scholarly journals BEBERAPA ASPEK BIOLOGI UDANG PUTIH (Penaeus indicus) DI PERAIRAN SEBELAH UTARA BREBES DAN TEGAL, JAWA TENGAH (Biological Aspects of White Shrimp (Penaeus Indicus) In the North Brebes and Tegal Waters, Central Java)

2017 ◽  
Vol 13 (1) ◽  
pp. 38
Author(s):  
Iin Ika Wahyuni ◽  
Anhar Solichin ◽  
Suradi Wijaya Saputra
Keyword(s):  
Fishing Effort ◽  
White Shrimp ◽  
Survey Method ◽  
The North ◽  
Central Java ◽  
Mean Size ◽  
Penaeus Indicus ◽  
Males And Females ◽  
Biological Aspects ◽  
Growth And Reproduction

 Salah satu potensi perikanan di perairan Brebes dan Tegal adalah Udang Putih yang terancam kelestariannya akibat meningkatnya penangkapan dengan Jaring Arad. Tujuan penelitian ini untuk mengetahui aspek biologi udang P. indicus dan status sumberdayanya, seperti komposisi hasil tangkapan, struktur ukuran, sifat pertumbuhan, dan aspek reproduksi. Metode penelitian yang digunakan yaitu metode survei. Sampel udang diambil 100% dari total hasil tangkapan tiap perahu karena hasil tangkapan kurang dari 100 ekor. Pengambilan sampel enam kali dari Juli-Desember 2016. Tempat pengambilan sampel di TPI Kluwut, Kaliwlingi, Larangan dan Surodadi. Hasil penelitian nilai L50%P. indicus di sebelah utara Brebes dan Tegal memiliki panjang total 84 mm dan 85 mm, nilai ½ L∞ yaitu 97 mm (jantan) dan 121 mm (betina). L50% < ½ L∞ berarti ukuran udang yang tertangkap masih kecil sehingga dikhawatirkan terjadinya growth overfishing. Sifat pertumbuhan udang jantan dan betina di Brebes yaitu isometrik (b=2,98) dan alometrik negatif (b=2,86), di Tegal yaitu alometrik positif (b= 3,43) dan isometrik (b= 3,02). Nilai faktor kondisi P. indicus di Brebes 1,63 (jantan) dan 1,59 (betina), sedangkan di Tegal 1,81 (jantan) dan 1,57 (betina). Perbandingan nisbah kelamin P. indicus di Brebes 1: 4,4 dan di Tegal 1: 2,9. Status tingkat pemanfaatan sumberdaya udang P. indicus di sebelah utara Brebes dan Tegal perlu penyempurnaan untuk memenuhi syarat perikanan yang berkelanjutan. One of the potential fishery in the Brebes and Tegal waters is P. Indicus shrimp that has been threatened by increasing fishing effort of Arad net. The purpose of this research to know biological aspects of P. indicus and resources status, such as composition of catch, size of structure, growth, and reproduction aspects. The method used is survey method. Shrimp samples were taken at random 10% of the total catch per boat. Sampling six times from July to December 2016. The sampling at TPI Kluwut, TPI Kaliwlingi, TPI Larangan and TPI Surodadi. The results of research L50% value of P. indicus in north Brebes and Tegal has 84 mm and 85 mm TL, ½ L∞ are 97 mm (males) and 121 mm (females). L50% <½ L∞ mean size of shrimp caught are ssmall to worry about the occurrence of growth overfishing. The growth of males and females shrimp in Brebes are isometric (b = 2.98) and negative allometric (b = 2.86), in Tegal growth of males and females are positive allometrik (b = 3.43) and isometric (b = 3.02). Condition factor P. indicus in Brebes are 1.63 (males) and 1.59 (females), whereas in Tegal are 1.81 (males) and 1.57 (females). Sex ratio P. indicus in Brebes 1: 4.4 and in Tegal 1: 2.9. Status of the level of resource P. indicus need improvement to qualify sustainable fisheries.  

scholarly journals Growth parameter, mortality, recruitment pattern, and exploitation rate of white shrimp Penaeus indicus in northern coastal waters of Western Central Java, Indonesia

2019 ◽  
Vol 20 (5) ◽  
Author(s):  
SURADI WIJAYA SAPUTRA ◽  
ANHAR SOLICHIN ◽  
WIWIET TEGUH TAUFANI ◽  
SITI RUDIYANTI ◽  
NINIEK WIDYORINI
Keyword(s):  
Carapace Length ◽  
Growth Parameters ◽  
Growth Parameter ◽  
White Shrimp ◽  
Survey Method ◽  
Northern Coast ◽  
Recruitment Pattern ◽  
Central Java ◽  
Exploitation Rate ◽  
Penaeus Indicus

