scholarly journals Evaluación del crecimiento del Pejerrey Odontesthes bonariensis (Pisces, Atherinopsidae) cultivados en jaulas flotantes en el Lago Titicaca

2021 ◽  
Vol 23 (2) ◽  
pp. 69-76
Author(s):  
Glicerio Reyes Amaru Chambilla ◽  
◽  
Ernesto Yujra Flores ◽  
Keyword(s):  
Conversion Factor ◽  
Total Weight ◽  
Feed Conversion ◽  
Lake Titicaca ◽  
Total Length ◽  
Odontesthes Bonariensis ◽  
The City

The pejerrey, is a species introduced to Lake Titicaca from the continental waters of Argentina. The study was carried out at the Titicaca Trout Fishing Company, located in front of the city of Pomata, Puno Region, at an altitude of 3882 msnm. The objective of this study was to evaluate the growth of Odontesthes bonariensis from two batches (A and B) grown in Titicaca, Peru, in floating cages developed in 2018 and 2019. Silverside juveniles of 77.9 mm in length were used. average 120 days old, sowing a total of 8500 individuals (batch A = 5300 and batch B = 3200), from artificial spawning of broodstock confined in floating cages. After 360 days in batch A, a maximum total length of 230.0 ± 2.10 mm was achieved, total weight 80.0 ± 1.73 g, the feed conversion was found at 1.7 ± 1.39. In batch B, a maximum total length of 231.7 mm ± 2.70 was obtained, total weight 83.07 ± 1.67 g and the feed conversion factor was found at 1.3 ± 0.67. The feed used was commercial trout feed. It is concluded that the trials of silverside growth in floating cages in Lake Titicaca (Peru), presented encouraging results, showing that the fish tolerates the type of culture and could become an alternative for the development of aquaculture in the region.

scholarly journals Age, growth and mortality of Sciaena umbra (Sciaenidae) in the Gulf of Tunis

2018 ◽  
Vol 82 (1) ◽  
pp. 17 ◽  
Author(s):  
Inès Chater ◽  
Ahlem Romdhani-Dhahri ◽  
Jean Louis Dufour ◽  
Kélig Mahé ◽  
Nadia Chakroun-Marzouk
Keyword(s):  
Cross Sections ◽  
Growth Function ◽  
Growth Increment ◽  
Total Weight ◽  
Marginal Analysis ◽  
Positive Allometry ◽  
Total Length ◽  
Gulf Of Tunis ◽  
Von Bertalanffy Growth Function ◽  
Log Linear

The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p < 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for females. The fit of the von Bertalanffy growth function was significantly different between sexes (p

scholarly journals L’INFLUENCE DE L’ALIMENTATION SUR LE DÉVELOPPEMENT DES GONADES ET ANALYSE MORPHOLOGIQUE DE LA MATURATION DU Hyphessobrycon callistus ET DU Trichogaster trichopterus (PISCES, TELEOSTEI)

1998 ◽  
Vol 3 (1) ◽  
Author(s):  
MARIA CECÍLIA BERNARDES PADILHA TRIPPIA
Keyword(s):  
Fresh Water ◽  
Gonadal Development ◽  
Total Weight ◽  
Gonadal Maturation ◽  
Multiple Spawning ◽  
Total Length ◽  
Maturity Stages ◽  
Analyse Morphologique

Foi realizado estudo do comprimento total, peso total e peso das gônadas; dos índices gonadais; da distribuição do diâmetro ovocitário em ovócitos dissociados, assim como de seus maiores diâmetros por exemplar; e dos estádios de maturidade encontrados nos ovários e testículos, em relação à quantidade de alimento ofertado em três diferentes tratamentos de cada experimento, com Hyphessobrycon callistus e com Trichogaster trichopterus (Peixes, Teleostei). O comprimento total e o peso revelaram a tendência de serem diretamente proporcionais à quantidade de alimento ofertado em ambas as espécies, assim como o peso das gônadas em T. trichopterus. Em H. callistus o maior diâmetro ovocitário foi observado no tratamento de menor oferta alimentar, sendo que o maior diâmetro ovocitário de T. trichopterus refere-se ao tratamento de maior oferta alimentar. Em T. trichopterus as fases de desenvolvimento ovocitário encontradas e as escalas de maturidade de ovários e testículos propostas, foram semelhantes às observadas na literatura para outras espécies de Teleósteos dulceaqüícolas. Foi estimada a existência de desova múltipla em ambas as espécies. A maturação gonadal foi menos intensa no tratamento de menor oferta alimentar de T. trichopterus. Abstract Studies on the Hyphessobrycon callistus and Trichogaster trichopterus (Pisces, Teleostei) gonadal development in regard to nourishment were carried out. The following parameters were studied: the total length, total weight and gonads weight; the gonads indexes; the distribution of the oocytary diameter in oocytes dissociated and the maturity stages of ovaries and testicles. The total length and weight were estimated to be directly proportional to the amount of nourishment offered in both species, as well as the gonads weight of T.trichopterus. In H. callistus the largest oocytary diameter was observed in the treatment of the lowest level of nourishment offered, and the largest oocytary diameter of T. trichopterus was observed in the treatment of the highest level of nourishment offered. In T. trichopterus the development oocytary phases and the scales of ovaries and testicles maturity proposed were similar to the ones observed in the literature for other species of fresh water Teleosts. The existence of multiple spawning in both species was estimated. The gonadal maturation was less intense in the treatment of the lowest level of nourishment offered, in T. trichopterus.

