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    Analysis of Microplastic in Holothuria leucospilota (Echinodermata-Holothuroidea) and Sediments from Karachi coast, (Northern Arabian Sea)
    (2023) Ahmed, Quratulan; Öztekin, Ayşah; Alı, Qadeer Mohammad; Bat, Levent; Shaikh, Iqra
    Microplastics are found in all aquatic environments, and they can have several negative impacts on marine life. In this study, the distribution of microplastics in the sediment and in the organs (gut, respiratory tree, and tentacles) of sea cucumber (Holothuria leucospilota) collected from Mubarak Village and Cape Monze on the Karachi coast of Pakistan were investigated. The microplastic amount in different organs of H. leucospilota was found as 15.3-40.45 pieces/individual in the gut, 15.45-23.9 pieces/individual in the respiratory tree, 8.9-9.55 pieces/individual in tentacles. The microplastic amount of sediment samples was 57.40-129.35 pieces/kg. Fibers were the dominant microplastic type, up to 99% of all samples. The results of the present study show that the region is contaminated with microplastics both in biota and in sediments.
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    Preliminary Observation on Microplastic Contamination in the Scombridae Species From Coastal Waters of Pakistan
    (2022) Yousuf, Farzana; Bat, Levent; Öztekin, Ayşah; Alı, Qadeer Mohammad; Ahmed, Quratulan; Shaikh, Iqra
    Microplastics are one of the major pollution problems nowadays, have been found in both marine environments and various fish species worldwide. In this study, the presence of microplastics in the digestive systems and the gills of 6 species from the Scombridae family on the coast of Karachi in Pakistan was investigated. A total of 336 fish were examined for the presence of microplastic in gills and the digestive systems. Microplastics were detected in digestive systems and gills in 11.11%-19.51% and 58.62%-85.71% of total individuals, respectively. The number of microplastics varied from 0.19 to 1.12 items.ind-1 in digestive system and 1.5 to 7.04 items.ind-1 in gill. Fibre was dominant in both gills (98.67-99.17%) and digestive systems (100%). More extensive and further investigations are needed on microplastic contamination of the biota on the Pakistan coast.
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    Two New Records of Eunicidae (Annelida, Errantia) Along the Makran Coast of Pakistan, Northern Arabian Sea
    (Natural and Engineering Science, 2023) Ali, Qadeer Mohammad; Ahmed, Quratulan; Mubarak, Shumaila; Baloch, Ateeqa; Bat, Levent; Qazi, Hafsa; Shaikh, Iqra
    The Makran coast of Pakistan in the Northern Arabian Sea is a region of high biodiversity yet remains relatively under-studied in terms of polychaete fauna. In this study, we presented detailed morphological and taxonomical analyses of two newly discovered species of Eunicidae polychaetes, Eunice indica and Lysidice ninetta, collected during low tide from the intertidal zone of two stations along the Makran coast: Shamal Bandar, Pasni dated 31st January 2022 and Taak Beach, Ormara, dated 31st January 2022. Before our study, only 12 species of Eunicidae were known to occur in Pakistan. The identification and description of E. indica and L. ninetta provide important information about the distribution and taxonomy of Eunicid polychaetes on the Makran coast. These findings emphasize the need for further investigations and highlight the potential for discovering additional species within the region. © 2023, Natural and Engineering Science. All rights reserved.
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    Two New Records of Polychaetes (Annelida) from Makran Coast of Balochistan, Pakistan (Northern Arabian Sea)
    (2024) Alı, Qadeer Mohammad; Ahmed, Quratulan; Baloch, Ateeqa; Mubarak, Shumaila; Qazi, Hafsa; Shaikh, Iqra; Kurt, Güley
    The Makran coast of Balochistan (Pakistan) is rich in terms of biodiversity particularly marine invertebrates. The study based on comprehensive assessment of the morphological and taxonomical description of two polychaete species (Eunice petersi Fauchald, 1992 and Hesione intertexta Grube, 1878). The newly recorded polychaete species for the coast of Pakistan belong to the Eunicidae and Hesionidae families and were identified in benthic samples collected from the intertidal zone on Garyan and Bandari beaches at Jiwani of the Makran coast (Northern Arabian Sea). The descriptions, photographs, and drawings of the taxonomic characters of species and their distribution are provided. The specimens are deposited in the repository of the Marine Reference Collection and Resource Centre, University of Karachi.