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Length-Weight Relationship and Condition Factor of Introduced Red Devil Cichlid Amphilophus labiatus, in Lake Sentani, Indonesia Ohee, Henderite L.; Mote, Norce; Rice, Michael A.; Sujarta, Puguh; Surbakti, Suriani
Jurnal Biologi Papua Vol 16 No 1 (2024)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jbp.3321

Abstract

Papua’s freshwater ecosystems in the western part of New Guinea have begun to record widespread introductions of invasive species over the past decade. This lake's most dominant and common exotic species is Amphilophus labiatus (Günther, 1864). A study was conducted to document the length-weight relationship and condition factor of these fish in Lake Sentani. From June to August 2019, fish were caught using floating gillnets at six locations around the lake. Total length (TL) (mm), body depth (mm), and body weight (grams) were measured, and condition factor based on gender, body weight, and body length were observed in 345 fish, including 264 males and 81 males. The growth pattern of A. labiatus is positively allometric, with b values ranging from 3.19 to 3. 20 and coefficients of determination (r2) ranging from 0.84 to 0.87. Although the average body length of A. labiatus males was shorter than females, condition factor (CF) values were not significantly different between the sexes and ranged from 0. 64 to 2.03 (0.97 ± 1.17, mean ± SD). For males, it went from 0.67 to 1.19 (0.94 ± 0.13 mean ± SD). However, monthly CF data show a significant decrease in CF in August, suggesting that spawning events occur in late July or early August. A. labiatus grows well and colonizes habitats throughout Lake Sentani.
Sebaran Populasi Staurastrum di Perairan Danau Sentani Jayapura Sujarta, Puguh; Ohee, Henderite L.; Mishbach, Imam; Ngamelubun, Gerardinalia; Farmawaty, Farmawaty
Jurnal Biologi Papua Vol 16 No 2 (2024)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jbp.4084

Abstract

Staurastrum is a microalgae from the family of Desmidiaceae which is abundant in freshwater. The purpose of this study was to determine the diversity of Staurastrum and the abundance of the population of Staurastrum in the Sentani Lake Jayapura. The study was conducted in March 2018 in the Sentani Lake Jayapura. The sampling method used was the survey method by sampling water in 6 locations (Kampung Yakonde, Ifale, Hobong, Kalkhote, Ayapo, Puay) on the edge and center of the lake. The results showed that 4 species of Staurastrum on the Sentani Lake were S. arachne, S. diacathum, S. gracile and S. incisum The abundance of the Staurastrum population highest at the location of Ayapo (103), Puay (94), Hobong (89), Kalkhote (81), Ifale (77) and Yakonde (8). In terms of the similarity index, there are 7 sampling points that are very similar, 23 that are similar, 20 that are dissimilar, and 16 that are very dissimilar. The difference in sampling location shows that sampling in the central part of the lakes has a higher population abundance compared to edge of the lake. In conclusion there are 4 species of Staurastrum, the location of Ayapo is higher in abundance, and the central part of the Lake is higher in abundance.    Key words: Desmidiaceae; Jayapura; Lake; Sentani; Staurastrum. 
Pelatihan dan Pendampingan Kader Lingkungan Hidup Untuk Generasi Muda Pimpinan Wilayah Muhammadiyah (PWM) Papua Sujarta, Puguh; Suwito, Suwito; Rahayu, Irma; Suharno, Suharno; Farmawaty, Farmawaty; Tangkepayung, Natalie J.
JURNAL PENGABDIAN PAPUA Vol 9 No 3 (2025)
Publisher : LPPM Uncen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jpp.v9i3.4915

Abstract

The younger generation has an important role in preserving the environment. The objectives of the community service activities: (1) to introduce environmental cadre training and mentoring programs for the younger generation of PWM Papua; (2) through community service, it can produce outputs in the form of accredited national community service journals. This community service activity was carried out on Monday, August 25, 2025 at the Environmental Assembly - IPM PWM Papua. The methods used were lectures, discussions, and real actions. The activity participants were 21 participants, starting with a pre-test (in the form of a questionnaire) to identify participant knowledge. Then the provision of material about environmental cadres and ending with a post-test with the quizziz.com application. The conclusion is that: (1) Participants were very enthusiastic in participating in community service activities and understanding the environmental cadre training material; (2) Based on the evaluation results, it shows that the level of participant understanding is quite good when seen from the percentage of participant statements and answers.