scholarly journals Influência da biomassa inicial sobre o crescimento e a produtividade de peixes em sistema de policultivo

2006 ◽  
Vol 30 (6) ◽  
pp. 1083-1090
Author(s):  
Zélia Maria Pimentel Nunes ◽  
Xavier Lazzaro ◽  
Alberto Carvalho Peret
Keyword(s):  
Cyprinus Carpio ◽  
Oreochromis Niloticus ◽  
Colossoma Macropomum ◽  
Cichla Ocellaris

Analisou-se o crescimento dos peixes, a composição das espécies e a produtividade de quatro policultivos (P75, P78, P87 e P207), visando melhorar o manejo e a produtividade pesqueira dos pequenos açudes (0,1-5,0ha) do Semi-Árido brasileiro. Simulou-se as condições desses açudes em viveiros com 120 e 5.000 m² de área, sem renovação de água, utilizando moderada quantidade de adubo e fertilizante. A biomassa inicial variou de 75 a 207kg ha-1, sendo formada por: tilápia do Nilo (Oreochromis niloticus), curimatã pacu (Prochilodus argenteus), carpa comum (Cyprinus carpio), tambaqui (Colossoma macropomum) e tucunaré (Cichla ocellaris). Os peixes apresentaram baixo crescimento (< 0,01g g-1 d-1) após 75 dias de criação (P78 e 87). O crescimento do tambaqui, da tilápia e da curimatã foi reduzido após 53 dias (P75). Em moderada biomassa, o crescimento do tambaqui foi inferior ao da carpa e da curimatã (P207). A produtividade da tilápia atingiu 720 kg ha-1ano-1 (P78), sendo reduzida para 220 kg ha-1ano-1 devido ao processo reprodutivo (P75 e P207). A produtividade da carpa de 1.600 kg ha-1ano-1 foi superior a dos outros peixes (P87). A biomassa inicial de 75 kg ha-1 (60:30:4:3:3% de tilápia, tambaqui, carpa, curimatã e tucunaré, respectivamente) otimizou o crescimento e a produtividade dos peixes. A utilização de tilápias monossexadas e o fornecimento da alimentação suplementar ao tambaqui tornam-se imprescindíveis ao policultivo.

scholarly journals MONITORING LOGAM BERAT DALAM IKAN LAUT DAN AIR TAWAR DAN EVALUASI NUTRISI DARI KONSUMSI IKAN

2014 ◽  
Vol 17 (1) ◽  
Author(s):  
Th. Rina Mulyaningsih
Keyword(s):  
Cyprinus Carpio ◽  
Oreochromis Niloticus ◽  
Institute Of Medicine ◽  
Colossoma Macropomum

Ikan adalah bahan makanan sumber mineral. Serapan logam berat pada ikan dapat berasal dari air, sedimen maupun pakan ikan. Telah dilakukan monitoring mineral dan kontaminan dalam ikan untuk evaluasi nutrisi dan keamanan pangan, menggunakan teknik analisis aktivasi neutron. Jenis ikan laut dianalisis adalah ikan kembung (Rastrelliger faughni ) ikan tongkol (Acanthocybium solandri), ikan tengiri (Authis thazard) dan ikan air tawar adalah ikan nila (Oreochromis niloticus), ikan mas (Cyprinus carpio), ikan bawal (Colossoma macropomum), yang disampling dari 6 pasar di Jakarta Utara. Hasil monitoring menunjukkan bahwa, mineral esensial yang terkandung dalam ikan adalah Fe, K, Na, Zn, Ca, Mg, dan Se. Konsentrasi Ca dan Se dalam ikan air laut lebih tinggi dibandingkan dalam ikan air tawar. Konsentrasi unsur esensial lainnya bervariasi tergantung jenis ikan. Konsentrasi logam berat As dalam ikan laut 3 kali lebih tinggi dari ikan air tawar. Logam Hg dan Cr terdeteksi dalam semua jenis ikan diamati. Dari evaluasi kecukupan nutrisi, dengan asumsi konsumsi ikan 86,68 gr/hari, untuk laki-laki umur 19 - 30 tahun, dan mengacu data dari Institute of Medicine USA, maka asupan Ca : 2,5 - 6,3; Cl : 1,5 - 3,3; Fe : 11,5 - 26,9; Na : 1,5 - 4,1; K : 3,4 - 6,7 dan Zn 3,9 - 7,2 % dari nilai yang direkomendasikan. Asupan Cr melebihi dari nilai yang direkomendasikan, sedangkan As dan Hg tidak direkomendasikan ada dalam bahan pangan. Pada kenyataannya logam tersebut terkandung di dalam ikan diteliti, tetapi konsentrasinya masih di bawah nilai baku mutu yang dikeluarkan oleh BPOM.

