Detailed data are rarely available to show how interventions such as captive breeding programs can create an uncontrolled demand for live specimens of endangered species. We present a case study of the effect of a planned, internationally recognized captive breeding program on trade in the endangered babirusa wild pig from July to December 1998. Although the program had not yet begun, international interest in the captive breeding of babirusas gave hunters and dealers the false impression that there was a potentially lucrative and officially sanctioned national and international demand for any live babirusas they might catch. Swift action by the Indonesian authorities halted this trade, but the study provides a warning about the damage that can be caused to the conservation of a species if management programs are instituted without a full understanding of the practicalities of its conservation, particularly interactions between the species and local people.
Salah satu faktor yang menentukan kualitas perguruan tinggi adalah persentasi kemampuan mahasiswa untuk menyelesaikan studi tepat waktu. Saat ini, masalah kegagalan studi siswa dan faktor - faktor penyebabnya menjadi topik yang menarik untuk diteliti. Perguruan tinggi perlu mendeteksi perilaku mahasiswa yang memiliki status “tidak diinginkan” tersebut sehingga dapat diketahui faktor - faktor penyebab kegagalannya. Berdasarkan uraian di atas, diperlukan analisa terhadap data-data mahasiswa sepeti Jenis Kelamin, Umur, Agama, Tempat tinggal, IPS, Disiplin, dan Hutang, berdasarkan data mahasiswa yang dimiliki sebanyak 97 data sehingga bisa dimanfaatkan dalam pengolahan data mining. Di mana data mining digunakan untuk menggali dan mendapatkan informasi dari data dengan jumlah besar. Salah satu metode data mining adalah pengklasifikasian data. Dengan menggunakan Metode Klasifikasi dengan konsep Algoritma Decision tree C4.5 menghasilkan accuracy sebesar 90.00%, hasil dari precision adalah 87.50, dan hasil dari recall sebesar 100%. Diharapkan dapat meningkatkan keinginan Lembaga Universitas atau Perguruan tinggi untuk memberikan pikiran yang baik, pandangan, dan kebijakan baru kepada mahasiswa yang memiliki permasalahan dalam perkuliahan, dengan kata lain memaksimalkan mahasiswa dalam upaya peningkatan persentase minat kuliah mahasiswa.
The excessive use of Mud Shells (Anodentia edentula) as a staple food by the people of Kalangan Village, Central Tapanuli Regency caused the decline of the shellfish population. This is marked by the scattering of mud shells at research sites and often people conduct shell-searching activities at low tide. Therefore, a scientific study is needed to know the density and distribution patterns as the basis for the possibility of cultivation activities, management of mud shell germplasm (Anodentia edentula), and mangrove ecosystems in kalangan area in the future optimally, sustainably, and sustainably. The study was conducted in September 2020, using the 1x1m2 transect method purposive sampling at low tide. The results showed that the density of Mud Shells (Anodentia edentula) amounted to 150 ind/m2 in Station I, 0 ind/m2 in Station II with distribution pattern clustering, and 43 ind/m2 in Station III with distribution pattern random. With the evidence that there is a research station that contain zero mud clam and with unsimilarity in distribution pattern that should be clustering in every research station, therefore it can be concluded that the abudance of mud clam in the ecosystem already decline both quantifically and qualitativelyand requires conservation and cultivation action to ensure its existence in the future.
Shellfish is one of the organisms that have habitat in mangrove forests because it has a muddy substrate. However, mangrove forests in the coastal area of Kalangan, Central Tapanuli Regency have suffered environmental damage. Therefore, a research on the density and pattern of shellfish distribution is needed to be a recommendation for optimal, sutainable mangrove forest management. This research was conducted in September 2020. The method used in determining the location of sampling is purposive sampling method using 1x1m2 plot on the surface of muddy sand substrate. The results showed that the population density of Anodentia edentula 32 ind/m2 at Point I with grouping distribution patterns; Cerithidea cingulata 74 ind/m2 at Point I (grouping), 156 ind/m2 in Point II (grouping), and 126 ind/m2 in Point III (grouping); Cerithidea quadrata 2 ind/m2 in Point I (uniform); Clypeomorus sp 12 ind/m2 at Point I (uniform); Nerites sp 178 ind/m2 at Point I (group), 94 ind/m2 at Point II (group), and 418ind/m2 at Point III (grouping); Donax trunculus 3 ind/m2 at Point I (uniform); Sulcospira testudinaria 1 ind/m2 at Point I (uniform), 79 ind/m2 at Point II (grouping), and 32 ind/m2 at Point III (random), and Telescopium telescopium 2 ind/m2 at Point I (uniform), and 1 ind/m2 at Point III (random). So it can be concluded that the biodiversity of mollusca in mangrove forest ecosystems in the coastal area of Kalangan, Central Tapanuli Regency, is of low value so that it needs to be maintained for the sake of ecosystem balance and the availability of germplasm for future generations.
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