scholarly journals Study of Long Weight Relation of Scylla serrata In Mangrove Forest Around The Wet Laboratory FPIK Eeast Likupang District North Minahasa

2017 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Stivensian M. Tumbel ◽  
Gaspar D. Manu ◽  
Alex D. Kambey
Keyword(s):  
Mangrove Forest ◽  
Economic Value ◽  
Growth Patterns ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Aquatic Biota ◽  
Mud Crab ◽  
Mangrove Crab ◽  
Relationship Of ◽  
The Relationship

Mud crab (Scylla serrata) is a ten-legged crustacean animal from Brachura infraordo, known to have a very short tail (in Greek: brachy = short, ura = tail). Mangrove crab is one of the aquatic biota that has significant economic value and its life is strongly influenced by the existence of mangrove forest. The purpose of this study is to identify and analyze the relationship of weight and growth patterns of mangrove crab (Scylla serrata). Sampling is obtained by catching activities using fishing gear that is bubu (chang). Based on the results of research conducted in the area of Mangrove Forest around Wet Laboratory Faculty of Fisheries and Marine Sciences, Likupang Timur in August - September 2017. Mangrove crab (Scylla serrata) in the can through research obtained as many as 32 individuals.Keywords: Mangrove Crab (Scylla serrata), Long Weight Relation, Growth Pattern, East Likupang ABSTRAKKepiting bakau (Scylla serrata) adalah binatang anggota crustasea berkaki sepuluh dari infraordo Brachura, yang dikenal mempunyai ekor yang sangat pendek (dalam bahasa Yunani : brachy = pendek, ura = ekor). Kepiting bakau adalah salah satu biota perairan yang bernilai ekonomis penting dan kehidupannya sangat dipengaruhi oleh keberadaan hutan mangrove. Adapun tujuan dari penelitian ini yaitu untuk mengidentifikasi dan menganalisis hubungan panjang berat berserta pola pertumbuhan dari kepiting bakau (Scylla serrata). Pengambilan sampel diperoleh dengan melakukan kegiatan penangkapan menggunakan alat tangkap yaitu bubu (chang). Berdasarkan hasil penelitian yang dilakukan di Daerah Hutan Mangrove sekitar Laboratorium Basah Fakultas Perikanan dan Ilmu Kelautan, Likupang Timur pada bulan Agustus – September 2017. Kepiting bakau (Scylla serrata) yang di dapat selama melalukan penelitian diperoleh sebanyak 32 individu. Kata Kunci : Kepiting Bakau (Scylla serrata), Hubungan Panjang Berat, Pola  Pertumbuhan, Likupang Timur.

scholarly journals Studi Morfometrik Kepiting Bakau (Scylla serrate) Forsskål, 1775 (Malacostraca : Portunidae) di Kecamatan Wedung, Demak, Jawa Tengah

2020 ◽  
Vol 9 (4) ◽  
pp. 495-500
Author(s):  
Jakfar Shodiq Panatar ◽  
Ali Djunaedi ◽  
Sri Redjeki
Keyword(s):  
Relative Abundance ◽  
Coastal Waters ◽  
Carapace Width ◽  
Economic Value ◽  
Growth Patterns ◽  
Scylla Serrata ◽  
Mangrove Forests ◽  
Mud Crab ◽  
Width Distribution ◽  
The Relationship