Abstract. Saputra SW, Solichin A, Taufani WT, Rudiyanti S, Widyorini N. 2019. Growth parameter, mortality, recruitment pattern, and exploitation rate of white shrimp Penaeus indicus on the northern coast of Central Java, Indonesia. Biodiversitas 20: 1318-1324. The aims of this study were to know the growth parameters, first lenght captured (Lc), mortality, recruitment pattern, and the exploitation rate of white shrimp (Penaeus indicus H.Milne Edwards, 1837) in the Western Coastal North Central Java Sea, Indonesia. Samples were collected from May 2016 to July 2017 using survey method and direct observations on fishing unit areas. The results showed that the relationship of the carapace length and weight is allometric. Based on the estimates of von Bertalanffy growth equation to the carapace length, the growth parameters of CL∞ and K values in male were 37 mm and 0.97, while in female were 38.5 mm and 0.85. While, the rates of total mortality (Z), natural mortality (M), and fishing mortality (F) were 3.5, 1.67, and 1.84 for males, and 5.03, 1.51, and 3.52 for females, respectively. The exploitation rate (E) of male shrimp was 0.52 and of female was 0.7 indicating that female shrimp get higher capture pressure than the males. It also showed that the rate of exploitation has to exceed the optimum sustainable yield (E>0.5). Time recruitment occurred throughout the year, with two peak seasons, i.e., in April-June and September-November. Moreover, the length of the carapace during recruitment was 15-20 mm. While the carapace length of the first caught (CL∞50) was 18.3 mm for male and 17.6 mm for female indicating that the P. indicus caught was still in the small size, as well as below the first mature gonad (CLm50 = 22-39 mm). This is because the mesh size of cod-end is 0.75 inches or about 2 cm.

scholarly journals ASPEK BIOLOGI UDANG Metapenaeus tenuipes DI PERAIRAN PEMALANG, JAWA TENGAH Biological Aspect Assessment of Metapenaeus tenuipes Shrimp on Pemalang, Central Java

2020 ◽  
Vol 8 (4) ◽  
pp. 347-355
Author(s):  
Aida Tri Yulianti ◽  
Anhar Solichin ◽  
Suradi Wijaya Saputra
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Growth Characteristic ◽  
Survey Method ◽  
Systematic Random Sampling ◽  
Male And Female ◽  
Central Java ◽  
Biological Aspects ◽  
Level I ◽  
Growth And Reproduction

Kabupaten Pemalang merupakan wilayah yang memiliki potensi perikanan, salah satunya udang Metapenaeus tenuipes. Meningkatnya penangkapan dengan jaring Arad akan mengancam kelestariannya. Tujuan penelitian ini yaitu mengetahui aspek biologi udang M. tenuipes dan status sumberdayanya seperti struktur ukuran, sifat pertumbuhan, dan aspek reproduksi. Metode yang digunakan yaitu metode survei. Metode pengambilan sampel yang dilakukan adalah systematic random sampling. Pengambilan sampel dilakukan empat kali dari bulan Mei-Agustus 2016. Tempat pengambilan sampel di TPI Tanjungsari dan TPI Asemdoyong. Hasil penelitian menunjukkan nilai L50% M. tenuipes jantan 71 mm dan betina 81 mm, ½ L∞ jantan yaitu 60 mm dan betina 75 mm. L50% > 1/2 L∞ berarti ukuran udang yang tertangkap sudah cukup besar sehingga layak tangkap. Sifat pertumbuhan udang jantan dan betina yaitu alometrik negatif (pertumbuhan panjang lebih cepat dibandingkan berat). Nilai faktor kondisi M.tenuipes menunjukan udang betina lebih montok. Tingkat Kematangan Gonad udang M. tenuipes jantan dan betina tebanyak terdapat pada tingkatan I. Perbandingan nisbah kelamin M. tenuipes di Pemalang 1 : 1,33 dengan nisbah tersebut proses reproduksi akan berjalan baik Pemalang is area that has potential one of fishery Metapenaeus tenuipes. Increased netting Arad would threaten its sustainability. The purpose of the research to know biological aspects of M. tenuipes and resourch status, size of structure, growth, and reproduction aspects. The method used is a survey method. The sampling method used was systematic random sampling. Sampling was carried out four times from May-August 2016. The sampling sites were at TPs Tanjungsari and TPI Asemdoyong. The results showed that the L50% value of M. tenuipes was 71 mm in males and 81 mm in females, ½ L in males in 60 mm and 75 mm in females. L50%> 1/2 L∞ means that the size of the shrimp caught is large enough to be suitable for capture. The growth characteristic of male and female shrimp is negative allometrics (long growth is faster than weight). The factor value of M.tenuipes shows that female shrimp are more plump. Maturity Levels of male and female M. tenuipes shrimp found in level I. Comparison of M. tenuipes genital ratio in Pemalang 1: 1,33 with that ratio will reproduce well. 

