scholarly journals Population structure and somatic indexes of Hypostomus cf. ancistroides (Siluriformes, Loricariidae) collected from the Bonito river, Ivaí river basin, Turvo, Paraná

2008 ◽  
Vol 51 (3) ◽  
pp. 493-502 ◽  
Author(s):  
Douglas Viana ◽  
Luciano Lazzarini Wollf ◽  
Tânia Zaleski ◽  
Silvia Romão ◽  
Gustavo Bertoldi ◽  
...  
Keyword(s):  
Population Structure ◽  
River Basin ◽  
Structure Analysis ◽  
Condition Factor ◽  
Gonad Weight ◽  
Weight Relationship ◽  
Gonad Somatic Index ◽  
Reproduction Period ◽  
Liver Somatic Index ◽  
Somatic Index

This study aimed to provide information about the population structure and somatic index of Hypostomus cf. ancistroides collected from the Bonito river, located in the Ivaí river basin. The length-weight relationship was isometric for both the sexes. The length structure analysis showed that the larger individuals (from 18.1cm to 27.0cm in length) predominated, and the lowest abundances occurred at the size extremes (9.1-12cm and 27.1-30.0cm). The reproduction period occured between October and January for the females and between November and January for the males. The liver somatic index cannot be used as an indicator of the reproduction period in either of the sexes, due to no correlation between the liver somatic index and the gonad somatic index. The gonad weight exerted no influence on the monthly mean condition factor and the correlation between the condition factor and gonad somatic index was high. The condition factor could be an indicator of the reproduction period of this species.

scholarly journals Condition factor of Goniopsis cruentata (Crustacea, Brachyura, Grapsidae) from Mundaú/Manguaba estuarine complex, Alagoas, Brazil

2012 ◽  
Vol 102 (3) ◽  
pp. 285-291 ◽  
Author(s):  
José J. P. R. Lira ◽  
Tereza C. S. Calado ◽  
Marina S. L. C. Araújo
Keyword(s):  
Condition Factor ◽  
Well Being ◽  
Northeast Brazil ◽  
Gonad Weight ◽  
Weight Relationship ◽  
Autumn And Winter ◽  
General Indicator

The condition factor is a parameter which acts as a general indicator of the "well-being" of a species, and it can be obtained through the analysis of width vs. weight relationships. The present work aims to investigate size vs. weight relationship and the condition factor of the crab Goniopsis cruentata (Latreille, 1803). The study area was the Mundaú/Manguaba estuarine complex, Maceió, state of Alagoas, Northeast Brazil. Samplings were monthly accomplished from August 2007 to July 2008. A total of 626 individuals were analyzed, being 309 males and 317 females. Males were larger and heavier than females, what is expected in many brachyuran. The growth was positive allometric to both males (b = 3.42) and females (b = 3.30), not obeying the "cube law". The condition factor of female was higher than that of male crabs, probably due to the gonad weight of females. It also varied seasonally for both sexes, being higher in the autumn and winter in males, and in the autumn and spring in females, and related to the molt and period of spawning intensification.

scholarly journals Population structure, growth and fishery yield of Leporinus acutidens (Valenciennes, 1837) (Teleostei: Anostomidae) in Yacyretá Reservoir (Argentina)

2008 ◽  
Vol 6 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Patricia R. Araya ◽  
Angelo A. Agostinho ◽  
José A. Bechara
Keyword(s):  
Population Structure ◽  
Condition Factor ◽  
Growth Ring ◽  
Sampling Site ◽  
Total Mortality ◽  
Late Summer ◽  
Maximum Sustainable Yield ◽  
Weight Relationship ◽  
Filling Phase ◽  
Population Structure And Dynamics

The population structure and dynamics of Leporinus acutidens (Valenciennes, 1837), upstream from Yacyretá Dam (Upper Paraná River, Argentina) were analyzed for their relation to age, condition factor, growth, mortality and fishery yield. The pre- (1990-94) and post- (1995-98) filling phases of the reservoir were compared with regard to age structure, condition factor, and the length/weight relationship of fish. Fish sampling was carried out at four sampling sites following a longitudinal gradient along the river. The catches took place monthly using eight monofilament gillnets (mesh 40 to 160 mm). The growth marks on the scales were annual (9-year maximum). The study of the variation in the monthly averages of the scale marginal increments revealed that the period of the growth ring formation shifted from winter to spring in the post-filling phase. The length/weight relationship coefficient (b) was higher after dam closing. The condition factor increased before the reproduction period and during late summer, reaching maximum values in the post-filling phase, and especially at the sampling site placed within the reservoir region. The von Bertalanffy growth coefficient k for both sexes was 0.16, and the asymptotic length L" reached 338 mm. Natural mortality during the whole study period, according to Pauly's equation, was 0.25 years -1 and total mortality was 0.37 years -1. The Beverton-Holt yield per recruit (Y/R) model attained 57.23 g, with a maximum sustainable yield (MSY) of 70.75 g. Low total mortality was associated with the lack of commercial exploitation of the species.