ABSTRAK : Kepiting bakau (Scylla serrata) adalah jenis kepiting yang hidup di perairan pantai, tambak, dan hutan bakau (mangrove). Kepiting bakau (Scylla serrata) merupakan komoditas ekspor bernilai ekonomis tinggi yang sangat potensial untuk dikembangkan dan memiliki nilai ekonomis yang tinggi di Indonesia, terutama kepiting yang sudah dewasa serta gemuk. Tujuan penelitian ini adalah untuk mengetahui karakteristik morfometrik kepiting bakau (Scylla serrata) seperti kelimpahan relatif kepiting bakau (Scylla serrata), distribusi lebar karapas, dan hubungan lebar karapas – berat kepiting bakau (Scylla serrata). Analisis yang digunakan dalam penelitian ini yaitu kelimpahan realatif kepiting dan analisis regresi. Penelitian ini dilaksanakan pada bulan Februari – April 2019 di Kecamatan Wedung, Demak. Materi yang digunakan pada penelitian ini adalah sampel kepiting bakau (Scylla serrata) hasil tangkapan nelayan di daerah tersebut. Kepiting bakau hasil tangkapan nelayan tersebut dihitung jumlahnya, diidentifikasi jenis kelaminnya, diukur lebar karapas dan ditimbang beratnya.  Hasil penelitian menunjukkan bahwa Kepiting bakau (Scylla serrata) yang tertangkap pada bulan Februari – April 2019 diperoleh 300 individu yang terdiri dari 202 jantan dan 98 betina. Rata – rata ukuran lebar karapas tertinggi berkisar 9.8 cm pada hasil tangkapan di bulan Februari. Hubungan lebar karapas – berat Kepiting bakau (Scylla serrata) baik jantan maupun betina menunjukkan pola pertumbuhan allometrik negatif. ABSTRACT : Giant mud crab (Scylla serrata) are types of crabs that live in coastal waters, ponds, and mangrove forests. Giant mud crab (Scylla serrata) is a high economic value export commodity that has the potential to be developed and has high economic value in Indonesia, especially crabs that are mature and fat. The purpose of this study was to determine the morphometric characteristics of giant mud crab (Scylla serrata) such as relative abundance of giant mud crab (Scylla serrata), carapace width distribution, and the relationship between carapace width - weight of giant mud crab (Scylla serrata). The analysis used in this study is the relative abundance of giant mud crab and regression analysis. This research was conducted in February - April 2019 in the subdistrict of Wedung, Demak. The material used in this study was a sample of giant mud crab (Scylla serrata) from the fishermen catch in the area. The giant mud crab captured by the fishermen are counted, identified by sex, measured in carapace width and weighed. The results showed that giant mud crab (Scylla serrata) caught in February - April 2019 obtained 300 individuals consisting of 202 males and 98 females. The highest average carapace width ranges from 9.8 cm in catches in February. Relationship between carapace and weight of giant mud crab (Scylla serrata) both male and female showed negative allometric growth patterns. 

scholarly journals Pengaruh ablasi mata terhadap kecepatan kematangan gonad kepiting bakau (Sylla serrata) betina

2014 ◽  
Vol 1 (1) ◽  
pp. 14
Author(s):  
Muhammad Robi ◽  
Erlangga Erlangga
Keyword(s):  
Survival Rate ◽  
Economic Value ◽  
Gonadal Development ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Average Value ◽  
Gonadal Maturity ◽  
Mangrove Crab ◽  
Randomized Design ◽  
Completely Randomized Design

Kepiting bakau (Scylla serrata) merupakan jenis golongan Crustaceae   yang mengandung protein hewani yang cukup tinggi dan memiliki nilai ekonomis yang tinggi. Ablasi mata merupakan salah satu cara untuk menghilangkan hambatan perkembangan telur (gonad) pada kepiting bakau. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) non factorial dengan 4 perlakuan dan 3 ulangan. Adapun perlakuan dalam penelitian ini adalah perlakuan A (ablasi satu pasang mata), perlakuan B (ablasi mata kiri), C (ablasi mata kanan), D (tanpa ablasi).   Hasil penelitian menunjukkan bahwa kecepatan kematangan gonad tertinggi pada perlakuan C (ablasi mata kanan) yaitu pertumbuhan gonad mencapai 21,53% dan terendah terjadi  D (tanpa ablasi)  pertumbuhan gonad hanya 14,8%. Analisa statistik dengan uji F menunjukan bahwa ablasi mata berpengaruh terhadap kecepatan kematangan gonad kepiting bakau. Pertambahan bobot tertinggi  terdapat pada perlakuan C (ablasi mata kanan) yaitu sebesar 2,67 gr kemudian disusul oleh D (tanpa ablasi)  sebesar 1,89 gr  dan terakhir  pada B (ablasi mata kiri) dengan nilai rata-rata sebesar 0,77 gr. Tingkat kelangsungan hidup terbaik terdapat pada perlakuan D (tanpa ablasi)   yaitu 100%, perlakuan B (ablasi mata kiri) 77,77%, perlakuan C (ablasi mata kanan) 66,66% dan kelansungan hidup terendah terjadi pada perlakuan A (ablasi satu pasang mata) 0%. Rata-rata kualitas air selama penelitian adalah suhu 27 0C dan Ph 7,65.Mangrove crab (Scylla serrata) have been classifying in Crustaceae clas that containing high animal protein and high economic value. Ablation of the eye is an solution to eliminate the egg development (gonads) barriers in the mangrove crab. The research design used a completely randomized design (CRD) non- factorial with 4 treatments and 3 replications. Treatment in this study were the treatment of A (ablation of the pairs of eyes), treatment B (left eye ablation), treatment C (right eye ablation), D (without ablation). The results showed that the highest rate of gonadal maturation was in treatment C (right eye ablation) where gonadal development growth reached 21.53 %, whereas the lowest was in treatment D (without ablation) where gonadal development growth was only 14.8 %. Statistical analysis by F test showed that ablation of the eye was affected the mud crab gonadal maturity. The Weight gain was found highest in the treatment C (right eye ablation) that reached 2.67 g and followed by treatment D (without ablation) 1.89 grams and the last in the treatment B (left eye ablation) with was an average value 0.77 grams. The higest survival rate was found in treatment D (without ablation) 100 %, treatment B (left eye ablation) 77.77 %, treatment C (right eye ablation) 66.66 % and the lowest survival rate was occurred in treatment A (ablation of the pairs of eyes) 0 %. The avarge values of water quality during the study showed that the temperature was reched 27 0C and pH was 7, 65.

