scholarly journals Length-weight relationship for two fish species from Ipanema National Forest, São Paulo state, Brazil

2020 ◽  
pp. e749
Author(s):  
Thais Aparecida Soinski ◽  
Matheus Souza Costa ◽  
Eduardo Meneguzzi Brambilla ◽  
Welber Senteio Smith
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Condition Factor ◽  
Biological Information ◽  
National Forest ◽  
Paulo State ◽  
Length Relationship ◽  
Conservation Actions ◽  
Different Populations ◽  
Management And Conservation

The weight-length relationship is an important tool in the studies of fish biology, physiology and ecology, as this relationship is useful for determining weight and biomass, indicating conditions and allowing comparisons between the growth of different populations, in addition, this relationship can also be used to assess the degree of health of species in the environment. The objective of this study was to present unpublished data on the weight-length relationship (LWRs) of the species Hypostomus ancistroides and Corydoras flaveolus. The fish were sampled in the months of January and June 2013 in rivers of the Ipanema National Forest, sub-basin of the Ipanema River, collected through sieves and trawls. 91 individuals were captured, distributed in one order and two families 52 from Hypostomus ancistroides and 39 from Corydoras flaveolus. The results of this study showed that the Hypostomus ancistroides is outside of what is expected for parameter “a” 0.0058 (0.0043-0.0072), and Corydoras flaveolus is outside of what is expected for parameter “b” 3.75 (3.38-4.11), these date consisted of important biological information for freshwater fish, as this relationship justifies the search for mathematical improvement of the indices, as well as standardization of the types of condition factor used in studies with the same species, facilitating comparisons and, consequently, management and conservation actions.

scholarly journals Growth pattern of three species of Mullets (Pisces: Mugilidae) in Sombreior River, Rivers State, Niger Delta, Nigeria

2020 ◽  
Vol 5 (2) ◽  
pp. 68-72 ◽  
Author(s):  
Henry Eyina Dienye ◽  
Olaniyi Alaba Olopade
Keyword(s):  
Fish Species ◽  
Growth Pattern ◽  
Niger Delta ◽  
Condition Factor ◽  
Well Being ◽  
Biological Information ◽  
Allometric Growth ◽  
Good State ◽  
Abiotic And Biotic Factors ◽  
Rivers State

Length-weight relationships (LWRs) and condition factor are important biological information to assess the growth pattern and wellbeing of fish species influenced by numerous abiotic and biotic factors. To date, no data on the LWRs and condition of mullets in Sombreior River, Niger Delta. Hence, this research was conducted to determine abundance, length–weight relationship and Fulton’s condition factor (K) of three species of fish belonging to family Mugilidae in Sombreior River, Nigeria. There were a total of 248 samples from five sampling stations for a period of months. Fish species were of various sizes ranging from 24.66±0.40 to 26.35±0.26cm in length and 141.41±6.30 to 161.56±5.87g in weight. For the three species, slope (b) values ranged from 2.18 to 2.68 indicating a negative allometric growth of all fish species. The mean condition factor ranged from 0.89±0.03 forsix Mugil cephalus to 0.93±0.03 for Parachelon grandisquamis while the coefficients of determination (R2) of the LWR regressions ranged between 0.64 (Neochelon falcipinnis) and 0.79 (Parachelon grandisquamis). It was concluded that the mullets in the Sombreior River had a negative allometric growth pattern and the condition is showing the species were in good state of well-being since mean K values are  greater than 1.

scholarly journals Size Frequency Distribution, Length-length and Weight-length Relationships and Condition Factor of Eight Fish Species of Nkam River, Coastal Cameroon

2020 ◽  
pp. 1-12
Author(s):  
Claudine Tekounegning Tiogué ◽  
Evrard Kouopestchop Medjo ◽  
Franklin David Ndilock Makongo
Keyword(s):  
Frequency Distribution ◽  
Fish Species ◽  
Condition Factor ◽  
Coastal Region ◽  
Small Fish ◽  
Size Frequency Distribution ◽  
Size Frequency ◽  
Length Relationship ◽  
Growth Performances ◽  
Sarotherodon Galilaeus

