scholarly journals Biomorfometrik Kepiting Bakau (Scylla sp.) Hasil Tangkapan di Perairan Semarang Guna Menunjang Konservasi Sumberdaya Hayati

2018 ◽  
Vol 7 (2) ◽  
pp. 81 ◽  
Author(s):  
Anggun Sri Hardiyanti ◽  
Sunaryo Sunaryo ◽  
Ita Riniatsih ◽  
Adi Santoso
Keyword(s):  
Condition Factor ◽  
Carapace Width ◽  
Economic Value ◽  
Maturity Level ◽  
Ratio Distribution ◽  
Spawning Period ◽  
Gonad Maturity ◽  
Male Ratio ◽  
Mangrove Crab ◽  
Almost All

Kepiting bakau (Scylla sp.) merupakan komoditas perikanan yang memiliki nilai ekonomi tinggi. Permintaan terhadap komoditas kepiting dari tahun ke tahun cenderung meningkat, sehingga dalam memenuhi semua permintaan ini seluruhnya berasal dari hasil tangkapan di alam, yaitu sebesar 70% dan banyaknya penangkapan kepiting bakau tanpa memperhatikan ukuran yang layak tangkap. Penelitian ini bertujuan untuk mengkaji biomorfometrik kepiting bakau, meliputi jumlah, distribusi, nisbah kelamin, hubungan lebar karapas dan berat, faktor kondisi dan tingkat kematangan gonad. Penelitian menggunakan metode deskriptif eksploratif. Penelitian dilaksanakan pada bulan  Mei – Juni 2017 di kawasan perairan Semarang, yaitu di Mangkang Wetan, Tapak, Tanah Mas dan Tambak Lorok. Hasil penelitian menunjukkan, bahwa jumlah kepiting bakau yang diamati sebanyak 616 ekor, terdiri atas 362 betina (58,77%) dan 254 jantan (41,23%), perbandingan betina dan jantan 1,43 : 1. Ukuran lebar karapas berkisar antara 47,05 - 132,56 mm dengan berat berkisar antara 33,02 - 513,09 g. Hubungan lebar karapas dengan berat bersifat allometrik negatif dan positif. Nilai faktor kondisi yang didapatkan berkisar 1,368 – 9,752. Tingkat kematangan gonad kepiting betina maupun jantan didominasi oleh TKG II dan III, dengan demikian diduga pada bulan Mei – Juni di perairan Semarang sedang terjadi masa pemijahan. Biomorphometry of Mangrove Crab (Scylla sp.) Catched in SemarangMangrove crab (Scylla sp.) is one of the fishery commodities that have high economic value. The demand for crab commodity from year to year tends to increase, in order to fulfilling all these demands almost all of them come from the catch in nature that is equal to 70%, and this led to the occurrence of a lot of mangrove crab catching regardless of the size of the catch. This study aimed to examine the biomorphometric of mangrove crab, 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. This research was conducted from May - June 2017 in the Semarang waters included Mangkang Wetan, Tapak, Tanah Mas and Tambak Lorok. The results showed that the composition of mangrove crab were 616, consist of 362 females (58,77%) and 254 males (41,23%), with the comparison of female and male ratio of 1,43 : 1. The size of the obtained carapace width ranged from 47,05 - 132,56 mm with the size of the weight ranged from 33,02 – 512,09 g. The relations between width and weight of caparace indicated allometric. The value of the obtained condition factor ranged from 1,368 – 9,752. Gonad maturity level of male and female mangrove crab was dominated by TKG II and III, because the research location was in the spawning period.

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 Analisis Aspek Reproduksi Kepiting Bakau (Scylla sp.) Di Perairan Kendal, Jawa Tengah

2019 ◽  
Vol 2 (1) ◽  
pp. 29-36
Author(s):  
Ester Tiurlan ◽  
Ali Djunaedi ◽  
Endang Supriyantini
Keyword(s):  
Gonad Index ◽  
Local Market ◽  
Marine Biota ◽  
Maturity Level ◽  
Chi Square ◽  
Spawning Period ◽  
Female Ratio ◽  
Male And Female ◽  
Central Java ◽  
Mangrove Crab

