Electronic Theses and Dissertation

Tujuan dari penelitian ini adalah untuk mengetahui aspek biologi reproduksi meliputi rasio kelamin, tingkat kematangan gonad, indeks kematangan gonad, indeks berat daging, dan keterkaitan IBD dan IKG Lingula sp. di perairan Kuala Gigieng, Aceh Besar. Penelitian ini dilaksanakan pada bulan Desember 2021 sampai dengan Januari 2022 dengan lokasi penelitian di Perairan Kuala Gigieng, Aceh Besar. Penentuan lokasi pengambilan sampel dilakukan secara Purposive sampling. Hasil penelitian ini hanya ditemukan satu jenis Lingula, yaitu Lingula anatina Lamarck, 1801. Hasil rasio kelamin yang didapat secara keseluruhan antara Lingula jantan dan betina yaitu 1:1,2. Hasil rasio kelamin yang didapatkan setiap minggu di perairan Kuala Gigieng menunjukkan keseimbangan antara Lingula jantan dan betina. Hasil analisis indeks kematangan gonad diperoleh nilai IKG Lingula jantan berkisar 4,24-7,57% sedangkan Lingula betina berkisar 4,37-6,97%. Hasil indeks berat daging (IBD) Lingula jantan sebesar 32,69-40,81% dan Lingula betina sebesar 32,86-41,20%. Lingula jantan yang ditemukan memiliki tingkat kematangan gonad I, II, III, dan IV sedangkan Lingula betina yang ditemukan memiliki tingkat kematangan gonad II, III, dan IV. Lingula jantan yang paling banyak ditemukan pada TKG IV sedangkan Lingula betina pada TKG III. Hasil histologi gonad Lingula betina TKG IV memperlihatkan bentuk dinding folikel yang mulai kosong dan menjadi lebih tipis. Hasil pengamatan histologi gonad Lingula jantan TKG IV menunjukkan sebagian sel-sel sperma telah dikeluarkan sehingga terlihat beberapa dinding folikel mulai kosong dan menjadi lebih tipis.

Kata Kunci : Kuala Gigieng, Lingula, Rasio Kelamin, IKG, IBD, TKG

The purpose of this study was to determine aspects of reproductive biology including sex ratio, gonadal maturity level, gonadal maturity index, meat weight index, and the relationship between IBD and IKG Lingula sp. in the waters of Kuala Gigieng, Aceh Besar. This research was conducted from December 2021 to January 2022 with the research location in Kuala Gigieng Waters, Aceh Besar. Determination of the sampling location is done by purposive sampling. The results of this study found only one type of Lingula, namely Lingula anatina Lamarck, 1801. The overall sex ratio between male and female Lingula was 1:1,2. The sex ratio results obtained every week in Kuala Gigieng waters show a balance between male and female Lingula. The results of the analysis of the gonad maturity index obtained that the IKG values of male Lingula ranged from 4.24-7.57% while female Lingula ranged from 4.37-6.97%. The meat weight index (IBD) of male Lingula was 32.69-40.81% and female Lingula was 32.86-41.20%. The male lingula found had gonad maturity levels I, II, III, and IV while the female lingula found had II, III, and IV gonad maturity levels. The male lingula was mostly found in TKG IV, while the female lingula was found in TKG III. Histological results of the female Lingula TKG IV gonads showed the shape of the follicular wall that began to empty and become thinner. Histological observations of Lingula TKG IV male gonads showed that some of the sperm cells had been removed so that some of the follicular walls began to empty and become thinner. Keywords: Kuala Gigieng, Lingula, Sex Ratio, IKG, IBD, TKG