Aims: To assess the aquaculture potential of endogenous species in their habitat for domestication and preservation. Study Design: Growth performances of fish caught was analyzed by family, species, sex and month. Place and Duration: This study was conducted from April 12 to June 28, 2016 at CREVS (Cameroon Reptiles and Ecosystems Valorization Society) located in the District of Yabassi, Department of Nkam, Coastal Region of Cameroon. Methodology: A total of 160 fishes were collected by quantitative sampling for 3 months in the Nkam River. Results: It appears that two families of fish were recorded: the Cyprinidae (Labeo sanagaensis) and the Cichlidae (Tilapia cameronensis, Sarotherodon galilaeus sanagaensis, Sarotherodon nigripinnis dolloi, Tylochromis sudanensis, Hemichromis elongatus, Tylochromis trewavasae and Chromidotilapia gutheri gutheri). L. sanagaensis recorded the highest relative abundance (30%) against 3.13% (C. gutheri gutheri). Large fish were recorded in the majority of species in males, except in T. trewavasae and H. elongatus. The average total length was 23.71 ± 8.31 cm and the average total weight was 266.11 ± 200.96 g. Size frequency distribution of fish was bimodal with a large mode at size 20 cm and a small at size 36 cm. Small fish were abundant in catches especially in S. nigripinnis dolloi and C. gutheri gutheri. The allometric coefficient b of the weight-length relationship averaged 3.01 ± 0.87. The fish presented three types of growth: isometric, positive and negative allometric, and the condition factor K was greater than 1. Conclusion: It was concluded that these fish species could in general be potential candidates for domestication.

scholarly journals Relationship between Fulton's condition factor and proximate body composition in three freshwater fish species

2014 ◽  
Vol 31 (2) ◽  
pp. 315-320 ◽  
Author(s):  
A. Mozsár ◽  
G. Boros ◽  
P. Sály ◽  
L. Antal ◽  
S. A. Nagy
Keyword(s):  
Body Composition ◽  
Freshwater Fish ◽  
Fish Species ◽  
Condition Factor ◽  
Freshwater Fish Species

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.

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 condition factor of three endemic fish species, Ponticola bathybius, Neogobius caspius and N. pallasi (Perciformes: Gobiidae) from the Southern Caspian Sea basin, Iran

2021 ◽  
Vol 38 (4) ◽  
pp. 523-525
Author(s):  
Nasrin Nikmehr ◽  
Soheil Eagderi ◽  
Hadi Poorbagher ◽  
Keyvan Abbasi
Keyword(s):  
Fish Species ◽  
Caspian Sea ◽  
Condition Factor ◽  
Biological Information ◽  
Biological Research ◽  
The Caspian Sea ◽  
Baseline Information ◽  
Endemic Fish ◽  
First Time ◽  
Southern Caspian Sea

In this study, the length-weight relationships (LWRs) and condition factors were estimated for 445 specimens belonging to three gobiid species viz. Ponticola bathybius (Kessler, 1877), Neogobius caspius (Eichwald, 1831) and Neogobius pallasi (Berg, 1916) from the Southern Caspian Sea basin. Total length and total weight of the examined specimens ranged 4.9-28.3 cm and 0.64-263.4 g, respectively. The length-weight parameter b of the studied species found between 2.47 (N. caspius) and 3.45 (N. pallasi) with r2 ranging 0.831 to 0.988. LWR and K parameters are reported first time for N. pallasi from the Caspian Sea basin. The condition factor estimated was calculated from 0.94 (N. pallasi) to 0.98 (N. caspius) and 1.00 (P. bathybius). The basic biological information on the LWRs of these three gobies will be useful as baseline information for further biological research in the region.

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.

Sign in / Sign up

Export Citation Format

Share Document