Kepiting bakau Scylla sp. merupakan salah satu biota laut yang mempunyai nilai ekonomis penting. Penyebarannya hampir di seluruh kawasan pesisir Indonesia, yang memiliki ekosistem mangrove termasuk di perairan Kendal. Banyaknya penangkapan kepiting bakau tanpa memperhatikan ukuran yang layak tangkap. Oleh karena itu penelitian ini dilakukan untuk memperoleh beberapa aspek reproduksi kepiting bakau Scylla sp. di perairan Kendal, Jawa Tengah. Pengambilan sampel dilakukan pada bulan Februari–Maret 2017, dua minggu sekali selama dua bulan di perairan Kendal, Jawa Tengah. Metode yang digunakan dalam penelitian ini adalah metode deskriptif eksploratif dengan parameter pendukung seperti suhu, salinitas, pH, dan DO. Materi yang digunakan adalah kepiting bakau Scylla sp. Analisis yang digunakan untuk menghitung perbandingan jumlah kepiting bakau jantan dan betina adalah uji chi square. Hasil penelitian menunjukkan bahwa komposisi ukuran kepiting bakau mempunyai lebar karapas 81-130 mm, berat 100-350 gram dengan ukuran rata-rata yang tertangkap 99,62 mm, perbandingan jantan dan betinanya 1:2,09. Hubungan lebar karapas dengan berat menunjukkan sifat allometrik positif. Faktor kondisi yang didapatkan adalah 1,0185. Tingkat kematangan gonad kepiting bakau di dominasi oleh TKG II, nilai indeks kematangan gonad pada kepiting bakau betina berkisar antara 6,84% - 18,49%. Tingkat kematangan gonad yang di dominasi oleh TKG II dikarenakan di lokasi penelitian tidak sedang masa pemijahan.   Mangrove crab (Scylla sp.) is one of the marine biota that it has value economically important. It spreads in almost all over coastal areas of Indonesia, which has the mangrove ecosystem. Mangrove crab has a high nutritional value. Thus, encouraging people in Kendal to consume a large amount of mangrove crab and reach the local market demand.This led to the occurrence of a lot of mangrove crab catching regardless of the size of the catch.Therefore, this study was conducted to obtain some of reproduction aspects of Scylla sp. in the Kendal waters, Central Java. Sampling was conducted in February-March 2017,every two weeks in two months in Kendal waters, Central Java. The method used in this research was descriptive explorative method with supporting parameters such as temperature, salinity, pH, and DO. The used material was mangrove crab (Scylla sp.). Chi square test was used to analyze and calculate the ratio of male and female mangrove crabs. The results showed that the size composition of mangrove crab had a carbide width of 71-130 mm, weight of 100-350 grams, with average size captured was 99.62 mm, male and female ratio of 1: 2.09. The Relations between width and weight of caparace indicated negative allometric properties. The obtained condition factor was 1.0184767. Maturity level of mangrove crab gonad was dominated by TKG II, gonad index maturity value on female mangrove crab ranged between 6.84% - 18.49%. The maturity level of gonad was dominated by TKG IIbecause the research location was not in the spawning period.

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 THE CORRELATION OF CARAPACE WIDTH – BODY WEIGHT, CONDITION FACTOR, AND ABUNDANCE OF SCYLLA SERRATA FORSSKÅL, 1775 IN EMBANKMENT LANE SILVOFISHERY DEVELOPMENT AREA OF MAROS DISTRICT

2020 ◽  
Vol 7 (12) ◽  
pp. 177-188
Author(s):  
Budiman Yunus ◽  
Suwarni
Keyword(s):  
Coastal Area ◽  
Condition Factor ◽  
Carapace Width ◽  
Scylla Serrata ◽  
Male And Female ◽  
South Sulawesi ◽  
Mangrove Crab ◽  
Weight Condition ◽  
Development Area ◽  
Mangrove Crabs

The research aims to find out the correlation of carapace width – weight, condition factor and abundance of mangrove crab based on observation time and sex in the coastal waters of Maros district, South Sulawesi. This research provides information on the pattern of growth and chubbiness of mangrove crabs and its abundance in the coastal area of Maros district, South Sulawesi. The study was conducted from early February until the end of April 2019. Sampling was conducted on the coastal area of Kuri Lompo and estuary of Maros which is an integrated mangrove pond development (silvofishery). 213 mangrove crabs (120 male and 93 female) obtained from fishermen were measured. The coefficient b of male and female mangrove crabs in February and March were 3.3626 and 2.6674, respectively. In April, b value of male and female mangrove crab was 3.5965 and 2.6506, respectively. This relation shows the growth type for males is allometric-positive whereas for females is allometric-negative. In April also saw the same growth coefficient in the previous month allometric positive for males and allometric negative for females. In general, the condition factor of male mangrove crabs in February and March is greater than female mangrove crabs. While, in April the condition factor of female mangrove crab is greater than male mangrove crab. The nature of condition factor of mangrove crab represents the distribution of crab abundance in the embankment lane silvofishery development area of 0.015 ind./m2.

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 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 Different Percentages of Gonad Maturity on The Fertility and Haching Rate in Artificial Breeding of Abalone (Haliotis asinina)

2012 ◽  
Vol 6 (1) ◽  
pp. 79-87
Author(s):  
Suminto Suminto
Keyword(s):  
Artificial Insemination ◽  
Culture Media ◽  
Economic Value ◽  
Fertilization Rate ◽  
Ammonia Solution ◽  
Hatching Rate ◽  
Maturity Level ◽  
Gonad Maturity ◽  
Gonadal Maturation ◽  
Artificial Breeding

