scholarly journals Metacercariae of Austrodiplostomum compactum (Lutz, 1928) (Trematoda, Diplostomidae) infecting the eyes of Plagioscion squamosissimus (Heckel, 1840) (Perciformes, Scienidae) from Lake Catalão, Amazonas, Brazil

2017 ◽  
Vol 47 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Natália Brandão de ALBUQUERQUE ◽  
Germán Augusto Murrieta MOREY ◽  
Aprigio Mota MORAIS ◽  
José Celso de Oliveira MALTA
Keyword(s):  
Body Length ◽  
Fish Species ◽  
Significant Positive Correlation ◽  
Condition Factor ◽  
Digenetic Trematode ◽  
Gill Nets ◽  
Aggregate Distribution ◽  
Relative Condition Factor ◽  
Lack Of Information ◽  
Low Degree

ABSTRACT Austrodiplostomum compactum is a digenetic trematode whith metacercariae that occur in the eyes of a wide variety of fish species. In Brazil, A. compactum metacercariae have been reported in many fish species, but there are only a few studies in the Amazon region. Due to the lack of information in the Amazon, the aim of this study was to report the occurrence of A. compactum metacercariae in the eyes of 15 specimens of Plagioscion squamosissimus from the Lake Catalão, in Amazonas, Brazil. Fishes were collected using gill nets placed randomly in the lake, euthanized in a field laboratory, and had their eyes dissected and examined under a stereomicroscope. A total of 801 metacercariae were registered infecting the eyes of the hosts with a parasitic prevalence of 100%. There was a significant positive correlation between the number of metacercariae recorded and the standard body length of fishes. No significant correlation was found between the number of metacercariae and the weight and relative condition factor (Kn) of the hosts. Values of the variance-to-mean ratio and Green's index suggested an aggregate distribution of the parasites in the hosts, with a low degree of aggregation. This is the first report of occurrence of A. compactum parasitizing a fish in the Lake Catalão.

scholarly journals Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil

2012 ◽  
Vol 10 (3) ◽  
pp. 653-659 ◽  
Author(s):  
Márcio Fontana ◽  
Ricardo Massato Takemoto ◽  
José Celso de Oliveira Malta ◽  
Lúcia Aparecida de Fátima Mateus
Keyword(s):  
River Basin ◽  
Body Length ◽  
Fish Species ◽  
Host Species ◽  
Condition Factor ◽  
Hydrological Cycle ◽  
Mato Grosso ◽  
Paraguay River ◽  
Relative Condition Factor ◽  
Pygocentrus Nattereri

In this study, 446 fishes were analyzed: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus, and 63 S. marginatus.They were captured in two bays, upper and lower Caiçara, in the upper Paraguay River basin, during one hydrological cycle from May 2008 to April 2009. Six species of Branchiura were found: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi, and Dipteropeltis hirundo. All fish species were infested by more than one species of Branchiura and the overall prevalence was 33.4%. The following prevalences were observed: 52.6% in P. nattereri; 20.3% in S. maculatus, and 15.8% in S. marginatus. The relative condition factor (Kn) differed significantly between parasitized and non parasitized individuals only in P. nattereri and S. maculatus. There was no correlation between Kn and abundance of parasites nor between body length (Ls) and intensity of infestation, in all three host species.

scholarly journals Length–Weight, Length–Length Relationships and Condition Factor of Chondrostoma regium (Heckel, 1843) and Barbus lacerta, Heckel, 1843 From Karasu River (East Anatolia, Turkey)

2018 ◽  
Vol 6 (6) ◽  
pp. 729 ◽  
Author(s):  
Osman Serdar ◽  
Ebru İfakat Özcan
Keyword(s):  
Fish Species ◽  
Condition Factor ◽  
B Values ◽  
Total Length ◽  
Relative Condition Factor ◽  
First Time ◽  
East Anatolia

Length–weight, length–length relationships and condition factors were estimated for two fish species (Chondrostoma regium, Barbus lacerta) caught between October 2014 and September 2015 in the 14 distinct locations of Karasu River, East Anatolia, Turkey. Minimum and maximum total length and weight were observed at 7.5 to 31.0 cm and from 5.7 to 280 g for C. regium, 7.0 to 24.0 cm and from 4.0-211 g for B. lacerta. The b values determined as 2.77 for Chondrostoma regium; 3.10 for Barbus lacerta. The types of growth were found negative allometric for C. regium and isometric growth for B. lacerta. The length-length relations between total, fork, and standard lengths for the two fish species were highly significant. The relative condition factor values were found to 1.102±0.013 for C. regium; 1.176±0.019 for B. lacerta. This study submits for the first time LWR, LLR and condition factor of two species in the Karasu River.

scholarly journals Inequality in the distribution of 137Cs contamination within freshwater fish bodies and its affecting factors

