scholarly journals Occurrence of Neoechinorhynchus curemai (Acanthocephala: Neoechinorhynchidae) in Prochilodus nigricans (Characiformes: Prochilodontidae), in southwestern Amazon

2021 ◽  
Vol 43 ◽  
pp. e57163
Author(s):  
Lucena Rocha Virgilio ◽  
Fabricia da Silva Lima ◽  
Luciano Negreiros ◽  
Ricardo Massato Takemoto ◽  
Luís Marcelo Aranha Camargo ◽  
...  
Keyword(s):  
Condition Factor ◽  
Brazilian Amazon ◽  
B Value ◽  
Infected Fish ◽  
Parasite Intensity ◽  
Relative Condition Factor ◽  
Parasite Infestation ◽  
Intensity Condition ◽  
Fish Hosts ◽  
Three Rivers

Prochilodus nigricans is extensively exploited in fishing and aquaculture activities in the Brazilian Amazon, it is the definitive host for Neoechinorhynchus curemai Noronha, 1973. Thus, the present study aimed to evaluate the occurrence of N. curemai in P. nigricans and the parasite-host relationship in three rivers (Juruá, Crôa and Môa) in the municipality of Cruzeiro do Sul, state of Acre, Brazil. Fish were caught, weighed, measured, and subjected to necropsy, and the gastrointestinal tract and viscera were analyzed. A total of 178 specimens of N. curemai were found in 61 infected fish, with the (p= 58.62%). The prevalence, mean intensity, and mean abundance were higher in hosts from the Môa River, and lower from the Juruá River. Regarding the length-weight relationship, the b-value did not differ statistically from three (b=3) for fish species in the three locations, nor in parasitized and non-parasitized species. In addition, growth was considered isometric, and in the case of the relative condition factor, there was no difference in fish hosts between the three rivers. The correlation between parasite intensity, condition factor, length, and weight of P. nigricans was not significant. Thus, this parasite infestation varied between the habitats. However, this did not influence the growth and development of the hosts.

scholarly journals Parasitism of Cichlasoma paranaense Kullander, 1983 and Gymnotus carapo Linnaeus, 1814 by Clinostomum complanatum (Rudolphi, 1814) Metacercariae in the Taquari river

2005 ◽  
Vol 65 (3) ◽  
pp. 513-519 ◽  
Author(s):  
A. T. Silva-Souza ◽  
G. Ludwig
Keyword(s):  
Condition Factor ◽  
Infected Fish ◽  
Expected Value ◽  
Yellow Spot ◽  
Total Weight ◽  
Intensity Of Infection ◽  
Mean Intensity ◽  
Spot Disease ◽  
Relative Condition Factor ◽  
Clinostomum Complanatum

The infection, known as yellow spot disease, produced by metacercariae of Clinostomum spp. was studied in fishes of the Taquari river, located in Jataizinho, Paraná State, Brazil. A total of 1,582 specimens, belonging to 36 species, were collected between March 1999 and April 2001. Yellow spot disease was observed only in Gymnotus carapo Linnaeus, 1814 (Gymnotiformes, Gymnotidae) and Cichlasoma paranaense Kullander, 1983 (Perciformes, Cichlidae). This parasitism was generated by metacercariae of Clinostomum complanatum (Rudolphi, 1814) (Digenea, Clinostomidae). Among the 88 specimens of G. carapo examined, 7 (prevalence = 8%) had cysts of the parasite. Four of them were captured in July 1999 and three in October 1999. In the other months, no specimen found was infected. Using relative condition factor (Kn) analysis, it was determined that both infected and non-infected specimens had a total weight equal to the theoretically expected value for each total length (Kn = 1.0). Among 56 individuals of Cichlasoma paranaense, 6 (prevalence = 10.7%) had between 1 and 27 metacercariae of C. complanatum (mean intensity of infection = 9.3 ± 9.6). In March 1999 and April of both 2000 and 2001, the specimens examined were not infected. The infected fish had a total weight higher than the expected value (Kn > 1.0), while the non-infected fish had a weight equal to the expected value (Kn = 1.0).

scholarly journals Length-weight relationship and condition factor of Tade gray mullet, Chelon planiceps (Valenciennes, 1836) from Hooghly-Matlah Estuary, West Bengal, India

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Soumendra Pramanick ◽  
Sudhir Kumar Das ◽  
Dibakar Bhakta ◽  
Canciyal Johnson
Keyword(s):  
West Bengal ◽  
Condition Factor ◽  
B Value ◽  
Size Group ◽  
Estuarine System ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Biological Management ◽  
First Maturity ◽  
Size At First Maturity