scholarly journals Analisis Konsentrasi Limbah Rumah Pemotongan Unggas (RPU) terhadap Pertumbuhan dan Indeks Fisiologi Ikan Nila (Oreochromis niloticus) Skala Laboratorium Concentration of Poultry Slaughterhouse Waste on Growth and Physiology Index of Tilapia (Oreochromis niloticus) in Laboratory Scale

2020 ◽  
Vol 9 (1) ◽  
pp. 8-14
Author(s):  
Prasasti Anugrahini Dewi ◽  
Siti Rudiyanti ◽  
Wiwiet Teguh Taufani
Keyword(s):  
Oreochromis Niloticus ◽  
Design Pattern ◽  
Condition Factor ◽  
Average Weight ◽  
Physiological Index ◽  
Weight Growth ◽  
Gonad Somatic Index ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Somatic Index

ABSTRAKPertumbuhan ikan tergantung dari kondisi perairan tempat hidupnya. Limbah dari aktivitas pemotongan unggas yang dibuang berpotensi mencemari perairan. Penelitian ini bertujuan untuk mengetahui pengaruh limbah Rumah Pemotongan Unggas (RPU) terhadap pertumbuhan dan indeks fisiologi Ikan Nila (Oreochromis niloticus). Penelitian dilaksanakan pada bulan November 2018 – Januari 2019. Penelitian menggunakan metode eksperimen dengan pola Rancangan Acak Lengkap (RAL). Air limbah RPU diambil di rumah pemotongan ayam Tembalang. Teknik pengambilan data dilakukan dengan cara observasi langsung. Rancangan percobaan penelitian ini menggunakan Ikan Nila dengan bobot 2 – 3 gr, diuji selama 28 hari menggunakan konsentrasi limbah berturut-turut 0% v/v, 10% v/v, 20% v/v, 30% v/v, dan 40% v/v dari nilai LC50 – 96 Jam sebesar 129,865 ml/. Parameter yang dianalisis meliputi pertumbuhan biomassa mutlak, indeks fisiologi, dan kualitas air yang terdiri dari DO, pH, dan temperatur. Hasil pengujian limbah RPU terhadap pertumbuhan Ikan Nila menunjukkan rata-rata pertumbuhan berat ikan tertinggi ada pada konsentrasi D (12,986 ml/l), yaitu 4,71 gram, dan pertumbuhan terendah pada konsentrasi A (51,946 ml/l), yaitu 1,51 gram. Hasil pengujian limbah RPU terhadap CF (Condition Factor) yaitu 0 ml/l adalah 3,10; 51,946 ml/l adalah 3,88; 38,959 ml/l adalah 4,02; 25,973 ml/l adalah 2,84; dan 12,986 ml/l adalah 3,09. Hasil LSI berturut-turut yaitu 0 ml/l rata-adalah 1,20; 51,946 ml/l adalah 3,65; 38,959 ml/l adalah 3,06; 25,973 ml/l adalah 2,07; dan 12,986 ml/l adalah 1,41. Hasil GSI (Gonad Somatic Index) berturut-turut yaitu 0 ml/l adalah 0,50 ; 51,946 ml/l adalah 0,20 ; 38,959 ml/l adalah 0,35; 25,973 ml/l adalah 0,35; dan 12,986 ml/l adalah 0,42. ABSTRACTFish's growth depends on the water condition of their habitat. Waste in the form of slaughtered poultry slaughtering activities has the potential to pollute the waters. This study aims to determine the effect of Poultry Slaughterhouse Waste on the growth and physiological index of Tilapia (Oreochromis niloticus). The study was conducted in November 2018 - January 2019. The method used was an experimental method with a completely randomized design pattern. Slaughterhouse waste water is taken at Tembalang chicken slaughterhouses. The data collection method uses direct observation. The experimental design of this study was using Tilapia with a weight of 2-3 grams, tested for 28 days using concentrations of waste respectively 0% v/v, 10% v/v, 20% v/v, 30% v/v, and 40% v/v of the LC50 - 96 Hours value of 129,865 ml / L. Parameters analyzed included absolute biomass growth, physiological index, and water quality consisting of DO, pH, and temperature. The results of slaughterhouse waste testing on the growth of Tilapia showed that the highest average weight growth of fish was at concentration D (12,986 ml / l), which was 4,71 gram, and the lowest growth was at concentration A (51,946 ml / l), which was 1,51 gram. The results of slaughterhouse's waste testing on CF (Condition Factor) that is 0 ml / l are 3,10; 51,946 ml / l is 3,88; 38,959 ml / l is 4,02; 25,973 ml / l is 2,84; and 12,986 ml / l is 3,09. The consecutive LSI results, ie 0 ml / l, were 1.20; 51,946 ml / l is 3.65; 38,959 ml / l is 3.06; 25,973 ml / l is 2.07; and 12,986 ml / l is 1.41. The result of GSI (Gonad Somatic Index) in a row that is 0 ml / l is 0.50; 51,946 ml / l is 0.20; 38,959 ml / l is 0.35; 25,973 ml / l is 0.35; and 12,986 ml / l is 0.42.

