scholarly journals Biologi Rajungan Ditinjau dari Aspek Morfometrik dan Sex Ratio yang Didaratkan di Perairan Rembang

2020 ◽  
Vol 9 (1) ◽  
pp. 65-74
Author(s):  
Muhammad Juli Hendra Putra ◽  
Subagiyo Subagiyo ◽  
Ria Azizah Tri Nuraini
Keyword(s):  
Sex Ratio ◽  
Conservation Management ◽  
Economic Value ◽  
Swimming Crab ◽  
Maturity Level ◽  
Portunus Pelagicus ◽  
Male And Female ◽  
Gonad Maturity ◽  
Total Female ◽  
The Village

ABSTRAK : Rajungan (Portunus pelagicus) memiliki nilai ekonomi tinggi, berbanding lurus dengan penangkapan yang meningkat. Tingkat pemanfaatan yang tidak konservatif akan mempengaruhi  ukuran dan kondisi rajungan di suatu populasi, serta stok rajungan di suatu perairan. Penelitian bertujuan untuk mengetahui kajian konservasi rajungan (Portunus pelagicus) berdasarkan morfometri dan sex ratio yang didaratkan oleh nelayan  di Perairan Desa Gegunung Wetan, Kecamatan Rembang, Kabupaten Rembang. Metode yang digunakan dalam penelitian bersifat deskriptif. Pengamatan rajungan dilakukan pada salah satu pengepul di Desa. Rajungan di amati berdasarkan morfometri dan sex rasio selama 30 hari. Hasil Informasi dapat dijadikan pedoman dalam menentukan kebijakan mengenai pengelolaan perikanan rajungan yang berkelanjutan dan bersifat konservatif. Hasil dari penelitian diketahui bahwa kelimpahan rajungan jantan sebesar 46% (1379 ekor) rajungan betina 56% (1621 ekor) dari 3000 ekor sampel rajungan. Rasio perbandingan jantan dan betina 1:1,18. Berdasarkan distribusi ukuran lebar karapas rajungan di perairan Rembang adalah berkisar anatara 72–167  mm dan distribusi berat sebesar 40–303 gram. Distribusi tingkat kematangan gonad pada perairan Rembang adalah 608 ekor pada TKG 1; 658 ekor pada TKG 2; dan 355 pada TKG 3. Data menunjukan bahwa pola pertumbuhan rajungan yang ada di perairan Rembang adalah allometrik negatif  baik rajungan jantan maupun rajungan betina. Abstract: Blue swimming crab (Portunus pelagicus) has a high economic value, directly proportional to the increased catch. The level of non-conservation utilization will affect the size and condition of the blue swimming crab in a population, as well as the blue swimming crab stock in a waters. This study is aimed to determine the blue swimming crab conservation study (Portunus pelagicus) based on morphometry and sex ratio brought by fishermen in the waters of Gegunung Wetan Village, Rembang District, Rembang Regency. The method used in this study is descriptive. Observation of blue swimming crab samples was carried out in one of the collectors in the village. Blue swimming crab was observed based on morphometry and sex ratio for 30 days. Informative results can be used as a guide in determining policies regarding sustainable and conservation management of blue swimming crab fisheries. The results of the study revealed that the abundance of male blue swimming crab was 46% (1379 male blue swimming crab) and the abundance of the female blue swimming crab was 56%  (1621 female blue swimming crab) of 3000 blue swimming crab samples. The ratio of male and female  is 1:1.18. Based on the size distribution of the width of the blue swimming crab carapace in the waters of Getanung Wetan it ranges from 72-167 mm and the distribution of weight is 40-303 grams. 13.8% (413 blue swimming crab) sized≤10 cm and 86.2% (2587 blue swimming crab) sized ≥10 cm. The distribution of gonad maturity level in the waters of Gegunung Wetan is 608 female blue swimming crab at TKG 1; 658 female blue swimming crab at TKG 2; and 355 female blue swimming crab at TKG 3. There were 355 female blue swimming crab (22%) of the total female blue swimming crab laying eggs. The data showed that the blue swimming crab growth pattern in Gegunung Wetan waters was negative allometric both male and female blue swimming crab.

