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Effects of Sodium Nifurstyrenate Bath and Freezing of Live Diets on the Growth, Survival, and Bacterial Intestinal Flora of Black Seabream (Acanthopagrus schlegeli) Larvae
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yamanoi, Hideo Kayano, Yasuhisa Oda, Tadashi |
| Copyright Year | 1990 |
| Abstract | The effects of sodium nifurstyrenate (NS) bath and freezing of rotifers (Brachionus plicatilis) and brine shrimp (Artemia salina) on the growth, survival rate, and the aerobic bacterial intestinal flora of black seabream larvae were investigated at a fish farming station. Bacterial counts (ZoBell's 2216e) of black seabream larvae (Pond I) fed with medicated live diets and artificial diet were 1.7×102 and 3.9×103CFU/fish in 10 and 15-day-old fish, respectively. Those of the fish (Pond II) fed with frozen rotifers and brine shrimp nauplii were 2.2×102and 1.9×103CFU/fish at each stages. In the case of the fish (Pond III) given live diets without NS treatment and artificial diet, bacterial counts were 3.6×102 and 2.4×103CFU/fish in 10 and 15-day-old fish , respectively. The differences in bacterial count among them were small at these stages. But in 42day-old, bacterial counts of larvae of Pond I, II, and III reached 1.3×103, 5.3×102 , and 3.6× 106CFU fish , respectively. Although Vibrio (38.9~72.7%) and Pseudomonas (20.7~52.4%) constituted dominant bacteria in either fish groups, the conspicuous changes of the most dominant bacteria were observed in the fish of Pond III. The average total length of the fish (46-day-old) at the end of the experiment were 16.5, 14.0, and 17.6mm in Pond I, II, and III, respectively. And survival rates were 40.6, 73,1, and 25.9%, respectively. There were no differences in the suffocation tolerance (handling test) among them. From these results, frozen rotifers and brine shrimp nauplii seem to be superior as diets for black seabream larvae. 魚介類 の種苗生産過程 にお いて餌料 と して投与 され るシオ ミズ ツボ ワム シBrachionus plicatilis(以 下 ワムシと記す)や ブライ ン シュ リンプArtemia salina(以 下BSと 記す)幼 生 が,極 めて多 くの細 菌によ って汚染 されてお り,そ のたあに これ ら餌料生 物 が 病 原 菌 の 運 搬 者 と な って 飼 育 中 の 魚 介 類 仔 稚 魚 に 悪 影 響 を 及 ぼす 可 能 性 が あ る こ と は,林 ら1)に よ って 既 に指 摘 され て い た。 実 際,マ ダイPagrus major 仔 魚 に お いてVibrio alginolyticus感 染 症 が,ま た アユPlecoglossus altivelis仔 魚 に お い て はV. 受 領 日:1989(H元)年9月16日 索 引 語:ク ロダイ/消 化管内細菌叢/餌 料生物の薬浴/冷 凍餌料 連 絡 先:〒708岡 山県津 山市二宮1878-1岡 山県水産試験場魚病指導 セ ンター 山野井英夫 Address:H. YAMANOI, Okayama Pref. Fish. Exp. St. Fish. Disease Center , Ninomiya, Tsuyama 708,Japan |
| Starting Page | 13 |
| Ending Page | 22 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.11233/aquaculturesci1953.38.13 |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/aquaculturesci1953/38/1/38_1_13/_pdf/-char/ja |
| Alternate Webpage(s) | https://doi.org/10.11233/aquaculturesci1953.38.13 |
| Volume Number | 38 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