scholarly journals The Length-Weight, Length-Length Relationship and Condition Factor of Angora Loach, Oxynoemacheilus angorae (Steindachner, 1897) Inhabiting Kılıçözü Stream in Kızılırmak River Basin (Central Anatolia-Turkey)

2016 ◽  
Vol 4 (12) ◽  
pp. 1165 ◽  
Author(s):  
Okan Yazıcıoğlu ◽  
Ramazan Yazıcı
Keyword(s):  
River Basin ◽  
Condition Factor ◽  
Central Anatolia ◽  
Weight Relationship ◽  
Length Relationship

In this study, length-weight relationship (LWR), length- length relationship (LLR) and condition factor (K) of Angora loach, Oxynoemacheilus angorae were determined. A total of 103 specimens were sampled from Kılıçözü Stream in 2014. The length and weight of specimens were ranged 3.5-9.8 cm and 0.38-6.58 g, respectively. Length-weight relationships for female, male and all samples were found as W= 0.01056.TL2.896 (r²= 0.923), W= 0.00963.TL2.940 (r²= 0.978) and W= 0.00987.TL2.929 (r²= 0.963), respectively. LWRs indicated an isometric growth in female, male and all samples. The values of Fulton’s condition factor (K) ranged from 0.699 to 1.246 for females and from 0.654 to 1.072 for males. All length-length relationships were statistically significant.

scholarly journals Gonad maturity level and somatic index of sea cucumber Acaudina sp. (caudinidae, molpadida, holothuroidea) In Delta Wulan Waters, Demak Regency, Indonesia

2021 ◽  
Vol 919 (1) ◽  
pp. 012006
Author(s):  
W Widianingsih ◽  
R Hartati ◽  
M T Sibero ◽  
R T Mahendrajaya
Keyword(s):  
Sea Cucumber ◽  
Maturity Level ◽  
Gonad Weight ◽  
Gonad Maturity ◽  
Positive Correlation ◽  
Gonad Somatic Index ◽  
The Family ◽  
Level 3 ◽  
Level 2 ◽  
Somatic Index

Abstract Sea cucumber Acaudina sp. belongs to the family Caudinidae, Order Molpadida, Class Holothuroidea. These animals have an important role in the benthic ecosystem. The purpose of this research was to determine the gonad maturity level and Gonad Somatic Index of Acaudina sp. in Delta Wulan Waters, Demak Regency. In total, 64 individuals of Acaudina sp. were taken in April 2021 and 148 individuals were taken in May 2021. In April observation, the highest gonad maturity level for females was at level 3, while the highest gonad maturity for male was at levels 1 and 2. Furthermore, in Mei observations, the highest gonad maturity level for females was at level 2 and for males, the highest gonad maturity level was at level 3. According to April observation, values GSI (Gonad Somatic Index) has a range 0.22 - 6.09 % and for May observation, value GSI has a range 0.04 – 2.24%. Hence, there is a positive correlation between gonad weight and GSI values in sea cucumber Acaudina sp.

scholarly journals Reproduction De Heterotis Niloticus (Cuvier, 1829) De La Riviere Agneby (Cote d’Ivoire)