scholarly journals Carapace Width -Weight Relationship Of Mud Crab Scylla Serrata (Forskal, 1775) Collected From Pulicat Lake, Tamilnadu, India

2016 ◽  
Vol 5 (1) ◽  
pp. 29
Author(s):  
V. Lakshme Gayathre ◽  
S. Felix ◽  
R. Durairaja
Keyword(s):  
Body Weight ◽  
Growth Pattern ◽  
Tamil Nadu ◽  
Carapace Width ◽  
Scylla Serrata ◽  
Mud Crab ◽  
Pulicat Lake ◽  
Weight Relationship ◽  
Relationship Of ◽  
The Relationship

<div><p><em>Mud crab Scylla serrata form an important fishery in the Pulicat lake, Tamilnadu. In the present study the relationship between carapace width and body weight were estimated as <strong>(Log W= -0.342438+2.914702)</strong>. The estimated <strong>‘a’</strong> and <strong>‘b’</strong> value for carapace width and body weight were <strong>-0.342438</strong> and <strong>2.914702</strong>, respectively. The result showed an isometric growth pattern and significant differences were found between carapace width and body weight in the mud crab collected from Pulicat lake, Tamil Nadu, India. </em></p></div>

scholarly journals Kajian Struktur Ukuran Dan Parametr Populasi Kepiting Bakau (Scylla serrata) di Ekosistem Mangrove Teluk Bintan, Kepulauan Riau

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
M. Tahmid, Achmad Fahrudin Dan Yusli Wardiatno
Keyword(s):  
Growth Parameters ◽  
Economic Value ◽  
Data Retrieval ◽  
Fishing Effort ◽  
Scylla Serrata ◽  
Small Scale ◽  
Natural Mortality ◽  
Mud Crab ◽  
Mangrove Crab ◽  
The Status