Abalone is one of the marine mollusk that has high economic value. Mass abalone cultivation requires the mature gonads broodstock to produce seeds, but the maturity of the gonads of male and female often can not be simultaneously. Artificial insemination using a solution of ammonia is one solution to produce abalone seed in the hatchery. Ammonia solution can increase motility, fertilization rate of eggs and abalone seed production, so the provision of seeds for cultivation of abalone is independent from nature. The research of artificial insemination was carried out at various levels of gonadal maturation dams abalone (H. asinina) to determine the percentage of fertility and hatching rate of eggs from each Gonad Maturity Level. In stadia gonadal recovery, no fertilization occurs, whereas in the gonads maturing stadia had fertilization and hatching rate 24.33 ± 2.08% and 22.12 ± 2.18%, respectively at ripe stadia, gonads had been fertilization and hatching rate were 94.67% ± 1.53% and 82.82% ± 3.58%, wasn’t recorded in the stadia spent fertilization did not occur because the eggs were released in culture media. Gonad Maturity Level, thus can be used in artificial insemination was the ripe gonadal stadia, which had the highest percentage of both levels of fertilization and hatching rate with a diameter ranging from 189.6-252.8 μm.   Key Words : Abalone (H. asinine); Artificial breeding; Gonad Maturity Level; Hatching Rate  

scholarly journals Length-weight relationship and condition factor of an endemic Lagusia micracanthus Bleeker, 1860 in Rivers of the Maros Watershed

2020 ◽  
Vol 20 (3) ◽  
pp. 263
Author(s):  
Muhammad Nur ◽  
M. Fadjar Rahardjo ◽  
Charles P.H Simanjuntak ◽  
Djumanto Djumanto ◽  
Krismono Krismono
Keyword(s):  
Condition Factor ◽  
Stage Iv ◽  
Maturity Stage ◽  
Allometric Growth ◽  
Spawning Period ◽  
Gonad Maturity ◽  
Weight Relationship ◽  
South Sulawesi ◽  
Fish Samples ◽  
Three Rivers

Lagusia micracanthus is one of endemic freshwater fish in Sulawesi. It also has been locally consumed. The purpose of this research was to analyze length-weight relationship and condition factors of L. micracanthus in rivers of the Maros Watershed, South Sulawesi Province . The study was conducted in three rivers, namely Pattunuang River, Bantimurung River and Pucak River. The sampling was conducted monthly from May 2018 to April 2019. Fish samples were collected by an electric shocker (12 V and 9 A). A total of 1850 individual fishes with samples ranging from 31.58-127.79 mm in total length and 0.76-31.07 g in weight. The length-weight relationship was W = 0.00009L2.6241 (r = 0.95) in Pattunuang River, W = 0.0001L2.5237 (r = 0.94) in Bantimurung River, and W = 0.0001L2.4953 (r = 0.92) in Pucak River. The slope (b) values of L. micracanthus obtained a negative allometric growth pattern (b <3). The relative condition factors of L. micracanthus was fluctuated from 0.86 to 1.43 in Pattunuang River, 0.65 to 1.45 in Bantimurung River, and 0.55 to 1.26 in Pucak River. The condition factor increased towards the peak of the spawning season and decreased after the spawning period. The condition factor increased with the increasing of gonad maturity stage up to stage IV and decreased after spawned or stage V.

Temporal variation in the weight-size relationship of the mangrove crab Ucides cordatus L. (Decapoda: Ucididae) in relation to its life cycle phases

2014 ◽  
Vol 64 (4) ◽  
pp. 333-342 ◽  
Author(s):  
Marcos de Miranda Leão Leite ◽  
Cynthia Yuri Ogawa ◽  
Carla Ferreira Rezende ◽  
José Roberto Feitosa Silva
Keyword(s):  
Life Cycle ◽  
Condition Factor ◽  
River Estuary ◽  
Total Weight ◽  
Northeastern Brazil ◽  
Annual Life Cycle ◽  
Ucides Cordatus ◽  
Mangrove Crab ◽  
Significant Difference ◽  
The Relationship

The relationship between weight and size of individuals can be used to evaluate the status of a population, which is particularly useful for natural populations that are being exploited. Ucides cordatus occurs on the Atlantic coast of the American continent, from Florida (USA) to Santa Catarina (Brazil). This species is economically very important, most of all in the Northeastern area of Brazil, as well as in the Dominican Republic and Suriname. The objective of this study was to analyze life phases (‘fattening’, ‘matumba’, ‘milk-crab’, ‘maturation’ and ‘walking’) by use of the weight-length relationships, as well as temporal variations in this condition factor for each sex of U. cordatus. For this purpose, individuals were sampled monthly for twenty-four months at the Jaguaribe River estuary, Ceará State, Northeastern Brazil. The relationship between total weight and cephalothorax width was established using regression analysis, adjusted by a power equation. The dynamics of the condition factor were analyzed for each sex using the variation of its averages related to annual life cycle; this was done for each of the previously-mentioned phases. The relationship between total weight and cephalothorax width showed an isometric growth in males and negative allometric growth in females suggesting that, for the same reference size, males are heavier than females. When considering the average of the female condition factors, these were greater than those for males during the annual life cycle, except during the ‘maturation’ phase, which is the phase with a higher demand of energetic reserves for males. Annual variation of the condition factor in females presented no significant difference.

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