scholarly journals Co-infestation of gills by different parasite groups in the mullet, Mugil platanus Günther, 1880 (Osteichthyes, Mugilidae): effects on relative condition factor

2004 ◽  
Vol 64 (3b) ◽  
pp. 677-682 ◽  
Author(s):  
M. J. T. Ranzani-Paiva ◽  
A. T. Silva-Souza
Keyword(s):  
Condition Factor ◽  
Sao Paulo ◽  
The Other ◽  
Total Weight ◽  
Paulo State ◽  
Total Length ◽  
Relative Condition Factor ◽  
Length Relationship ◽  
Gill Parasites ◽  
Estuarine Region

This study involved 334 specimens of mullet, Mugil platanus, captured monthly in the estuarine region of Cananéia, São Paulo State, Brazil, from July 1988 to June 1989, and examined for the presence of gill parasites. Parasitological inspections revealed the occurrence of the following groups: Trichodina sp., Monogenoidea, Copepoda, and Hirudinea. Only four mullets were not parasitized. Total weight and total length of all 334 mullet specimens examined were used for adjusting the weight-length relationship curve and calculating the relative condition factor (Kn). The 118 specimens infested with monogenoideans on average had lower weights than expected (Kn < 1.0), and the 81 fish co-infested with Copepoda, Monogenoidea, and Trichodina sp. showed a Kn < 1.0. The other infested and non-infested mullets had a Kn > 1.0. It was possible to infer that gill infestation with monogenoideans alters mullet weight, especially in the presence of co-infestation with Trichodina sp. and copepods.

Validation of the use of thin-sectioned Otoliths for determining the age and growth of Golden Perch, Macquaria ambigua (Perciformes: Percichthyidae), in the Lower Murray-Darling Basin, Australia

1992 ◽  
Vol 43 (5) ◽  
pp. 1103 ◽  
Author(s):  
JR Anderson ◽  
AK Morison ◽  
DJ Ray
Keyword(s):  
Growth Rates ◽  
Total Weight ◽  
Birth Date ◽  
Fish Length ◽  
Thin Sections ◽  
Continuous Growth ◽  
Total Length ◽  
Murray Darling Basin ◽  
The Mean ◽  
Age Estimates

Golden perch, Macquaria ambigua, from the Murray-Darling Basin were aged by using transverse thin sections of their sagittal otoliths. Samples from 889 fish were obtained from riverine and lacustrine habitats and from wild and stocked populations. Error in the precision of age estimates (calculated as the mean percentage error of the independent age estimates of four readers) was 5.6% (3.9% after allowing for discrepancies in relation to the annual mark on the edge of the otolith). Validation was accomplished by using a combination of analysis of the progression of modes in length-frequency distributions, qualitative and quantitative marginal-increment analysis, and analysis of age estimates of fish from populations with a known stocking history. The technique was validated for fish up to 8 years of age (455-545 mm total length, 1695-3988 g total weight), and the greatest recorded age was 16 years (530-600 mm total length, 2607-4050 g total weight). Annual marks become visible in otolith sections in most fish of all ages in October, and 1 October was designated as the birth date. A description of our method of reading sections of golden perch otoliths, including recognition of false annual marks, is given. Otolith length, width and thickness increased linearly with fish length and with loglo(fish age), whereas otolith weight increased linearly with fish age and exponentially with fish length. The continuous growth of the otoliths and the consistency in the appearance of annual marks support the accuracy of estimates up to the maximum recorded age. The mean length-at-age and the parameters of the length-weight relationship were estimated. The von Bertalanffy growth parameters were also estimated (L∞ =507 mm, to=0.420 years, K=0.454). No significant differences were found in growth rates or length-weight relationships between males and females. However, growth (particularly in weight) was highly variable among sites and years, and slow-growing 5-year-olds may be shorter than fastgrowing 1-year-olds. Ages were estimated for a sample of 86 golden perch caught between 1949 and 1951 but a comparison of growth rates between these and more recent collections was inconclusive.

