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Abundance and Growth of Gulamah Fish (Johnius trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai North Sumatra
No full textBELLA ATIKA LBS Abundance and Growth of Gulamah Fish (Johnius
trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai North
Sumatra (under the guidance of DESRITA as Chair of the Advisory Commission).
Research on the Abundance and Growth of Gulamah Fish (Johnius
trachycephalus) in the Waters of Tanjung Beringin Serdang Bedagai, North
Sumatra aims to determine the Abundance, Growth Patterns, and Condition
Factors of Gulamah Fish (Johnius trachycephalus) in the Waters of Tanjung
Beringin Serdang Bedagai, North Sumatra. Sampling of gulamah fish (Johnius
trachycephalus) was carried out from October to December 2024 in the Waters of
Tanjung Beringin Serdang Bedagai, North Sumatra using a dragon trap measuring
6-8 meters, ½ inch mesh, length and width of the side 15x30 cm, and a diameter of
the mouth of the net opening 15 cm. Sampling of gulamah fish was carried out every
30 days starting at 08.00 WIB – 16.00 WIB. At each sampling, the trap fishing gear
was lowered 3 times. The number of individuals of the gulamah fish obtained at
each station was counted, the catch was separated at each station, the length and
weight of the fish were measured, then an analysis was carried out which included
abundance, growth patterns, and condition factors (FK). Measurement of physical
and chemical parameters of the waters including temperature, depth, brightness,
salinity, dissolved oxygen, and pH was carried out directly in the field at each
station with 3 repetitions. The results of the study obtained a sample size of 382
gulamah fish (Johnius trachycephalus). With 247 females and 135 males. The
highest abundance of gulamah fish was at station III and the lowest at station I, but
the abundance of the three stations was still high. The growth pattern of gulamah
fish at stations I, II, and III in the Tanjung Beringin Serdang Bedagai Waters was
negative allometric. The condition factor of gulamah fish at stations I, II, and III
was said to be less flat.133 PagesSkripsi Sarjan
Penerapan Strategi Pembelajaran Group To Group Exchange untuk Meningkatkan Keaktifan Belajar Siswa Pada Tema Sehat Itu Penting di Kelas V SD Muhammadiyah 010 Air Tiris Kecamatan Kampar Kabupaten Kampar.
Get PDFABSTRAK
Refni Desrita, (2020): Penerapan Strategi Pembelajaran Group To Group Exchange untuk Meningkatkan Keaktifan Belajar Siswa Pada Tema Sehat Itu Penting di Kelas V SD Muhammadiyah 010 Air Tiris Kecamatan Kampar Kabupaten Kampar.
Tujuan penelitian ini adalah untuk mengetahui apakah dengan penerapan strategi pembelajaran group to group exchange dapat meningkatkan keaktifan belajar siswa pada tema sehat itu penting di kelas V SD Muhammadiyah 010 Air Tiris Kecamatan Kampar Kabupaten Kampar. Penelitian ini dilatarbelakangi oleh rendahnya keaktifan belajar siswa pada tema sehat itu penting. Penelitian ini adalah Penelitian Tindakan Kelas. Subjek penelitian ini adalah 1 orang guru dan siswa kelas V tahun pelajaran 2020-2021 dengan jumlah siswa sebanyak 20 orang. Sedangkan objek dalam penelitian ini adalah penerapan strategi pembelajaran group to group exchange untuk meningkatkan keaktifan belajar siswa. Penelitian ini dilaksanakan dua siklus, tiap siklus dilaksanakan 2 kali pertemuan. Teknik pengumpulan data yang digunakan dalam penelitian ini adalah teknik observasi, dan dokumentasi. Berdasarkan hasil penelitian diketahui bahwa keaktifan belajar siswa hanya mencapai 48% atau tergolong “Kurang Baik”. Pada siklus I meningkat menjadi 63% atau tergolong “Cukup Baik”. Pada siklus II persentase keaktifan belajar siswa meningkat menjadi 83% atau tergolong “Baik”. Dengan demikian dapat diambil kesimpulan bahwa strategi pembelajaran group to group exchange dapat meningkatkan keaktifan belajar siswa pada tema sehat itu penting di kelas V SD Muhammadiyah 010 Air Tiris Kecamatan Kampar Kabupaten Kampar.
Kata Kunci: Strategi Pembelajaran Group To Group Exchange, Keaktifan Belaja
Produktivitas Primer dengan Metode Klorofil-a di Perairan Belawan Sumatera Utara.
No full textAMANDA PARAMITHA, Primary Productivity with chlorophyll-a method in
Belawan, North Sumatera. Under academic supervision of BUDI UTOMO and
DESRITA.
