Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus

Salinity intrusion in coastal areas due to climate change is alarming. In this study, the effects of salinity on embryonic and larval development of striped catfish (Pangasianodon hypophthalmus) were studied experimentally. Embryos and larvae were exposed to seven salinity treatments (0, 2, 4, 6, 8,...

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Autores principales:	Farzana Hossain, S. M. Majharul Islam, Mohammad Ashaf-Ud-Doulah, Md Shaha Ali, Md Sadiqul Islam, Christopher Brown, Md Shahjahan
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	aquaculture brackish water early development oxygen consumption pangas Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/67294455a149401d91b5ab8c9e8be618
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spelling	oai:doaj.org-article:67294455a149401d91b5ab8c9e8be6182021-12-01T18:29:30ZInfluences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus2296-774510.3389/fmars.2021.781951https://doaj.org/article/67294455a149401d91b5ab8c9e8be6182021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.781951/fullhttps://doaj.org/toc/2296-7745Salinity intrusion in coastal areas due to climate change is alarming. In this study, the effects of salinity on embryonic and larval development of striped catfish (Pangasianodon hypophthalmus) were studied experimentally. Embryos and larvae were exposed to seven salinity treatments (0, 2, 4, 6, 8, 10, and 12 ppt), each with three replications. Considerable survivability of embryos was recorded up to 6 ppt salinity. Mortality of embryos significantly increased at 8 and 10 ppt salinity, and 100% mortality was displayed within 12 h of exposure at 12 ppt salinity. The rate of hatching was significantly reduced at 8 and 10 ppt salinity. The 24 h lethal concentration (LC50) value of salinity for embryo was 11.24 ppt. Different types of deformities, such as undeveloped yolk sac, elongated gastrula yolk sac, and yolk sac bud, were highest at 10 ppt salinity. Similar to the embryo, considerable survivability of larvae was recorded up to 6 ppt salinity, and 100% mortalities were found within 24 h of exposure at 12 ppt salinity. The 24 and 48 h LC50 values of salinity for larvae were 10.63 and 8.48 ppt, respectively. Several types of deformities, including yolk sac ulceration, spine scoliosis, tail bent, yolk sac edema, and compromised swim bladder inflation, were highest at 10 ppt salinity after 48 h of exposure. Within 24 h of exposure, about 80% yolk sac of the larvae was absorbed at 8 and 10 ppt salinity, while 30%–50% yolk sac was absorbed at 0–6 ppt salinity. Growth rates in terms of length and weight were higher at 0, 2, and 4 ppt salinity and moderate at 6 and 8 ppt salinity. Overall, the current findings define the limits to optimize hatchery procedures for the culture of this species in low saline brackish water.Farzana HossainS. M. Majharul IslamMohammad Ashaf-Ud-DoulahMd Shaha AliMd Sadiqul IslamChristopher BrownMd ShahjahanFrontiers Media S.A.articleaquaculturebrackish waterearly developmentoxygen consumptionpangasScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aquaculture brackish water early development oxygen consumption pangas Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	aquaculture brackish water early development oxygen consumption pangas Science Q General. Including nature conservation, geographical distribution QH1-199.5 Farzana Hossain S. M. Majharul Islam Mohammad Ashaf-Ud-Doulah Md Shaha Ali Md Sadiqul Islam Christopher Brown Md Shahjahan Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
description	Salinity intrusion in coastal areas due to climate change is alarming. In this study, the effects of salinity on embryonic and larval development of striped catfish (Pangasianodon hypophthalmus) were studied experimentally. Embryos and larvae were exposed to seven salinity treatments (0, 2, 4, 6, 8, 10, and 12 ppt), each with three replications. Considerable survivability of embryos was recorded up to 6 ppt salinity. Mortality of embryos significantly increased at 8 and 10 ppt salinity, and 100% mortality was displayed within 12 h of exposure at 12 ppt salinity. The rate of hatching was significantly reduced at 8 and 10 ppt salinity. The 24 h lethal concentration (LC50) value of salinity for embryo was 11.24 ppt. Different types of deformities, such as undeveloped yolk sac, elongated gastrula yolk sac, and yolk sac bud, were highest at 10 ppt salinity. Similar to the embryo, considerable survivability of larvae was recorded up to 6 ppt salinity, and 100% mortalities were found within 24 h of exposure at 12 ppt salinity. The 24 and 48 h LC50 values of salinity for larvae were 10.63 and 8.48 ppt, respectively. Several types of deformities, including yolk sac ulceration, spine scoliosis, tail bent, yolk sac edema, and compromised swim bladder inflation, were highest at 10 ppt salinity after 48 h of exposure. Within 24 h of exposure, about 80% yolk sac of the larvae was absorbed at 8 and 10 ppt salinity, while 30%–50% yolk sac was absorbed at 0–6 ppt salinity. Growth rates in terms of length and weight were higher at 0, 2, and 4 ppt salinity and moderate at 6 and 8 ppt salinity. Overall, the current findings define the limits to optimize hatchery procedures for the culture of this species in low saline brackish water.
format	article
author	Farzana Hossain S. M. Majharul Islam Mohammad Ashaf-Ud-Doulah Md Shaha Ali Md Sadiqul Islam Christopher Brown Md Shahjahan
author_facet	Farzana Hossain S. M. Majharul Islam Mohammad Ashaf-Ud-Doulah Md Shaha Ali Md Sadiqul Islam Christopher Brown Md Shahjahan
author_sort	Farzana Hossain
title	Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
title_short	Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
title_full	Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
title_fullStr	Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
title_full_unstemmed	Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus
title_sort	influences of salinity on embryonic and larval development of striped catfish pangasianodon hypophthalmus
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/67294455a149401d91b5ab8c9e8be618
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Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus

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