scholarly journals Rasio Jenis Kelamin dan Tingkat Kematangan Gonad pada Rajungan (Portunus pelagicus) Linnaeus, 1758 (Malacostraca:Portunidae) yang Didaratkan di Kelurahan Pacar, Kabupaten Rembang

2020 ◽  
Vol 9 (1) ◽  
pp. 1-8
Author(s):  
Sri Devi Simanjuntak ◽  
Ervia Yudiati ◽  
Subagiyo Subagiyo
Keyword(s):  
Size Structure ◽  
Economic Value ◽  
Swimming Crab ◽  
Maturity Level ◽  
Chi Square ◽  
Portunus Pelagicus ◽  
Male And Female ◽  
Gonad Maturity ◽  
The Village ◽  
Swimming Crabs

ABSTRAK : Rajungan (Portunus pelagicus) memiliki nilai ekonomi tinggi, dimana berbanding lurus dengan penangkapan yang meningkat. Tingkat pemanfaatan yang tidak mengindahkan ukuran dan kondisi rajungan dapat mempengaruhi struktur ukuran dan stok rajungan di suatu perairan. Penelitian ini bertujuan untuk melakukan kajian morfometri, rasio jenis kelamin dan tingkat kematangan gonad rajungan yang didaratkan di Kelurahan Pacar, Kabupaten Rembang. Metode yang digunakan dalam penelitian bersifat deskriptif dan eksploratif. Pengamatan rajungan dilakukan pada salah satu pengepul di Kelurahan Pacar. Rajungan yang diteliti berdasarkan morfometri, rasio seksual dan tingkat kematangan gonad selama 30 hari. Informasi ini dapat dijadikan pedoman dalam menentukan kebijakan mengenai pengelolaan perikanan rajungan yang berkelanjutan. Hasil dari penelitian diketahui bahwa ratio kelimpahan rajungan jantan sebesar 45% (1342 ekor); rajungan betina 55% (1658 ekor) dari 3000 ekor sampel rajungan. Rasio perbandingan jantan dan betina 0,80:1 berdasarkan uji chi square. Berdasarkan distribusi ukuran lebar karapas rajungan di perairan Kelurahan Pacar adalah berkisar antara 60–179 mm dan distribusi berat sebesar 23–251 gram. Distribusi tingkat kematangan gonad pada perairan Kelurahan Pacar adalah 558 ekor pada TKG 1; 761 ekor pada TKG 2; dan 339 pada TKG 3. Data menunjukkan bahwa pola pertumbuhan rajungan yang ada di perairan Kelurahan Pacar adalah allometrik negatif yaitu pertumbuhan lebar karapas lebih cepat bertambah daripada berat tubuhnya baik rajungan jantan maupun rajungan betina.ABSTRACT : Blue swimming crab (Portunus pelagicus) has a high economic value, which is causing the crab catch to rise as well. The catch rate that does not consider the size and maturity of sea crab can affect the size structure and population stock of sea crab in waters. This research to study morphometry, sexual ratio and maturity level of the gonads landed in Pacar Village, Rembang Regency.The method used in this study descriptive and exsplorative. Observation of blue swimming crab samples was carried out in one of the collectors in the village. Blue swimming crab was observed based on morphometry and sexual ratio for 30 days. The results of the study revealed that the abundance of male blue swimming crab was 45% (1342 male blue swimming crabs) and the abundance of the female blue swimming crabs was 55%  (1658 female blue swimming crabs) of 3000 blue swimming crab samples. The ratio of male and female   0.80 ; 1 based on the chi square. Based on the size distribution of the width of the blue swimming crab carapace in the waters of Pacar Village it range from 60-179 mm and the distribution of weight 23-251 grams. The distribution of gonad maturity level in the waters Pacar Village is 558 female blue swimming crab at TKG 1; 761 female blue swimming crab at TKG 2; and 339 female blue swimming crab at TKG 3. Data is showed that the blue swimming crab growth pattern in Pacar Village waters was negative allometric both male and female blue swimming crab.

scholarly journals Kajian Tingkat Kerentanan Rajungan (Portunus pelagicus) di Perairan Desa Tunggulsari Kabupaten Rembang

