scholarly journals ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Emerita emeritus DARI PANTAI BERPASIR KABUPATEN KEBUMEN

2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Ali Mashar Dan Yusli Wardiatno
Keyword(s):  
Growth Pattern ◽  
Sustainable Management ◽  
Carapace Length ◽  
Sandy Beach ◽  
Biological Information ◽  
Swash Zone ◽  
Male And Female ◽  
Combining Data

ABSTRAKUndur-undur laut merupakan bagian dari kelompok krustasea yang menghuni pantai berpasirdi daerah intertidal.Undur-undur laut mempunyai fungsi ekonomi dan ekologi.Salah satu jenisundur-undur laut yang banyak dijumpai di Indonesia adalah jenis Emerita emeritus.Mengingatpentingnya fungsi ekonomi dan ekologi undur-undur laut, maka kajian tentang polapertumbuhan undur-undur laut penting dilakukan sebagai dasar untuk mengelola pemanfaatanundur-undur laut secara lestari.Penelitian ini dilakukan di Pantai Bocor, KecamatanBuluspesantren, Kabupaten Kebumen.Pengambilan sampel undur-undur laut dilakukan setiapbulan dari bulan Maret hingga Mei 2012.Pengambilan sampel undur-undur laut dilakukandengan metode penyapuan dengan bantuan alat tangkap sorok pada daerah pantai berpasiryang terpengaruh gerakan gelombang (swash zone).Hasil penelitian menunjukkan bahwaundur-undur laut Emerita emeritus yang tertangkap mempunyai kisaran panjang karapasantara 19 mm hingga 34 mm, dengan ukuran yang paling banyak tertangkap pada selangpanjang 29-30 mm. Undur-undur laut di lokasi penelitian didominasi oleh undur-undur lautbetina dengan nisbah kelamin jantan/betina adalah 0,246.Pola pertumbuhan undur-undur lautEmerita emeritus jantan adalah isometrik, sedangkan undur-undur laut betina adalahalometrik negatif.Secara keseluruhan, pola pertumbuhan undur-undur laut Emerita emeritusadalah alometrik negatif. Artinya pertumbuhan panjang undur-undur laut lebih cepatdibanding pertumbuhan bobotnyaKata kunci: Emerita emeritus, pantai berpasir, undur-undur laut, selatan JawaABSTRACTMole crab is one of crustaceans inhabiting sandy intertidal. The crabs has both ecological andeconomical significance role. One common mole crab found in Indonesia is Emerita emeritus.Due to its ecological and economical function of the crab, it is neede to study the populationgrowth pattern for biological information based sustainable management. The research wasconducted in Pantai Bocor, Kecamatan Buluspesantren, Kabupaten Kebumen. Samplecollections were done monthly during March – May 2012. Sampling was done by swep areamethod by means of local fishermen gear called sorok along swash zone. The results showedthat the carapace length of collected crabs ranged from 19 – 34 mm, with the highestabundance within range of 29 – 30 mm. In terms of sex, female were the dominant with sexratio beween male and female was 0.246. The growth pattern of male was isometric, while infemale it was negative allometric. However, combining data showed that the growth patern ofthe population was negative allometric; meaning that its length grows faster than its weight.Keywords: Emerita emeritus, sandy beach, mole crab, southern part of Jawa

scholarly journals ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Hippa adactyla DARI PANTAI BERPASIR KABUPATEN KEBUMEN

2013 ◽  
Vol 13 (2) ◽  
Author(s):  
Ali Mashar Dan Yusli Wardiatno
Keyword(s):  
Growth Pattern ◽  
Sustainable Management ◽  
Sandy Beach ◽  
Biological Information ◽  
Swash Zone ◽  
Area Method ◽  
The World ◽  
Biological Component ◽  
Swept Area ◽  
Ecology And Economy