Tade gray mullet (Chelon planiceps) forms a lucrative fishery in the Hooghly-Matlah estuarine system. During eight months of investigation 232 specimens were examined to study length-weight relationship and relative condition factor (Kn). The length and weight of fish was varied from 41 to 283 mm and 0.81 to 208 g respectively. Two length-weight relationship equations were obtained from the analysis, W=0.0000397L2.952 for <187 mm size group and W=0.0000406L2.834 for >187 mm size group. The size at first maturity was recorded as 187 mm. The b value was not significantly different from 3 indicating isometric growth. The monthly mean Kn for the male and female were 1.041–1.125 and 1.009–1.236 respectively. The highest Kn value was recorded in July for both the sexes, which may be due to advance maturity stages. The present study will be useful in the context of biological management of mullet fishery as well as to find out aqua-farming potential of Tade gray mullet.

scholarly journals Relative condition factor, length-weight relationship, and growth of three-spotted flounder, Pseudorhombus triocellatus from Parangipettai Coast, India

2019 ◽  
Vol 20 (2) ◽  
pp. 373-379
Author(s):  
PALANIVEL BHARADHIRAJAN ◽  
GOPALAN MAHADEVAN ◽  
PERUMAL MURUGESAN ◽  
SAMANTHAM MURUGAN ◽  
MOJTABA POULADI ◽  
...  
Keyword(s):  
Condition Factor ◽  
B Value ◽  
Limited Information ◽  
Growth Coefficient ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Basic Parameters ◽  
Males And Females ◽  
By Catch ◽  
Trawl Catches

Bharadhirajan P, Mahadevan G, Murugesan P, Murugan S, Pouladi M, Abbaspour Naderi R. 2019. Relative condition factor, length-weight relationship, and growth of three-spotted flounder, Pseudorhombus triocellatus (Bloch & Schneider, 1801) from Parangipettai Coast, India. Biodiversitas 20: 373-379. The three-spotted flounder, Pseudorhombus triocellatus is usually caught as trawl by-catch from Parangipettai coastal waters but regrettably, limited information on its age structure and growth is available. Hence, the present study aims to understand some basic parameters of its biology and growth. A total of 759 specimens (360 males and 399 females) ranging from 4 cm to 13 cm in total length (TL) and 5.26-35.41 g in weight were collected from the trawl catches of Parangipettai and Mudasalodai landing center during January–December 2015. The estimated growth coefficient (b) value for males (2.797) was greater than 3 and for females (3.023) was less than 3. The relative condition factor (Kn) values of females were higher than males except during February, June, and September. The values of asymptotic length (L∞) obtained in this study using various methods didn’t vary significantly (P>0.05). The most appropriate values of asymptotic length (Lα) for males were 137.11 mm and for females were 141.75 mm. The most appropriate values of growth rate (K) for males were 0.397 yr-1 and for females were 0.410 yr-1. The estimated length at age 0 (t0) for males and females were 0.197 mm and 0.292 mm, respectively. The longevity (tmax) of males and females P. triocellatus were 2.04 years and 2.24 years, respectively. The result of this study provides basic information for future studies.

scholarly journals Length-weight relationship and relative condition factor of the ribbon fish, Lepturacanthus savala (Cuvier, 1829) from the Bay of Bengal, Bangladesh

2013 ◽  
pp. 119-126
Author(s):  
Mohammad Ali Azadi ◽  
Mohammad Ullah
Keyword(s):  
Bay Of Bengal ◽  
Confidence Limit ◽  
Condition Factor ◽  
B Value ◽  
Length Frequency ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Relationship Of ◽  
Lepturacanthus Savala ◽  
The Ideal

Length-weight relationship of 1119 specimens of Lepturacanthus savala (Cuvier 1829) from the Bay of Bengal, Bangladesh, was found to be curvilinear (W= 0.0003612 TL3.18) and linear (LogW= -3.44+3.18 LogTL) for both the sexes combined in arithmetic and logarithmic scales, respectively. The values of regression co-efficient (b) ranged from 3.002 to 3.337 (? ± 0.167) at 95% confidence limit. The regression 'b' value (3.18) followed the cube law and did not significantly (P>0.05) differ from the cube. The growth of the fish was found to be isometric. Relative condition factor (Kn) was also within the ideal range (0.9695 to 1.1155, mean 1.001± 0.033). Seasonal or in different length groups no dramatic changes in relative condition factor were observed. Length frequency distribution was found to be normal with maximum number of fish in mid length groups and minimum in the lowest and highest length groups. DOI: http://dx.doi.org/10.3329/cujbs.v3i1.13412 The Chittagong Univ. J. B. Sci.,Vol. 3(1&2):119-126, 2008

scholarly journals Crustacean parasites of Leporinus affinis, an Anostomidae fish from the Brazilian Amazon

2020 ◽  
Vol 29 (2) ◽  
Author(s):  
Huann Carllo Gentil Vasconcelos ◽  
Júlio César Sá-Oliveira ◽  
Débora da Conceição Oliveira Salomão ◽  
Marcos Tavares-Dias
Keyword(s):  
Cluster Analysis ◽  
Species Diversity ◽  
Condition Factor ◽  
Brazilian Amazon ◽  
The Body ◽  
Parasite Abundance ◽  
Host Interactions ◽  
Relative Condition Factor ◽  
Host Sex ◽  
Crustacean Parasites