2021 ◽  
Vol 10 (1) ◽  
pp. 147-157
Author(s):  
Parameswari Iccha Nirmalabuddhi Wishnuputri ◽  
Sri Redjeki ◽  
Retno Hartati
Keyword(s):  
Water Quality ◽  
Growth Pattern ◽  
Economic Value ◽  
Quality Parameters ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Male And Female ◽  
Over Exploitation ◽  
The Village ◽  
Swimming Crabs

Rajungan (Portunus pelagicus) adalah salah satu sumber daya hayati laut Indonesia. Rajungan merupakan komoditas utama  perikanan di Indonesa, baik untuk lokal maupun ekspor. Nilai ekonomis rajungan yang tergolong tinggi mengakibatkan penangkapan rajungan dilakukan secara besar-besar dan dapat memicu terjadinya kepunahan. Penelitian bertujuan untuk mengetahui tingkat kerentanan rajungan di Perairan Desa Tunggulsari dan mengetahui karakteristik morfometri dari rajungan yang ditangkap pada lokasi tersebut. Metode yang digunakan dalam penelitian ini adalah metode Productivity and Susceptibility Analysis (PSA). Wawancara dilakukan kepada 60 nelayan di Desa Tunggulsari. Pengukuran parameter kualitas perairan meliputi suhu, oksigen terlarut, salinitas, dan pH. Pengukuran morfometri dilakukan pada salah satu pengepul di desa. Hasil dari wawancara diketahui bahwa nelayan di Desa Tunggulsari menggunakan 2 macam alat tangkap yaitu bubu lipat dan jaring insang dasar. Penilaian atribut produktivitas rajungan masuk dalam kategori tinggi, sedangkan penilaian atribut kerentanan tergolong pada resiko rendah untuk penggunaan kedua alat tersebut. Nilai MSC untuk alat tangkap bubu lipat adalah 96,0 dan 98,2 untuk alat tangkap jaring insang dasar. Nilai MSC > 80 menunjukkan bahwa tingkat kerentanan rajungan pada lokasi tersebut masuk pada kategori rendah. Selanjutnya, pola pertumbuhan rajungan di Desa Tunggulsari adalah allometrik negatif baik untuk rajungan jantan maupun betina. Hal ini menunjukkan pertumbuhan panjang dan lebar karapas lebih cepat dibandingkan penambahan berat rajungan. The blue swimming crab (Portunus pelagicus) is one of the Indonesian marine biological resources. The blue swimming crab is a main commodity of fisheries in Indonesia, both for local and export. Economic value of blue swimming crab classified as high involve over-exploitation of blue swimming crab and can lead to extinction. This research is aimed to determine level of vulnerability of blue swimming crab in Tunggulsari waters and to discover morphometry characteristic of blue swimming crab that caught at that location. The method used in this research is Productivity and Susceptibility (PSA) method. Interviews were conducted with 6 fishermen in the village of Tunggulsari. Measurement of water quality parameters including temperature, dissolved oxygen, salinity, and pH. Morphometry measurement was carried out in one of the collectors in the village. The results of the interview revealed that fishermen in the village of Tunggulsari used 2 fishing tools namely bubu lipat and bottom set gillnet. Assessment of blue swimming crab productivity attributes is included in the high category, while the assessment of vulnerability attributes is classified as low risk for the use of both tools. The MSC value for bubu lipat is 96,0 and 98,2 for bottom set gillnet. The MSC value is more than 80 indicates that the level of blue swimming crab vulnerability at that location is in the low category. Further, blue swimming crab growth pattern in the village of Tunggulsari are negative allometrics for both male and female blue swimming crabs. This shows the growth in length and width carapace is faster than the addition of blue swimming crab weight.

scholarly journals Stock Status of Blue Swimming Crab (Portunus pelagicus Linnaeus, 1758) in Tiworo Strait Waters, Southeast Sulawesi, Indonesia

2020 ◽  
Vol 25 (2) ◽  
pp. 85-90
Author(s):  
Yustika Permatahati Intan Permatahati ◽  
Nila Nikmatia Bugis ◽  
La Sara ◽  
Tezza Fauzan Hasuba Hasuba
Keyword(s):  
Carapace Width ◽  
Growth Patterns ◽  
Fishing Ground ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Male And Female ◽  
Gonad Maturity ◽  
Stock Status ◽  
Spawning Potential Ratio ◽  
Very High