ABSTRAKUndur-undur laut atau mole crab merupakan komponen penting dari komunitas makrobentos di pantaiberpasir terbuka, baik di daerah tropis maupun bermusim empat di seluruh dunia.Undur-undur lautmempunyai fungsi ekonomi dan ekologi.Salah satu jenis undur-undur laut yang banyak dijumpai diIndonesia adalah jenis Hippa adactyla.Karena fungsi ekonomi dan ekologi undur-undur laut pentinguntuk dilestarikan, salah satu informasi penting yang dibutuhkan adalah pola pertumbuhan undurundurlaut.Penelitian dilakukan di Pantai Bocor, Kecamatan Buluspesantren, KabupatenKebumen.Pengambilan sampel undur-undur laut dilakukan setiap bulan dari bulan Maret hingga Mei2012, yang dilakukan dengan metode penyapuan dengan bantuan alat tangkap sorok pada daerahpantai berpasir yang terpengaruh gerakan gelombang (swash zone) (swept area method).Hasilpenelitian menunjukkan bahwa undur-undur laut Hippa adactyla yang tertangkap mempunyai kisaranpanjang karapas antara 15 mm hingga 40 mm, dengan ukuran yang paling banyak tertangkap beradapada selang panjang karapas 24-26 mm.Nisbah kelamin undur-undur laut di lokasi penelitianmendekati 1 (1,035) atau tergolong seimbang, dimana jumlah undur-undur laut jantan relatif seragamdengan undur-undur laut betina.Kondisi ini juga menunjukkan bahwa kondisi populasi undur-undurlaut di lokasi penelitian relatif stabil. Pola pertumbuhan undur-undur laut Hippa adactylaseluruhnya,baik jantan, betina, maupun gabungan, adalah isometrik, artinya pertambahan panjang undur-undurlaut relatifsama dengan pertambahan bobotnya.Kata kunci: Hippa adactyla, pantai berpasir, undur-undur lautABSTRACTMole crabs are one of important biological component among macrobenthos communityinhabiting sandy beach, both in tropic or temperate area all over the world. They playsignificant ecology and economy role in their habitat. One of Indonesian mole crabs is Hippaadactyla. Due to its ecological and economical function of the crab, it is neede to study thepopulation growth pattern for biological information based sustainable management. One ofimportant biological information is growth pattern. The research was conducted in PantaiBocor, Kecamatan Buluspesantren, Kabupaten Kebumen. Sample collections were donemonthly during March – May 2012. Sampling was done by swep area method by means oflocal fishermen gear called sorok along swash zone. The results showed that the carapacelength of collected crabs ranged from 19 – 34 mm, with the highest abundance within range of29 – 30 mm. Female dominated the sex ratio. The F/M ratio was 0.244. The growth pattern ofmale was isometric, while in female it was negative allometric. However, combining datashowed that the growth patern of the population was negative allometric, so its length growsfaster than its weight.Keywords: Hippa adactyla, sandy beach, mole crab, southern part of Jawa

scholarly journals Burrowing Time of the Three Indonesian Hippoid Crabs After Artificial Dislodgment

2016 ◽  
Vol 21 (3) ◽  
pp. 135
Author(s):  
Yusli Wardiatno ◽  
Yuyun Qonita ◽  
Agus Alim Hakim
Keyword(s):  
Indian Ocean ◽  
Carapace Length ◽  
Sandy Beach ◽  
Sediment Surface ◽  
Swash Zone ◽  
Target Species ◽  
Large Wave ◽  
Intertidal Sand ◽  
Sandy Coast ◽  
Sandy Habitat

Three species of hippoid crabs are the target species of intertidal fishery along coastal line in District Cilacap, south Java; namely Emerita emeritus, Hippa adactyla and Albunea symmista. In Adipala sandy beach, Cilacap  an experiment was conducted to reveal the burrowing time and velocity of the crabs. The experiment was performed by removing the crabs from their burrows, measuring their carapace length, and releasing them immediately on the substrate. Burrowing time was measured from the start of burrowing to the disappearance of the entire carapace under the sediment surface. Among the three species, E. emeritus had the fastest burrowing time. As a consequence in terms of velocity, the burrowing velocity of Albunea symmista was higher than that of Hippa adactyla and Emerita emeritus; meaning that with the same size A. symmista needs longer time to burrow. By evaluating with other previous studies, the burrowing time and burrowing velocity of the three sand crabs were comparable. The ability of fast burrowing in the three species seems likely to be the advantage for their survival in large wave disturbed coarse sandy habitat and for their ability to widely exist along the sandy coast of south Java. Keywords: behavior; Indian ocean; intertidal; sand crab; south Java; swash zone

scholarly journals BEBERAPA ASPEK BIOLOGI UDANG BANANA (Metapenaeus dobsoni) DAN UDANG KAYU (M. affinis) DI PERAIRAN TELUK CEMPI, NUSA TENGGARA BARAT

2017 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Masayu Rahmia anwar Putri ◽  
Adriani Sri Nastiti
Keyword(s):  
Sex Ratio ◽  
Growth Pattern ◽  
Sustainable Management ◽  
Carapace Length ◽  
Length Distribution ◽  
Immature Stage ◽  
Fishing Ground ◽  
Biological Parameters ◽  
Maturity Stages ◽  
First Maturity