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nobuyoshi Ishii ◽  
Toshio Furota ◽  
Maiko Kagami ◽  
Keiko Tagami ◽  
Shigeo Uchida
Keyword(s):  
Nutritional Status ◽  
Freshwater Fish ◽  
Body Length ◽  
Fish Species ◽  
Crucian Carp ◽  
Condition Factor ◽  
Silver Carp ◽  
Fresh Weight ◽  
Internal Organs ◽  
Fish Samples

AbstractContamination of freshwater fishes with 137Cs remains as a serious problem in Japan, nearly 10 years after the Fukushima nuclear power plant accident, but there is limited information on the distribution of 137Cs contamination in fish bodies. The 137Cs distribution can be used for the estimation of internal radiation exposure through the consumption of fish and for the dose estimation of fish themselves. In this study, the 137Cs distribution in the bodies of 8 freshwater fish species was investigated as percentages of total body burden for fish inhabiting Lake Inba. Fish samples were caught in stake nets placed close to the shore approximately once a month. After the measurement of body length and fresh weight, the radioactivities of 137Cs in muscle, internal organs, spawn, milt and bone were assayed using high-purity germanium detectors. Analysis of all fish samples showed that the 137Cs distribution was highest in muscle (54 ± 12%), followed by internal organs (7.8 ± 4.6%), spawn (7.4 ± 5.4%), milt (3.2 ± 2.1%) and bone (1.2 ± 0.58%). Among fish species, the highest proportion of 137Cs in muscle was detected in largemouth bass (71 ± 1 3%), followed by snakehead (69 ± 14%), channel catfish (63 ± 17%), common carp (62 ± 14%), barbel steed (58 ± 6.5%), silver carp (57 ± 7.7%), bluegill (53 ± 4.7%), and crucian carp (50 ± 10%). These results suggested that the 137Cs in muscle was likely to be high in piscivorous fishes compared to omnivorous fishes, especially crucian carp. The proportion of 137Cs in muscle of crucian carp was not explained either by body length or fresh weight. However, a positive correlation was found between the proportion of 137Cs in muscle and the condition factor which was an indicator of nutritional status calculated from a length–weight relationship. This correlation implied that more 137Cs accumulated in muscle tissue of a fish species with high nutritional status. This is the first study to show that condition factor is more important than body length and wet weight in explaining the high proportion of 137Cs in muscle tissues, at least for crucian carp.

scholarly journals Length-weight relationship and relative condition factor of five Labeo spp. from river Cauvery in India

2019 ◽  
Vol 66 (2) ◽  
Author(s):  
S. Sibina Mol ◽  
A.K. Jaiswar ◽  
P. Panikkar ◽  
B.K. Behera ◽  
H. Sanath Kumar ◽  
...  
Keyword(s):  
Fish Species ◽  
Large Scale ◽  
Condition Factor ◽  
Regression Coefficient ◽  
Maximum Length ◽  
Cauvery River ◽  
Peninsular India ◽  
Weight Relationship ◽  
Relative Condition Factor ◽  
First Time

Length-weight relationship (LWR) of five species of the genus Labeo (Family: Cyprinidae) namely L. rohita (Hamilton,1822), L. calbasu (Hamilton,1822), L. bata (Hamilton,1822), L. dyocheilus (McClelland, 1839) and L. porcellus (Heckel, 1844), based on 214 specimens collected from Cauvery River in Peninsular India, were established. Sampling was carried out from December 2017 to December 2018 at around three months interval. The value of regression coefficient (b) ranged from 2.6147 (L. bata) to 3.2855 (L. dyocheilus). A new maximum length of 41 cm for L. porcellus has been recorded. For L. porcellus, LWR is established for the first time while for other species (except L. rohita); it is estimated for the first time from a peninsular river in India. Relative condition factor estimated for the five fish species did not show large scale variation (1.001 to 1.019).

scholarly journals Comparison of Length and Weight Characteristics of O. niloticus and O. aureus from Garmat Ali River, Iraq

2021 ◽  
pp. 39-51
Author(s):  
Abdul-Razak M. Mohamed ◽  
Ayat N. Salman
Keyword(s):  
Fish Species ◽  
Condition Factor ◽  
Age Groups ◽  
Age And Growth ◽  
Allometric Growth ◽  
Frequency Distributions ◽  
Cichlid Species ◽  
Relative Condition Factor ◽  
Dominant Fish ◽  
Management And Conservation

