -17.1%, respectively. The size at the first maturity of the female was 160 mm lenght and of the male was 177 mm lenght. The fecundity ranges 224 to182,736 eggs with the egg diameter ranges 0.465-1.026 mm and the climbing perch was classified into partially spawner.

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ASPEK REPRODUKSI IKAN BAUNG (Hemibagrus nemurus) DI PAPARAN BANJIRAN LUBUK LAMPAM KABUPATEN OGAN KOMERING ILIR

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.7.3.2015.137-146 ◽

2015 ◽

Vol 7 (3) ◽

pp. 137

Author(s):

Eko Prianto ◽

Mohammad Mukhlis Kamal ◽

Ismudi Muchsin ◽

Endi Setiadi Kartamihardja

Keyword(s):

Sex Ratio ◽

Economic Value ◽

Reproductive Potential ◽

Male And Female ◽

Gill Net ◽

Fish Samples ◽

Index Value ◽

First Maturity ◽

Somatic Index ◽

Important Fish

Ikan baung (Hemibagrus nemurus) merupakan salah satu jenis ikan ekonomis penting di perairan umum daratan Indonesia khususnya Kabupaten Ogan Komering Ilir. Ikan ini memiliki nilai ekonomis penting untuk ikan konsumsi. Pada tahun 2004 hasil tangkapan ikan baung di Sumatera Selatan berjumlah 1.684,6 ton sedangkan pada tahun 2005 berjumlah 899,5 ton. Penelitian ini bertujuan untuk mengetahui aspek reproduksi ikan baung di paparan banjiran. Lokasi penelitian di Lubuk Lampam Kabupaten Ogan Komering Ilir Provinsi Sumatera Selatan dimulai bulan Nopember 2012-Nopember 2013. Ikan sampel dikumpulkan dari hasil tangkapan nelayandan hasil tangkapan percobaan dengan menggunakan alat tangkap jaring insang (gill net), pancing (pole and line), bubu dan bengkirai (traps). Analisis datameliputi: nibah kelamin, tingkat kematangan gonad, indek kematangan gonad, ukuran pertama kali matang gonad, potensi reproduksi dan pola reproduksi. Sampel ikan baung berjumlah 384 ekor terdiri dari jantan dan betina masing-masing sebanyak 118 dan 266 ekor. Hasil penelitian menunjukkan nisbah kelamin ikan baung yang ditemukan dalam penelitian baung 0,44:1, yang menunjukkan nibah kelamin tidak seimbang. Nilai IKG ikan baung betina berkisar 1,8-14.3% sedangkan ikan baung 1,3-3,9%. Ukuran pertama kali (Lm) ikan yang matang gonad untuk baung jantan (232 mm) dan betina (332 mm). Rata-rata fekunditas ikan baung berjumlah 47.882+13.624 dengan pola pemijahannya adalah serempak.Baung (Hemibagrus nemurus) is one of the economically important fish species in Indonesiainland water, especially Ogan Ilir district. These fish have an important economic value as fish consumption. In 2004,production of baung in South Sumatra amount 1684.6 tons decreased to 899.5 tons in 2005. The aim of this research was to determine some aspects of reproductiveof green catfish in floodplain. The research location in a Lubuk Lampam floodplain Ogan Ogan Ilir South Sumatra began in November 2012-November 2013. Fish samples were collected by experimental fishing such gill nets, pole and line, traps. Data analysis includes sex ratio, level maturity, gonado somatic index, first maturity, reproductive potential and reproductive patterns. Green catfish samples have totally 384 specimen consist ofmales and females, 118 and 266 specimen, respectively. The results showed sex ratio of the male and female of green catfish was 0.44: 1, which shows the sex ratio isunbalanced. Gonado somatic index value of green catfish female ranged 1.8-14.3%while male was 1.3-3.9%. The size at the first maturity of the male and female of green catfish was 232 and 332 mm, repectively. Thefecundity average of green catfish range 47.882 + 13.624 and the spawning pattern of green catfish was classified into total spawner.

