00000ctm a22000003a 4500 UP-8027390931314014322 Buklod 20180413090153.0 m |o d | ta 180413s xx d r |||| u| (iLib)UPVIS-00054089571 Gift VML/ess 4.13.18 eng LG 993.5 1997 B4 Y81 Yu, Rosito D. Jr. Preliminary study of the gonadal development of "imbaw laki", Anodontia edentula (Linne, 1758). Rosito D. Yu,Jr. 1997. vi, 33 leaves illustrations, tables, graphs, and computer print out. Thesis (Undergraduate, Bachelor of Science in Biology) College of Arts and Sciences, University of the Philippines in the Visayas, Iloilo City. The study aimed (1) To gather preliminary information on the sexual maturation of Anodontia edentula by histological descriptions of the gonad, (2) To correlate shell size with stage of gonadal development , and (3) To determine the size range at which sexual maturity is attained. (p)Eighty-one mud clams were obtained from Panubulon, Nueva Valencia, Guimaras and shell lenght, width, height, body and gonad weight were measured. The mud clams were categorized into Subclass 4 (60-70 mm) based on shell lenght. Three to five gonads were randomly selected from each subclass, processed histologically into serial slide sections, and examined under the microscope. , Results suggest that Anodontia edentula is hermaphroditic and protandric such that the testicular region is sexually mature at shell lengths of 30mm or less, and the ovarian region at shell lengths of 50-60 mm. The GSI is inversely related to shell lenght such that as shell length increased, GSI decreased. This attributed to the shrinkage of tissue as spawning and release of gametes progress. Imbaw. Anodotia Edentula. Formacion, Minda j. Adviser. UPVIS UPV-ML LG 993.5 1997 B4 Y81 Thesis