The blue swimming crab (BSC) fishery in Tiworo Strait has been heavily exploited since two decades ago when its worldwide demand and price was very high. Study on population aspects of this organism in this waters is limited. The aim of present study was to investigate growth patterns, population stock status, and size at first gonad maturity of Portunus pelagicus. One of the main fishing ground of BSC around Tiworo Strait waters is at Bangko and Gala Islands. Samples of BSC were taken monthly using gillnet and collapsible trap. Each sample taken was identified its sex, measured its carapace width, and weighed. Data collected from fishing ground of BSC were analyzed to find out growth patterns, population stock status using spawning potential ratio (SPR) method, and the first gonad maturity (CW50). The results of study showed that growth patterns of BSC male and female following isometric growth patterns (b=0) (P<0.05). It was found out that SPR of BSC from both fishing ground was 22.46% and 23.71%, respectively which indicates that population stock status of BSC in Tiworo strait waters is “moderate level” (SPR > 20%). The size at first gonad maturity (CW50) was attained at carapace width of 9.16 cm for male and 10.16 cm for female. Those imply that BSCs allowed to be caught should be >10 cm. 

Kajian Morfometri dan Tingkat Kematangan Gonad Rajungan di Perairan Betahwalang, Demak

2021 ◽  
Vol 10 (2) ◽  
pp. 175-183
Author(s):  
Iqbal Maulana ◽  
Irwani Irwani ◽  
Sri Redjeki
Keyword(s):  
Time Series ◽  
Size Structure ◽  
Growth Parameters ◽  
Carapace Width ◽  
Economic Value ◽  
Survey Method ◽  
Swimming Crab ◽  
Female Crab ◽  
Portunus Pelagicus ◽  
Gonad Maturity

Rajungan (Portunus pelagicus) merupakan komoditas laut yang memiliki nilai ekonomis yang tinggi, dimana berbanding lurus dengan penangkapan yang terus meningkat. Tingkat pemanfaatan yang tidak mengindahkan ukuran dan kondisi rajungan dapat mempengaruhi struktur ukuran dan stok rajungan di suatu perairan. Penelitian ini bertujuan untuk mengetahui distribusi ukuran, hubungan lebar dan berat rajungan serta distribusi tingkat kematangan gonad (TKG) di perairan Betahwalang, Demak. Penelitian menggunakan metode survey dengan analisis yang bersifat deskriptif yang dilakukan secara “time-series”. Pengamatan sampel rajungan sebesar 10% dari hasil tangkapan yang didaratkan oleh setiap nelayan di pengepul rajungan.. Hasil dari penelitian ini menujukkan dari 3030 ekor rajungan yang diamati diketahui distribusi lebar karapas rajungan berkisar antara 35 – 185 mm dan kisaran berat sebesar 10 – 350 gram. Rajungan yang terdapat di perairan Betahwalang memiliki pertumbuhan yang bersifat allometrik positif pada rajungan jantan dan betina pada bulan Januari serta Februari.  Hasil nilai b sebesar 3,29 dan 3,08 (Januari & Februari) pada rajungan jantan. Nilai b sebesar 3,10 dan 3,15  pada rajungan betina (Januari & Februari) serta nilai b sebesar 3,14 pada keseluruhan rajungan. Sehingga diketahui pertumbuhan lebar karapas lebih cepat dibandingkan bobot rajungan. Sedangkan distribusi tingkat kematangan gonad rajungan betina adalah 21% pada TKG 1; 63% pada TKG 2; serta 16% pada TKG 3, dengan ukuran pertama kali matang gonad adalah 141,51 mm. Blue swimming crab (Portunus pelagicus) is a marine commodity has a high economic value , which is causing the crab catch to rise as well. The catch rate that does not consider the size and maturity of sea crab can affect the size structure and population stock of sea crab in waters. This study aims to determine the size distribution,the relationship of width and weight of Blue swimming crab and distribution of gonad maturity in Betahwalang, Demak. There’s a descriptive survey method used in this study with time-series observations. The sample size is about 10% of the total number landed crab from each fisherman. The results of this study showed that from 3030 crabs observed, the distribution of crab carapace width ranged from 35 – 185 mm and the weight range at 10 – 350 gram. The results showed the all crabs has a positive allometric on growth parameters. The value of  b 3,29 and 3,08 (January & February) in male blue swimming crab, 3.10 and 3.15 (January & February) on female sea crabs, and 3.14 on whole sea crabs. So it is known that the growth of carapid width is faster than the weight of crab. While the distribution of female crab gonad maturity level is 21% in level 1; 63% in level 2; and 16% in level 3, with the first size of mature gonad at 141,51 mm.