ABSTRAKKepiting bakau (Scylla serrata) merupakan salah satu potensi komoditas perikanan skala kecilyang memiliki nilai ekonomi tinggi. Kelimpahan populasi dipengaruhi oleh upaya penangkapan dankondisi ekosistem mangrove sebagai habitat utamanya. Produksi kepiting bakau di Teluk Bintanmenurun dan penyebabnya belum diketahui dengan pasti. Oleh karena itu, perlu dilakukan kajiantentang biologi kepiting bakau di Teluk Bintan. Penelitian ini bertujuan untuk mengkaji statuspopulasi kepiting bakau yang meliputi struktur ukuran, parameter pertumbuhan dan laju mortalitasdan eksploitasi. Pengambilan data kepiting bakau dilakukan dengan pendekatan yaitu fisher-basedsurvey. Hasil penelitian menunjukkan ukuran kepiting bakau yang tertangkap mulai dari lebar karapas(CW) 64-172 mm, ukuran fase muda kepiting jantan yang tertangkap mencapai 46,62% dan betinamencapai 48,06%, keduanya hampir setengah dari tangkapan total, ini menunjukkan bahwa alattangkap yang digunakan belum selektif. CW∞ jantan mencapai 176,93 mm lebih tinggi dari kepitingbetina sebesar 169,58 mm, namun sebaliknya nilai koefesien K jantan (0,360) lebih kecil dari betina(0,390), sehingga pertumbuhan kepiting bakau betina lebih cepat dari jantan. Perkiraan angkakematian alami (M) jantan = 0,5566 dan kematian akibat penangkapan (F) jantan = 0,6434 sedangkanM betina = 0,59 dan F betina = 0,41. Laju eksploitasi (E) kepiting jantan mencapai 53,62%, ini dapatdikatakan telah terjadi lebih tangkap atau over eksploitasi.Kata kunci: Scylla serrata, parameter pertumbuhan, struktur ukuran, mangrove and Teluk BintanABSTRACTMud crab (Scylla serrata) is one of the potential of small-scale fishery commodities that havehigh economic value. The abundance of the population is affected by the fishing effort and conditionsmangrove ecosystem as its main habitat. Mud crab production in the Gulf of Bintan declined and thecause is not known with certainty. Therefore, it is necessary to study on the biology of mud crab in theGulf of Bintan. This study aims to assess the status of mangrove crab population that includes the sizestructure, parameters of growth and the rate of mortality and exploitation. Data retrieval is done witha mangrove crab fisher-based survey. The results showed that the size of mud crab caught fromcarapace width (CW) 64-172 mm, the size of the young phase male crabs caught females reached46.62% and reached 48.06%, both are almost half of the total catch, it indicates that fishing gearused is not selective. CW∞ males reach 176.93 mm higher than the female crabs of 169.58 mm, butinstead value koefesien K males (0.360) is smaller than females (0.390), so that the growth of femalemud crabs faster than males. Estimated natural mortality rates (M) male = 0.5566 and deaths fromarrest (F) male = 0.6434 while M females female F = 0.59 and = 0.41. The rate of exploitation (E)male crabs reached 53.62%, can be said to have occurred over fishing or over-exploitation.Keywords: Scylla serrata, growth parameters, structure size, mangrove and bay Bintan

scholarly journals PARAMETER POPULASI KEPITING BAKAU (Scylla serrata) DI PERAIRAN PASAMAN BARAT

2018 ◽  
Vol 9 (3) ◽  
pp. 207
Author(s):  
Thomas Hidayat ◽  
Helman Nur Yusuf ◽  
Nurulludin Nurulludin ◽  
Andina Ramadhani Putri Pane
Keyword(s):  
Economic Value ◽  
Total Mortality ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Population Parameter ◽  
Fishing Mortality ◽  
Mud Crab ◽  
Exploitation Rate ◽  
Long Time ◽  
Mud Crabs

Pemanfaatan sumber daya kepiting bakau (Scylla serrata) di perairan Pasaman Barat sudah lama dilakukan oleh nelayan kecil dengan menggunakan bubu (tangkul) yang bersifat tidak selektif. Sebagai komoditi perikanan yang mempunyai nilai ekonomis penting di Indonesia, perlu dilakukan pengelolaan yang tepat agar ketersediaannya tetap berkelanjutan. Penelitian dilaksanakan bulan Januari - November 2016, dengan tujuan mengkaji beberapa parameter populasi sebagai bahan kebijakan pengelolaan kepiting bakau di perairan Pasaman Barat agar tetap lestari. Pengumpulan sampel dilakukan secara acak dari hasil tangkapan nelayan oleh enumerator. Metode analisis parameter populasi menggunakan distribusi frekwensi lebar karapas dengan bantuan program FiSAT (FAO-ICLARM Stock Assessement Tools)-II. Hasil analisis diperoleh laju pertumbuhan (K) sebesar 0,63 pertahun, (CW)= 178,5 mm, kematian alami (M) 1,06 pertahun, kematian karena penangkapan (F)= 1,03 per tahun, dan kematian total (Z)=2,09 pertahun. Tingkat eksploitasi (E) =0,49. Tingkat pemanfaatan kepiting bakau di perairan Pasaman Barat sudah pada tahapan yang jenuh (fully exploited). Pembatasan alat tangkap merupakan opsi yang paling memungkinkan.Mud crab (Scylla serrata) is one of fisheries commodity that has an important economic value in Indonesia. Utilization of mud crabs in West Pasaman had been exploited for years long time with traps fishing gear. The research was conducted in January - November 2016 in the waters of West Pasaman. Sampling were conducted randomly. This paper aims to determine some population parameters of mud crab to used as a guidance guidance in the management of mud crab. in the waters of West Pasaman. Population parameter data analysis using software FiSAT (FAO-ICLARM Stock assessement Tools) II. The results of population dynamic parameters of mud crab showed that growth rate (K) was 0.63 per year, Length infinity (L) was 178.5 mm, natural mortality (M) was 1.06 per year, fishing mortality (F) was 1.03 per year, and total mortality (Z) 2.09 per year. Exploitation rate (E) was 0.49. The exploitation rate of mud crabs in the waters of West Pasaman were (fully exploited), the fishing need to be managed carefully, limitation of fishing gear is the most likely option to be enforced.