scholarly journals ASPEK BIOLOGI DAN PARAMETER POPULASI UDANG JINGA (Metapenaeus affinis H. Milne Edwards, 1837) DI PERAIRAN KOTABARU, KALIMANTAN SELATAN

2017 ◽  
Vol 9 (1) ◽  
pp. 11
Author(s):  
Tirtadanu Tirtadanu ◽  
Suprapto Suprapto ◽  
Ali Suman
Keyword(s):  
Growth Parameters ◽  
Growth Function ◽  
Fishing Effort ◽  
Population Parameters ◽  
Male And Female ◽  
Management Measures ◽  
Exploitation Rate ◽  
Mean Size ◽  
Biological Aspects ◽  
The Mean

Udang jinga (Metapenaeus affinis H. Milne Edwards, 1837) merupakan salah satu jenis udang ekonomis penting yang diusahakan di perairan Kotabaru dan saat ini produksinya cenderung mengalami penurunan. Salah satu data dan informasi yang diperlukan dalam mengkaji tingkat pemanfaatan dan dasar pengelolaannya adalah aspek biologi dan parameter populasi. Penelitian ini bertujuan mengkaji aspek biologi dan parameter populasi udang jinga sebagai bahan kebijakan pengelolaan perikanan udang di perairan Kotabaru, Kalimantan Selatan. Penelitian dilakukan pada bulan Januari – November 2016 di perairan Kotabaru. Parameter pertumbuhan diestimasi berdasarkan pergeseran modus struktur ukuran panjang dengan metode ELEFAN I. Hasil penelitian menunjukkan rata-rata ukuran udang jinga (M. affinis) betina yang tertangkap adalah 23,6 ± 3,45 mmCL dengan modus ukuran 24 mmCL dan rata-rata ukuran udang jantan adalah 20,7 ± 2,9 mm dengan modus ukuran 18 mmCL. Nisbah kelamin udang jinga jantan dan betina adalah 1 : 2,5. Musim pemijahan udang jinga diduga berlangsung sepanjang tahun dan puncak pada bulan Maret. Ukuran rata-rata pertama kali tertangkap (Lc) udang lebih kecil dari ukuran rata-rata pertama kali matang gonad (Lm) (21,7 < 28,5 mm CL) sehingga sebagian besar udang tertangkap berukuran kecil dan belum memijah. Persamaan pertumbuhan udang jinga jantan  CL(t)=35,95(1-e-2.02(t+0,31) dan udang jinga betina CL(t)= 38,3(1-e-1,92(t+0,29)). Tingkat pemanfaatan udang (E) menunjukkan lebih tangkap (overfishing) yakni 0,70/tahun pada jantan dan 0,73/tahun pada betina. Dengan demikian disarankan untuk melakukan pengurangan upaya penangkapan sebesar 40% dan penutupan musim penangkapan di bulan Maret.The jinga shrimp (Metapenaeus affinis H. Milne Edwards, 1837) was one of important commodity that was exploited in Kotabaru Waters, yet the production tend to be declined recently. The data and information on biological aspects and population parameters are needed to investigate the exploitation level and the basis of management measures. This research aims to investigate the biological aspects and population parameters of jinga shrimp Kotabaru waters, South of Kalimantan. This research was conducted on January – November 2016. The growth parameters were estimated as movement of length frequency mode by ELEFAN I method. The results showed that the mean size of female jinga shrimp (M. affinis) was 23,6 ± 3,45 mm CL and the mode was 24 mmCL. While, the mean size of male jinga shrimp was 20,7 ± 2.9 mm CL and the mode was 18 mmCL. The sex ratio of male and female shrimp was 1 : 2,5 . Spawning season of jinga shrimp was estimated throughout the year and the peak was in March. The length at first captured (Lc) was shorter than length at first matured (Lm) (21,7 < 28,5 mm CL). That means most of the catches was immature. The growth function of male and female jinga shrimp were and, CL(t)=35,95(1-e-2.02(t+0,31) respectively and CL(t)= 38,3(1-e-1,92(t+0,29)). The exploitation rate (E) of male and female shrimp fishing were  0,70/year 0,73/year, respectively. The reduction of fishing effort needed by 40% of the actual combined with the temporal fishing closure March.

scholarly journals ASPEK BIOLOGI UDANG Metapenaeus conjunctus DI PERAIRAN BATANG DAN KENDAL, JAWA TENGAH (Biological Aspect Assessment of Metapenaeus conjunctus Shrimp on Batang and Kendal Waters, Central Java)

2018 ◽  
Vol 6 (4) ◽  
pp. 358-366
Author(s):  
Soraya Chandra Monica ◽  
Suradi Wijaya Saputra ◽  
Anhar Solichin
Keyword(s):  
Penaeid Shrimp ◽  
Mesh Size ◽  
Primary Data ◽  
Survey Method ◽  
Total Catch ◽  
Biological Aspect ◽  
Male And Female ◽  
Stock Status ◽  
Central Java ◽  
Biological Aspects

