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    Assessment of semen quality in freshwater mussel Unio elongatulus of Pontastacus leptodactylus eucirrus: analysis of sperm motility, morphometry, and pH El efecto del dimetoato sobre el estrés ox dat vo las estas
    (Univ Zulia, Facultad Ciencias Veterinarias, 2025) Ozgur, Mustafa Erkan
    The freshwater mussel (Unio elongatulus eucirrus), native to the Euphrates River basin in T & uuml;rkiye, holds little economic value; however, it plays an important ecological role in ABSTRACTnatural aquatic ecosystems. Consequently, understanding methoate(DMT)pestcideisoneofthechemicalsused to its biology particularly its reproductive traits, such as semen otect smeagr ultural aeas om harmfulrgni msDMT quality, sperm motility, and morphology is of scientific sidues released drectly or ndirectly o the environment interest. This study aimed to investigate several reproductive parameters in 10 male specimens of this species,including use serous problems in nature.DMT r sdues mixed with the sperm concentration,seminal pH, motility characteristics, and sperm morphometry. Sperm kinematicswere assessed uat c environment adversely affect aquatic rganisms and is effec is carried to humans through the food chain Inhis using a computer-assisted sperm analysis (CASA) system. The udy, oxdativesress responses induced by DMTpesicidein results showed the following sperm velocity values: straight-linentastacusvelocity(VSL:leptodactylus40.75 +/- were6.01 mu m/s),investigated. curvilinearForthisvelocitypurpose,(VCL: 103.00 +/- 2.62 mu m/s),andaverage path velocity (VAP:54.24 idatve stress nd ant oxidant parameters Thioba bituri acid a tive ubstances(TBARS)Glutathione +/- 6.75 mu m/s). Sperm morphometry, analyzed via scanning (GSH) Superox de smutase (SOD) catalase (CAT) and glu ath one perox dase electron microscopy (SEM), revealed a head length of 3.90 +/- 0.11 mu m,head width of 1.70 +/- 0.17 mu m, and tail length of 37.64 +/- 0.45 mu m. Regarding the physicochemical parameters, PX) c used by dimethoate (DMT) pesticide in P. leptodactylus 17 5 1 the seminalpH was 6.25 +/- 0.26, and sperm concentration was , 35, and 70 mg L conce trations at 24 and 96 hours ereinvetigated Results we e deteminedusngELSAkts. 15.48 +/- 0.53 x 109 cells/mL. These results indicate that the morphological and kinematiccharacteristicsof freshwater mussel (Unio elongatulus eucirrus) spermatozoa are quite like ere observedbe w en decreases in CATandGPx activities and those observed in other mussel and fish species. However, it crea es in TBARS leve s SPSS 24 0package prgram one way was determined that spermatozoa are easily activated upon contact with water. OVA (D 0 05