2016 ◽  
Vol 12 (6) ◽  
pp. 83 ◽  
Author(s):  
Kouakou Fokouo Kessia Irène ◽  
Koné Tiéhoua ◽  
Soro Yaya ◽  
N’Da Konan ◽  
Ouattara Mamadou
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Standard Length ◽  
Sexual Maturity ◽  
Condition Factor ◽  
Artisanal Fishing ◽  
Relative Fecundity ◽  
Maturation Stages ◽  
Liver Somatic Index ◽  
Somatic Index

The reproductive biology of Heterotis niloticus has been studied from monthly samples taken from artisanal fishing on the Agneby river during the period june 2013 to May 2015. The whole sample consisted of 498 specimens of which 269 females and 229 males were examined. Sex-ratio observed was in favour of females (1: 1.17; X2 = 3.21; p > 0.05). The monthly evolution of the gonado-somatic index (GSI), the liver-somatic index (LSI), the condition factor (K) and maturation stages suggests that this fish has two periods of reproduction. The two periods were respectively from june to august and from november to december. The standard length at first sexual maturity was 490.6 mm for females and 436.3 mm for males. The absolute fecundity was ranged from 5424 to 25591 oocytes in females of 595 mm to 780 mm standard length. The relative fecundity was 3752± 1491 oocytes/kg of female.

scholarly journals HUBUNGAN PANJANG DAN BERAT, FAKTOR KONDISI , FEKUNDITAS, DAN PERKEMBANGAN TELUR IKAN TENGADAK (Barbonymus schwanenfeldii) DARI SAROLANGUN, JAMBI DAN ANJONGAN, KALIMANTAN BARAT, INDONESIA

2018 ◽  
Vol 17 (2) ◽  
Author(s):  
Irin Iriana Kusmini ◽  
Jojo Subagja ◽  
Fera Permata Putri
Keyword(s):  
Condition Factor ◽  
Regression Coefficient ◽  
Fish Farming ◽  
Growth Patterns ◽  
Gonad Weight ◽  
Microsoft Excel ◽  
West Kalimantan ◽  
Weight Relationship ◽  
Group Data ◽  
Average Factor

Tinfoil barb (Barbonymus schwanenfeldii) is one of the potential local fish to be cultivated as a food or pet fish. The data and information of the growth pattern of species are essential for fish farming success. The observation on the length and weight relationship is an usefull indicator to determine the pattern of growth fish observed. This study aims to determine the growth patterns of tinfoil barb fish based on length and weight relationship, condition factor and fish fecundity of tinfoil barb from Sarolangun, Jambi and Anjongan, West Kalimantan. The 30 samples were taken randomly from each group. Data were analyzed using analysis regression Microsoft Excel. The result showed that the regression coefficient of length and weight relationship was 2.811 for Sarolangun and 2.686 for Anjongan. The regression value indicates that the the growth of tinfoil barb was allometric negative, with an average factor condition ranged from 0.99 to 1.002. Length and weight relationship had determinant value (R2) ranged from 0.79 to 0.96, with the fecundity ranged from 20168 to 232.040 eggs from 9–45.5g of gonad weight. 

scholarly journals Biologie De La Reproduction Du Sciaenidae Pseudotolithus Elongatus Dans La Lagune Ebrie (Cote d’Ivoire)

2016 ◽  
Vol 12 (6) ◽  
pp. 327
Author(s):  
Koné Tiéhoua ◽  
Kouakou Fokouo Kessia Irène ◽  
Konan Kouassi Sylvain ◽  
N’Da Konan
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Size Class ◽  
Breeding Period ◽  
Total Length ◽  
Mean Diameter ◽  
Liver Somatic Index ◽  
The Mean ◽  
First Maturity ◽  
Somatic Index

The study of reproduction of Pseudotolithus elongatus in the Ebrie lagoon was investigated between July 2013 and June 2015 on a whole of individuals of 550 specimens. the total length ranges from 14.5 to 42.7 cm. The monthly evolution of the gonado-somatic index (GSI), the liver-somatic index (LSI), the condition factor (K), the Sex-ratio, the fecundity, the diameter of eggs revealed that this species spawns throughout the year but the main breeding period was in raining season. Sex-ratio observed was in favour of females (1: 1. 14; X2 = 2.26; p > 0.05). The percentage of mature specimens by sexes was calculated for each size class. Total length at first maturity was 21.06 cm for females and 20.21cm for males. The ripe ovaries contained 39883-814757 eggs. The relative fecundity was 216-1979 eggs per g of body weight of females. And the mean diameter of eggs is 336 ±138 microns.

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