scholarly journals Effect of the combination of a cold water temperature and exogenous estrogens on feminization, growth, gonadosomatic index and fat muscle content of Nile tilapia Oreochromis niloticus (Linnaeus, 1758)

2019 ◽  
Vol 47 (1) ◽  
pp. 52-64
Author(s):  
Angol Lazaro Velasco ◽  
Helsi Isidro Cristobal ◽  
Juan Alcantar Vazquez ◽  
Carolina Antonio Estrada ◽  
Daniel Calzada Ruiz ◽  
...  
Keyword(s):  
Water Temperature ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Cold Water ◽  
Gonadosomatic Index ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Cold Water Temperature

scholarly journals Investigation of parasite and diseases at cage culture Nile tilapia (Oreochromis niloticus) in Southern region of Bangladesh

2020 ◽  
Vol 6 (3) ◽  
pp. 431-437
Author(s):  
Mohammad Ashaf Ud Doulah ◽  
SM Majharul Islam ◽  
Mohammad Shadiqur Rahman ◽  
Md Shariful Islam ◽  
Mohammad Harun Or Rashid ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Cage Culture ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Eleven Species

The study was carried out to identify the parasite and causative diseases on cage reared tilapia at Bakerganj upazila, Barisal district. The infected tilapia fishes were collected from the cages and brought to the laboratory to find out signs, symptoms and infection area on the fish body. Physico-chemical parameters of water, such as water temperature, pH, dissolved oxygen, nitrate, phosphate and ammonia were monitored fortnightly. The values of water temperature (°C), pH, dissolved oxygen (mg/l), nitrate (mg/l), phosphate (mg/l) and ammonia (mg/l) were 32.4±2.1, 6.2±0.3, 7.52±0.4, 0.028±.008, 11.30±2.26 and 0.09±0.02, respectively but the concentration of nitrate was so higher during the study time. Eleven species of parasites namely, Chilodonella sp, Trichodiniasp., Gyrodactylussp.,Cichlidogyrus sp., Capillariasp, Orientocreadium sp, Eustrongylidae sp, Allocreadium sp, Euclinostomum sp, Tylodelphys sp. and Metagonimus spwere were identified. Parasites were found on all the examined parts of the fish body but gill showed the most infested area of the host. Highest mortality rate was occurred in the month of October and lowest mortality rate was in July. In this circumstance, proper management system and handling are best ways to prevent diseases and reduce the mortality rate of tilapia on cage farming in the southern area. Res. Agric., Livest. Fish.6(3): 431-437, December 2019

scholarly journals Effect of water temperature on energy budget of Nile tilapia, Oreochromis niloticus

2010 ◽  
Vol 17 (3) ◽  
pp. e683-e690 ◽  
Author(s):  
S. XIE ◽  
K. ZHENG ◽  
J. CHEN ◽  
Z. ZHANG ◽  
X. ZHU ◽  
...  
Keyword(s):  
Water Temperature ◽  
Energy Budget ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Effect Of Water ◽  
Nile Tilapia Oreochromis Niloticus

Effect of ambient oxygen on growth and reproduction in Nile tilapia (Oreochromis niloticus)

2008 ◽  
Vol 65 (7) ◽  
pp. 1413-1424 ◽  
Author(s):  
Jeppe Kolding ◽  
Lise Haug ◽  
Sigurd Stefansson
Keyword(s):  
Oxygen Concentration ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Gonadosomatic Index ◽  
Size At Maturity ◽  
Low Oxygen ◽  
Asymptotic Size ◽  
Ambient Oxygen ◽  
Nile Tilapia Oreochromis Niloticus ◽  
First Maturity

Growth, size at maturity, gonadosomatic index (GSI), egg size, and absolute fecundity of Nile tilapia ( Oreochromis niloticus ) were significantly affected by oxygen levels (1.5 ± 1.0, 2.8 ± 1.4, and 6.0 ± 1.8 mg·L–1) in a controlled experiment designed to test the hypothesis (D. Pauly. 1984. J. Cons. Int. Explor. Mer, 41: 280–284) that O2 is the controlling factor for the transition from juvenile to adult in fish, in general, in the context of phenotypic life history plasticity and “stunting” in tilapias. Size at maturity and the estimated asymptotic size decreased with decreasing O2 concentration, as predicted by Pauly’s hypothesis. All fish matured at the same age (18 weeks old), which is in contrast to conventional definitions of stunting. This finding challenges the suggested plasticity in age at first maturity for tilapia. The results also challenge the hypothesis that stunting is a unique recruitment mechanism, as the smaller fish in the group with low oxygen concentration produced smaller and fewer eggs than the larger fish in the group with high oxygen concentration.

Biochemical and physiological responses of Nile tilapia (Oreochromis niloticus Linn.) subjected to rapid increases of water temperature

2018 ◽  
Vol 28 (2) ◽  
pp. 493-499
Author(s):  
Paiboon Panase ◽  
Supap Saenphet ◽  
Kanokporn Saenphet ◽  
Paramet Pathike ◽  
Rujiraporn Thainum
Keyword(s):  
Water Temperature ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Physiological Responses ◽  
Nile Tilapia Oreochromis Niloticus
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