Cichlid species invaded the Iraqi waters in the mid-2000s and are now dominant fish species. The present study was carried out to investigate the age and growth of two cichlid species, Oreochromis niloticus and O. aureus in Garmat Ali River, Iraq from October 2019 to September 2020. A total of 2707 specimens of O. niloticus ranging from 7.0 to 25.5 cm and 1664 of O. aureus varying from 7.0 to 26.3 cm were examined which were captured by various fishing gears. The length-frequency distributions revealed that fish lengths (13.0-18.0 cm) formed 64.1% of the total catch of O. niloticus and 67.2% of O. aureus. The length-weight relationships were W=0.012*L3.109 for O. niloticusand W=0.015*L3.075 for O. aureus, and both species indicated positive allometric growth. The highest values of the relative condition factor were obtained during spring and the values decrease when length of two species increase. Seven age groups were determined for O. niloticus: 9.9, 12.9, 15.6, 17.9, 19.4, 20.4 and 22.2 cm, and for O. aureus: 9.3, 12.5, 15.2, 18.0, 19.4, 21.3 and 22.2 cm. The theoretical maximum length (L∞) was 29.2 cm for O. niloticus and 28.6 cmfor O. aureus. These results can assist in fisheries management and conservation of the fish species in Iraqi waters.

scholarly journals Length-weight relationship and condition factor of Sphyraena afra from the coastal waters of Lagos State

2019 ◽  
Vol 27 (1) ◽  
pp. 27-31
Author(s):  
Caroline Ireti Ayo-Olalusi ◽  
Adedolapo Abeke Ayoade
Keyword(s):  
Correlation Coefficient ◽  
Body Length ◽  
Fish Species ◽  
Coastal Waters ◽  
Condition Factor ◽  
Allometric Growth ◽  
Weight Relationship ◽  
Lagos State ◽  
Lagos Lagoon ◽  
The Mean

Abstract The length-weight relationship and condition factor of Sphyraena afra from the Lagos coast (LC) and the Lagos lagoon complex (LLC) in the coastal waters of Lagos State were studied for a period of two years. Parameters a and b of the length-weight relationship were estimated using the equation W = a x TLb, while the condition factor was calculated with the equation K = 100 x BW x TL-3. The relationships of fish condition factor and body length, sex, and seasons in Lagos coastal waters were determined. The species exhibited negative allometric growth (b < 3, P < 0.05) for males, females, and combined sexes with the length exponent (b) ranging from 2.72 to 2.85. Correlation coefficient r ranged from 0.89 to 0.98. The allometric growth values obtained in LC and LLC from the length-weight relationship indicated that the fish species exhibited increases in length rather than in weight. The overall mean condition factors (K) for S. afra from the LC and the LLC were 0.97 ± 0.11 and 1.17 ± 0.12, respectively. The mean condition factors of females were higher than those for males at most of the sampling stations, and S. afra was observed to be in better condition during the dry season.

scholarly journals Parasitic community of Fransciscodoras marmoratus (Reinhardt, 1874) (Pisces: Siluriformes, Doradidae) from the upper São Francisco river, Brazil

2006 ◽  
Vol 66 (3) ◽  
pp. 931-938 ◽  
Author(s):  
M. D. Santos ◽  
M. C. Brasil-Sato
Keyword(s):  
Parasite Species ◽  
Condition Factor ◽  
Parasite Community ◽  
Parasite Fauna ◽  
Sao Francisco River ◽  
Aggregate Distribution ◽  
Low Intensity ◽  
Relative Condition Factor ◽  
São Francisco River ◽  
Lernaea Cyprinacea

One hundred and thirteen specimens of Franciscodoras marmoratus (Reinhardt, 1874) were collected in the upper São Francisco River (18° 12' 32" S, 45° 15' 41" W, state of Minas Gerais) between September, 1999 and January, 2004 to investigate their parasite fauna. From this total, 45 (39.8%) were afflicted by at least one parasite species. The parasitic richness consisted of six species represented by Hirudinea (n = 20), Monogenoidea (n = 25), Eucestoda (n = 55), Nematoda (n = 1, n = 2) and Acanthocephala (n = 41) found in the dry and wet periods making a total of 144 specimens. Proteocephalus renaudi Chambrier & Vaucher, 1994 was the only species with prevalence higher than 10% and a typical aggregate distribution pattern. The prevalence, intensity and abundance of P. renaudi were not influenced by the total length or sex of the hosts or by the collection periods. The relative condition factor indicated that the health of the P. renaudi hosts was not significantly affected in relation to fish not infected by parasites. The fish stocked in tanks before necropsy were opportunistically infested by Lernaea cyprinacea Yashuv, 1959. The various parasites found indicate that F. marmoratus is omnivorous and a potential definitive host. The parasite species, except for Acanthocephala, have expanded their known geographic distribution to the São Francisco River Basin. The parasite community was considered isolationist because of the low endoparasite diversity, infrapopulations with low intensity, lack of evidence of parasite interactions and sparse signs of parasite aggression against their 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).

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