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309358

INVESTIGATION OF THE EFFECT OF WATER QUALITY ON SEED PRODUCTION IN TWO TILAPIA HATCHERIES IN EGYPT

Article

Last updated: 29 Dec 2024

Subjects

-

Tags

Aquatic animal diseases and aquaculture management.

Abstract

A field study was conducted in two tilapia hatcheries, hatchery (A) located at El Fayoum Governorate and hatchery (B) located in Sharkeya Governorate, to investigate the effect of water quality on seed production. Eighty-four water samples were collected from the inlet, outlet, broodstock ponds, egg funnels and nursery ponds for determination of physico-chemical condition and microbial count of water used for incubating eggs and nursing frys. Fry and eggs samples were also examined for microbial loads. Results indicated that there was no significant difference between both hatcheries with respect to microbial of water samples, fry and eggs, although they were slightly higher in hatchery (B) than hatchery (A). Temperature (Temp.) and pH were not significantly different among water samples from both hatcheries.
Dissolved oxygen (DO) and nitrite were significantly different for water samples used for incubating eggs between both hatcheries with means of (5.11 ± 0.305), (5.08 ± .44) mg/dl, respectively and (0.06 ± 0.03), (0.09 ± 0.06) mg/dl, respectively. DO and nitrite were also significantly different between both hatcheries for water used for rearing fry with means of (4.84 ± 0.24), (5.11 ± 0.47) mg/dl, respectively and (0.08 ± 0.05) and (0.11 ± 0.10) mg/dl, respectively. Ammonia showed significant different between both hatcheries for water samples used for incubating eggs with means of (0.23 ± 0.09) and (0.72 ± 0.35) mg/dl, respectively, on the other hand ammonia in water samples used for rearing fry were not
significantly different between both hatcheries. The low level of difference in both microbiological and physical-chemical parameters between the two hatcheries leads to similar fertility percentage (95% and 96% for hatchery (B) and hatchery (A), respectively), hatchability percentage (90% and 91% for the hatchery (B) and hatchery (A), respectively) and mortality percentage (10% and 9% for hatchery (B) and hatchery (A), respectively). The better performance of hatchery (A) may be due to better sanitary measurements adopted.:

Keywords

Hatcheries, fry and eggs, water quality, microbial counts

Volume

77

Article Issue

4

Related Issue

42582

Issue Date

2017-12-01

Receive Date

2023-07-23

Publish Date

2017-12-01

Page Start

741

Page End

749

Print ISSN

1110-1288

Link

https://jevma.journals.ekb.eg/article_309358.html

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https://jevma.journals.ekb.eg/service?article_code=309358

Order

309,358

Type

Original Research Articles

Type Code

2,724

Publication Type

Journal

Publication Title

Journal of the Egyptian Veterinary Medical Association

Publication Link

https://jevma.journals.ekb.eg/

MainTitle

INVESTIGATION OF THE EFFECT OF WATER QUALITY ON SEED PRODUCTION IN TWO TILAPIA HATCHERIES IN EGYPT

Details

Type

Article

Created At

18 Dec 2024