Perairan Teluk Cempi merupakan salah satu daerah penangkapan udang potensial di Nusa Tenggara Barat khususnya udang benana (Metapenaeus dobsoni) dan udang kayu (M. affinis). Pemanfaatan sumberdaya udang yang tidak terkendali akan mengancam kelestarian sumberdaya udang. Sebagai dasar untuk pengelolaan yang berkelanjutan perlu dilakukan kajian beberapa parameter biologi meliputi nisbah kelamin, sebaran ukuran panjang, hubungan panjang dan berat, tingkat kematangan gonad, ukuran pertama kali matang gonad dan ukuran pertama kali tertangkap. Penelitian ini dilaksanakan di perairan Teluk Cempi, Nusa Tenggara Barat pada bulan April-Desember 2013. Sampel udang didapatkan dari percobaan penangkapan dan hasil tangkapan nelayan yang didaratkan di Desa Jala, Kabupaten Dompu, kemudian dicatat data biologinya oleh enumerator. Hasil penelitian menunjukkan nisbah kelamin udang kayu dan banana betina lebih banyak dibandingkan udang jantan (lebih dari 60%). Panjang karapas udang benana dan udang kayu betina lebih besar dibandingkan udang jantan. Pola pertumbuhan udang benana dan udang kayu alometrik negatif. Udang benana dan udang kayu di Teluk Cempi dapat memijah sepanjang tahun. Hasil tangkapan udang didominasi udang yang belum matang gonad (TKG I-II). Udang benana pertama kali matang gonad (Lm) pada ukuran 24 mm dan Lm udang kayu pada ukuran 26,2 mm. Ukuran udang benana pertama kali tertangkap (Lc) adalah 16,25 mm (jantan) dan 19,69 mm (betina), sedangkan Lc udang kayu diperoleh 19 mm (jantan) dan 24,57 mm (betina). Tekanan penangkapan udang di Teluk Cempi sudah sangat intesif yang terindikasi dari tingginya hasil tangkapan udang yang belum matang gonad dan nilai Lc yang lebih kecil dari Lm.The Cempi Bay is one of the potential fishing ground of shrimp in West Nusa Tenggara, especially for Metapenaeus dobsoni and M.affinis. The unmanaged exploitation leads to unsustainability of shrimp resources. As a basis for sustainable management it is necessary to study several biological parameters as sex ratio, length distribution, length and weight relationship, maturity stages, the length at first maturity and length at first capture. This research was conducted in Cempi Bay Waters on April to December 2013. Samples were obtained from experimental fishing and fisherman’s catch that landed in Jala Village, Dompu Regency, then its biology data recorded by enumerators. The results showed that sex ratio of females Metapenaeus affinis and M. dobsoni was higher than males (more than 60%). The carapace length of M.dobsoni and M. affinis was larger than males. The growth pattern of both M.dobsoni and M.affinis were allometric negative. Both shrimp species may spawn throughout the year. The shrimp catch dominated immature stage (I-II maturity stages). The carapace length at first maturity (Lm) of M.dobsoni was 24 mm and Lm of M.affinis was 26.2 mm. The carapace length at first capture (Lc) of M.dobsoni was 16.25 mm (male) and 19.69 mm (female), while the Lc of M.affinis was 19 mm (male) and 24.57 mm (female). The pressure of shrimp fishing in Cempi Bay has been very intensive, indicated by the high catches of immature shrimp and the value of Lc was smaller than Lm.

scholarly journals A comparison of the allometric growth in Uca leptodactyla (Crustacea: Brachyura: Ocypodidae) from two subtropical estuaries

2004 ◽  
Vol 84 (4) ◽  
pp. 733-735 ◽  
Author(s):  
Rosana Carina Flores Cardoso ◽  
Maria Lucia Negreiros-Fransozo
Keyword(s):  
Growth Pattern ◽  
Sexual Maturity ◽  
Carapace Length ◽  
Brazilian Coast ◽  
Allometric Growth ◽  
Size At Sexual Maturity ◽  
Subtropical Estuaries ◽  
Habitat Similarity

The allometric growth of Uca leptodactyla from two distinct subtropical estuaries on the Brazilian coast was evaluated concerning its growth pattern and size at onset of sexual maturity. Females attained maturity at similar sizes in both sites (4·1 mm of carapace length in Indaiá and 4·2 mm in Ubatumirim), while males differed slightly. They reached the size at sexual maturity of 5·3 mm of carapace length in Indaiá and 4·6 mm in Ubatumirim. Growth pattern is usually similar among crabs from distinct sites while size at sexual maturity is frequently different. However, in the case of U. leptodactyla it did not occur, probably due to the strong habitat similarity and intrinsic features of this species.