scholarly journals ANALISA ASPEK REPRODUKSI IKAN TOMAN (Channa micropeltes) DI SUNGAI BELIDA KABUPATEN MUARA ENIM

2020 ◽  
Vol 8 (1) ◽  
pp. 12-21
Author(s):  
Danang Yonarta ◽  
Yulisman Yulisman ◽  
Riswandi Riswandi
Keyword(s):  
Sex Ratio ◽  
Time Interval ◽  
Maturity Level ◽  
Female Fish ◽  
Natural Conditions ◽  
Male And Female ◽  
Gonad Maturity ◽  
Fish Resources ◽  
Gonadal Maturity ◽  
Abundant Population

Management of snakehead fish resources in swamp waters need to be done to anticipate a decline in stock in the waters. At this time the area where snakehead fish still have an abundant population is in southern sumatera, precisely in the Belida River, Muara Enim Regency. Until now there has been no information regarding the reproductive aspects of snakehead fish, their location and spawning season. The purpose of this study was to obtain information about the reproductive aspect of snakehead fish which includes sex ratio, gonad maturity level. Gonad maturity index and egg fecundity. The research was conducted in September-December 2019. The location was determined based on the natural conditions of the Belida River and human activities. Fish sampels were caught using experimental gill nets with ½ mash net size. Sampling of fish is done every 4 months with a time interval of once a month. The resuls of study in the male and female fish ratio 1,6:1. This ratio consisted of 109 fish (62,3%) and 66 female fish (37,7%). Gonadal maturity indeks  for male snakehead fish ranged from 0,21 to 0,86, while female snakehead fish ranged from 1,18 to 2,30. snakehead fish egg fecundity were 24.786 eggs with a diameter of 2,20 – 2,51

scholarly journals Biomorphometry of coconut crabs (Birgus latro) in Laigoma Island, North Maluku, Indonesia

2021 ◽  
Vol 890 (1) ◽  
pp. 012065
Author(s):  
Suryani ◽  
M S Widodo ◽  
U Yanuhar ◽  
A Suprijanto
Keyword(s):  
Sex Ratio ◽  
Carapace Width ◽  
Maturity Level ◽  
Ratio Distribution ◽  
Spawning Period ◽  
Male And Female ◽  
Gonad Maturity ◽  
Native Habitat ◽  
The Relationship ◽  
Land Clearance

Abstract Coconut crab is a coastal animal that lives in costal forest on islands of tropical Indo-Pacific. Crab populations are currently under threat of extinction. Several issues contribute to this, including high levels of exploitation, degradation of their native habitat, land clearance, and plantations development. This study aimed to examine the biomorphometric of coconut crabs, which includes the composition, sex ratio, distribution, widht and weight relation, condition factors and gonad maturity level. The descriptive explorative methods was used in this research. The results showed that the composition of 156 coconut crabs consisted of 82 females. The results obtained a balanced sex ratio. The size of the carapace width obtained ranged from 40.15 to 88.55 mm, with a weight of 150-565 grams. The relationship between width and capacity is allometric. The values obtained from these factors ranged from 1.01 to 1.03 for men and 1.01 to 1.012 for females. The gonad maturity level of male and female mud crabs was dominated by TKG III and IV. This indicated that the research time was in spawning period.

scholarly journals Reproductive Snakehead Fish (Channa striata Bloch, 1793) in Swamps Waters