Abstract This study investigated the fauna of ectoparasitic crustaceans in Leporinus affinis from Reservoir Coaracy Nunes, in eastern Amazon (Brazil), as well as the parasite-host interactions. The mouth, gills and tegument of 50.9% of the fish examined were parasitized by Argulus chicomendesi, Ergasilus turucuyus and Excorallana berbicensis, and a total of 118 parasites were collected. The dominance was found for E. berbicensis and the higher infestation levels were caused by E. berbicensis on the body surface of the hosts, but E. turucuyus had the highest prevalence on the gills of this host. The cluster analysis revealed higher similarity in the infestations by E. berbicensis and A. chicomendesi in relation to infestation site in hosts. Host sex and relative condition factor (Kn) were not influenced by moderate parasitism, but the abundance of parasites presented negative correlation with weight and Kn of the fish. This is the first study on the parasites of L. affinis showing low species diversity, with moderate prevalence and low parasite abundance.

scholarly journals Length-weight relationship and relative condition factor of Liza subviridis (Valenciennes, 1836) in Pinang River Estuary, Balik Pulau, Penang, Malaysia

2017 ◽  
Vol 64 (3) ◽  
Author(s):  
N. Zolkhiflee ◽  
K. M. Zain ◽  
M. Y. Hossain ◽  
K. Yahya
Keyword(s):  
Condition Factor ◽  
River Estuary ◽  
B Value ◽  
T Test ◽  
Male And Female ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
Significant Difference ◽  
Dry Seasons ◽  
Wet And Dry Seasons

Length-weight relationship and relative condition factor (Kn) of greenback mullet Liza subviridis (Valenciennes, 1836) were estimated from 2286 samples (635 males and 1651 females) collected from the Pinang River Estuary, Balik Pulau, Penang from March 2013 to February 2014. The length-weight relationship and growth pattern were: W = 0.0117 L2.9989 (isometric) for pooled samples (male and female together), W = 0.0157 L2.8787 (negative allometric) for males and W = 0.0109 L3.0284 (isometric) for females. Independent t-test showed that female b value was higher than that of the males (p<0.05) with no significant difference between the wet and dry seasons (independent t-test, p>0.05). The mean Kn of L. subviridis was 1.01±0.13; however, no significant difference was detected between wet and dry seasons and between male and female samples (independent t-test, p>0.05).

scholarly journals Morpho-biometric Relationship, Relative Condition Factor and Meat Yield of Distant Scallop Bractechlamys vexillum (Reeve, 1853) in Asid Gulf, Philippines

2019 ◽  
Vol 32 (4) ◽  
Author(s):  
IAN CRIS RAQUINIA BUBAN ◽  
◽  
VICTOR SALCEDO SOLIMAN ◽  
RENAN UGTO BOBILES ◽  
ALEX PULVINAR
Keyword(s):  
Condition Factor ◽  
Meat Yield ◽  
Relative Condition Factor

scholarly journals Length-Weight Relationships and Condition Factors of the Naleh Fish, Barbonymus gonionotus (Pisces, Cyprinidae) Harvested from Nagan Raya Waters, Indonesia

2019 ◽  
Vol 53 (1) ◽  
pp. 75-82 ◽  
Author(s):  
A. S. Batubara ◽  
Z. A. Muchlisin ◽  
D. Efizon ◽  
R. Elvyra ◽  
M. Irham
Keyword(s):  
Growth Pattern ◽  
Condition Factor ◽  
Growth Parameters ◽  
Good Condition ◽  
Relative Weight ◽  
Stable Condition ◽  
B Value ◽  
Food Sources ◽  
Survey Method ◽  
Fish Samples

Abstract The objective of the present study was to examine the growth pattern and condition factors of the naleh fish, Barbonymus gonionotus Bleeker, 1849 in Nagan River, Nagan Raya District, Aceh Province, Indonesia. The sampling was conducted for 12 months from January 2016 to December 2016 using the explorative survey method. The sampling locations were determined based on the information given by local fishermen. A total of 761 fish samples were collected during the study. The Linear Allometric Model (LAM), Fulton’s and Relative Weight conditions factors were utilized to analyze the length-weight relationship and condition factor of the fish using growth parameters. The results showed that the highest coefficient of b was recorded in December, where the b value of males were 3.82 and 4.23 for the females with the average b value of males and females were 2.92 indicating an isometric growth pattern. The average Fulton’s condition factor (K) was 2.28 and the average Relative weight (Wr) condition factor was 100.59. It is concluded that fish had the isometric growth pattern and based on K and Wr value, the result implies that the waters are still in a good condition. Furthermore, the availability of food sources, low competitors, and low predators indicate that the aquatic environment is in a stable condition.

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