Effect of Environmental Variations on Macro-benthos Occurrence and Abundance of the Red Sea Coast of Egypt

El-Sokkary, Samaa; Obuid-Allah, Ahmad H.; El-Wakeil, Khaleid Abd; Omer, Mohsen

doi:10.21608/aunj.2022.139052.1014

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Animals are valuable tools as bioindicators to monitor marine pollution and have been largely used to measure the quality of health of the coastal environment (Al-Howiti et al, 2020 ; Hamza-Chaffai, 2014 ). Echinometra mathaei (de Blainville, 1825) (Echinoidea) and Tridacna squamosa Lamarck, 1819 (Bivalvia) were chosen as models in the present study because of their abundance along the Red Sea coast (El-Sokkary et al, 2022 ; Mahdy et al, 2019 ) and their tolerance to various pollutants (Al-Howiti et al, 2020 ; Vahideh et al, 2012 ). Both animals have vital roles in marine ecosystems (e.g., they as filter, and detritus feeders clean the habitats as well as accelerate detritus decomposition.…”

Section: Introductionmentioning

confidence: 99%

Influences of habitat and seasonal changes on gonadal maturation of Echinometra mathaei (Echinodermata: Echinoidea) and Tridacna squamosa (Mollusca: Bivalvia) in the Red Sea, Egypt

El-Sokkary,

El-Wakeil,

Obuid-Allah

et al. 2023

Environ Monit Assess

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The present work is aimed at investigating the effects of seasonal changes and habitat conditions on reproductive state and gonadal development of two macrobenthic fauna. Echinometra mathaei and Tridacna squamosa were collected seasonally (summer and winter) in July 2019 and January 2020 from three sites along the Red Sea coast, Egypt: Hamraween, Sedy Malek, and Porto Ghalb. Sexual differences and gonadal maturation in the two species were determined by performing biopsies of their gonads followed by morphologic analyses. Hematoxylin and eosin–stained gonadal sections were examined and analyzed. In E. mathaei, reproductive behavior was more active in the summer than in the winter; in T. squamosa, reproductive behavior was active almost all the year, especially during the winter. The reproductive activity and gonadal maturation of both species were affected by environmental factors. The results indicated that temperature is a vital factor affecting the reproductive activity of both species. This study concluded that temperature fluctuations may pose significant challenges to coastal marine ecosystems.

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