Analysis in bycatch ratio of shrimp beam trawl in Yeosu coastal area

2017 ◽  
Vol 10 (1) ◽  
pp. 57-62
Author(s):  
Uihwan KWAK ◽  
Wonkeun JANG ◽  
Inwoo HAN ◽  
Kyounghoon LEE
Keyword(s):  
Coastal Area ◽  
Beam Trawl

scholarly journals ASPEK BIOLOGI, SEBARAN, DAN DAERAH ASUHAN UDANG Metapenaeus dobsoni (MIERS, 1878) DI PERAIRAN ACEH TIMUR

2018 ◽  
Vol 23 (3) ◽  
pp. 153 ◽  
Author(s):  
Dimas Angga Hedianto ◽  
Astri Suryandari ◽  
Didik Wahju Hendro Tjahjo
Keyword(s):  
Coastal Area ◽  
Carapace Length ◽  
River Mouth ◽  
Penaeid Shrimp ◽  
Nursery Ground ◽  
Beam Trawl ◽  
Low Salinity ◽  
Bottom Waters ◽  
Biological Aspects ◽  
First Maturity

Udang Metapenaeus dobsoni (Miers 1878) atau dikenal sebagai udang halus/kapur merupakan jenis udang penaeid yang dominan tertangkap di pesisir perairan Aceh Timur. Penelitian yang dilaksanakan pada April dan September tahun 2014-2015 serta April 2016 di perairan Aceh Timur bertujuan untuk mengkaji beberapa aspek biologi, kepadatan stok dan sebarannya, serta menduga daerah asuhan udang Metapenaeus dobsoni yang berguna sebagai bahan masukan untuk pengelolaannya. Aspek biologi udang yang dianalisis meliputi hubungan panjang-berat, kebiasaan makanan, dan ukuran pertama kali matang gonad (Lm50). Pengambilan sampel untuk mengetahui sebaran Metapenaeus dobsoni dilakukan menggunakan metode sapuan dengan alat tangkap mini beam trawl di 25 stasiun yang mewakili daerah estuaria, sungai, dan pesisir. Udang Metapenaeus dobsoni memiliki pola pertumbuhan alometrik negatif dengan tingkat trofik sebagai detritivora. Ukuran pertama kali matang gonad dicapai pada ukuran panjang karapas 1,3 cm. Udang Metapenaeus dobsoni tergolong udang kosmopolit dan euryhaline, sehingga menyebar secara luas di sepanjang perairan Aceh Timur. Kepadatan stok udang Metapenaeus dobsoni pada fase juvenil dan udang muda banyak ditemukan di daerah sungai yang ditumbuhi mangrove dengan salinitas di dasar perairan yang relatif rendah dan substrat dominan berupa lumpur (fraksi debu dan liat). Di daerah muara (kuala) dan pesisir dengan substrat dominan pasir dan salinitas cukup tinggi banyak ditemukan udang pada fase muda hingga dewasa. Daerah asuhan utama udang Metapenaeus dobsoni terdapat di Kuala Arakundo.Metapenaeus dobsoni (Miers 1878) shrimp, locally called “udang halus/kapur”, is a dominant penaeid shrimp caught in the coastal waters of East Aceh. The research was conducted in April and September of 2014-2015 and April 2016 in East Aceh waters aims to assess some biological aspects, distribution, stock density, and nursery ground of the shrimp management. Analysis on biological aspects include length-weight relationship, food habits, and carapace length at first maturity (Lm50). Sampling to determine distribution of the species was based on swept area method using mini beam trawl. Total 25 sampling sites selected representing estuary, river, and coastal area, respectively. Metapenaeus dobsoni has negative allometric growth pattern with trophic level as detritivore. Size at first maturity the carapace length of 1.3 cm. Stock density of Metapenaeus dobsoni in the juvenile and adolescent phase commonly found in mangroves-covered river area with relatively low salinity at the bottom waters and have mud as dominant substrate (fraction of silt and clay). The adolescent to adult phase found in the estuary (river mouth) and coastal area with sand as dominant substrate and high salinity waters. The main nursery grounds of Metapenaeus dobsoni found in Kuala Arakundo.