scholarly journals Morphoregression and length-weight relationship of Bali sardinella, Sardinella lemuru Bleeker 1853 in Bali Strait Waters

2019 ◽  
Vol 18 (3) ◽  
pp. 275
Author(s):  
Nyoman Dati Pertami ◽  
M.F. Rahardjo ◽  
Ario Damar ◽  
I.W. Nurjaya
Keyword(s):  
Standard Length ◽  
Average Length ◽  
Economic Value ◽  
Fork Length ◽  
Growth Patterns ◽  
Length Measurement ◽  
Weight Relationship ◽  
Total Length ◽  
Relationship Of ◽  
The Relationship

Bali Sardinella, Sardinella lemuru Bleeker 1853, included in small pelagic groups which have an important economic value. The production of Bali Sardinella was the highest among the other small pelagic fish in Bali Strait waters. The morphoregression and length-weight relationship are important to be known to facilitate the conversion between a length measurement to another type of length measurement and the weight. The aims of this research were to reveal the relationship between total length (TL) and standard length (SL), total length and fork length (FL), fork length and standard length, and the length-weight. The research was held in Bali Strait waters from March 2017 – Mei 2018. The morphoregression was analyzed using simple linear regression, whereas the length-weight relationship using power regression. A total of 470 individuals of Bali sardinella were collected during the study period. The fish that analyzed have a length range 9.7 –20.2 cm TL. The average length of Bali sardinella was13.7 cm. The relationship between total length (TL) and standard length (SL); total length (TL) and fork length (FL); fork length (FL) and standard length (SL) for Bali sardinella respectively were TL = 1.1038SL + 0.9313; TL = 1.0861FL + 0.2967; and FL = 1.0068SL + 0.6936, respectively. The value of b which were generated from the length-weight relationship of Bali Sardinella was 3.22 with the growth patterns were positive allometric.AbstrakIkan lemuru, Sardinella lemuru Bleeker 1853, termasuk dalam kelompok ikan pelagis kecil yang bernilai ekonomis tinggi. Dibandingkan dengan jenis pelagis kecil lainnya, hasil tangkapan ikan lemuru  lebih dominan di perairan Selat Bali. Persamaan morforegresi dan hubungan panjang bobot penting untuk diketahui sehingga mudah melakukan kon-versi dari satu jenis panjang ke jenis panjang lain dan bobotnya. Penelitian ini bertujuan untuk mengungkap hubungan antara panjang total (PT) dengan panjang baku (PB), panjang total dengan panjang cagak (PC), panjang cagak dengan panjang baku, serta hubungan panjang bobot ikan lemuru. Penelitian dilaksanakan di perairan Selat Bali kurun waktu Maret 2017 – Mei 2018. Morforegresi dianalisis menggunakan regresi linear sederhana, sedangkan hubungan panjang bobot dianalisis menggunakan regresi power. Ikan lemuru (Sardinella lemuru Bleeker 1853) yang dikumpulkan selama penelitian berjumlah 470 ekor. Ikan yang dianalisis memiliki kisaran panjang antara 9,7 – 20,2 cm PT. Panjang rata-rata ikan lemuru adalah 13,7 cm. Hubungan antara panjang total (PT) dan panjang baku (PB); panjang total (PT) dan pan-jang cagak (PC); panjang cagak (PC) dan panjang baku (PB) ikan lemuru secara berturut-turut adalah PT = 1,1038 PB + 0,9313; PT = 1,0861 PC + 0,2967; and PC = 1,0068 PB + 0,6936. Nilai b yang terbentuk pada hubungan panjang bobot ikan lemuru adalah 3,22  dengan pola pertumbuhan adalah allometrik positif.