scholarly journals EFFECTS OF SEASONAL VARIATIONS ON SANDY BEACH GROUNDWATER TABLE AND SWASH ZONE SEDIMENT TRANSPORT

2014 ◽  
Vol 1 (34) ◽  
pp. 59
Author(s):  
Norasman Othman ◽  
Ahmad Khairi Abd Wahab ◽  
Mohamad Hidayat Jamal
Keyword(s):  
Sediment Transport ◽  
Seasonal Variations ◽  
Sandy Beach ◽  
Groundwater Table ◽  
Swash Zone

scholarly journals Length-weight relationships and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes) in River Galma, Zaria, Kaduna State, Nigeria

2017 ◽  
Vol 4 (8) ◽  
pp. 301-305
Author(s):  
Matouke M. Moise
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Growth Pattern ◽  
Condition Factor ◽  
Allometric Growth ◽  
Male And Female ◽  
B Values ◽  
The Poor ◽  
Poor Water Quality ◽  
The Mean

The investigation of length-weight relationship and condition factor are very relevant indices to ascertain the health of fish in the water body. Length-weigh relationship and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes: Mormyridae) in River Galma, Zaria, Kaduna State, Nigeria, were assessed. The mean length and mean weigh in male and female were 26.703 cm +/- 0.51 cm and 25.32 cm +/- 0.898 cm; 158.2 g +/- 10.1 g and 95.91 g +/- 9.26 g, respectively. The exponent or growth pattern 'b' values for male and female were 2.009 and 2.176. The condition factor for male and female were 0.59 and 0.83, respectively. The negative allometric growth pattern and poor condition factor might be due to the poor water quality in the fish ecosystem and should be regarded with concern.

scholarly journals Inference of an Integrative, Executable Network for Rheumatoid Arthritis Combining Data-Driven Machine Learning Approaches and a State-of-the-Art Mechanistic Disease Map

2021 ◽  
Vol 11 (8) ◽  
pp. 785
Author(s):  
Quentin Miagoux ◽  
Vidisha Singh ◽  
Dereck de Mézquita ◽  
Valerie Chaudru ◽  
Mohamed Elati ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Machine Learning ◽  
State Of The Art ◽  
Biological Information ◽  
Response To Treatment ◽  
Patient Specific ◽  
Learning Approaches ◽  
Data Types ◽  
Disease Heterogeneity ◽  
Combining Data

Rheumatoid arthritis (RA) is a multifactorial, complex autoimmune disease that involves various genetic, environmental, and epigenetic factors. Systems biology approaches provide the means to study complex diseases by integrating different layers of biological information. Combining multiple data types can help compensate for missing or conflicting information and limit the possibility of false positives. In this work, we aim to unravel mechanisms governing the regulation of key transcription factors in RA and derive patient-specific models to gain more insights into the disease heterogeneity and the response to treatment. We first use publicly available transcriptomic datasets (peripheral blood) relative to RA and machine learning to create an RA-specific transcription factor (TF) co-regulatory network. The TF cooperativity network is subsequently enriched in signalling cascades and upstream regulators using a state-of-the-art, RA-specific molecular map. Then, the integrative network is used as a template to analyse patients’ data regarding their response to anti-TNF treatment and identify master regulators and upstream cascades affected by the treatment. Finally, we use the Boolean formalism to simulate in silico subparts of the integrated network and identify combinations and conditions that can switch on or off the identified TFs, mimicking the effects of single and combined perturbations.

scholarly journals The population and mortality characteristics of mangrove crab (Scylla serrata) in the mangrove ecosystem of Tarakan City, Indonesia

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
AGUS INDARJO ◽  
Gazali Salim ◽  
MUFRIDA ZEIN ◽  
DODDY SEPTIAN ◽  
STEPHANIE BIJA
Keyword(s):  
Carapace Length ◽  
Total Mortality ◽  
Condition Index ◽  
Mangrove Ecosystem ◽  
Scylla Serrata ◽  
Primary Data ◽  
Allometric Growth ◽  
Male And Female ◽  
Mangrove Crab ◽  
Mangrove Crabs