There many activities around marine Belawan alters the marine water
quality of Belawan. The information and understanding of environmental change
are indispensable in ecosystem monitoring efforts. This research aims for
knowing the value of primary productivity, chlorophyl-a, and the relationships
between physical and chemical factors was done on Desember 2013 – February
2014 in Marine of Belawan, North Sumatera. The sampling was determined based
on four location which is in various activities. There are 4 sampling in 3 months.
The analysis of other factor, such as water temperature, pH, brightness, salinity,
DO, nitrate, phosphate, and chlorophyll.
The research result of chlorophyll-a showed there was a relation of
physical chemical factors in marine of Belawan, North Sumatera. The range of the
chlorophyll-a is 1,93 – 5,96 mg/ m3. The highest concentration of chlorophyll-a
was located in floating net cages in the range of 4,06 – 5,96 mg/m3. The lowest
concentration of chlorophyll-a was located in offshore in the range of 1,93 – 2,53
mg/m3. The average value chlorophyll and primary poductivity top are on the
location 4 and the lowest in the location.61 HalamanSkripsi Sarjan
Struktur Komunitas Bivalvia di Perairan Pantai Cermin, Kabupaten Serdang Bedagai
No full textNANDA MUTIA HARDIANTI. Community Structure of Bivalve in Cermin
Beach, Serdang Bedagai Regency. Supervised by YUNASFI and DESRITA.
The Cermin Beach has a higher natural value such as biodiversity, one
of them is bivalve. The objective this research is to study the community
structure of bivalve and waters condition in Pantai Cermin of Serdang Bedagai
Regency. This research was conducted since June - August 2013 using transec
method at 3 station and 4 time interval of sampling. The observed physical and
chemical parameter are temperature, salinity, pH, DO, TSS, and type of basic
substrate.
Bivalve are found in Cermin Beach of Serdang Bedagai Regency consists
15 species, i.e. Spisula solida, Mactrellona alata, Mactrellona exolata, Mactra
ornata, Donax cuneatus, Donax faba, Paphies subtriangulata, Batissa fortis,
Hiatula diphos, Anadara floridana, Pinctada margaritifera, Pinna carnea,
Modiolus americanus, Musculus senhousia, Anadara uropygimelana. The species
with most value on each station is Donax cuneatus with the abudance in station I
that is 150 ind/m2, the abudance in station II that is 331 ind/m2 and abudance in
station III is 247 ind/m2. The species diversity index of bivalve range from 0,85 –
1,22, uniformity index of bivalve range from 0,18 – 0,30, domination index of
bivalve range from 0,35 – 0,57 and pollution index range from 1,23 – 1,61 is
lightly polluted.99 HalamanSkripsi Sarjan
Komunitas Makrozoobentos di Sungai Percut Kecamatan Percut Sei Tuan Kabupaten Deli Serdang Sumatera Utara
No full textDAVID PUTRA PARLINDUNGAN SITUMORANG. Makrozoobentos
Community in Percut River of Percut Sei Tuan District Deli Serdang Regency
North Sumatera. Supervised by HASAN SITORUS and DESRITA.
Percut river is one of the rivers that flow in Deli Serdang which empties
into Malaka Straits with an area 514,20 km2. The purpose of this research was to
determine the macrozoobentos community and correlation between chemical
physics with macroozobentos communities in the Percut River Deli Serdang
Regency. This research was conducted in July – Agust 2014, by using purposive
random sampling method on 4 stations with 4 times sampling time interval.
Physical and chemical parameters were observed as temperature, flow rate,
turbidity, TSS, Substrate, pH, DO, BOD5, TOM.
Macrozoobentos were found in the Percut River of Percut Sei Tuan
District consists of 12 genera that Branchiura, Tubifex, Penaeus, Scylla, Anadara,
Melanoides Thiara, Elimia, Pleurocera, Filopaludina, Nerita dan Pila. The highest
population density is at the first station of 78.2 ind/m2 and the lowest density at
the third station of 26,6 ind/m2. The highest diversity index values found in station
IV was 1.824, while the lowest value found in the first station of 1,049.79 HalamanSkripsi Sarjan
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
RESPON PERTUMBUHAN TUNAS BULBIL PORANG (Amorphophallus muelleri Blume.) DENGAN PEMBERIAN BERBAGAI KONSENTRASI DAN LAMA PERENDAMAN BENZIL AMINO PURIN (BAP)
Get PDFRESPON PERTUMBUHAN TUNAS BULBIL PORANG
(Amorphophallus muelleri Blume.) DENGAN BERBAGAI
KONSENTRASI DAN LAMA PERENDAMAN
BENZIL AMINO PURIN (BAP)
Nofia Desrita (12080220844)
Di bawah bimbingan Novita Hera dan Irwan Taslapratama
INTISARI
Porang (Amorphophallus muelleri Blume) merupakan komoditas pertanian
yang terus mengalami peningkatan nilai ekspor, namun produksinya terkendala
dalam proses perbanyakan. Perbanyakan menggunakan bulbil dinilai paling efektif,
namun membutuhkan waktu yang lama, sebab mengalami masa dormansi. Salah
satu upaya yang dapat dilakukan adalah dengan menggunakan ZPT sitokonin, yaitu
BAP. Penelitian ini bertujuan untuk mendapatkan interaksi, konsentrasi BAP dan
lama perendaman terbaik dalam merangsang pertumbuhan tunas bulbil porang.