2021 ◽  
Vol 328 ◽  
pp. 08013
Author(s):  
Sunarni Sunarni ◽  
Sisca Elviana ◽  
Stenly M B S Wairara
Keyword(s):  
Data Analysis ◽  
Sex Ratio ◽  
Maturity Level ◽  
Male And Female ◽  
Gonad Maturity ◽  
Channa Striata ◽  
First Time ◽  
Fish Gonads

The purpose of this study was to determine the reproduction of Snakehead fish (Channa striata Bloch, 1793) in the waters of the Merauke district wasur swamp. The data analysis used was the sex ratio, the level of gonad maturity, and the first size of gonad maturity. The results showed that the sex ratio of male and female snakehead fish in October and November at stations I and II tended to be balanced, while in September the sex ratio of snakehead fish at station I was balanced and at station II was not balanced. The maturity level of snakehead fish gonads at TKG III in September was around 35.48%, in October 28.57% and 15.38% in November. The size of the first time the gonads were ripe, the results showed that the first time the fish were ripe, the gonads were 190 mm long and weighing 50.3 g.

scholarly journals Distribution and Size of Crab (Portunus pelagicus) in Betahwalang Waters, Demak, Central JavaSex Ratio, Size Distribution and Length-Weight Relationship of Portunus pelagicus Linnaeus, 1758 (Malacostraca : Portunidae) in Betahwalang, Demak, Central Java

2021 ◽  
Vol 24 (1) ◽  
pp. 133-140
Author(s):  
Sri Redjeki ◽  
Muhammad Zainuri ◽  
Ita Widowati ◽  
Ambariyanto Ambariyanto ◽  
Rudhi Pribadi ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Sex Ratio ◽  
Size Distribution ◽  
Growth Parameters ◽  
Carapace Width ◽  
The Body ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Male And Female

Blue Swimming Crab (P. pelagicus, Linnaeus, 1758) is the main fisheries product from Betahwalang peoples. Fishing activity of Blue Swimming Crab by the fisherman almost every day in Betahwalang waters. Distribution and body size data of Blue Swimming Crab can be used for sustain management reference. The purpose of this study was to determine distribution pattern and body size of Blue Swimming Crab, started from July to November 2018 in Betahwalang waters, Demak. The data analyze consist of sex ratio, carapace width distribution and relationship between carapace width and body weight. 11790 samples Blue Swimming crab from Betahwalang waters consist of 7070 female crabs and 4720 male crabs. The result showed that sex-ratio between male and female crabs are balanced (1.0:1.37), with the most female crabs found at July and August. Body size distribution of male and female crabs are dominated in class 103-111 mm carapace width. Male and female crabs have a positive allometric on growth parameters, that means growth of the body weight is faster than carapace width. The result showed that Blue Swimming Crab in Betahwalang waters are support for sustainable fisheries. 

scholarly journals ASPEK REPRODUKSI DAN UMUR IKAN EKOR KUNING (Caesio cuning) YANG DI DARATKAN DI PELABUHAN PERIKANAN NUSANTARA SUNGAILIAT KABUPATEN BANGKA

2019 ◽  
Vol 4 (2) ◽  
pp. 193-207
Author(s):  
Nirmala Sari ◽  
Okto Supratman ◽  
Eva Utami
Keyword(s):  
Sex Ratio ◽  
Random Sampling ◽  
Sustainable Management ◽  
Sampling Method ◽  
Economic Value ◽  
The Body ◽  
Maturity Level ◽  
Gonad Maturity ◽  
Gonad Somatic Index ◽  
Somatic Index