scholarly journals PERFORMA PERTUMBUHAN, KOEFISIEN VARIASI, DAN HETEROSIS HASIL PERSILANGAN IKAN PATIN (Pangasius sp.) PADA TAHAP PENDEDERAN II

2017 ◽  
Vol 12 (1) ◽  
pp. 21
Author(s):  
Jadmiko Darmawan ◽  
Evi Tahapari
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Coefficient Of Variation ◽  
Fish Farming ◽  
Feed Conversion ◽  
Farmed Fish ◽  
Pangasianodon Hypophthalmus ◽  
Total Length ◽  
Final Weight ◽  
Striped Catfish

Hibridisasi merupakan salah satu teknik pemuliaan ikan dalam rangka mendapatkan varietas unggul sehingga mampu meningkatkan nilai produksi suatu komoditas ikan yang dibudidayakan. Tujuan penelitian ini adalah untuk mengevaluasi performa pertumbuhan, koefisien variasi, dan nilai heterosis dari hasil persilangan tiga spesies ikan patin sebagai tetua, yaitu patin siam (Pangasianodon hypophthalmus), patin jambal (Pangasius djambal), dan patin nasutus (Pangasius nasutus) pada tahap pendederan II. Induk ikan patin siam dan patin jambal yang digunakan merupakan ikan yang sudah dirilis sebagai ikan budidaya, sedangkan induk ikan patin nasutus berasal dari perairan umum dan sedang dalam proses domestikasi sebagai ikan budidaya. Persilangan yang dibuat adalah: A) f  patin jambal >< m  patin jambal (JJ); B) f  patin siam >< m  patin jambal (SJ); C) f  patin siam >< m   patin siam (SS); D) f  patin siam >< m  patin nasutus (SN); dan E) f   patin nasutus >< m  patin nasutus (NN). Penelitian dilakukan secara indoor hatchery selama 30 hari pemeliharaan. Nilai heterosis dihitung berdasarkan laju pertumbuhan spesifik (LPS) bobot, LPS panjang total, dan sintasan. Hasil penelitian menunjukkan bahwa performa pertumbuhan, sintasan, dan konversi pakan ikan hasil persilangan tidak berbeda nyata (P>0,05). Ikan patin SN memiliki performa yang lebih baik dari tetuanya dengan nilai heterosis bobot akhir, LPS bobot, panjang total, LPS panjang total, dan sintasan berturut-turut sebesar 110,87%; 19,78%; 36,14%, 36,09%; dan 15,04%; serta nilai koefisien variasi berkisar antara 0,00-11,08. Bobot akhir, panjang total dan sintasan ikan patin SJ juga lebih baik dari tetuanya dengan nilai heterosis berturut-turut sebesar 46,00%; 11,27%; dan 2,27%; namun untuk heterosis LPS bobot dan LPS panjang total bernilai negatif (-6,65% dan -1,01%), serta nilai koefisien variasi berkisar antara 0,00-12,75. Berdasarkan hasil penelitian tersebut menunjukkan bahwa ikan patin hibrida SN berpotensi sebagai ikan budidaya dalam rangka peningkatan produksi ikan patin daging putih selain dari ikan patin hibrida  SJ (pasupati) yang telah dirilis ke masyarakat.Hybridization is a fish breeding technique in order to obtain high yielding varieties as to increase the production value of a farmed fish. The purpose of this study was to evaluate the growth performance, the coefficient of variation and heterosis value of the result of crossing three species of catfish as a parent, which was striped catfish (Pangasianodon hypophthalmus), jambal catfish (Pangasius djambal) and nasutus catfish (Pangasius nasutus). Crosses made were A) f jambal catfish >< m  jambal catfish (JJ); B) f striped catfish >< m  jambal catfish (SJ); C) f striped catfish >< m  striped catfish (SS); D) f striped catfish >< m  nasutus catfish (SN); and E) f nasutus catfish >< m   nasutus catfish (NN). The study was performed at the indoor hatchery for 30 days. Heterosis values were calculated based on the specific growth rate (SGR) final weight, SGR total length, and survival rate. The results showed that growth performance, survival rate, and feed conversion were not significantly different (P>0.05). Catfish SN has a better performance than the parent with the value of heterosis at final weight, SGR weight, total length, SGR total length, and survival rate of 110.87%, 19.78%, 36.14%, 36.09%, and 15.04%, respectively. The coefficient of variation ranged from 0.00 to 11.08. Final weight, total length, and survival of catfish SJ were also better than the parent with the heterosis value of 46.00%, 11.27%, and 2.27% respectively, but for heterosis SGR of the weight and the total length were negative (-6.65% and -1.01%) and the coefficient of variation ranged from 0.00 to 12.75. These results indicated that the hybrid catfish SN has a great potential as fish farming in the hope of increasing the production of white meat catfish hybrid apart from SJ (Pasupati) that have been released to the public.

