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 Native Species in Barito Upstream at South Kalimantan, Indonesia: Sex Ratio and Length-Weight Relationship of Seluang Batang Fish (Rasbora argyrotaenia Blkr 1850)

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Erwin Rosadi ◽  
Endang Yuli H. ◽  
Daduk Satyohadi ◽  
Gatut Bintoro
Keyword(s):  
Sex Ratio ◽  
Native Species ◽  
Scientific Data ◽  
Time Interval ◽  
Female Fish ◽  
Male And Female ◽  
Weight Relationship ◽  
Intensive Exploitation ◽  
Chi Square Analysis ◽  
Relationship Of

<p>Freshwater potential in South Kalimantan is one million hectares and 140 species of fish are exploited. One of the fish resources in the intensive exploitation in South Kalimantan is Seluang Batang fish (<em>Rasbora argyrotaenia</em>). The purpose of this study was to obtain scientific data related to the sex ratio of fish and length-weight relationships of <em>R. argyrotaenia</em> in Barito upstream at South Kalimantan. The study was conducted in the Barito upstream in South Kalimantan, on location 2<sup>o</sup>57'36.10'' S 114<sup>o</sup>5'37.92'' E; 3<sup>o</sup>01'07.86" S 114<sup>o</sup>45'29.28'' E. Taking of samples by the method of Ford-Walford plot lasts for one year with a fixed time interval decision which is one month. Data obtained by comparing the sex ratio between the number of male fish with the number of females and multiplied by 100%. To test the hypothesis difference in the number of male and female fish used chi-square analysis of the end. Analysis of length-weight relationship of fish with regression test and were calculated using a cubic pattern. The results showed that the ratio of fish <em>R. argyrotaenia</em> male and female is 3: 1 and the growth pattern of male and female fish are negative allometric.</p>

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 REPRODUCTIVE BIOLOGY OF POKEA CLAM Batissa violacea var. celebensis, VON MARTENS 1897 AT LASOLO ESTUARY, SOUTHEAST SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 9-18
Author(s):  
. Bahtiar
Keyword(s):  
Sex Ratio ◽  
Quantitative Description ◽  
Female Gonad ◽  
Reproductive Pattern ◽  
Maturity Stage ◽  
Chi Square ◽  
Male And Female ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Traditional Fishing

Pokea clam Batissa violacea var. celebensis von Martens 1897 that inhabits the substrates of some estuaries in Southeast Sulawesi has a tendency to have different reproductive pattern. The aim of this study was to determine the sex ratio, gonadal maturity stage (TKG), gonadal maturity index (IKG) and the size at first gonad maturity of pokea in Lasolo estuary, Southeast Sulawesi.  Samples were randomly collected using a traditional fishing gear called tangge.  Sex ratio, TKG, IKG, and the size at first gonad maturity were determined using standard methods and formulas and then analyzed using Chi Square, quantitative description and non-linear regression. The results showed that the number of males were higher than the numbers of females, ranging from 71.85-89.84% and 10.16-28.15%, respectively.  Gonadal maturity development of male and female occured simultaneously. Early gonadal maturity stage began in January.  Spawning occurs twice, beginning with maturity in April and spawning in May and then again maturity in July and spawning in July until October.  IKG values of male and female were relatively the same ranging from 2.56-31.92. The males matured earlier than the females at size 1.95 cm and 2.15 cm, respectively.   Keywords: female, gonad, male, clam, maturity, spawning

scholarly journals Biologi reproduksi ikan layur, Trichiurus lepturus Linnaeus, 1758 di perairan pantai Kabupaten Bantul

2018 ◽  
Vol 17 (2) ◽  
pp. 227
Author(s):  
Praditha Novianingrum ◽  
Djumanto Djumanto ◽  
Murwantoko Murwantoko ◽  
Eko Setyobudi
Keyword(s):  
Sex Ratio ◽  
Length Distribution ◽  
Fish Length ◽  
Maturity Stage ◽  
Oocyte Diameter ◽  
Maturity Level ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Trichiurus Lepturus ◽  
Fish Samples

