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172860

The Growth Parameters of the Mako Shark Isurus Oxyrinchus (Rafinesque, 1810) in the Moroccan Central Atlantic Coast

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Last updated: 01 Jan 2025

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Abstract

    The present study was carried out through regular biological sampling operations of the mako shark during a period of 24 months (October 2017 - August 2019). Specimens were collected from the commercial catches of artisanal boats operating in the Moroccan Central Atlantic Coast and landing at Sidi Ifni Port. A total of 1088 individuals were examined, including 567 females and 521 males. The total length (TL) of both sexes combined ranged from 60 to 317cm, with an average of 150.83 ± 41.51cm (mean±sd). Dominant sizes varied between 105 and 195 cm (TL). The linear regression equations showed a good positive correlation between the different body lengths (0. 983 -05 * L2.6092 , showed significantly lower allometry for the two sexes combined. The parameters of the Von Bertalanffy linear growth equation for both sexes combined were estimated as L = 313.24 cm, K=0.15 year-1 and t0 = -0.68. For the same age, the sizes of males were recorded larger than those of females. Moreover, results showed that the determined longevity (tmax) was 24.75 years for males and 26.65 years for females.

DOI

10.21608/ejabf.2021.172860

Keywords

Mako shark, Morphometry, Weight-length, Linear growth, longevity, Morocco

Authors

First Name

Jihade

Last Name

Alahyene et al.

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Orcid

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Volume

25

Article Issue

3

Related Issue

25018

Issue Date

2021-05-01

Receive Date

2021-05-27

Publish Date

2021-05-01

Page Start

119

Page End

136

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_172860.html

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https://ejabf.journals.ekb.eg/service?article_code=172860

Order

9

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

The Growth Parameters of the Mako Shark Isurus Oxyrinchus (Rafinesque, 1810) in the Moroccan Central Atlantic Coast

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Article

Created At

22 Jan 2023