Ikan ekor kuning (Caesio cuning) salah satu jenis ikan karang dari famili Caesionidae, yang menjadi target penangkapan dengan bubu di Pelabuhan Perikanan Nusantara Sungailiat. Ikan ekor kuning memiliki nilai ekonomis penting. Informasi tentang aspek reproduksi ikan ekor kuning (Caesio cuning) diperlukan untuk pengelolaan yang berkelanjutan. Penelitian ini bertujuan untuk mengetahui aspek reproduksi ikan ekor kuning pada bulan Januari sampai Maret yang meliputi Rasio Kelamin (sex ratio), Tingkat Kematangan Gonad (TKG), Indeks Kematangan Gonad (IKG), Fekunditas, dan menganalisis umur ikan. Pengambilan sampel dilakukan pada bulan Januari sampai Maret 2019 di Pelabuhan Perikanan Nusantara Sungailiat dengan menggunakan metode random sampling. Hasil penelitian selama tiga bulan ini menunjukkan bahwa nilai rasio kelamin ikan ekor kuning jantan dan betina yaitu 1:1,032 yang berada pada tingkat kematangan I sampai dengan tingkat kematangan gonad IV. Nilai IKG ikan ekor kuning jantan berkisar antara 0,014% - 4,712% dan untuk betina antara 0,014% - 7,784%. Fekunditas ikan ekor kuning betina berkisar antara 5.523 – 49.987 butir dan memiliki umur 1 tahun dan 2 tahun, dimana panjang tubuh ikan sangat mempengaruhi umur ikan.REPRODUCTIVE ASPECTS AND AGE OF YELLOW-TAILED FISH (Caesio Cuning) LANDED AT SUNGAILIAT ARCHIPELAGO FISHING PORT IN BANGKA REGENCY. Reproductive aspects of yellow-tailed fish which are landed in the Pelabuhan Perikanan Nusantara Sungailiat in Bangka Regency. Yellow-tailed fish (Caesio cuning) is one type of reef fish from the Caesionidae family, which is the target of catching fish at the Pelabuhan Perikanan Nusantara Sungailiat. Yellow tail fish has important economic value. Information about the reproductive aspects of yellow tail fish (Caesio cuning) is  needed for sustainable management. This study aims to determine the reproductive aspects of yellow tailed fish from January to March which include sex ratio, gonad maturity level, gonad somatic index, fecundity, and analyze the age of fish. Sampling was carried out from January to March 2019 at the Pelabuhan Perikanan Nusantara Sungailiat used the random sampling method. The results of this three-month study showed that the sex ratio of yellow-tailed fish male and female were 1: 1,032 which at the level of maturity I to the level of gonad maturity IV. The value of GSI male yellow-tailed fish ranges from 0.014% - 4.712% and females between 0.014% - 7.784%. The fecundity of female yellow-tailed fish ranges from 5,523 - 49,987 grains and yellow-tailed fish has age 1 year and 2 years, where the body length of fish greatly affects the age of fish.

scholarly journals Biology Reproduction and Dynamic of Gonads Maturity Blue Swimming Crabs (Portunus pelagicus) in Betahwalang Waters, Demak

2020 ◽  
Vol 23 (3) ◽  
pp. 357-361
Author(s):  
Sri Redjeki ◽  
Muhammad Zainuri ◽  
Ita Widowati ◽  
Abdul Ghofar ◽  
Elsa Lusia Agus ◽  
...  
Keyword(s):  
Active Management ◽  
Maturity Level ◽  
Portunus Pelagicus ◽  
Gonad Maturity ◽  
Descriptive Research ◽  
Fisheries Resources ◽  
Gonadal Maturity ◽  
Level Ii ◽  
Total Female ◽  
Level I

The waters of Betahwalang, Demak has quite potential fisheries resources. For the sustainability of crab resources, active management is necessary applied. Information on biology reproduction of crabs is required. The purpose of this research was to determine the biological aspects of sex ratio and the dynamics of the gonadal maturity level. This research was conducted on September-November 2018 in Betahwalang Waters. The method used in this study is a descriptive research method. Data were collected by determining gender, weight and width of the carapace, the level of gonadal maturity. The results from observations of crab landed with a total of 6,292 crabs showed a percentage of 37.30% males and 62.70% females with sex ratios in September (1: 1.70), October, (1: 1.46), and November (1: 1.98). The observation of gonadal maturity level in September (Level I 162 crabs, Level II 1425 crabs, Level III 607 crabs) in October (Level I 130 crabs, Level II 832 crabs, Level III 207 crabs), and in November (Level I 46 crabs, Level II 753 crabs, Level III 195 crabs). The results show that the average crab catch on Betahwalang waters is dominated by the gonad II maturity level reaching (> 70%) of the total female caught. The results of the gonad maturity level are influenced by weather and season factors where the trend of the gonad maturity level will drop in the rainy season or in November.    

Sign in / Sign up

Export Citation Format

Share Document