Largehead hairtail (Trichiurus lepturus) is one commodity fish catches with high production and value in Yogyakarta. The purpose of this research is to analyse reproductive aspects of this fish in coastal area of Bantul Regency. Yogyakar-ta. Those aspects are gonadal maturity level, fecundity, and the length at the first gonadal maturity. Fish samples are taken from the catch of fisherman using gillnet with a mesh sizes of 1.75 and 2 inches in the coastal fishing port of Depok and Samas. The fish collected from January to April 2016 with at least 30 individuals every two weeks. The samples are identified to find their sex and measured to know the length, weight, and gonadal maturity level (TKG). The data analyzed include length distribution, weight, sex ratio, gonadosmoatic index, length at the first gonadal maturity (Lm), fecundity and oocyte diameter. The result shows the fish length varies between 52.8 and 86.2 cm, and weight 115 and 567.2 g. The sex ratio between male and female was 1:0.6. Gonad maturity stage II and III are found every month observation while gonad maturity stage IV found in April. Oocyte diameter in the stage of gonadal ma-turity IV was 0.35-1.02 mm, there were two distribution modus so that the spawning expected partial spawner with fec-undity of 24.601 eggs with range was 12.873-33.534 eggs. Fecundity increased as parent’s body length with equation F= 0,434L2.60. Hairtail expected reaching the length of the first gonadal maturity in 65.55 cm, higher than the average captured, namely 63.4 cm. AbstrakIkan layur (Trichiurus lepturus) merupakan salah satu komoditas hasil tangkapan ikan di Daerah Istimewa Yogyakarta dengan jumlah produksi dan nilai yang tinggi. Penelitian ini bertujuan untuk mengkaji aspek reproduksi yang meliputi: tingkat kematangan gonad, fekunditas, dan ukuran ikan kali pertama matang gonad layur di perairan pantai Kabupaten Bantul, Daerah Istimewa Yogyakarta. Sampel ikan dikumpulkan dari hasil tangkapan nelayan yang menggunakan jaring insang dengan ukuran mata jaring 1,75 dan 2 inci di Tempat Pelelangan Ikan Depok dan Samas. Pengumpulan sampel ikan dilakukan pada bulan Januari hingga April 2016 setiap dua minggu sekali minimal 30 ekor. Sampel ikan diidentifikasi jenis kelamin, diukur panjang, bobot tubuh, bobot gonad, dan tingkat kematangan gonad (TKG). Data yang dianalisis meliputi sebaran panjang, bobot, nisbah kelamin, indeks kematangan gonad, ukuran ikan kali pertama matang gonad (Lm), fekunditas, dan diameter telur. Hasil pengamatan menunjukkan kisaran panjang ikan 52,8-86,2 cm dan bobot 115-567,2 g, nisbah betina dan jantan sebesar 1 : 0,6. TKG II dan III ditemukan pada setiap bulan pengamat-an sedangkan TKG IV banyak ditemukan pada bulan April. Diameter telur ikan TKG IV berkisar 0,35-1,02 mm, terda-pat dua modus persebaran sehingga pemijahan diduga bertahap dan fekunditas sebanyak 24.601 butir dengan kisaran 12.873-33.534 butir. Fekunditas meningkat seiring panjang tubuh induk dengan persamaan F = 0,434L2,60. Ukuran ikan layur kali pertama matang gonad diperkirakan pada panjang 65,55 cm, lebih panjang daripada ukuran rata-rata tertangkap, yaitu pada 63,4 cm.

scholarly journals REPRODUCTIVE BIOLOGY OF POKEA CLAM Batissa violacea var. celebensis, VON MARTENS 1897 AT LASOLO ESTUARY, SOUTHEAST SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
. Bahtiar
Keyword(s):  
Sex Ratio ◽  
Reproductive Pattern ◽  
Maturity Stage ◽  
Fishing Gear ◽  
Chi Square ◽  
Male And Female ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Traditional Fishing ◽  
Number Of Males