Abstract. Indarjo A, Salim G, Zein M, Septian D, Bija S. 2020. The population and mortality characteristics of mangrove crab (Scylla serrata) in the mangrove ecosystem of Tarakan City, Indonesia. Biodiversitas 21: 3856-3866. The mangrove crab is an iconic species of Tarakan City and is often is used as a souvenir. However, the high demand for this species can cause its population to decline. This study aimed to characterize the mangrove crab (Scylla serrata) population in the mangrove ecosystem of Tarakan City, North Kalimantan, Indonesia. This study was designed using a quantitative descriptive method with a case study model. The samples of mangrove crabs were obtained from 6 different stations using a purposive sampling method. The mangrove crab specimens were caught using 35-50 units of crab traps known as the ambau brackets. The primary data included carapace length, carapace width, carapace thickness, sex, and the total weight of each mangrove crab specimen. The results showed that male mangrove crabs have positive allometric growth when the condition index was fat. However, female crabs exhibited negative allometric growth when the condition index was thin. The Von Bertalanffy growth model analysis showed that the maximum carapace length of male mangrove crab in the mangrove ecosystem of Tarakan City was approximately 11.1118 cm for 189 days, while the female length was 9.6474 cm for 80 days. The total mortality value of male and female crabs was 120.01% and 154.94%, the mortality due to fishing was 84.69% and 135.75%, and natural mortality was 35.32% and 19.2%, respectively. The estimated rate of exploitation of both male and female crabs was 70.57% and 87.61%, respectively. The exploitation of S. serrata in the mangrove ecosystem of Tarakan City was evident, hence, conservation efforts are urgently required.

scholarly journals Length-weight Relationship, Growth Pattern and Condition Factor of the Silver Catfish Chrysichthys nigrodigitatus (Lacepède, 1803) from Lower River Benue, Nigeria

2018 ◽  
pp. 1-8
Author(s):  
Edem, Edem Thomas ◽  
Ofunama, Preye ◽  
Eyo, Victor `Oscar
Keyword(s):  
Population Dynamics ◽  
Growth Pattern ◽  
Sustainable Management ◽  
Condition Factor ◽  
B Value ◽  
Health Condition ◽  
Artisanal Fisheries ◽  
Allometric Growth ◽  
Silver Catfish ◽  
Weight Relationship

This study was carried out to evaluate the length-weight relationship, growth pattern and condition factor of the Silver catfish Chrysichthys nigrodigitatus from the Lower River Benue Makurdi, Nigeria. A total of 200 freshly caught specimens of C. nigrodigitatus were collected between July 2013 and September 2013 from the catches of the artisanal fisheries at landing points in Wadata Market, Makurdi. Results obtained showed that the “b” value for the males was 1.6067 while that of the females was 1.6791 and combined sexes 1.7371, indicating a negative allometric growth for this species. Correlation coefficient (r) obtained for males (0.9651), 0.9517 (females) and 0.9329 (pooled sexes) showed a positive significant relationship between length and weight of C. nigrodigitatus. Monthly mean condition factor (K), indicate that C. nigrodigitatus were in good physiological health condition. In conclusion, the baseline data on the length-weight relationship, condition factor of C. nigrodigitatus from the lower River Benue provided in this study is crucial in the sustainable management of this species in the River. Also, these findings will be useful in evaluating the population dynamics, stock and the aquaculture potential of C. nigrodigitatus for future purpose.

scholarly journals Growth pattern of three species of Mullets (Pisces: Mugilidae) in Sombreior River, Rivers State, Niger Delta, Nigeria

2020 ◽  
Vol 5 (2) ◽  
pp. 68-72 ◽  
Author(s):  
Henry Eyina Dienye ◽  
Olaniyi Alaba Olopade
Keyword(s):  
Fish Species ◽  
Growth Pattern ◽  
Niger Delta ◽  
Condition Factor ◽  
Well Being ◽  
Biological Information ◽  
Allometric Growth ◽  
Good State ◽  
Abiotic And Biotic Factors ◽  
Rivers State

Length-weight relationships (LWRs) and condition factor are important biological information to assess the growth pattern and wellbeing of fish species influenced by numerous abiotic and biotic factors. To date, no data on the LWRs and condition of mullets in Sombreior River, Niger Delta. Hence, this research was conducted to determine abundance, length–weight relationship and Fulton’s condition factor (K) of three species of fish belonging to family Mugilidae in Sombreior River, Nigeria. There were a total of 248 samples from five sampling stations for a period of months. Fish species were of various sizes ranging from 24.66±0.40 to 26.35±0.26cm in length and 141.41±6.30 to 161.56±5.87g in weight. For the three species, slope (b) values ranged from 2.18 to 2.68 indicating a negative allometric growth of all fish species. The mean condition factor ranged from 0.89±0.03 forsix Mugil cephalus to 0.93±0.03 for Parachelon grandisquamis while the coefficients of determination (R2) of the LWR regressions ranged between 0.64 (Neochelon falcipinnis) and 0.79 (Parachelon grandisquamis). It was concluded that the mullets in the Sombreior River had a negative allometric growth pattern and the condition is showing the species were in good state of well-being since mean K values are  greater than 1.

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