scholarly journals The Effect Of Rajalele Probiotic On Survival Rate Of Fish Juvenile Pangasius pangasius, Oreochromis niloticus, Cyprinus carpio

2020 ◽  
Vol 6 (1) ◽  
pp. 88-95
Author(s):  
Marlina Doloksaribu ◽  
Robert Martua Simanjuntak ◽  
Ied Hidayani Parinduri
Keyword(s):  
Social Sciences ◽  
Experimental Study ◽  
Data Analysis ◽  
Survival Rate ◽  
Cyprinus Carpio ◽  
Oreochromis Niloticus ◽  
Fish Farming ◽  
Randomized Design ◽  
The Social ◽  
Completely Randomized Design

The use of probiotics is certainly one of the solutions in overcoming the problem of increasing seed in fish farming. One of them is the use of probiotic king catfish, in this study tested on catfish, tilapia and goldfish. This research is an experimental study. The design used in this study was a Completely Randomized Design with 4 treatments 3 replications. Data analysis used Statistical Package for the Social Sciences version 15. The results of the analysis of the highest seed survival rate were obtained on Pangasius pangasius (95%), on Oreochromis niloticus (83,33 %), and Cyprinus carpio (80%). The treatment of Rajalele probiotics has a very significant effect (very significant) Fanalysis (23.01) > Ftable 0.01 (7.59) on the graduation of Pangasius pangasius, Oreochromis niloticus, and Cyprinus carpio. The conclusion of this study shows that the survival rate the highest in Pangasius pangasius

scholarly journals Cross-amplification of heterologous microsatellite markers in Piracanjuba

2017 ◽  
Vol 47 (12) ◽  
Author(s):  
Pedro Luiz de Castro ◽  
Ricardo Pereira Ribeiro ◽  
Silvio Carlos Alves dos Santos ◽  
Elenice Souza dos Reis Goes ◽  
Felipe Pinheiro de Souza ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Microsatellite Markers ◽  
Oreochromis Niloticus ◽  
Genetic Parameters ◽  
Economic Value ◽  
Current Analysis ◽  
Genetic Studies ◽  
Colossoma Macropomum ◽  
Piaractus Mesopotamicus ◽  
Cross Amplification

ABSTRACT: Brycon orbignyanus, popularly known in Brazil as piracanjuba, is a fish with great economic value but whose natural population drastically decreased in number during the last years. In this context, genetic variability studies of natural stocks and in restocking programs are fundamental for the adoption of conservation measures. Current analysis verifies the cross-amplification of heterologous primers in B. orbignyanus. Fifty-two primers of the species Brycon opalinus, Brycon hilarii, Brycon insignis, Prochilodus sp., Piaractus mesopotamicus, Colossoma macropomum and Oreochromis niloticus were tested. Primers with the best reproducibility were applied to a sample of 20 individuals and the genetic parameters were calculated. Nine primers provided good results for cross-amplification with B. orbignyanus, involving (BoM5 and BoM13) of Brycon opalinus, (Bh5, Bh6, Bh8, Bh13 and Bh16) of Brycon hilarii, (Bc48-10) of Brycon insignis and (Par80) of Prochilodus argenteus. Primers of Piaractus mesopotamicus, Colossoma macropomum and Oreochromis niloticus failed to provide amplification or provided non-specificity. Results demonstrated the possibility of using primers of different species and genera of B. orbignyanus, facilitating genetic studies on the species.

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