<p><em>Pokea</em><em> clam</em><em> </em><em><span style="text-decoration: underline;">Batissa</span></em><em> <span style="text-decoration: underline;">violacea</span> var. celebensis von Martens 1897 </em><em>that inhabits the substrates of some estuaries in Southeast Sulawesi has a tendency to have differ</em><em>ent</em><em> reproductive pattern. The aim of this study was to determine the sex ratio, gonadal maturity stage (TKG), gonadal maturity index (IKG) and the size at first gonad maturity of </em><em>p</em><em>okea in Lasolo estuary, Sout</em><em>h</em><em>east Sulawesi.  Samples were randomly collected using a traditional fishing gear called tangge.  Sex ratio, TKG, IKG, and the size at first gonad maturity were </em><em>determined </em><em>using standard </em><em>methods and </em><em>formulas and then analyzed using Chi Square, </em><em>q</em><em>uantitative description and non-linear regression. The results showed that the number of males were higher than the number<span style="text-decoration: line-through;">s</span> of females, ranging from </em><em>71.85-89.84% </em><em>and</em><em> 10.16-28.15%</em><em>, respectively.  Gonadal maturity development of male and female occured simultaneously. Early gonadal maturity stage began in January.  Spawning occurs twice, beginning with maturity in April and spawning in May and then again maturity in July and spawning in July until October.  IKG values of male and female were relatively the same ranging from </em><em>2.56-31.92</em><em>. The males matured earlier than the females at size 1</em><em>.</em><em>95 cm and 2</em><em>.</em><em>15 cm, respectively.  </em></p><p><em> </em></p><p><strong><em>Keywords:</em></strong><em> </em><em>female</em><em>, </em><em>gonad, male,</em><em> </em><em>clam,</em><em> </em><em>maturity, spawning</em></p>

scholarly journals Characteristics of Reproduction of Yellowstripe Scad Selaroides leptolepis (Cuvier, 1833) In Manado Bay Waters

2018 ◽  
Vol 6 (2) ◽  
pp. 46
Author(s):  
Febrina Sinaga ◽  
Ferdinand F Tilaar ◽  
Nego E Bataragoa
Keyword(s):  
Sex Ratio ◽  
Growth Pattern ◽  
Maturity Level ◽  
Female Fish ◽  
Chi Square ◽  
Male And Female ◽  
Random Draw ◽  
First Maturity ◽  
First Time ◽  
Size At First Maturity

The waters of Manado Bay are areas that have a lot of biological resources. One of these resources is Yellowstripe scad (Selaroides leptolepis). The research was aimed to find out the reproduction characteristics of  Yellowstripe scad (Selaroides leptolepis) by looking at male and female sex ratio, growth pattern with male and female condition factor, maturity level of gonad (TKG), gonad maturity index (IKG), size at first maturity, and fecundity. The location of fish sampling is taken from the catch of fishermen in Manado Bay waters in not April-May 2018. Fish sampling using random draw method withdrawal. The number of samples is 200, taken four times in two months (April to May 2018). The sex ratio of Yellowstripe scad (Selaroides leptolepis) in the waters of Manado Bay is balanced. The growth pattern of male is positive allometric, while females is isometric. The condition of male and female fish are 0.9 and 1.3 respectively.  The Yellowstripe scad breeding season in Manado Bay waters takes place after the fourth week in April. The size of the first time ripe gonad Yellowstripe scad male and female 189 mm. The fecundity ranged from 1,960 - 29,145 with an average of 11,716 ± 6,088.Keywords: Yellowstripe scad, reproductive biology, Manado Bay ABSTRAKPerairan Teluk Manado adalah perairan  yang memiliki sumberdaya hayati cukup banyak. Salah satu sumberdaya di perairan tersebut yaitu ikan Selarkuning (Selaroides leptolepis). Penelitian itu bertujuan untuk mengetahui karakteristik reproduksi ikan Selarkuning (Selaroides leptolepis) dengan melihat dari rasio kelamin jantan dan betina, pola pertumbuhan dengan faktor kondisi pada jantan dan betina, tingkat kematangan gonad (TKG), indeks kematangan gonad (IKG), ukuran pertama kali matang gonad, dan fekunditas.       Sampel ikan diambil dari hasil tangkapan nelayan di perairan Teluk Manado pada bulan April-Mei 2018. Pengambilan sampel ikan menggunakan metode penarikan secara acak berlapis.  Jumlah sampel sebanyak 200 ekor, diambil empat kali dalam dua bulan. Berdasarkan uji Chi-square, rasio kelamin ikan Selarkuning (Selaroides leptolepis) di perairan Teluk Manado adalah seimbang. Pola pertumbuhan ikan Selarkuning yaitu bersifat allometrik positif, sedangkan betina bersifat isometrik dengan rata-rata faktor kondisi ikan jantan dan betina mencapai 0,9 dan 1,3. Musim pemijahan ikan Selarkuning di perairan Teluk Manado berlangsung setelah minggu keempat pada bulan April. Ukuran pertama kali matang gonad ikan Selarkuning jantan dan betina 189 mm. Fekunditas ikan Selarkuning berkisar antara 1.960 – 29.145 butir dengan rata-rata 11.716 ± 6.088.Kata kunci: ikan Selarkuning,biologi reproduksi, Teluk Manado