scholarly journals Distribusi Scylla spp. di perairan estuari Sungai Donan Segara Anakan Bagian Timur, Cilacap

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Sulistiono Sulistiono ◽  
Nurul Musyariafah Yahya ◽  
Etty Riani
Keyword(s):  
Economic Value ◽  
Scylla Serrata ◽  
Mangrove Forests ◽  
Mud Crab ◽  
Mangrove Species ◽  
Central Java ◽  
Rhizophora Apiculata ◽  
Mangrove Ecosystems ◽  
Avicennia Alba ◽  
Mangrove Crabs

Mangrove forests are ecosystems that make up coastal areas and river estuaries. The examples of mangrove ecosystems found in Indonesia are in Segara Anakan, Central Java. One of the aquatic biota with the economic value found in the mangrove forest ecosystem is the mud crab (Scylla spp.). The purpose of this study was to assess the distribution of mangrove crabs (Scylla spp.) to the presence of mangrove species in the mouth of the Donan River, Segara Anakan. A sampling of crabs and observations of mangrove vegetation were carried out at five stations spread from the river to the sea. The results showed that there were three types of mangrove crabs caught in the vicinity of the study, namely Scylla tranquebarica, S. olivacea, and S. serrata. The types of mangroves found include Rhizophora apiculata, R. mucronata, Avicennia rumphiana, A. alba, A. officinalis, and Nypa. Regression analysis showed that mangrove density correlated with the abundance of Scylla tranquebarica and Scylla olivacea, but contradicts the abundance of Scylla serrate. PCA analysis showed that the Crab species Scylla tranquebarica and Scylla olivacea were associated with mangroves of Avicennia alba, Avicennia rumphiana, and Rhizophora apiculata. Meanwhile, Scylla serrata crabs are associated with Avicennia officinalis.

scholarly journals Pengaruh ekstrak minyak cumi pada umpan bubu terhadap hasil tangkapan kepiting bakau dan rajungan di Perairan Malise Kecamatan Tabukan Tengah

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Maichel Arvan Pananggung ◽  
Ivor L. Labaro ◽  
Emil Reppie
Keyword(s):  
Coastal Waters ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Mangrove Crab ◽  
Gill Net ◽  
Oil Extract ◽  
Mangrove Crabs ◽  
By Catch

ABSTRACT Mangrove crab (Scylla serrata) and swimming crab (Portunus pelagicus) are economically important marine commodities produced from the coastal waters of Sangihe Islands Regency. But those marine commodity products are usually only caught accidentally with a bottom gill net. There has been a special trap fishing gear for that resources, but not known well by local fishermen. Addition of squid oil extraction baits could increase the fishing power of mangrove crab and swimming crab traps. This research aims to study the effect of squid oil extract on traps bait to catch mangrove crab and swimming crab; and identify the types of biota captured. This research was done in coastal waters of Malise village, Tabukan Tengah District of Sangihe Islands Regency for 2 weeks September 2015; based on experimental method. Six unit traps were operated ten trips where three units of them used scad mackerel bait that injected with squid oil extract, and tree other units just used scad mackerel bait without extract; and the capture data were analyzed using t test. The catch was 142 individuals (135 mangrove crabs and 7 swimming crab); where 86 crabs was caught by scad mackerel bait with squid oil extract, and 56 crabs caught with bait without squid oil extract. The analysis showed that the use of squid oil extracts on trap baits increased the catch. Keywords: mangrove crab, swimming crab,trap baits, squid oil extract, Sangihe   ABSTRAK[1] Kepiting bakau (Scylla serrata) dan rajungan (Portunus pelagicus) merupakan komoditi hasil laut ekonomis penting yang dihasilkan dari perairan pantai Kabupaten Kepulauan Sangihe. Tetapi komoditi hasil laut tersebut biasanya hanya tertangkap tanpa sengaja (by catch) dengan jaring insang dasar. Sebenarnya telah ada alat tangkap bubu khusus untuk kepiting bakau dan rajungan, tetapi belum dikenal oleh nelayan lokal. Pemberian ekstrak minyak cumi pada umpan, diduga dapat meningkatkan kemampuan tangkap dari bubu kepiting bakau dan rajungan. Penelitian ini bertujuan untuk mempelajari pengaruh ekstrak minyak cumi pada umpan bubu terhadap hasil tangkapan kepiting bakau dan rajungan, dan mengidentifikasi jenis-jenis biota yang tertangkap. Penelitian ini dilakukan di perairan Malise Kecamatan Tabukan Tengah, Kabupaten Kepulauan Sangihe; selama 2 minggu pada bulan September 2015; yang didasarkan pada metode eksperimental. Enam unit bubu dioperasikan selama sepuluh trip untuk mengumpulkan data; di mana tiga unit menggunakan umpan ikan layang yang disuntikan ekstrak minyak cumi, dan tiga unit lainnya hanya menggunakan umpan ikan laying tanpa ekstrak; dan data dianalisis dengan uji t. Tangkapan total berjumlah 142 ekor (135 ekor kepiting bakau dan 7 ekor rajungan); di mana 86 ekor tertangkap dengan umpan layang yang diberi ekstrak minyak cumi, dan 56 ekor tertangkap dengan umpan tanpa ekstrak. Hasil analisis menunjukkan bahwa penggunaan ekstrak minyak cumi pada umpan bubu, memberikan hasil tangkapan yang sangat berbeda dibandingkan dengan umpan tanpa ekstrak minyak cumi. Kata-kata kunci: kepiting bakau, rajungan, umpan bubu, ekstrak minyak cumi, Sangihe  