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REPRODUCTIVE ASPECTS OF SCALLOPED PERCHLET, Ambassis nalua (HAMILTON, 1822) IN PABEAN BAY INDRAMAYU, WEST JAVA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v9i1.17921 ◽

2017 ◽

Vol 9 (1) ◽

pp. 113-124 ◽

Cited By ~ 1

Author(s):

Nisha Desfi Arianti ◽

M.F. Rahardjo ◽

Ahmad Zahid

Keyword(s):

Sex Ratio ◽

Sampling Period ◽

Spawning Season ◽

Diameter Distribution ◽

Male And Female ◽

Fish Samples ◽

Males And Females ◽

Mature Fish ◽

First Maturity ◽

Egg Diameter

ABSTRACTScalloped perchlet, Ambassis nalua, is one of fishes in Pabean Bay, Indramayu. This research aims to determine the reproductive aspects of Ambassis nalua in Pabean Bay Indramayu including sex ratio, spawning season, first maturity, fecundity and spawning pattern. Fish samples were collected by trap net and trammel net at three sites in Pabean Bay from April to October 2015. A total of 424 of A. nalua were caught, consist of 114 males and 310 females; with total length ranged from 38.04 to 112.63 mm and total weight ranged from 0.37 to 25.44 g. Sex ratio of mature fish was 1:1.9. The mature males and females were found in every month of sampling period. The gonado-somatic index (GSI) ranged from 0.40 to 0.83 and 2.36 to 4.54 for male and female, respectively. The peak of spawning season was found in September. The first maturity (Lm50) for male and female were 79.17 mm and 91.25 mm, respectively. The fecundity varied from 3,451–32,465 eggs. Egg diameter distribution shows that spawning pattern of A. nalua was batch spawner. Keywords: Ambassis nalua, spawning season, sex ratio, reproduction

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REPRODUCTIVE BIOLOGY OF LONGTAIL TUNA (Thunnus tonggol) IN THE JAVA SEA

Indonesian Fisheries Research Journal ◽

10.15578/ifrj.26.2.2020.119-130 ◽

2020 ◽

Vol 26 (2) ◽

pp. 119

Author(s):

Thomas Hidayat ◽

Mennofatria Boer ◽

Mohammad Mukhlis Kamal ◽

Zairion Zairion ◽

Ali Suman

Keyword(s):

Sex Ratio ◽

Growth Pattern ◽

Pelagic Fish ◽

Maturity Stage ◽

Male And Female ◽

Multiple Spawning ◽

Java Sea ◽

First Maturity ◽

Longtail Tuna ◽

Somatic Index

Longtail tuna (Thunnus tonggol) is one of common economically important pelagic fish species in Indonesia. The objective of this study is examining the biology of reproduction, consisting of length of weight relationship, sex ratio, maturity stage, gonado somatic index (GSI), length at first capture, and length at first maturity and spawning pattern. A total of 633 longtail tuna, ranging 29-58 cmFL and consisting of 293 males and 340 females, were collected from the Java Sea between April 2018 and March 2019. The results showed that the longtail tuna growth pattern was isometric. The sex ratio was not significantly different between male and female. The length of first capture longtail tuna of drift gillnet (43.2 cmFL) was bigger than the length at first maturity (42,3 cmFL). This indicates that the most of longtail tuna caught by drift gillnet have already spawned. The peak’s spawning season occurred in May and November, with fecundity ranging from 783,597 - 1,579,160 eggs. Longtail tuna has multiple spawning pattern

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REPRODUCTIVE ASPECTS OF SCALLOPED PERCHLET, Ambassis nalua (HAMILTON, 1822) IN PABEAN BAY INDRAMAYU, WEST JAVA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v9i1.17921 ◽

2017 ◽

Vol 9 (1) ◽

pp. 113

Author(s):

Nisha Desfi Arianti ◽

M.F. Rahardjo ◽

Ahmad Zahid

Keyword(s):

Sex Ratio ◽

Sampling Period ◽

Spawning Season ◽

West Java ◽

Fish Samples ◽

Length Range ◽

Males And Females ◽

Mature Fish ◽

First Maturity ◽

Somatic Index

ABSTRACTScalloped perchlet, Ambassis nalua, is one of fishes in Pabean Bay, Indramayu. This research aims to determine the reproductive aspects of Ambassis nalua in Pabean Bay Indramayu including sex ratio, spawning season, first maturity, fecundity and spawning pattern. Fish samples were collected by trap net and trammel net at three sites in Pabean Bay from April to October 2015. A total of 424 of A. nalua were caught, consist of 114 males and 310 females; with total length ranged from 38.04 to 112.63 mm and total weight ranged from 0.37 to 25.44 g. Sex ratio of mature fish was 1:1.9. The mature males and females were found in every month of sampling period. The gonado-somatic index (GSI) ranged from 0.40 to 0.83 and 2.36 to 4.54 for male and female, respectively. The peak of spawning season was found in September. The first maturity (Lm50) for male and female were 79.17 mm and 91.25 mm, respectively. The fecundity varied from 3,451–32,465 eggs. Egg diameter distribution shows that spawning pattern of A. nalua was batch spawner. Keywords: Ambassis nalua, spawning season, sex ratio, reproduction

