scholarly journals Settlement of White-spotted Spinefoot, Siganus canaliculatus(Pisces: Siganidae), in the Coastal Waters off Okinawa Island, Japan.

1999 ◽  
Vol 65 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Kiyoaki Kanashiro ◽  
Fumihiko Motonaga ◽  
Motofumi Kimura
Keyword(s):  
Coastal Waters ◽  
Okinawa Island ◽  
Siganus Canaliculatus

Description of Gnathia maculosa and a new record of Gnathia trimaculata (Crustacea, Isopoda, Gnathiidae), ectoparasites of elasmobranchs from Okinawan coastal waters

Zootaxa ◽  
2009 ◽  
Vol 2114 (1) ◽  
pp. 50-60 ◽  
Author(s):  
YUZO OTA ◽  
EUICHI HIROSE
Keyword(s):  
Great Barrier Reef ◽  
Coastal Waters ◽  
New Record ◽  
Barrier Reef ◽  
Ryukyu Archipelago ◽  
Okinawa Island ◽  
Wide Range

Gnathia maculosa sp. nov. is described from males reared in a laboratory from larvae that were collected as ectoparasites on elasmobranchs, caught off Okinawa Island in the Ryukyu Archipelago, southwestern Japan. The species is most similar to G. trimaculata but it is distinguished from G. trimaculata by deeper and narrower dorsal sulcus, a narrower body, and the wider pylopod. Gnathia trimaculata, previously recorded from Great Barrier Reef, Australia, was also collected from elasmobranchs caught off Okinawa Island. The record of G. trimaculata from Okinawa indicates a wide range of the distribution of the gnathiids inhabiting elasmobranchs.

scholarly journals DINAMIKA HASIL TANGKAPAN BARONANG (Siganus sp.) PADA RUMPON HIDUP SECARA SPASIAL-TEMPORAL DI PESISIR ULOULO KABUPATEN LUWU

1970 ◽  
Vol 10 (1) ◽  
pp. 45-57
Author(s):  
. Suardi ◽  
Budy Wiryawan ◽  
Am Azbas Taurusman ◽  
Joko Santoso ◽  
Mochammad Riyanto
Keyword(s):  
Coastal Waters ◽  
Diversity Index ◽  
Species Abundance ◽  
River Estuary ◽  
Seagrass Habitat ◽  
Siganus Canaliculatus ◽  
Fish Samples ◽  
Fish Aggregation ◽  
West Monsoon ◽  
Eucheuma Cottonii

