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Practical and research recommendations for optimization of Beluga (Huso huso) larval rearing

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Year: 2014
COI code: ICII02_264
Paper Language: English

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Authors Practical and research recommendations for optimization of Beluga (Huso huso) larval rearing

  Reza Asgari - Department of Fisheries, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran- PDepartment of Fisheries, Faculty of Natural Resources, University of Tehran,Karaj, Iran
  Gholamreza Rafiee - Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
  Soheil Eagderi - Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
  Hadi Poorbagher - Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
  Naser Agh - Artemia and Aquatic Animals Research Institute, Urmia University
  Hamid Eshagh Zadeh - PDepartment of Fisheries, University of Hormozgan, Bandar abbas, Iran

Abstract:

Behavioral, skeletal, histological and enzymatic changes of beluga (Huso huso), withthe aim of optimizing the biotechnical rearing protocol and reducing mortality of thisspecies during larval rearing, were studied. Based on the results of these studies, thebest indicator for start feeding the beluga larvae is the end of benthic swimming andonset of schooling swimming, and use of other indicators such as melanin plugexpulsion or yolk sac exhaustion that have been used in several sturgeon species, arenot suitable for beluga. Also, in order to reduce mortality and expenses, with respectto development of all parts of digestive system as well as activity of all digestiveenzymes and also jaw teeth formation and calcium absorption prior to the start ofexogenous feeding, it is highly recommended that larvae do not require long-termuse of live food and weaning procedure should be start immediately after mixedfeeding period (12- 14 dph; 199.2- 253.5 ddph). Furthermore, to reduce the cost offood, according to high level of amylase activity from 28 dph (490 ddph) onwards,decrease of protein/carbohydrate ratio in the diet after this time is recommended.Also, regarding surveys of feeding apparatus skeletal system of beluga, with respectto IHY bone formation and dysfunction of jaw teeth as well as the emergence ofsuction ability in 28 dph (490 ddph), sinking food in addition to immersed food canalso be used from this day onwards. Furthermore, to reduce mortality andabnormality during endogenous feeding, the studies on optimizing the quality ofbrood stock diet and also physicochemical condition of water are recommended.

Keywords:

Beluga (Huso huso), Larvae, Digestive system, Feeding apparatus

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COI code: ICII02_264

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Asgari, Reza; Gholamreza Rafiee; Soheil Eagderi; Hadi Poorbagher; Naser Agh & Hamid Eshagh Zadeh, 2014, Practical and research recommendations for optimization of Beluga (Huso huso) larval rearing, The Second Iranian Conference of Ichthyology, كرج, دانشكده منابع طبيعي - دانشگاه تهران, https://www.civilica.com/Paper-ICII02-ICII02_264.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Asgari, Reza; Gholamreza Rafiee; Soheil Eagderi; Hadi Poorbagher; Naser Agh & Hamid Eshagh Zadeh, 2014)
Second and more: (Asgari; Rafiee; Eagderi; Poorbagher; Agh & Eshagh Zadeh, 2014)
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Paper No.: 55527
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