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Efficacy of exogenous hormone (GnRHa) for induced breeding of climbing perch Anabas testudineus (Bloch, 1792) and influence of operational sex ratio on spawning success

Animal Reproduction Science ◽

10.1016/j.anireprosci.2016.06.006 ◽

2016 ◽

Vol 171 ◽

pp. 114-120 ◽

Cited By ~ 4

Author(s):

Babita Mandal ◽

Rajesh Kumar ◽

P. Jayasankar

Keyword(s):

Sex Ratio ◽

Operational Sex Ratio ◽

Exogenous Hormone ◽

Anabas Testudineus ◽

Climbing Perch ◽

Spawning Success

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DOMESTIFIKASI IKAN BETOK Anabas testudineus MELALUI PEMIJAHAN DI WADAH BUDIDAYA (CLIMBING PERCH, Anabas testudineus DOMESTICATION THROUGH SPAWNING)

Fish Scientiae ◽

10.20527/fs.v2i4.1174 ◽

2016 ◽

Vol 2 (4) ◽

pp. 188

Author(s):

Untung Bijaksana ◽

Septiodrian R Balantek

Keyword(s):

Rainy Season ◽

Gonadal Development ◽

Water Levels ◽

Natural State ◽

Anabas Testudineus ◽

Climbing Perch ◽

Latent Time ◽

Egg Diameter ◽

Fish Gonads ◽

Spawning Success

Penelitian ini dimaksudkan sebagai upaya domestikasi Ikan Betok melalui pemijahan dalam wadah budidaya. Penelitian ini dilakukan di Laboratorium Basah Program Studi Budidaya Perairan Universitas Lambung Mangkurat . Tiga poin utama dalam mendukung keberhasilan pemijahan ikan, yaitu : perkembangan gonad , ovulasi dan pemijahan . Tentu perkembangan panjat bertengger gonad ikan terjadi pada awal musim kemarau puncak musim dan di awal musim hujan atau saat musim hujan , pemijahan terjadi . Keadaan alami ini mencoba untuk diadopsi dalam budidaya kontainer , dengan fashting selama 1 , 2 dan 3 hari dengan tingkat air , 10 , 15 dan 20 cm . Hasilnya adalah waktu yang laten dari 11,7 jam sampai 39 jam , fekunditas antara 5310-7376 butir , diameter telur 0,5 hingga 0,8 mm , tingkat fertilisasi antara 88,2-93,2 persen dan tingkat menetas antara 87 , 0-91,6 persen.The study is intended as an attempt domestication through climbing perch spawning in the container cultivation. The research was conducted at the Laboratory of Wetlands Program University Faculty of Fisheries Aquaculture Lambung Mangkurat. Three main points in support of the spawning success of fish, namely: gonadal development, ovulation and spawning. Naturally development climbing perch fish gonads occurred in the early dry season to peak season and at the beginning of the rainy season or during the rainy season, spawning occurred. This natural state is trying to be adopted in the cultivation of container, with fashting for 1, 2 and 3 days with water levels, 10, 15 and 20 cm. The result is a latent time of 11.7 hours to 39 hours, fecundity between 5310 to 7376 grains, egg diameter 0.5 to 0.8 mm, the degree of fertilization between 88.2 to 93.2 percent and the degree of hatching between 87, 0 to 91.6 percent.

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Reproductive biology of silurid catfishes Ompok miostoma (Vaillant 1902) in Mahakam River East Kalimantan

Jurnal Iktiologi Indonesia ◽

10.32491/jii.v19i1.387 ◽

2019 ◽

Vol 19 (1) ◽

Author(s):

. Jusmaldi ◽

Dedy Duryadi Solihin ◽

Ridwan Affandi ◽

MF Rahardjo ◽

Rudhy Gustiano

Keyword(s):