Udang penaeid di perairan utara Jawa banyak tertangkap nelayan, salah satunya udang Metapenaeus conjunctus. Jumlah produksi udang M. conjunctus di perairan Kendal dan Batang tidak tercatat dengan baik, karena tidak semuanya dilelang. Penangkapan udang menggunakan jaring arad dengan mesh size 19,05 mm. Perlu dilakukan pengkajian terhadap aspek biologi udang M. conjunctus di perairan Kendal dan Batang. Tujuan penelitian ini adalah mengetahui aspek biologi dari udang M. conjunctus di kedua perairan tersebut. Hasil penelitian tersebut dapat digunakan untuk menduga status stok sumberdaya udang M. conjunctus. Pengambilan sampel penelitian dilakukan di TPI Bandengan Kendal, TPI Tawang Kendal, dan TPI Roban Batang pada September 2016 - Januari 2017. Metode yang digunakan adalah metode survey. Sampel yang diambil sebanyak 10% dari total hasil tangkapan dalam sekali penangkapan. Data primer yang dikumpulkan yaitu data panjang karapas dan panjang total, berat udang, TKG, dan mesh size. Hasil penelitian menunjukkan udang betina jauh lebih banyak jumlahnya dibanding udang jantan baik di perairan Kendal maupun perairan Batang. Nilai L50% udang jantan 77 mm dan udang betina 73 mm. Sifat pertumbuhan udang jantan di perairan Kendal bersifat allometrik negatif dengan nilai b = 2,881 dan udang betina bersifat isometrik dengan nilai b = 3,029, sedangkan di perairan Batang udang jantan dan udang betina bersifat isometrik dengan nilai b = 2,911 dan b = 3,033. Nilai faktor kondisi udang jantan dan betina rata-rata memiliki kemontokan yang sama. Udang jantan dan betina di perairan Kendal 1,089 dan 0,845, sedangkan di perairan Batang untuk udang jantan 0,827 dan udang betina 1. Udang M. conjunctus belum ada yang matang gonad. Penaeid shrimp in Java's northern waters was caught by many fishermen; one of them is Metapenaeus conjunctus shrimp. The number of M. conjunctus shrimp production in Kendal and Batang waters is not well recorded, because not all of them are auctioned. Catching shrimp is using arad net with mesh size 19,05 mm. An assessment of the biological aspects of M. conjunctus shrimp in Kendal and Batang waters is required. The purpose of this research is to know the biological aspects of shrimp M. conjunctus in both waters. The results of  this study was to determine the stock status of shrimp resources M. conjunctus. The sampling was conducted at TPI Bandengan Kendal, TPI Tawang Kendal, and TPI Roban Batang in September 2016 - January 2017. The method used was survey method. 10% of total catch in one catch was taken as a sample. The primary data collected were data of  length of carapace and total length, shrimp weight, TKG, and mesh size. The result showed that female shrimp is much more numerous than the male shrimp both in waters of Kendal and Batang waters. The L50%’s value of male shrimp is  77 mm and female shrimp  is 73 mm. The characteristic of male shrimps growth in Kendal is allometric  negative with b = 2,881 and female shrimp is isometric with b = 3.029, while in the Batang the male shrimps and female shrimps are isometric with b = 2,911 and b = 3,033. The value factor of the male and female shrimp condition on average has the same plumage. Male and female shrimp in Kendal waters 1,089 and 0.845, while in Batang waters for male shrimp 0.827 and female shrimp 1. M. conjunctus shrimp has not been ripe gonad.

scholarly journals KOMPOSISI DAN BEBERAPA ASPEK BIOLOGI SPESIES UDANG PENAEID DI PERAIRAN BATANG DAN KENDAL, JAWA TENGAH (Composition And Several Biological Aspect of Penaeid Shrimp in Batang And Kendal Water, Central Java)

2018 ◽  
Vol 6 (4) ◽  
pp. 423-432
Author(s):  
Verina Sari ◽  
Anhar Solichin ◽  
Suradi Wijaya Saputra
Keyword(s):  
Size Structure ◽  
Growth Characteristic ◽  
Penaeid Shrimp ◽  
Survey Method ◽  
North Coast ◽  
Allometric Growth ◽  
Biological Aspect ◽  
Central Java ◽  
Penaeus Indicus ◽  
Penaeus Merguiensis

