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All Journal Jurnal Lemuru : Jurnal Ilmu Perikanan dan Kelautan Indonesia Fisheries and Society
Nurqadri Syaia Bakti
Universitas Muhammadiyah Gorontalo
Agriculture, Biological Sciences & Forestry

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Species composition, density, gonad maturity stage and size of sea urchin at Wakatobi Archipelago, Southeast Sulawesi, Indonesia Nurqadri Syaia Bakti; La Nane
Fisheries and Society Volume 1 Issue 1, February 2021
Publisher : Fisheries and Society Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.419 KB) | DOI: 10.35635/fs.v1i1.2

Abstract

Sea urchin is echinoderm that body surface is covered with the spines. Sea urchin gonad has been consumed along time by the people at Wakatobi Archipelago. Sea urhin species is worried will be degraded. On the other hand, there is no study on species composition, density, size and maturity stage of sea urchins on Tolandono Island and Sawa Island, Wakatobi Regency. The purpose of this study was to determine the species composition, abundance, size and maturity level of sea urchin gonads. Sea urchin density was calculated with a 10 × 10 m transect quadrate. The data was analyzed by descriptive qualitatively. The results showed that in Tolandono Island and Sawa Island there were 4 types of sea urchins, namely Tripneustes gratila, Echinotrix calamaris, Diadema setosum and Echinoemetra sp. The size of urchin Tripneustes gratilla is ranging between 2.5 cm and 8.5 cm with the density 2 Ind./100 m2. Meanwhile, the gonad maturation stage (TKG) of Tripneustes gratila is at a 4.8 cm and spawned at a size 8–8.5 cm. TKG I is in the size range of 4.8–5 cm, TKG II is at 5.9–6.2 cm, TKG III is 6.4–6.6 cm, TKG IV is 6.8–7.5 cm and TKG IV is 6.8–7.5 cm. V in size 8.5 cm.
PREVALENSI VIRAL NERVOUS NECROSIS (VNN) PADA IKAN KERAPU EKOR BULAN (Variola sp.) DI PERAIRAN GORONTALO: Prevalence of Viral Nervous Necrosis (VNN) in Lunar-Tailed Grouper (Variola sp.) in Gorontalo Waters Ahmad Ainul Nurkhozin; Dewi Shinta Achmad; Nurqadri Syaia Bakti; Indri Afriani Yasin; Sitti Rosnany Alwi Natsir
JURNAL LEMURU Vol 4 No 3 (2022): JURNAL LEMURU: Jurnal Ilmu Perikanan dan Kelautan Indonesia
Publisher : Program Studi Teknologi Hasil Perikanan|Fakultas Pertanian|Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/lemuru.v4i3.2295

Abstract

Grouper (Family Serranidae) is one of the betanodavirus hosts. Betanodaviruses can infect species in tropical, subtropical or cold climates. This is a major concern because it has been reported to infect a variety of marine fish, both farmed and wild fish. The disease caused by this virus is commonly known as Viral Nervous Necrosis (VNN) or Viral Encephalopathy and Retinopathy (VER). This VNN disease is characterized by vacuolar necrosis of cells found in the brain, retina and spinal cord, can cause up to 100% mortality in larvae and juveniles and can cause significant losses in older fish. Infected fish, both wild and farmed, can act as reservoirs (nesting sites and breeding grounds for viruses) and can be a source of infection for farmed species. The method used in this study was descriptive method, while the Lunar-Tailed grouper (Variola sp.) samples used in this study were groupers caught measuring 26-42 cm. VNN testing on groupers by taking target organs (brains and eyes) then fixing them in 95% Ethanol then PCR testing at the Virology Laboratory. The results of this study indicate a different prevalence in the two waters in Gorontalo.
Co-Authors Ahmad Ainul Nurkhozin Dewi Shinta Achmad Indri Afriani Yasin La Nane Sitti Rosnany Alwi Natsir