Sex Ratio ◽

Reproductive Biology ◽

Spawning Season ◽

Spawning Period ◽

Male And Female ◽

Gonad Maturity ◽

East Kalimantan ◽

Fish Samples ◽

Total Fish ◽

Somatic Index

Reproductive biology of silurid catfish O.miostoma(Vaillant 1902)as one of endemic species in Mahakam River East Kalimantan is not yet known. This study aimed to analysisreproductive aspect related to changing seasons, including sex-ratio, spawning season, spawning location, length at first gonad maturity, gonado-somatic index, and fecundity. Total fish samples (n=1214)were collected monthly from November 2013 to October 2014 at four locations in the Mahakam River, using many fishing gears.The results of this research showthe total length of fish ranged from 132.19 to 227.30 mm and weight ranged from 20.00 to 70.40 g. The overall sex ratio of male and female was1: 1.56, while at gonad maturity stages were1:1.77. The spawning season range from November to January and peak spawning occurs in December. The highest spawning location was found at swamp flood Semayang Lake. The length at first gonad maturity of male ranged of 191.05-202.60 mm, while it was in 179.56-198.50 female. Maximum average gonado-somatic index (GSI) values obtained for male and female were 0.32 and 2.07 respectively during spawning period in November and declined to minimum in February. The total fecundity and eggs diameter rangedfrom 2648 to 12495 eggsind-1and 0.61 to 1.30 mm respectively. There was a positive correlation between fecundity andtotal length and weightof fishes.AbstrakBiologi reproduksi ikan lais O. miostoma (Vaillant 1902)sebagai salah satu spesies endemik di Sungai Mahakam Kalimantan Timur belum pernah diketahui. Tujuan penelitian ini adalah menganalisisaspek reproduksi ikan laisberkaitan dengan perubahan musimyang mencakupnisbah kelamin, musim pemijahan, lokasi pemijahan, ukuran kali pertama matang gonad, indeks kematangan gonad dan fekunditas.Total ikan contoh 1214 ekor telah dikumpulkan setiap bulan mulai dari bulan November 2013 sampai Oktober 2014di empat lokasi perairan Sungai Mahakam, menggunakan berbagai alat tangkap. Hasil penelitian menunjukkanukuran panjang total ikan berkisar dari 132,19-227,30 mm dan bobot berkisar dari 20,00-70,40 gram.Nisbah kelamin seluruh ikan jantan dan betina yang diamati 1 : 1,56, sedangkanpada tahap kematangan gonad 1:1,77. Musim pemijahan terjadi mulai dari bulan November sampai Januari dan puncak pemijahan pada bulan Desember. Lokasi pemijahan tertinggi ditemukan di rawa banjiran Danau Semayang. Ukuran ikan pertamamatang gonad pada jantan berkisar dari 191,05-202,60 mm dan betina berkisar dari 179,56-198,50 mm. Rata-rata indeks kematangan gonad (IKG) tertinggi ditemukan pada jantan dan betina berturut turut 0,32 dan 2,07 selama musim pemijahanpada bulan November dan menurun hingga terendah pada bulan Februari. Fekunditas total berkisar dari 2.648-12.495 butir telur per individu.Ada korelasi positif antara fekunditas dengan panjang total dan bobot ikan.

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ASPEK BIOLOGI PERIKANAN IKAN LAYANG (Decapterus Macrosoma) YANG TERTANGKAP DENGAN BAGAN RAMBO DI PERAIRAN PANTAI SUMPANG BINANGAE KABUPATEN BARRU

JOURNAL OF INDONESIAN TROPICAL FISHERIES (JOINT-FISH) : Jurnal Akuakultur, Teknologi Dan Manajemen Perikanan Tangkap, Ilmu Kelautan ◽

10.33096/joint-fish.v4i1.85 ◽

2021 ◽

Vol 4 (1) ◽

pp. 12-21

Author(s):

Hasrun Abdullah ◽

Kasmawati Saleh

Keyword(s):