Kabupaten Batang dan Kendal merupakan daerah dalam  satu jalur perairan Pantai Utara Jawa yang memiliki potensi  sumberdaya udang. Tujuan penelitian ini adalah untuk mengetahui komposisi dan beberapa aspek biologi  udang penaeid yang tertangkap di perairan Batang dan Kendal ditinjau dari pengamatan struktur ukuran, sifat pertumbuhan dan aspek reproduksi. Metode penelitian yang digunakan adalah metode survei. Sampel udang diambil secara acak sebanyak 10% dari total hasil tangkapan. Pengambilan sampel sebulan sekali dalam 3 bulan. Tempat pengambilan sampel di TPI Roban, TPI Tawang dan TPI Bandengan. Komposisi hasil tangkapan udang pada bulan Agustus 2016 sampai bulan Oktober 2016 di Perairan Batang ditemukan 5 spesies udang yang dominan tertangkap  yaitu, Metapenaeopsis barbata (69%), Trachypenaeus longipes (16%), Metapenaeus  conjunctus (9%), Penaeus merguiensis (6%), dan Metapenaeus tenuipes (0,001%), sedangkan di Perairan Kendal ditemukan 6 spesies udang yaitu  Penaeus indicus (40%), Metapenaeus  conjunctus (22%), Penaeus merguiensis 17%, Metapenaeopsis barbata (14%), Metapenaeus tenuipes (5%), dan Trachypeneus longipes (2%). Berdasarkan pengamatan hasil tangkapan udang, TPI Tawang terdapat 6 spesies yaitu M. barbata, M. conjunctus, P. merguiensis, T. longipes, M. tenuipes dan P. indicus. TPI Roban terdapat 5 spesies yaitu M. barbata, M. conjunctus, P. merguiensis, T. longipes, dan M. tenuipes. Dan TPI Bandengan terdapat 4 spesies yaitu M. conjunctus, P. merguiensis, M. tenuipes dan P. indicus. Hasil tangkapan terbanyak untuk spesies udang M. barbata di TPI Roban (70%), M. conjunctus di TPI Bandengan (48%), P. merguiensis di TPI Bandengan (69%), M. tenuipes di TPI Bandengan (93%), T. longipes di TPI Roban (80%), dan P. indicus di TPI Bandengan (78%). Ukuran yang sering tertangkap tiap bulan berbeda-beda, pola pertumbuhan mayoritas allometrik positif, sebagian besar udang yang tertangkap belum matang gonad, Perbandingan nisbah kelamin menunjukkan bahwa jumlah udang betina lebih banyak ditemukan dibandingkan udang jantan. Batang and Kendal regency is an area in one lane waters of North Coast of Java that have the potential of fishery resources, especially shrimp. The purpose of this study is to know the composition and biology aspect of penaeids shrimp in Batang and Kendal waters from observation of size structure, growth characteristic and reproduction aspect. This research method is survey method. 10% of shrimp samples taken at random from the total catch. Sampling once a month in 3 months. Sampling at TPI Roban, TPI Tawang and TPI Bandengan. The composition of the shrimp catches in August 2016 to October 2016 in Batang waters found 5 species, ie Metapenaeopsis barbata (69%), Trachypenaeus longipes (16%), Metapenaeus conjunctus (9%), Penaeus merguiensis (6%), and Metapenaeus tenuipes (0,001%), Kendal waters found 6 species of shrimp that is Penaeus indicus (40%), Metapenaeus conjunctus (22%), Penaeus merguiensis (17%), Metapenaeopsis barbata (14%), Metapenaeus tenuipes (5%), and Trachypeneus longipes (2%). Based on the observation of shrimp catch, there are 6 species in TPI Tawang, they are M. barbata, M. conjunctus, P. merguiensis, T. longipes, M. tenuipes and P. indicus. There are 5 species of shrimp  in TPI Roban, they are M. barbata, M. conjunctus, P. merguiensis, T. longipes, and M. tenuipes. There are 4 species of shrimp in TPI bandengan, they are M. conjunctus, P. merguiensis, M. tenuipes and P. indicus. The largest distribution of catches for species M. barbata in TPI Roban (70%), M. conjunctus in TPI Bandengan (48%), P. merguiensis in TPI Bandengan (69%), M. tenuipes in TPI Bandengan (93%) , T. longipes in TPI Roban (80%), and P. indicus in TPI Bandengan (78%). Based on study of biological aspect, the size that is often caught each month is different, most positive allometric growth, Most of the shrimp caught immature gonads, Comparison of sex ratio shows that the number of female shrimp is more common than shrimp. 

scholarly journals ASPEK BIOLOGI IKAN TIGAWAJA (Johnius sp.) YANG DIDARATKAN DI PELABUHAN PERIKANAN PANTAI (PPP) TAWANG KABUPATEN KENDAL

2017 ◽  
Vol 5 (4) ◽  
pp. 461-467
Author(s):  
Syiva Nur Anggraeni ◽  
Anhar Solichin ◽  
Niniek Widyorini
Keyword(s):  
Demersal Fish ◽  
Maturity Index ◽  
Survey Method ◽  
North Coast ◽  
Female Fish ◽  
Gonad Maturity ◽  
Purposive Sampling ◽  
The North ◽  
Value Range ◽  
Biological Aspects