ABSTRACTBiological-Fish Aggregation Devices (Bio FADs) is FADs which designed used seaweed as an attractor.  Bio FADs in this study were made using two species of seaweed i.e Eucheuma cottonii, called cottonii FADs (FC) and Gracilaria sp. called gracilaria FADs (FG).  The purpose of this study was to analyze the dynamics of Siganus sp catch around Bio FADs based on species, abundance, and ecological characteristics spatially and temporally. The research was conducted in Uloulo coastal waters of Luwu district from October 2014 to August 2015.  Fish samples were collected by using scoop net on both types of FADs which were installed in three different habitats as observation stations. The Shannon-Wienner (H') diversity index is relatively moderate in spatially and temporally. ANOSIM  shows that the abundance of fish catches between habitats is significantly different (R = 0,268; p = 0,001).  River estuary habitat has the highest abundance of catches which is about 14.77 ind/m2.  Furthermore, the abundance of catches between monsoon was significantly different (R = 0,110; p = 0,001).  The highest abundance of fish catches in the west monsoon (WM) is about  20,67 ind/m2. SIMPER analysis shows that Siganus canaliculatus is the main species based on habitat and season. The contribution of Siganus canaliculatus is quite high in seagrass habitat which is about 96.38%. Keywords: Bio-FADs, dynamics of catch, Siganus sp.ABSTRAKRumpon hidup atau Biological-Fish Aggregation Devices adalah rumpon yang didesain menggunakan rumput laut  sebagai atraktor. Rumpon hidup pada penelitian ini  dibuat dengan menggunakan rumput laut jenis  Eucheuma cottonii sehingga disebut rumpon cottonii(RC) dan Gracillaria sp  atau rumpon gracillaria (RG). Tujuan penelitian ini adalah menganalisis dinamika hasil tangkapan ikan baronang (Siganus sp.) di sekitar rumpon hidup berdasarkan jenis, kelimpahan, dan karakteristik ekologis secara   spasial  dan temporal.  Penelitian  ini dilaksanakan di perairan pesisir Uloulo Kabupaten Luwu dari bulan Oktober 2014  sampai  Agustus 2015. Sampel ikan  dikumpulkan dengan menggunakan serok  pada kedua jenis rumpon   yang dipasang di tiga habitat yang berbeda sebagai stasiun  pengamatan.  Indeks diversitas Shannon-Wienner (H') secara  spasial dan temporal relatif moderat.  Hasil ANOSIM  menunjukkan  bahwa  kelimpahan hasil tangkapan ikan antar habitat berbeda  sangat nyata,   (R = 0,268; p = 0,001).  Habitat muara sungai memiliki kelimpahan hasil tangkapan tertinggi yaitu 14,77 ind/m2. Selanjutnya kelimpahan hasil tangkapan  berdasarkan musim berbeda  nyata (R = 0,110; p = 0,001).  Kelimpahan hasil tangkapan ikan  tertinggi  pada musim barat (MB) yaitu 20,67 ind/m2 .Analisis SIMPER  menunjukkan  bahwa Siganus canaliculatus sebagai spesies utama   berdasarkan habitat dan musim. Kontsribusi Siganus canaliculatus  cukup tinggi  pada habitat padang lamun yaitu  sebesar  96,34% .Kata kunci:  rumpon hidup, dinamika hasil tangkapan, Siganus sp.

Gnathia nubila n. sp. and a new record of Gnathia grandilaris (Crustacea, Isopoda, Gnathiidae) that parasitizes elasmobranchs from Okinawan coastal waters, Japan

Zootaxa ◽  
2009 ◽  
Vol 2238 (1) ◽  
pp. 43-55 ◽  
Author(s):  
YUZO OTA ◽  
EUICHI HIROSE
Keyword(s):  
Great Barrier Reef ◽  
Coastal Waters ◽  
New Record ◽  
Barrier Reef ◽  
Ryukyu Archipelago ◽  
Female Adult ◽  
Okinawa Island ◽  
Male And Female

Gnathiid larvae were collected as ectoparasites on elasmobranchs caught in fisheries off Okinawa Island, Ryukyu Archipelago, southwestern Japan. The larvae were reared in a laboratory aquarium; some metamorphosed into male and female adults of Gnathia nubila n. sp. and Gnathia grandilaris Coetzee, Smit, Grutter & Davies, 2008. Males of G. nubila n. sp. were easily distinguished from all other species by the bifit and dentate mediofrontal process of the frontal border and by a narrow pleotelson. Gnathia grandilaris was originally recorded from the Great Barrier Reef (GBR), Australia, and here we report a second find of this species from the Ryukyus. Since the first description did not include female adult of G. grandilaris, we provide the morphology of female.

scholarly journals Komposisi hasil tangkapan soma darape di perairan pantai Desa Bajo Kecamatan Tatapaan Kabupaten Minahasa Selatan

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Jersey R. Cumentas ◽  
Lefrand Manoppo ◽  
Johnny Budiman
Keyword(s):  
Coastal Waters ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Scatophagus Argus ◽  
Predominant Species ◽  
Fish Resources ◽  
Siganus Canaliculatus ◽  
Gill Net ◽  
Catch Composition ◽  
Descriptive Method

