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13457

Effect of Some Environmental Factors on the Food and Feeding Habits of the Cichlid Fish, Tilapia zillii, Inhabiting Lake Qarun, Egypt.

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Last updated: 22 Jan 2023

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Abstract

The present work aims to study the effect of the environmental factors (temperature, salinity and PH) on the food and feeding habits of Tilapia zilliicaughted from Lake Qarun. A total of 126 specimens of T. zillii were collected seasonally from the different localities of Lake Qarun, during the period from June, 2014 to July, 2015. Results showed that, the highest value of surface water temperature was recorded at Village 8 Station during summer (32.67±2.31 ºC) and the lowest (16.93±1.79 ºC) at Nema Island Station during winter. The maximum value of water salinity was recorded at Village 8 Station during summer (40.10±3.46 ‰) and autumn (40.47±2.73 ‰) and the minimum value (29.17±3.52 ‰) was observed at Kahk Village Station during winter. The highest values of hydrogen ion concentrations were recorded at Village 8 Station during summer (8.67±0.15) and autumn (8.76±0.02) and the lowest values were detected at Ezbet Abd El-Alim Station during spring (7.96±0.09) and winter (7.96±0.12). The maximum values of feeding activity were recorded during autumn and summer and the minimum activity was observed during spring. The feeding activity is relatively larger in the younger fish than in the older one; being 41.63% in the former and 25.60% in the latter. Results showed that, the fish is mainly omnivorous and consumed a wide range of animal and plant foods. The plant food includes plant tissue, algae and diatoms while, the major animal food includes molluscs, polychaets, insects, pisces, nematods, crustaceans, Protozoa, Foraminifera and Rotifera. The relative amount of plant food increases with the increasing length of the fish. However, the relative amount of animal food and sand granules decreases with the increasing length of this fish.

DOI

10.21608/eajbsz.2017.13457

Keywords

Tilapia zillii, Lake Qarun, Environmental factors, food and feeding habits

Authors

First Name

Sabry

Last Name

Shehata

MiddleName

M. A.

Affiliation

Marine Biology Branch, Zoology Department, Faculty of Science (boys), Al-Azhar University, Cairo, Egypt.

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First Name

Mohamed

Last Name

Ghanem

MiddleName

H. M.

Affiliation

Marine Biology Branch, Zoology Department, Faculty of Science (boys), Al-Azhar University, Cairo, Egypt.

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Orcid

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First Name

Amro

Last Name

Ragab

MiddleName

M. M.

Affiliation

Marine Biology Branch, Zoology Department, Faculty of Science (boys), Al-Azhar University, Cairo, Egypt.

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Volume

9

Article Issue

1

Related Issue

2590

Issue Date

2017-06-01

Receive Date

2018-09-12

Publish Date

2017-06-01

Page Start

55

Page End

70

Print ISSN

2090-0759

Online ISSN

2090-0821

Link

https://eajbsz.journals.ekb.eg/article_13457.html

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https://eajbsz.journals.ekb.eg/service?article_code=13457

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6

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Original Article

Type Code

672

Publication Type

Journal

Publication Title

Egyptian Academic Journal of Biological Sciences, B. Zoology

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https://eajbsz.journals.ekb.eg/

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Article

Created At

22 Jan 2023