Penelitian ini dilaksanakan di Laboratorium Agronomi dan Agrostologi, dan di
rumah kasa UIN Agriculture Research Development Station (UARDS) Fakultas
Pertanian dan Peternakan Universitas Islam Negeri Sultan Syarif Kasim Riau, pada
bulan September sampai November 2023, menggunakan rancangan acak lengkap
(RAL) dua faktor. Faktor pertama yaitu konsentrasi BAP (0, 50, 100, dan 150
mg/L), faktor kedua yaitu lama perendaman (1, 2 dan 3 jam) yang diulang sebanyak
3 kali. Parameter yang diamati yaitu daya bertunas, waktu muncul tunas, panjang
tunas, jumlah tunas, dan persentase tunas berakar. Hasil penelitian menunjukkan
bahwa konsentrasi BAP 150 mg/L dengan lama perendaman 3 jam merupakan
perlakuan terbaik, yaitu pada daya bertunas (100%), waktu muncul tunas (21 hari),
panjang tunas (34,2 cm) jumlah tunas (205 tunas). Konsentrasi BAP terbaik adalah
50 mg/L, yaitu pada persentase tunas berakar (59,1%), dan lama perendaman
terbaik adalah 1 jam, menghasilkan peresentase tunas berakar (56,7%). Maka dapat
disimpulkan bahwa perlakuan terbaik adalah konsentrasi BAP 150 mg/L dengan
perendaman 3 jam.
Kata kunci: bulbil, dominasi apikal, dormansi, meristem apikal, sitokonin,
tuberkel
Pendugaan Potensi Lestari dan Pertumbuhan Ikan Kembung (Rastrelliger spp.) yang di daratkan di Pelabuhan Perikanan Samudera Belawan Sumatera Utara
No full textPUTRI PERMATA SARI SIRAIT. Potential Estimation on Sustainable and
Growth of Mackerel Fish (Rastrelliger spp.) Landed on Belawan Ocean Fishing
Port North Sumatra. Under academic supervised by MOHAMMAD BASYUNI
and DESRITA.
Highly market demand on Mackerel fish (Rastrelliger spp.) effected
overfishing without controling by fishermen. This study was done from Maret
until July 2016, and the aims were to study about the growth pattern, condition
factor, growth parameter, and also potential of sustainable prediction of Mackerel
fish to provide appropriate management model for the fish resource. The primary
data is 442 samples Mackerel fish were observed, while the secondary data is
catches data and fishing effort of Mackerel last 10 years and temperature of sea
surface. Data were processed using software FISAT II. The growth pattern of
Mackerel total is positive allometric. The range of condition factor are 0,58 –
3,10. The Von Bertalanffy growth parameters estimated were asymtotic length
(L∞) = 220,50 mm, growth coefficient (K) = 1,30 year-1 and the age at zero length
(t0) = -0,426. The rate of total mortality (Z) Mackerel fish is 2,564 year-1 with
natural mortality rate (M) 1,249 year-1 and fishing mortality rate (F) 1,315 year-1
thus the rate of exploitation is obtained with the amount 0,513 and the value of
this exploitation rate has exceeded the value of the optimum exploitation, which is
0,5. Potential estimation sustainable use of fish Mackerel Fox models. The
potential of sustainable prediction was performed with Fox model. Value
Maximum Sustainable Yield (MSY) Mackerel fish was 6,276,538.129 kg / year
with optimum effort was 7939.647596 trips / year. Average utilization rate of
70,39% with an average insistence rate (TAC) of 179,49%, while allowable catch
150,1587365 kg/year. Based on the value of MSY and optimum effort Mackerel is
known that fish are already experiencing overfishing. While based on average
utilization rate, Mackerel fish in Belawan waters was still in a condition of solid
catch.106 HalamanSkripsi Sarjan
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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