scholarly journals A New Maximum Size Record of the Shi Drum (Umbrina cirrosa Linnaeus, 1758) for Aegean Sea

2020 ◽  
Author(s):  
Ö. Cengiz ◽  
Ş. Ş. Paruğ
Keyword(s):  
Aegean Sea ◽  
Maximum Size ◽  
September 11 ◽  
Maximum Length ◽  
Total Weight ◽  
Single Specimen ◽  
Total Length ◽  
New Findings ◽  
The World ◽  
Northern Aegean Sea

Abstract The present study has been conducted to find out new findings on maximum length and weight values of Umbrina cirrosa in the Bay of Saros (Northern Aegean Sea, Turkey). On September, 11, 2016, a single specimen of Umbrina cirrosa with 68.8 cm total length and 2600.00 g total weight was caught by handline at a depth of 20 m. The provable size is the second largest length ever reported in the all seas of the world

scholarly journals Charakterystyka kandydatów na studia z turystyki i rekreacji na Uniwersytecie Pedagogicznym w Krakowie

2010 ◽  
Vol 15 ◽  
pp. 286-298
Author(s):  
Roman Malarz
Keyword(s):  
Secondary School ◽  
Rural Areas ◽  
Rural Population ◽  
Conversion Factor ◽  
Great Majority ◽  
First Year ◽  
Prospective Students ◽  
National Scale ◽  
Advanced Level ◽  
The City

In year 2009, Institute of Geography of the Pedagogical University of Cracow created a new course of study, i.e. Tourism and Recreation. A record breaking number of 1022 prospective students applied for enrolment for the first year of study. A great majority of candidates came from the Małopolskie voivodship and the city of Cracow (the total of 65.1%). A significant number of applicants came also from the neighbouring provinces, i.e. Podkarpackie (11.4%), Śląskie (10.1%) and Świętokrzyskie (5.0%). Over 35% of candidates came from rural areas, which constitutes a fairly high percentage value on the national scale, due to the fact that the Małopolskie, Podkarpackie, and Świętokrzyskie voivodships constitute territorial units where rural residents are outnumbered by rural population. Admission was based on applicants’ results obtained in the secondary-school-leaving exam. The recruitment committee calculated the average of grades obtained from all exams, applying 1.5 conversion factor to advance level exams, and 1.5 and 2 conversion factor to the basic and advanced level exam in geography, respectively. Consequently, the highest-scoring applicants exceeded the value of 100%. The highest score was achieved by a candidate from Węgierska Górka (143.83%). The applicant with the lowest score came from Cracow (41.33%). The average grade obtained from the secondary-school leaving exam for all applicants equalled 76%. The majority of candidates were women (72.7%), who also “improved” their results and constituted 80% of students admitted to the first year of study.

scholarly journals KOMPOSISI MAKANAN IKAN SEPAT SIAM (Trichopodus pectoralis Regan, 1910) DI DANAU TALIWANG, SUMBAWA

2015 ◽  
Vol 6 (1) ◽  
pp. 41
Author(s):  
Prawira ARP Tampubolon ◽  
M.F. Rahardjo
Keyword(s):  
Body Size ◽  
Diet Composition ◽  
Sampling Time ◽  
Total Weight ◽  
Target Species ◽  
Total Length ◽  
Fish Samples

