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Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii

Sultan fish, Leptobarbus hoevenii is an important species for aquaculture in several Southeast Asian countries, including Thailand and Malaysia. However, knowledge on its yolk absorption, mouth size development, and first food ingestion timing is still lacking up-to-date. This information on the cor...

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Main Authors:	Sajeenuth Srithongthum, Hsein-Loong Au, Thumronk Amornsakun, Sarawuth Chesoh, Sitthisak Jantarat, Nobuo Suzuki, Yutaka Takeuchi, Anuar Hassan, Gunzo Kawamura, Lim, Leong Seng
Format:	Article
Language:	English English
Published:	2020
Subjects:	Q Science (General)
Online Access:	https://eprints.ums.edu.my/id/eprint/26277/1/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii.pdf https://eprints.ums.edu.my/id/eprint/26277/2/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii1.pdf https://eprints.ums.edu.my/id/eprint/26277/
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spelling	my.ums.eprints.262772020-11-10T05:47:30Z https://eprints.ums.edu.my/id/eprint/26277/ Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii Sajeenuth Srithongthum Hsein-Loong Au Thumronk Amornsakun Sarawuth Chesoh Sitthisak Jantarat Nobuo Suzuki Yutaka Takeuchi Anuar Hassan Gunzo Kawamura Lim, Leong Seng Q Science (General) Sultan fish, Leptobarbus hoevenii is an important species for aquaculture in several Southeast Asian countries, including Thailand and Malaysia. However, knowledge on its yolk absorption, mouth size development, and first food ingestion timing is still lacking up-to-date. This information on the correct feeding of the L. hoevenii larvae are crucial to farmers. The present study hence examined these parameters in the L. hoevenii. The newly hatched L. hoevenii larvae were obtained through natural spawning with the aid of chemicals injection, and sampled consecutively every 2 hours to measure their yolk volumes, mouth height, and to confirm the ingestion time of the first Moina into the larval gut. Also, a starvation experiment was conducted to detect the larval point-of-no-return (PNR). It was found that the yolk sac volume of the newly hatched L. hoevenii larvae was 77.51 µm, and it was completely absorbed at 108 hours after hatching (hAH). The larval mouth has first opened at 36 hAH (mouth height 215±22.59 µm) but the larvae only commenced first exogenous feeding on Moina (approximately 207 μm in width) at 62 hAH, when its mouth height reached 372.91±79.11 µm. The L. hoevenii larvae required about 18 hrs from 62–80 hAH, to adapt themselves to feed on the given Moina, and the PNR was estimated to happen at 70–72 hAH. It was recommended that Moina should be given to the L. hoevenii larvae best within 62–72 hAH, at the rearing water temperature of 27 to 29°C. 2020 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/26277/1/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii.pdf text en https://eprints.ums.edu.my/id/eprint/26277/2/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii1.pdf Sajeenuth Srithongthum and Hsein-Loong Au and Thumronk Amornsakun and Sarawuth Chesoh and Sitthisak Jantarat and Nobuo Suzuki and Yutaka Takeuchi and Anuar Hassan and Gunzo Kawamura and Lim, Leong Seng (2020) Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii. AACL Bioflux, 13 (3). pp. 1320-1327.
institution	Universiti Malaysia Sabah
building	UMS Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Sabah
content_source	UMS Institutional Repository
url_provider	http://eprints.ums.edu.my/
language	English English
topic	Q Science (General)
spellingShingle	Q Science (General) Sajeenuth Srithongthum Hsein-Loong Au Thumronk Amornsakun Sarawuth Chesoh Sitthisak Jantarat Nobuo Suzuki Yutaka Takeuchi Anuar Hassan Gunzo Kawamura Lim, Leong Seng Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
description	Sultan fish, Leptobarbus hoevenii is an important species for aquaculture in several Southeast Asian countries, including Thailand and Malaysia. However, knowledge on its yolk absorption, mouth size development, and first food ingestion timing is still lacking up-to-date. This information on the correct feeding of the L. hoevenii larvae are crucial to farmers. The present study hence examined these parameters in the L. hoevenii. The newly hatched L. hoevenii larvae were obtained through natural spawning with the aid of chemicals injection, and sampled consecutively every 2 hours to measure their yolk volumes, mouth height, and to confirm the ingestion time of the first Moina into the larval gut. Also, a starvation experiment was conducted to detect the larval point-of-no-return (PNR). It was found that the yolk sac volume of the newly hatched L. hoevenii larvae was 77.51 µm, and it was completely absorbed at 108 hours after hatching (hAH). The larval mouth has first opened at 36 hAH (mouth height 215±22.59 µm) but the larvae only commenced first exogenous feeding on Moina (approximately 207 μm in width) at 62 hAH, when its mouth height reached 372.91±79.11 µm. The L. hoevenii larvae required about 18 hrs from 62–80 hAH, to adapt themselves to feed on the given Moina, and the PNR was estimated to happen at 70–72 hAH. It was recommended that Moina should be given to the L. hoevenii larvae best within 62–72 hAH, at the rearing water temperature of 27 to 29°C.
format	Article
author	Sajeenuth Srithongthum Hsein-Loong Au Thumronk Amornsakun Sarawuth Chesoh Sitthisak Jantarat Nobuo Suzuki Yutaka Takeuchi Anuar Hassan Gunzo Kawamura Lim, Leong Seng
author_facet	Sajeenuth Srithongthum Hsein-Loong Au Thumronk Amornsakun Sarawuth Chesoh Sitthisak Jantarat Nobuo Suzuki Yutaka Takeuchi Anuar Hassan Gunzo Kawamura Lim, Leong Seng
author_sort	Sajeenuth Srithongthum
title	Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
title_short	Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
title_full	Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
title_fullStr	Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
title_full_unstemmed	Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
title_sort	yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii
publishDate	2020
url	https://eprints.ums.edu.my/id/eprint/26277/1/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii.pdf https://eprints.ums.edu.my/id/eprint/26277/2/Yolk-sac%20absorption%2C%20mouth%20size%20development%2C%20and%20first%20exogenous%20feeding%20of%20Sultan%20fish%2C%20Leptobarbus%20hoevenii1.pdf https://eprints.ums.edu.my/id/eprint/26277/
_version_	1760230478655258624
score	13.211869

Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii

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