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Mubarak, Shumaila
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Environmental Science

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Occurrence and abundance of copepods in zooplankton assemblages at Sonmiani Bay, northern Arabian Sea Mubarak, Shumaila; Muhammad Ali, Qadeer
Journal of Marine Studies Volume 3, Issue 1 (March, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/joms.v3i1.24428

Abstract

This research study reports the first data on seasonal assessment of copepod-specific distribution in Sonmiani Bay. It provides a baseline dataset for future study of planktonic biodiversity in the region by documenting seasonal variations in species-level abundance and related environmental parameters. Zooplanktons were sampled during the high tide with seasonal intervals, i.e., Intermonsoon (April), Southwest monsoon (July), Intermonsoon (October), and Northeast monsoon (January). Physicochemical parameters of water were also recorded in situ on a seasonal basis. A total of 41 copepod species across 23 genera and 17 families were identified, with Calanoida emerging as the dominant order. Centropages dorsispinatus, Subeucalanus crassus, Labidocera pectinata, and Acartia spinicauda showed seasonal dominance during the study period. Principal component analysis (PCA) revealed that water temperature, salinity, and dissolved oxygen were the primary drivers of copepod distribution, with PC1 explaining 37.2% and PC2 24.2% of the total variance (Eigenvalues: 4.09 and 2.66, respectively). The study reveals the ecological importance of copepods within the zooplankton assemblages at Sonmiani Bay and provides baseline data for future biodiversity monitoring and management in the coastal waters of Pakistan.
New records of family Pontellidae (Copepoda: Calanoida) from the northern Arabian Sea Mubarak, Shumaila; Ali, Qadeer Muhammad; Abo-Taleb, Hamdy
Journal of Marine Studies Volume 3, Issue 2 (July, 2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/joms.v3i2.26615

Abstract

This study reports six (06) new records of Pontellidae copepods from northern Arabian Sea of Pakistan: Labidocera kuwaitiana, Labidocera pavo, Labidocera aff. euchaeta, Pontella danae, Pontellopsis herdmani and an unidentified Pontellopsis sp. Specimens were collected from mangrove areas of Shahbunder Creek, Phitti Creek, and Sonmiani Bay during seasonal monsoon intervals from April 2018 to January 2020. Identification was based on morpho-taxonomic examination of appendages using light microscopy and comparison with published taxonomic literature. Voucher specimens deposited in the Marine Reference Collection & Resource Centre, University of Karachi for future references. With these additions, the total number of Pontellidae species known from Pakistan brings the total to 17. The occurrence of species previously documented in the Arabian Gulf and Indian Ocean suggests that seasonal monsoon currents and coastal upwelling may facilitate their dispersal into Pakistani waters. By filling gaps in regional taxonomy, this study highlights the ecological importance of mangrove-associated habitats and emphasizes the need for continued surveys and molecular approaches to better understand copepod diversity and distribution in the northern Arabian Sea.
Co-Authors Abo-Taleb, Hamdy Ali, Qadeer Muhammad Muhammad Ali, Qadeer