Papers by Jusmaldi Jusmaldi
Berita Biologi, Dec 19, 2023
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Al-Kauniyah : jurnal biologi, Dec 17, 2023
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Acta Aquatica: Aquatic Sciences Journal
This study aims to analyze growth patterns, condition factors, and gonad maturity of the white-sp... more This study aims to analyze growth patterns, condition factors, and gonad maturity of the white-spotted spinefoot (Siganus canaliculatus, Park 1797) in coastal waters of Bontang City, East Kalimantan. Fish samples were collected every month from February to June 2020. Fish were collected using a simple random method from the catches of fishers who landed their fish at the Tanjung Limau port, Bontang City. Fish body length was measured using a digital caliper, and body weight was measured using a digital balance. The results of this study obtained a total of 226 individual fish, consisting of 110 males and 116 females. Male fish have a length ranged from 94.78-197.88 mm and a weight ranged from 18.24-94.30 g, while female fish have a body length ranged from 90.00-201.09 mm and a body weight ranged from 17.98-95.16 g. The length-weight relationship shows a strong correlation (r2=0.967) with the regression equation W=5x10-5L2.721. The fish growth pattern is negative allometric. The aver...
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EduBiologia: Biological Science and Education Journal
Penelitian tentang fekunditas dan pola pemijahan ikan sepat rawa (Trichopodus trichopterus Pallas... more Penelitian tentang fekunditas dan pola pemijahan ikan sepat rawa (Trichopodus trichopterus Pallas,1770) dari bendungan Lempake, Samarinda Kalimantan Timur belum pernah diinformasikan. Penelitian ini bertujuan untuk menentukan fekunditas ikan sepat rawa terkait dengan panjang dan bobot tubuh serta menganalisis pola pemijahannya. Sebanyak 30 sampel gonad matang pada ikan betina sepat rawa dikoleksi dari bendungan Lempake, selama kurun waktu dari bulan Januari sampai Maret 2021. Untuk menentukan fekunditas dan pola pemijahan digunakan metoda gravimetri dan pengukuran. Dari hasil penelitian ini diperoleh fekunditas ikan sepat rawa berkisar 448-1257 butir telur per individu ikan, dengan panjang total tubuh berkisar 82,13-112,46 mm dan bobot tubuh berkisar 9,1-22,5 g. Model regresi hubungan antara fekunditas dan panjang total tubuh adalah F=0,0003L3,23 (r=0,877), sedangkan hubungan fekunditas dan bobot tubuh adalah F=58,6W1,0339 (r=0,883). Kisaran diameter telur yang diperoleh adalah 0,41...
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Jurnal Iktiologi Indonesia, 2021
The growth pattern and condition factors of three spots gourami Trichopodus trichopterus (Pallas,... more The growth pattern and condition factors of three spots gourami Trichopodus trichopterus (Pallas, 1770) from Lempake Dam, East Kalimantan, are not yet informed. These studies aimed to investigate fishes' length and body weight, sex ratio, length-bodyweight relationships, growth patterns, and condition factors. The collection of fish sampling was carried out monthly from February to May 2020. A total of 912 individual samples of sepat rawa fish were caught by 15 fish traps using a purposive sampling method at three stations. This research showed that the total length of the fishes analyzed ranged from 31.68 to 103.53 mm, while body weight ranged from 1.12 to 7.22 g. The sex ratio in males and females was 1:1.19. The regression model of the length-body weight relationships calculated was W=3x10-5L2.861 for total samples, W=5x10-5L2.710 for males, and W=2x10-5L2.977 for females. The length-body weight was obtained strong relationships in all samples and sexes, with the regression c...
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The research about growing pattern, condition factor and habitat of Spotted Barb Barbodes binotat... more The research about growing pattern, condition factor and habitat of Spotted Barb Barbodes binotatus (Valenciennes, 1842) was done from August until December 2017. The aims of this research are to know growing pattern, condition factor, sex ratio and habitat of Spotted Barb (Barbodes binotatus) in Berambai Forest River. Fishing was done in every month, using purposive sampling method with some fishing gears. The result of the research shows that growing pattern of Spotted Barb (B. binotatus) was positive allometric, the average value of the condition factor was 1,064. The sex ratio of male and female were 1 : 1,06. The Berambai River in good condition for living of Spotted barb.
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BERITA BIOLOGI, Dec 6, 2019
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Jurnal Iktiologi Indonesia
Bonylip barb (Osteochilus vittatus Valenciennes, 1842) that belongs to the Cyprinidae family is o... more Bonylip barb (Osteochilus vittatus Valenciennes, 1842) that belongs to the Cyprinidae family is one of the native freshwater fishes in Indonesian waters. Currently, status of this species in Benanga Reservoir, East Kalimantan is in over-exploited. Fish resources management, therefore, is needed to maintained fish stock in the reservoir based on fish reproductive biology aspects. The purpose of this study was to analyze some aspects of the reproductive biology including sex-ratio, gonad maturity, length at first gonad maturity, spawning season, fecundity, and spawning patterns as basic information for its management. Fish collection was carried out monthly on the third week from January to May 2019 at three stations. The fish samples were captured by using experimental gill nets with mesh size of 1; 1.5; 2; and 3 inches. A total of 278 bonylip barb was caught, consist of 92 males and 186 females. Sex ratio of male and female in the gonad mature stage was 1: 2.4. The average length at...