Ikan sepat siam (Trichopodus pectoralis, Regan 1910) merupakan salah satu target penangkapan ikan di Danau Taliwang, Sumbawa. Penelitian ini bertujuan untukmendeskripsikan komposisi makanan ikan sepat siam di Danau Taliwang. Pengambilan contoh ikan dilakukan pada bulanMei–Juli 2010 menggunakan jaring insang. Analisis komponen makanan menggunakan indeks bagian terbesar. Total ikan contoh yang tertangkap selama penelitian sebanyak 110 ekor yang terdiri atas 59 ekor ikan jantan dan 51 ekor ikan betina. Panjang total ikan yang tertangkap berkisar antara 125–196 mm dan bobot antara 26,7–141,7 gram. Makanan ikan sepat terdiri atas mikroalga, Rotifera, Ostracoda dan serangga dengan makanan utama adalah mikroalga dari Kelas Bacillariophyceae (generaMelosira,Navicula, dan Diatoma).Komposisimakanan berdasarkan bulan pengamatan dan ukuran tubuh relatif sama.Snakeskin gouramy (Trichopodus pectoralis, Regan 1910) is a one of many target species of fish caught in Taliwang Lake, Sumbawa. The objective of this study is to describe the diet composition of snakeskin gouramy found in Taliwang Lake. The fish samples were caught using gillnet during May–July 2010. The diet composition was analyzed by using the index of preponderance. The total number of fish caught during the research was 110 fishes, comprising 59 males and 51 females. The range of total length and total weight of the samples were 125–196 mm and 26.7–141.7 grams, respectively. Snakeskin gouramy in Taliwang Lake mainly feed on Microalgae, Rotifer, Ostracod, and insect. Their main diet, however, is Microalgae from the class of Bacillariophyceae (genera of Melosira, Navicula, and Diatoma). The diet composition of the fish which was determined from the sampling time and body size is relatively the same.

scholarly journals Kültür Koşullarında Astacus leptodactylus (Eschscholtz, 1823)'un Yumurta Verimliliğinin Belirlenmesi

2019 ◽  
Vol 7 (4) ◽  
pp. 646
Author(s):  
Gülşen Uzun Gören ◽  
Sedat Karayücel ◽  
Birol Baki
Keyword(s):  
Negative Relationship ◽  
Live Weight ◽  
Strong Relationship ◽  
Culture Conditions ◽  
Total Weight ◽  
Astacus Leptodactylus ◽  
Total Length ◽  
The Mean ◽  
Egg Diameter ◽  
The Relationship

In this study, it was aimed to determine there and fecundity by adapting crayfish (Astacus leptodactylus) obtained from Bafra Fish Lakes (Ulugöl-Samsun) in culture conditions. Crayfish obtained in November 2016 were stocked in tanks and egg and morphometric characteristics of female crayfish with carrying eggs were determined. Correlation analysis were used for the relationship between the determined parameters. The mean total weight and total length of crayfish were 41.79±3.00g, 10.72±0.22cm, respectively whereas the mean number and diameter of eggs were 156.40±33.24 and 2.50±0.12mm. There were positive strong relationship between total length and total weight of crayfish negative relationship was found between egg diameter and total number of eggs, egg diameter and total weight of eggs and egg diameter and number of eggs for per unit of live weight.

scholarly journals Effect of Different Levels of Local Concentrated Protein Manufactured from Slaughterhouse Wastes on some productive Traits of Broiler

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Zaman K.F. Al-Mhsenawi ◽  
Majid H.A. Alasadi ◽  
Qutiba J.G. Al khfaji
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Broiler Chickens ◽  
Consumption Rate ◽  
Conversion Factor ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Synthetic Protein ◽  
Live Body Weight ◽  
Productive Traits

"The current study was conducted to find out the effect of using locally manufactured protein concentrate on some productive traits of broilers (weekly body weight rate, weekly weight gain rate, weekly feed consumption rate, food conversion factor) used in the experiment 225 broiler chickens (female) of the age of one day (breed Ross-308) Chicks were distributed randomly into five treatments, with three replications (15 chicks / replicate). The trial parameters were as follows: The first treatment (control T1) provided for the chicks with a diet containing 4% imported protein, the second treatment (T2) for the chicks with a diet containing 2% imported protein + 2% manufactured protein, the third treatment (T3) provided for the chicks with a diet The fourth treatment contains 4% synthetic protein, the fourth treatment (T4) is provided for the chicks with a diet containing 6% manufactured protein and the fifth treatment (T5) using a diet containing 8% manufactured protein. The results showed the absence of significant differences between the trial parameters in all the studied traits, which included live body weight, weight gain, feed consumption rate and feed conversion factor."

Sign in / Sign up

Export Citation Format

Share Document