STRUKTUR DAN FISIOGNOMI VEGETASI MANGROVE DI REMPANG CATE KOTA BATAM

SIMBIOSA ◽  
2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Yarsi Efendi ◽  
Dahrul Aman Harahap
Keyword(s):  
Data Collection ◽  
Coastal Area ◽  
Growth Zone ◽  
Mangrove Area ◽  
Rhizophora Apiculata ◽  
The Difference ◽  
Mangrove Zonation ◽  
Vertical Transect ◽  
Zone Growth ◽  
Vegetation Physiognomy

Structure and physiognomy of mangrove strongly influenced by the zonation that occurred in the area of mangroves growth. The differences of zona growth will effect  to differences in the structure and composition of vegetation. There are three zones in the mangrove area, which is caused by the difference of flooding which also resulted in the difference to the salinity. The differences of growth zone will performed to the type vegetation performance (Physiognomy). This study is aims to prove the mangrove’s physiognomy that taken in the coastal area of Rempang Cate  Batam, on March 2014 to June 2014. This study was a survey with data collection using a vertical transect plots 100 m. Based on the research that has been done obtained difference vegetation physiognomy stands for every level of growth in each zone growth. Proximally found 13 species of mangroves in 8 families. The results of the analysis of the vegetation on the trees growth level are, Ceriops decandra have the greatest significance important value 167.55% on sapling (juvenille ) level is dominated by Rhizophora apiculata 120%, and seedling growth level dominated by Rhizophora apiculata  186.80%. Keywords: Structure and physiognomy, mangrove zonation

Survival of by-catch from a beam trawl

1995 ◽  
Vol 126 ◽  
pp. 31-38 ◽  
Author(s):  
MJ Kaiser ◽  
BE Spencer
Keyword(s):  
Beam Trawl ◽  
By Catch

Species composition and abundance of resources collcted by gill net, trap net, and long line in the coastal area of Oenarodo Go-heung, Korea

2019 ◽  
Vol 12 (1) ◽  
pp. 76-83
Author(s):  
Chae-Lin KIM ◽  
Jeong-A AN ◽  
Eun-Bi MIN ◽  
Eun-A YOON ◽  
Doo-Jin HWANG
Keyword(s):  
Species Composition ◽  
Coastal Area ◽  
Gill Net ◽  
Long Line

Characteristics of Upward Leaders of Winter Lightning in the Coastal Area of the Sea of Japan

2012 ◽  
Vol 132 (6) ◽  
pp. 560-567 ◽  
Author(s):  
Megumu Miki ◽  
Toru Miki ◽  
Akira Asakawa ◽  
Takatoshi Shindo ◽  
Shigeru Yokoyama
Keyword(s):  
Sea Of Japan ◽  
Coastal Area ◽  
The Sea Of Japan

Characteristics of Winter Lightning Threatening Wind Turbines in Coastal Area of the Sea of Japan

2011 ◽  
Vol 131 (12) ◽  
pp. 973-978 ◽  
Author(s):  
Fumiyuki Fujii ◽  
Masaru Ishii ◽  
Mikihisa Saito ◽  
Michihiro Matsui ◽  
Daisuke Natsuno
Keyword(s):  
Sea Of Japan ◽  
Wind Turbines ◽  
Coastal Area ◽  
The Sea Of Japan

A Comparative Study of Seismic and Tsunami Vulnerability of Structures Located in the Coastal Area of Rabat-Salé, Morocco

2020 ◽  
Vol 14 (4) ◽  
pp. 264
Author(s):  
E. Nchiti ◽  
A. El Hammoumi ◽  
Kamal Gueraoui ◽  
A. Iben Brahim
Keyword(s):  
Comparative Study ◽  
Coastal Area
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