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BERITA BIOLOGI
Biology of bonylip barb (Osteochilus vittatus Valenciennes, 1842) in Benanga Reservoir, East Kali... more Biology of bonylip barb (Osteochilus vittatus Valenciennes, 1842) in Benanga Reservoir, East Kalimantan is not yet known. The purpose of this study was to analyze distribution of the length and body weight of fishes, sex ratio, gonad maturity level, length-body weight relationship, and condition factor. In total 278 fishes samples were collected during the five months, from January to May 2019 with a purposive sampling method at Benanga Reservoir, and gill net with mesh size 0.5; 1; and 1.5 inches used. The results of this research showed that the total length of the fishes analyzed ranged from 72.21–196.57 mm and body weight ranged from 5.12–89.21 g. The sex ratio of male and female were 1:2.02. The male and female fishes were dominated by mature gonad. The length-body weight relationship models calculated for the total fishes sample was W=1x10-5L2.967 (r=0.988) for males, W=5x10-6L3.199 (r=0.989) for females and W=7x10-6L3.126 (r=0.987) for both sexes. Isometric growth patterns ...
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Jurnal Iktiologi Indonesia
Diversity, potentiality and conservation status of fish fauna in upper Mahakam’s tributaries of e... more Diversity, potentiality and conservation status of fish fauna in upper Mahakam’s tributaries of east Kalimantan is unknown. The purposes of this study were to analysis species diversity, determine potentiality and conservation status of fish fauna in upper Mahakam’s tributaries, east Kalimantan. Fish sampling with purposive method was conducted in four tributaries, i.e Tepai River, Pahangai River, Danum Parai River, and Meraseh River for one month. Fishes were collected by several gears type. The results of this research showed that the total number of fish caught was 820 individuals; consist of 26 species, 7 families, and 4 orders. The Cyprinidae was the most dominant family found in all tributaries. The Shannon-Wiener diversity index in four tributaries were varied and ranging from 1.749-2.087. The highest fish diversity was recorded at Maraseh River followed by Pahangai River, Danum Parai River, and Tepai River. The low fish diversity was discovered at Tepai River may be due to d...
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Jurnal Pendidikan Matematika dan IPA
Research on diversity and composition of fish at low tide and high tide condition in downstream K... more Research on diversity and composition of fish at low tide and high tide condition in downstream Kelay River, District Berau, East Kalimantan is not yet know. The purpose of this research was to determine diversity and composition of fish that present at low tide and high tide condition in downstream Kelay River. In research using purposive sampling method and various sizes gill nets used. Results of this research shows that fish were collected at three locations sampling in downstream Kelay River consist of 14 species, 9 families, and 953 individuals. Based on the number of species, diversity Shannon-Wiener index and dominance index has stable of communities, with high value of diversity index (H'=1.975), high evenness index (E=0.749), and low value of dominance index (D= 0.173). The number of fish species found at low tide were 11 species and at high tide were 12 species. The similarity index of fish species at low tide and high tide condition were 64.3%.
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Proceeding of Biology Education
Sebaran dan kekayaan spesies ikan lais (famili Siluridae) di Sungai Mahakam Kalimantan Timur belu... more Sebaran dan kekayaan spesies ikan lais (famili Siluridae) di Sungai Mahakam Kalimantan Timur belum banyak diketahui. Tujuan dari penelitian ini adalah untuk mengetahui sebaran spasio-temporal dan kekayaan spesies ikan lais di bagian hulu dan tengah Sungai Mahakam. Pengambilan contoh ikan dilakukan setiap bulan selama satu tahun dengan metode purposive sampling menggunakan berbagai jenis alat tangkap di empat lokasi penelitian yang meliputi bagian hulu Sungai Mahakam (Sungai Tering) dan bagian tengah Sungai Mahakam (Danau Semayang, Sungai Belayan dan Sungai Kedang). Data yang diperoleh dianalisis secara deskriptif. Hasil penelitian menunjukkan total ikan lais yang dikoleksi berjumlah enam spesies dan dua genus dari total 2567 individu yang tertangkap. Sebaran spesies berdasarkan lokasi penangkapan menunjukkan Ompok miostoma dan Kryptopterus apogon ditemukan pada semua lokasi, sedangkan Kryptopterus bicirrhis ditemukan hanya di Sungai Tering. Kelimpahan individu Ompok miostoma paling...
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Jurnal Iktiologi Indonesia
Silurid catfishes O. miostoma (Vaillant, 1902) is an endemic species in Mahakam Watershed East Ka... more Silurid catfishes O. miostoma (Vaillant, 1902) is an endemic species in Mahakam Watershed East Kalimantan. Biology reproduction aspect of this species is not yet known. The purpose of this study was to determine the stages of gonad maturation characteristics, egg size, and spawning type. Fish sampling conducted monthly from November 2013 to Oc-tober 2014, using many gears at four locations in Mahakam Watershed, i.e: Semayang Lake, Belayan River, Siran River and Tering River. To determine the stages of gonad maturation in silurid catfishes were carried out by morphologic and histologic examination methods. Spawning fish type was determined based on the distribution of eggs diameter. The results of this research showed that there are five gonad maturation stages of males and females of silurid catfishes. Dis-tribution of eggs diameter in gonad maturity stages ranges from 0.54 – 1.30 mm with simultaneous spawning type.AbstrakIkan lais O. miostoma (Vaillant 1902) adalah spesies ikan end...
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