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 Biologi reproduksi ikan layur, Trichiurus lepturus Linnaeus, 1758 di perairan pantai Kabupaten Bantul

2018 ◽  
Vol 17 (2) ◽  
pp. 227
Author(s):  
Praditha Novianingrum ◽  
Djumanto Djumanto ◽  
Murwantoko Murwantoko ◽  
Eko Setyobudi
Keyword(s):  
Sex Ratio ◽  
Length Distribution ◽  
Fish Length ◽  
Maturity Stage ◽  
Oocyte Diameter ◽  
Maturity Level ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Trichiurus Lepturus ◽  
Fish Samples

Largehead hairtail (Trichiurus lepturus) is one commodity fish catches with high production and value in Yogyakarta. The purpose of this research is to analyse reproductive aspects of this fish in coastal area of Bantul Regency. Yogyakar-ta. Those aspects are gonadal maturity level, fecundity, and the length at the first gonadal maturity. Fish samples are taken from the catch of fisherman using gillnet with a mesh sizes of 1.75 and 2 inches in the coastal fishing port of Depok and Samas. The fish collected from January to April 2016 with at least 30 individuals every two weeks. The samples are identified to find their sex and measured to know the length, weight, and gonadal maturity level (TKG). The data analyzed include length distribution, weight, sex ratio, gonadosmoatic index, length at the first gonadal maturity (Lm), fecundity and oocyte diameter. The result shows the fish length varies between 52.8 and 86.2 cm, and weight 115 and 567.2 g. The sex ratio between male and female was 1:0.6. Gonad maturity stage II and III are found every month observation while gonad maturity stage IV found in April. Oocyte diameter in the stage of gonadal ma-turity IV was 0.35-1.02 mm, there were two distribution modus so that the spawning expected partial spawner with fec-undity of 24.601 eggs with range was 12.873-33.534 eggs. Fecundity increased as parent’s body length with equation F= 0,434L2.60. Hairtail expected reaching the length of the first gonadal maturity in 65.55 cm, higher than the average captured, namely 63.4 cm. AbstrakIkan layur (Trichiurus lepturus) merupakan salah satu komoditas hasil tangkapan ikan di Daerah Istimewa Yogyakarta dengan jumlah produksi dan nilai yang tinggi. Penelitian ini bertujuan untuk mengkaji aspek reproduksi yang meliputi: tingkat kematangan gonad, fekunditas, dan ukuran ikan kali pertama matang gonad layur di perairan pantai Kabupaten Bantul, Daerah Istimewa Yogyakarta. Sampel ikan dikumpulkan dari hasil tangkapan nelayan yang menggunakan jaring insang dengan ukuran mata jaring 1,75 dan 2 inci di Tempat Pelelangan Ikan Depok dan Samas. Pengumpulan sampel ikan dilakukan pada bulan Januari hingga April 2016 setiap dua minggu sekali minimal 30 ekor. Sampel ikan diidentifikasi jenis kelamin, diukur panjang, bobot tubuh, bobot gonad, dan tingkat kematangan gonad (TKG). Data yang dianalisis meliputi sebaran panjang, bobot, nisbah kelamin, indeks kematangan gonad, ukuran ikan kali pertama matang gonad (Lm), fekunditas, dan diameter telur. Hasil pengamatan menunjukkan kisaran panjang ikan 52,8-86,2 cm dan bobot 115-567,2 g, nisbah betina dan jantan sebesar 1 : 0,6. TKG II dan III ditemukan pada setiap bulan pengamat-an sedangkan TKG IV banyak ditemukan pada bulan April. Diameter telur ikan TKG IV berkisar 0,35-1,02 mm, terda-pat dua modus persebaran sehingga pemijahan diduga bertahap dan fekunditas sebanyak 24.601 butir dengan kisaran 12.873-33.534 butir. Fekunditas meningkat seiring panjang tubuh induk dengan persamaan F = 0,434L2,60. Ukuran ikan layur kali pertama matang gonad diperkirakan pada panjang 65,55 cm, lebih panjang daripada ukuran rata-rata tertangkap, yaitu pada 63,4 cm.