Sex Ratio ◽

Fish Species ◽

Economic Value ◽

Pelagic Fish ◽

Small Pelagic Fish ◽

Male And Female ◽

Flying Fish ◽

Biological Aspects ◽

First Maturity ◽

First Time

Flying fish is one of the dominant pelagic fish caught and has high economic value in Sumpang Binangae Waters. This fish is caught by many chart rambo fishing gear. The purpose of this study was to determine the biological aspects of flying fish especially those caught in the waters of Sumpang Binangae, Barru Regency. This research will be conducted for four months, from May 2020 to August 2020, which is located at the Sumpang binangae Fish Landing Base, Barru district. Identification of flying fish species is done visually by looking at the color and body shape and special characteristics based on the Guidelines for Practical Identification of Small Pelagic Fish Species in Figure, Suwarso, 2010, The composition of the type of catch is calculated based on the amount of catch (tonnes). Sex ratio, TKG, (Walpole 1993), Length of First-Time Gonads of Fish (Lm)The results showed that based on the composition of the types of fish caught, the percentage of the dominant catch was 27.41% mackerel (Rastrelliger kanagurta), 24.26% flying fish (Decapterus macrosoma), 23 anchovies (Stolephorus sp). 28%, squid (Loligo sp) by 2.24%, flying fish (Cypselurus sp) by 8.98% and tembang fish (Sardinella fimbriata) by 13%, while the type of flying fish caught was only one type, namely white-tailed flying fish. slightly yellowish (Decapterus macrosoma). Comparison of the number of male and female sex, it was found that the sex ratio of male and female Layang fish (D. macrosoma) was 52.83%: 47.17% or 1.12: 0.89, l. The size of the first maturity of male flying fish gonads in Barru waters is at the size of 15.68 cm or 156 mm and the female is at the size of 15.62 cm or 156 mm, while the male and female fish that are immature gonads are more than the fish that are mature gonads.

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Population and reproductive parameters of the red-tailed catfish, Phractocephalus hemioliopterus (Pimelodidae: Siluriformes), from the Xingu River, Brazil

Neotropical Ichthyology ◽

10.1590/1982-0224-20190015 ◽

2019 ◽

Vol 17 (2) ◽

Author(s):

Tiago Magalhães da Silva Freitas ◽

Luciano Fogaça de Assis Montag

Keyword(s):

Sex Ratio ◽

Amazon Basin ◽

Gonadosomatic Index ◽

Management Strategies ◽

Weight Ratio ◽

High Water ◽

Commercial Fish ◽

Xingu River ◽

Flood Period ◽

First Maturity

ABSTRACT A field study of the sex ratio, length-weight ratio, body size at first gonadal maturation, and the breeding season of the red-tailed catfish, Phractocephalus hemioliopterus, was carried out in the region of the middle Xingu River in the eastern Amazon basin. The fish were sampled quarterly from September 2012 to January 2014 using gillnets and long lines. The sex ratio was balanced, and while males and females were similar in standard length, the females were heavier than the males, on average. The males presented negative allometric growth, and the females, isometric growth. The estimated size at first maturity was 77.8 cm. The variation in the gonadosomatic index and the greater frequencies of mature specimens indicated a reproductive peak at the beginning of the high-water (flood) period. As P. hemioliopterus is an important commercial fish, our findings will contribute to the future development of effective conservation and management strategies, such as minimum catch size and a close season that is appropriate for the region. These data will also provide important insights for the evaluation of potential impacts on the biology of this fish resulting from the construction of Belo Monte dam.

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Reproduction of Celebes rainbowfish, Marosatherina ladigesi Ahl, 1936 in Pattunuang and Batu Puteh Rivers, South Sulawesi

Jurnal Iktiologi Indonesia ◽

10.32491/jii.v20i2.523 ◽

2020 ◽

Vol 20 (2) ◽

pp. 171

Author(s):

Adiara Firdhita Alam Nasyrah ◽

M.Fadjar Rahardjo ◽

Charles P.H. Simanjuntak

Keyword(s):

Sex Ratio ◽

Anthropogenic Activities ◽

Fish Population ◽

Red List ◽

Male Fish ◽

South Sulawesi ◽

Egg Diameter ◽

Somatic Index ◽

Destructive Fishing

Marosatherina ladigesi is one of endemic fishes in South Sulawesi and also as ornamental fish. Anthropogenic activities such as destructive fishing and degradation caused by the dredging of sand carried M. ladigesi to the red list of threatened IUCN category as vulnerable species. Accordingly, conservation efforts are needed to maintenance fish population in its habitat. The biologic information for conservation is reproduction of fishes. This research aimed to described reproduction of Celebes rainbow fish including sex ratio, gonad maturity, gonado-somatic index, fecundity, and distribution of egg diameter in Pattunuang and Batu Puteh Rivers, South Sulawesi. This research was conducted from May 2018 to April 2019. The result showed that the sex ratio in Pattunuang and Batu Puteh rivers were 1,00:1,60 and 1,00:1,08, respectively. This species spawned from the end of dry season to the early rainy season. Fecundity of fish in Pattunuang and Batu Puteh rivers were 22-795 eggs and 69-571 eggs, respectively. Based on distribution of egg diameter, Celebes rainbowfish categorized as total spawner. For the conservation of this species is recommended to catch restrictions in the spawning season and for male fish, and needs to be proposed the conservation in situ to determine both of rivers as reservoir area because these habitats are a source of germplasm.

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