The use of growth patterns of muscle measurements, chemical data, energy, and muscle weights to differentiate between normal and recovering muscle

1973 ◽  
Vol 24 (2) ◽  
pp. 279 ◽  
Author(s):  
CL Lohse ◽  
WJ Pryor ◽  
RM Butterfield
Keyword(s):  
Recovery Phase ◽  
Growth Patterns ◽  
Area Measurement ◽  
Linear Measurements ◽  
Muscle Weight ◽  
Live Animal ◽  
Cross Sectional ◽  
Relationship Of ◽  
The Relationship ◽  
Total Muscle

Twenty-eight Peppin Merino wethers were equally divided into two groups, a continuously grown group and a group which suffered a 6-week period of liveweight loss followed by recovery. Wethers in the continuously grown group were slaughtered over a range of liveweights; wethers in the restricted group were slaughtered over the same range of liveweights during the recovery phase. Each animal was totally dissected and individual muscles weighed. Several linear measurements and a cross-sectional area measurement were made of the longissimus muscle (M. longissimus thoracis et lumborum). Dry matter, ether extract, nitrogen, and energy measurements were determined for the total muscle tissue. The relationship of the high impetus and low impetus muscles to total muscle weight was determined. No significant effects of treatment were shown on any of the M. longissimus measurements nor on the chemical and energy values. The relationship of the weight of the low impetus muscles to that of total muscle was not significantly different between groups, but the same relationship for the high impetus muscles was highly significantly different. It is concluded that the weight relationship of high impetus muscles to total muscle is a sensitive test to differentiate between normal and recovering muscle. It cannot of course be applied in the live animal.

scholarly journals A study of approach to assessing a functional relationship between solidity ratios for the rope/net part of midwater trawl

2020 ◽  
Vol 200 (3) ◽  
pp. 656-670
Author(s):  
L. M. Simkin
Keyword(s):  
Functional Relationship ◽  
Fishing Gear ◽  
Mathematical Relationship ◽  
Midwater Trawl ◽  
Existing Structures ◽  
Trawl Fishing ◽  
Relationship Of ◽  
Mathematical Relationships ◽  
The Relationship

In this paper we have analyzed an approach to assessing the relationship between some characteristics of the net panels forming the rope/net cone of a fishing trawl. Using the mathematical relationship of solidity ratios for the rope/net panels, it is possible to analyze existing structures and, furthermore, reduce the time for selecting the prototype trawl. Such mathematical relationship allows faster calculation of new trawl designs which takes into account the production specifics of an enterprise manufacturing the trawl fishing gear. The use of mathematical relationships provides the opportunity to accelerate the process of trawl construction.

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