scholarly journals Morphometric Aspects of Scad Decapterus macrosoma Bleeker, 1851 in Cape of Salonggar Regency

2018 ◽  
Vol 6 (1) ◽  
pp. 61 ◽  
Author(s):  
Mediyanto Samuel Panaha ◽  
Fransine B Manginsela ◽  
Meiske S. Salaki
Keyword(s):  
Sex Ratio ◽  
Allometric Growth ◽  
Maturity Level ◽  
Female Fish ◽  
Growth Type ◽  
Male Fish ◽  
Total Size ◽  
Gonadal Maturity ◽  
Length Increase ◽  
Immature Fish

This study aims to determine the biological appearance of globe fish that includes size distribution, growth pattern, sex ratio and maturity level of gonad (TKG) in Tanjung Salonggar Melonguane waters of Talaud Islands Regency. Sampling was conducted from May to July 2017. Decapterus macrosoma has found during the study were 268 with total size of 150 - 244 mm and the weight ranged from 34 to 142 grams. Kite fish caught in Tanjung Salonggar has a negative allometric growth type that is the length increase faster than weight gain (b <3). The sex ratio of male fish and female fish is equal to 1: 1, with maturity level of Gonad (TKG) I up to TKG V. The highest gonadal maturity level is found in June and July, both male and female fish, while in May fish which is caught predominantly by an immature fish gonad. Keywords: Biological appearance, Decapterus macrosoma, growth pattern.AbstrakPenelitian ini bertujuan untuk mengetahui tampilan biologis ikan layang yang meliputi sebaran ukuran, pola pertumbuhan, rasio kelamin dan tingkat kematangan gonad (TKG) di Perairan Tanjung Salonggar Melonguane Kabupaten Kepulauan Talaud. Pengambilan sampel dilakukan pada bulan Mei sampai bulan Juli 2017. Ikan layang Decapterus macrosoma yang diperoleh selama penelitian sebanyak 268 ekor dengan Sebaran ukuran panjang total 150 – 244 mm dan berat berkisar 34 – 142 gram. Ikan layang yang tertangkap di Tanjung Salonggar memiliki tipe pertumbuhan allometrik negatif yaitu pertambahan panjang lebih cepat dari pertambahan berat (b < 3). Rasio kelamin ikan jantan dan ikan betina adalah seimbang  yaitu 1 : 1, dengan Tingkat Kematangan Gonad  (TKG ) I sampai dengan TKG V. Tingkat kematangan gonad tertinggi ditemukan pada bulan Juni dan Juli, baik ikan jantan maupun ikan betina, sementara pada bulan Mei ikan yang tertangkap didominasi oleh ikan yang belum matang gonad.Kata kunci : Tampilan biologis, Decapterus macrosoma, Pola pertumbuhan.

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