Investigation of Summer Mortalities in the Farmed Nile Tilapia, Oreochromis Niloticus, from Three Provinces in Egypt

Abaza , Samar S.; Shahin , Khalid; Gaafar , Alkhateib; Younes , Abdelgayed; Soliman , Magdy

Article Details

Investigation of Summer Mortalities in the Farmed Nile Tilapia, Oreochromis Niloticus, from Three Provinces in Egypt

Authors:

Abaza , Samar S. | Shahin , Khalid | Gaafar , Alkhateib | Younes , Abdelgayed | Soliman , Magdy

Publisher:

Egyptian Society for the Development of Fisheries and Human Health

Main Topics:

Biology

Journal:

Egyptian Journal of Aquatic Biology and Fisheries 2024 Vol.28 Issue 1, pp.1957-1982

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

271210

Frequency:

Quarterly

pISSN:

11106131

Descriptors:

Keywords:

Abstract:

 The Nile tilapia represents one of the most widely cultured fish species in Egypt. In recent years, the Egyptian tilapia farms have been suffering from unknown high mortalities during the summer season resulting in high economic losses. Investigation of mortalities by different research groups revealed a significant association with various microbial agents, however, the main causes of summer mortality in tilapia are still unknown. The current study aimed to identify the possible causes of summer mortalities in tilapia farms from three main tilapia-producing governorates in Egypt. Clinical, microbial, histopathological and environmental examinations have been carried out over a period of a year in different tilapia farms and results were recorded. Clinical examination of moribund and recently dead fish showed extensive cutaneous haemorrhages with scales losses and erosion, abdominal distension, and ulcers. Screening of fish samples by viral and bacterial examination and molecular assays, including PCR and sequencing, showed negative results for tilapia lake virus and positive detection of Aeromonas hydrophila subsp. dhakensis, A. sobria, A. veronii, A. enteropelogenes, and Streptococcus iniae. The current study may contribute to our knowledge of potential causes of summer mortality in tilapia and would help in the development of control strategies for the devastating tilapia losses in the Egyptian fish farms.

Article Details

Investigation of Summer Mortalities in the Farmed Nile Tilapia, Oreochromis Niloticus, from Three Provinces in Egypt

Authors:

Abaza , Samar S. | Shahin , Khalid | Gaafar , Alkhateib | Younes , Abdelgayed | Soliman , Magdy

Publisher:

Egyptian Society for the Development of Fisheries and Human Health

Main Topics:

Biology

Journal:

Egyptian Journal of Aquatic Biology and Fisheries 2024 Vol.28 Issue 1, pp.1957-1982

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

271210

Frequency:

Quarterly

pISSN:

11106131

Descriptors:

TILAPIA

FRESHWATER FISHES

AEROMONAS

EGYPT

Nile tilapia

Summer mortalities

Aeromonas hydrophila

Streptococcus iniae

TiLV

Issues

Article Details

Authors: Abaza , Samar S. | Shahin , Khalid | Gaafar , Alkhateib | Younes , Abdelgayed | Soliman , Magdy

Publisher: Egyptian Society for the Development of Fisheries and Human Health

Main Topics: Biology

Journal: Egyptian Journal of Aquatic Biology and Fisheries 2024 Vol.28 Issue 1, pp.1957-1982

Document Type: Article

Publication Date: 2/2024

Document Language: English

Document ID (Org No.): 271210

Frequency: Quarterly

pISSN: 11106131

Descriptors:

Issues

Authors:

Abaza , Samar S. | Shahin , Khalid | Gaafar , Alkhateib | Younes , Abdelgayed | Soliman , Magdy

Publisher:

Egyptian Society for the Development of Fisheries and Human Health

Main Topics:

Biology

Journal:

Egyptian Journal of Aquatic Biology and Fisheries 2024 Vol.28 Issue 1, pp.1957-1982

Document Type:

Article

Publication Date:

2/2024

Document Language:

English

Document ID (Org No.):

271210

Frequency:

Quarterly

pISSN:

11106131