ABSTRACT Soma darape is a traditional net fishing gear that still operated in Amurang Bay because of simple in construction, relatively inexpensive, and easy to operate using a small boat. The operation, however, sometimes is done in damaging ways to fish resources and the environment. Therefore, this research aims to study the species and composition of catches of soma darape, as well as assessing the legal size of catches. This research was done in coastal waters near mangrove of Bajo Village, Tatapaan District, South Minahasa Regency in June 2015; based on descriptive method. The catch consisted of 19 species, and the predominant species (≥ 20) were Scatophagus argus (42), Tylosurus crocodiles (33), Carangoides ferdau (27), Scylla serrata (26), Leiognathus smithursti (21) and Terapon jarbua (20). There were 6 species that have a legal size, namely Terapon jarbua (1), Scatophagus argus (18), Siganus canaliculatus (3), Lutjanus fulvus (5), Sillago analysts (16) and Scylla serrata (1). Of the total catch, only 17.89% was legal size and 82.11% was not legal size. Keywords: soma darape, gill net, catch composition, Amurang Bay   ABSTRAK Soma darape merupakan alat tangkap jaring tradisional yang masih dioperasikan di Teluk Amurang karena konstruksinya sederhana, relatif murah dan mudah dioperasikan dengan perahu ukuran kecil. Tetapi kadang-kadang pengoperasiannya dilakukan dengan cara-cara yang bersifat merusak sumberdaya ikan dan lingkungan. Oleh karena itu penelitian ini dilakukan untuk mempelajari jenis dan komposisi hasil tangkapan soma darape; serta menilai ukuran legal hasil tangkapan. Penelitian ini dilakukan di perairan pantai dekat mangrove Desa Bajo, Kecamatan Tatapaan Kabupaten Minahasa Selatan pada bulan Juni 2015; yang didasarkan pada metode deskriptif. Hasil tangkapan terdiri dari 19 spesies, dan spesies yang dominan (≥ 20 ekor) secara berturut-turut adalah ikan Scatophagus argus (42 ekor), Tylosurus crocodiles (33 ekor), Carangoides ferdau (27 ekor), Scylla serrata (26 ekor), Leiognathus smithursti (21 ekor) dan Terapon jarbua (20 ekor). Hanya 6 spesies yang memiliki ukuran legal tangkap, yaitu Terapon Jarbua (1 ekor), Scatophagus argus (18 ekor), Siganus canaliculatus (3 ekor), Lutjanus fulvus (5 ekor), Sillago analis (16 ekor) dan Scylla serrata (1 ekor). Secara total hasil tangkapan, hanya 17,89% yang layak tangkap dan 82,11% tidak layak tangkap. Kata-kata kunci: soma darape, jaring insang, komposisi tangkapan, Teluk Amurang

scholarly journals Some Reproductive Biology Studies of Rabbitfish Siganus canaliculatus (Park, 1797) from the Southern Coastal Waters of Jeneponto, South Sulawesi, Indonesia

2019 ◽  
Vol 16 (3) ◽  
pp. 617-624
Author(s):  
Suwarni Suwarni ◽  
Joeharnani Tresnati ◽  
Sharifuddin Bin Andy Omar ◽  
Ambo Tuwo
Keyword(s):  
Coastal Waters ◽  
Stage Iv ◽  
Fish Population ◽  
Management Policy ◽  
Biological Study ◽  
Fish Length ◽  
Siganus Canaliculatus ◽  
South Sulawesi ◽  
Egg Diameter ◽  
Rabbitfish Siganus Canaliculatus

The rabbitfish Siganus canaliculatus population has been exploited intensively in the Jeneponto Regency South Sulawesi by fishermen used non selective fishing gear, throughout the year even the spawning season. The intensive fishing without management policy can caused decreasing of the rabbit fish population, and if it continues population will be collapse. This study was conducted to investigate some of the reproductive biological study of this species. A total of 1821 specimens of S. canaliculatus consisting of 1436 males and 385 females were randomly collected on a monthly from fishers in the coastal waters of the Jeneponto, South Sulawesi. The fecundity and gonad stage were studied for 39 female individuals varied between 85 and 284 mm total length (TL). Egg diameters were determined using the microscope. The overall sex ratio (Males: Females) ranged from 1.7: 1 to 8.2:1 The estimation of fecundity was between 5416 and 130760 eggs.ind-1, and increased with fish length, body weight and gonad weight. Egg diameter of S. canaliculatus in this study ranged from 0.1-0.5 of stage III. 0.35-0.45 of stage IV, 0.1-0.55 of stage V, and 0.35-0.55 of stage VI. Egg diameters increased with increased fish length. Egg diameters increased with increased fish length.

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