ABSTRAK Kabupaten Kendal merupakan salah satu daerah yang berada di pesisir utara Laut Jawa. TPI Tawang merupakan Tempat Pelelangan Ikan (TPI) terbesar di Kabupaten Kendal. Salah satu jenis ikan demersal yang tertangkap di TPI Tawang adalah ikan Tigawaja. Tujuan dari penelitian ini adalah untuk mengetahui aspek biologi Ikan Tigawaja yang didaratkan di TPI Tawang. Penelitian ini dilaksanakan pada bulan Juni 2016. Metode dalam penelitian ini adalah metode survey. Pengambilan sampel menggunakan metode purposive  sampling. Hasil penelitian yang dilakukan pada Ikan Ikan Tigawaja sebanyak 390 ekor. Ukuran panjang Ikan Tigawaja dengan kisaran 10,5 cm – 20,9 cm. Pertumbuhan bersifat allometrik negatif dengan nilai b sebesar 2,8559. Faktor kondisi yang diperoleh sebesar 0,94 yang tergolong dalam ikan pipih. ukuran pertama kali tertangkap (L50%) adalah 16,4 cm. Tingkat kematangan gonad Ikan Tigawaja jantan didominasi oleh TKG II, sedangkan Tingkat Kematangan gonad Ikan Tigawaja betina didominasi oleh TKG III. Indeks kematangan gonad terendah pada Ikan Tigawaja jantan 0,154% dan tertinggi 0,465%, sedangkan nilai IKG terendah pada Ikan Tigawaja betina 0,56% dan tertinggi 8,82%. Ikan Tigawaja jantan dan betina pertama kali matang gonad (Lm) berukuran masing-masing sebesar 18 cm  dan 17,5 cm, artinya Ikan Tigawaja betina lebih cepat matang dari Ikan Tigawaja jantan. Fekunditasnya berkisar antara 15.500 – 44.148 butir dan sebaran nilai diameter telur berkisar dari 0,05 mm – 0,45 mm. Kata Kunci ; Ikan Tigawaja (Johnius sp), Aspek biologi, Perairan Kendal. ABSTRACT Kendal is one area which is on the north coast of Java Sea. The biggest fish auction place in Kendal Regency is Tawang Fish Auction (TPI Tawang). One of kind of demersal fish that caught in TPI Tawang is Croackers Fish. Biological aspect is needed to manage the resources of Croackers Fish. The porpose of this study is to found out the biological aspects of Croackers Fish Landed in Tawang Fish Auction Market. The research did in Juny 2016. The method used in this research is survey method. The sampling was taken by using Purposive sampling. From the research on 390 fish. the length size of Croackers Fish range from 10,5 cm – 20,9 cm. The growth of served was negative allometric with value of b 2,8859. The condition factor of 0,94 are flat fish. size of the first captured fish (L50%) was 16,4 cm. The Gonad Maturity Level of male Croackers Fish was dominated by TKG II, while for female of Croackers was dominate by TKG III. The lowest Gonad Maturity Index  for male of Croackers Fish was 0,154% dan the hightest was 0,456, while foe female fish the lowest Gonad Maturity Index was 0,56% and the highest was 8,82%. For both  male and female fish, first mature gonad was obtained 18 cm and 17,5 cm, it means that the female of Croackers Fish was mature faster than the male. The fecundity ranged from 15.500-44.148 item and variance of diameter value range from 0,05 mm – 0,45 mm.  Key Word; Croackers (Johnius sp), Biological Aspects, Kendal Waters.  

scholarly journals Truss Morphometric and Meristic Characters of Male and Female Donkey Croaker (Pennahia anea (Bloch 1793)) Taken from Asemdoyong Auction Center Pemalang, Central Java

Jurnal Biota ◽  
1970 ◽  
Vol 7 (2) ◽  
pp. 118-128
Author(s):  
Adenia Arih Utarini ◽  
Suhestri Suryaningsih ◽  
Agus Nuryanto
Keyword(s):  
Random Sampling ◽  
Sampling Technique ◽  
Demersal Fish ◽  
Survey Method ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Male And Female ◽  
Parametric Test ◽  
Central Java ◽  
Males And Females

Pennahia anea is among of the demersal fish landed at Asemdoyong Fish Auction Centre, Pemalang. P. anea doesn't show sexual dimorphism, so that other characters are needed to differentiate male and female individuals, i.e. truss morphometric and meristic characters. Previous studies have shown that truss morphometric and meristic can differentiate between male and female individuals. This study aims to describe the morphometric and meristic truss characters and determine the truss morphometrically and meristic characters that distinguish between males and females of Pennahia anea. The research used a survey method with a purposive random sampling technique. Male and female individuals of P. anea were examined based on their meristic and truss morphometric characters. The data were analyzed statistically using Mann Whitney non-parametric test. The result proved that male and female were significantly different in seven out of the 31 truss distances. Male individuals had a larger size than female individuals in three truss distances. In contrast, the male had a smaller size than the female individuals in four out of seven truss distances that distinguish both sexualities. The soft fin radius of the ventral fin was significantly different between male and female of P. anea. It could be concluded that male and female individuals of Pennahia anea have different truss distances and meristic characters with seven truss distances and one meristic character are different

scholarly journals ASPEK BIOLOGI UDANG Metapenaeus conjunctus DI PERAIRAN PEMALANG, JAWA TENGAH Biological Aspects of Metapenaeus conjunctus Shrimp in the Pemalang Water, Central Java

