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94125

Some Fisheries and Biological Aspects of the Crayfish Procambarus clarkii (Girard, 1852) in the River Nile, Egypt

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Last updated: 23 Dec 2024

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Abstract

Procambarus clarkii, as an invasive species, has proved to have an adverse impact on the Egyptian freshwater system, nevertheless, its fisheries could be one of many ecosystem services it can provide to society. This study aims to document the main fisheries characteristics of this species during 2014. Many fishing methods were found to capture P. clarkii including trammel nets (Estaquaza and extended nets), gill nets, and traps. About 70% of the individuals had carapace lengths between 39 and 52 mm and 95 % the individuals had a mean carapace length that exceeds the harvestable limit (35 mm). The length-weight relationship data of P. clarkii showed an allometric growth for weight more than for length (b > 3). The variations in male and female sex ratio with length classes showed that males of P. clarkii predominated all length classes except length classes 8 and 12 cm total length. The results of this study indicate that the crayfish grows considerably longer in the River Nile than it usually does in its original environment and that there is an assisted population, and high yields are expected when crayfish from the River Nile are to be utilized for commercial purposes.

DOI

10.21608/ejabf.2020.94125

Keywords

Procambarus clarkia Crayfish Harvestable size, allometric growth, sex ratio, population structure

Authors

First Name

Walid

Last Name

Aly

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-

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Email

walid_taher@hotmail.com

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Orcid

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First Name

Alaa

Last Name

El-Far

MiddleName

-

Affiliation

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Email

alaa.melfar@yahoo.com

City

-

Orcid

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First Name

Mohamed

Last Name

A. Fetouh

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-

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-

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Volume

24

Article Issue

4

Related Issue

14113

Issue Date

2020-07-01

Receive Date

2020-05-19

Publish Date

2020-07-01

Page Start

33

Page End

42

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_94125.html

Detail API

https://ejabf.journals.ekb.eg/service?article_code=94125

Order

2

Type

Original Article

Type Code

103

Publication Type

Journal

Publication Title

Egyptian Journal of Aquatic Biology and Fisheries

Publication Link

https://ejabf.journals.ekb.eg/

MainTitle

Some Fisheries and Biological Aspects of the Crayfish Procambarus clarkii (Girard, 1852) in the River Nile, Egypt

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Type

Article

Created At

22 Jan 2023