2020 ◽  
Vol 8 (4) ◽  
pp. 357-363
Author(s):  
Ahmad Zhafran Siraj ◽  
Suradi Wijaya Saputra ◽  
Siti Rudiyanti
Keyword(s):  
Sex Ratio ◽  
Size Structure ◽  
Mesh Size ◽  
Survey Method ◽  
Maturity Level ◽  
The Sustainable Development ◽  
Central Java ◽  
Biological Aspects ◽  
Development Approach ◽  
Catch Composition

Penangkapan udang Metapenaeus conjunctus secara intensif serta tidak berpedoman kepada pendekatan pembangunan berkelanjutan dapat menyebabkan sumber daya M. conjunctus terkuras dan juga tingkat eksploitasinya menjadi tidak efisien. Tujuan dari penelitian ini yaitu pengkajian kepada aspek-aspek biologi udang M. conjunctus seperti: komposisi hasil tangkapan, struktur ukuran, nisbah kelamin, ukuran pertama kali udang tertangkap (L50%), sifat pertumbuhan, faktor kondisi, dan Tingkat Kematangan Gonad. Pelaksanaan penelitian dimulai dari bulan April sampai Juni 2017. Metode penelitian yang digunakan yaitu metode survey. Sampel udang M. conjunctus diambil 1 kali setiap bulan dari Tempat Pelelangan Ikan (TPI) Asemdoyong dan Tanjungsari di Kabupaten Pemalang, Jawa Tengah. Setiap bulan dilakukan satu kali pengambilan sampel. Sampel udang diambil dari total hasil tangkapan salah satu perahu pada setiap TPI. Jumlah sampel udang M. conjunctus yang diteliti yaitu 898 ekor.  Hasil penelitian menunjukkan modus panjang karapas udang bulan April 114-129 mm, bulan Mei 82-97 mm, bulan Juni 66-81 mm. Udang M. conjunctus jantan memiliki sifat pertumbuhan isometrik, dan pada udang betina allometrik positif. Nilai faktor kondisi udang jantan adalah 1, sedangkan udang betina 1,15 yang berarti udang betina lebih montok. Ukuran pertama kali tertangkap (L50%) udang jantan 95 dan 92 mm pada udang betina. Tingkat Kematangan Gonad udang pada bulan April didominasi TKG II 47% udang jantan dan 50% udang betina, bulan Mei didominasi TKG I 76%, bulan Juni didominasi TKG I sebesar 75%. Perbandingan nisbah kelamin udang M. conjunctus jantan dan betina yaitu 1:1,99. Konsep pengelolaan udang M. conjunctus di perairan Kabupaten Pemalang penggunaan alat tangkap selektif dengan mesh size yang sesuai, dan operasi penangkapan dilakukan jauh dari bibir pantai. Hal tersebut sesuai dengan prinsip pengelolaan perikanan berkelanjutan. The intensive catching of Metapenaeus conjunctus shrimp and not guided by the sustainable development approach can cause M. conjunctus resources to be drained and also the level of exploitation becomes inefficient. The purpose of this study is to study the biological aspects of M. conjunctus shrimp such as catch composition, size structure, sex ratio, size of the first time the shrimp was caught (L50%), growth characteristics, condition factors, and Gonad Maturity Level. The research was conducted from April to June 2017. The research method used was the survey method. M. conjunctus shrimp samples were taken once a month from Asemdoyong and Tanjungsari Fish Auction Sites in Pemalang District, Central Java. Every month sampling is done. Shrimp samples were taken from the total catch of one boat at each TPI. The number of samples of M. conjunctus shrimp studied was 898. The results showed the long mode of shrimp carapace in April 114-129 mm, in May 82-97 mm, in June 66-81 mm. Male M. conjunctus shrimp have isometric growth properties, and in allometric positive shrimp. The value of the condition factor of male shrimp is 1, while female shrimp is 1.15, which means female shrimp is plumper. The first size caught (L50%) was 95 and 92 mm male shrimp in female shrimp. Maturity Level of shrimp in April was dominated by TKG II 47% male shrimp and 50% female shrimp, in May dominated TKG I 76%, in June dominated TKG I by 75%. A comparison of male and female M. conjunctus shrimp sex ratio is 1: 1,99. The concept of management of M. conjunctus shrimp in Pemalang Regency waters uses selective fishing gear with an appropriate mesh size, and fishing operations are carried out far from the shoreline. This is by following the principles of sustainable fisheries management.

scholarly journals ANALISIS HASIL TANGKAPAN JARING ARAD DI PANGKALAN PENDARATAN IKAN (PPI) TAMBAK LOROK, SEMARANG (Catch Analysis Of Arad Net at The Fish Landing Base Tambak Lorok, Semarang)

2019 ◽  
Vol 14 (2) ◽  
pp. 100
Author(s):  
Eki Septiana ◽  
Suradi Wijaya Saputra ◽  
Abdul Ghofar
Keyword(s):  
Mesh Size ◽  
Fishing Effort ◽  
White Shrimp ◽  
Survey Method ◽  
Systematic Sampling ◽  
Target Species ◽  
Total Cost ◽  
Fishing Boat ◽  
Power Machine ◽  
Total Species

Jaring arad merupakan jaring penangkap udang sebagai hasil tangkapan utama dan memiliki hasil tangkapan sampingan. Tujuan penelitian ini untuk mengidentifikasi hasil tangkap utama dan hasil tangkap sampingan, mengetahui struktur ukuran tangkapan utama, spesifikasi perahu dan alat tangkap arad, serta menganalisis kelayakan usaha penangkapan. Metode yang digunakan adalah metode survei. Pengambilan sampel menggunakan sistematik sampling. Sampel udang diambil secara proporsional yaitu minimal 10% dari total hasil tangkapan. Hasil tangkap selama penelitian terdiri dari 7 spesies krustase, 3 spesies moluska, dan 10 spesies ikan. Ukuran pertama tertangkap (Lc50%)  udang krosok (M. lysianassa) adalah 9 mm, (Lc50%)  udang putih (P. merguiensis) 11 mm. Perahu arad di Tambak Lorok memiliki ukuran relatif sama yaitu 4-8 GT, kekuatan mesin 20-48 PK. Mesh size kantong 24,5 mm.  Hasil tangkapan jaring arad sebesar Rp 426.000,00  per trip, didapatkan dari keuntungan per kilo penjualan udang dan hasil tangkap sampingan. Sedangkan total biaya produksi sebesar Rp. 209.662,00, sehingga diperoleh untung per trip sebesar Rp. 216.337,00 dengan R/C ratio yaitu 2,03 yang mengartikan jaring arad layak diusahakan Arad net is one of fishing gears to catch shrimp as the target species and bycatch. The purposes of this research were to identify the target species and bycatch, to know structure of target species, specification of  fishing boat and arad net, and to analyze the profit and loss of fishing effort. The method used was survey method. This research used systematic sampling. Shrimp samples were taken propotionally at least 10% of the total catch. The results during this research consisted of 7 species of crustacea, 3 species of molluscs, and 10 species of fishes. The size (Lc50%) of Krosok shrimp (M. lysianassa) is 9 mm and the size (Lc50%) of white shrimp (P. merguiensis) is 11 mm. Arad boat at Tambak Lorok has relatively similar size with another (4 to 8 GT). Power machine ranging from 20 to 48 PK, 24,5 mm mesh size. The profit of total species per trip earned from shrimp and bycatch per kilograms is Rp 426.000,00. Meanwhile, the total cost of production was Rp. 209.662,00. Therefore, benefit per trip obtained Rp. 216.337,00 with R/C ratio 2.03 which means arad net is feasible to operating.

scholarly journals Analisis Distribusi Hasil Tangkapan Berdasarkan Aktivitas Pasar dan Pemasaran Pelabuhan Perikanan Jawa Tengah

2021 ◽  
Vol 3 (1) ◽  
pp. 28-35
Author(s):  
Andi Perdana Gumilang
Keyword(s):  
Research Method ◽  
Survey Method ◽  
North Coast ◽  
Distribution Maps ◽  
The Third ◽  
The North ◽  
Central Java ◽  
Regional Markets ◽  
Increasing Demand ◽  
Distribution Of Fish

The fishing port has a function as a place for marketing and distribution of fish. Along with the increasing demand for fishery commodities, it is necessary to study the distribution of catches for the realization of the capture fisheries business. This study aims to examine the marketing distribution of catches at fishing ports in Central Java based on market aspects and marketing actors. The research method is a survey method by observing and assessing factors related to the marketing distribution of the catch. The analysis was carried out in a comparative descriptive manner through the presentation of distribution maps and tables. The results showed that the distribution of catches on the north coast of Central Java based on market aspects includes local and regional markets. Distribution of catches based on marketing actors found three patterns. The first pattern of distribution is from fishermen to the Fish Auction Place (TPI) then the collectors/basket traders continue to wholesalers, retailers and consumers. The second pattern is almost the same as the first pattern, except that fish from collectors after being processed or preserved is then continued to retailers and then sold to consumers. The third pattern is the catch from fishermen directly to retailers and then to consumers.

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