scholarly journals Growth pattern of freshwater bivalve mollusk Lamellidens marginalis (Lamarck, 1819) from the northwest Bangladesh

2019 ◽  
Vol 27 ◽  
pp. 121-132
Author(s):  
DA Nahar ◽  
MR Islam ◽  
MS Islam ◽  
S Jasmine ◽  
MMR Mondol
Keyword(s):  
Growth Pattern ◽  
Fishery Management ◽  
Freshwater Mussel ◽  
Freshwater Ecosystem ◽  
Allometric Growth ◽  
Freshwater Bivalve ◽  
Shell Weight ◽  
Tissue Weight ◽  
Length Width ◽  
Sustainable Fishery

Growth, morphometry and length-weight relationships of the freshwater mussel Lamellidens marginalis (Lamarck, 1819) was studied during January 2014 and May 2015. Sampling was carried out monthly and a total of 560 specimens were collected from Rajshahi district, northwest of Bangladesh. The recorded length -breadth and length-width relationships were B = 0.179 + 0.475L and W = 0.196 + 0.3163L respectively. The length-total weight, length-wet tissue weight, length-dry tissue weight, length-shell weight, length-dry shell weight relationships were W = 0.1241L2.9066, W = 0.0524L2.7377, W =0.0116L2.7849, W = 0.0533L2.9178 and W = 0.0391L3.0386 respectively. Monthly b values of length-lengths and length-weights relationships indicated a negative allometric growth pattern except length-shell weights relationships which showed an isometric growth of the mussel. This study is the first report on growth pattern of Lamellidens marginalis from Bangladesh and the results would be useful for fishery managers to impose adequate regulations for a sustainable fishery management of this species in the freshwater ecosystem in Bangladesh. J. bio-sci. 27: 121-132, 2019

scholarly journals Morphometric relationships of the siphon clam Panopea globosa (Bivalvia: Hiatellidae) in the southeasternmost of the Gulf of California, Mexico

2019 ◽  
Vol 53 (3) ◽  
pp. 363
Author(s):  
Andrés Martín Góngora-Gómez ◽  
Maria Isabel Sotelo-Gonzalez ◽  
Apolinar Santamaría-Miranda ◽  
Manuel García-Ulloa
Keyword(s):  
Body Weight ◽  
Shell Length ◽  
Gulf Of California ◽  
Coefficient Of Determination ◽  
Shell Weight ◽  
Relative Growth ◽  
First Report ◽  
Tissue Weight ◽  
Length Width

The morphometric relationships of the siphon clam Panopea globosa from Sinaloa, Mexico, were analyzed from February 2014 to April 2015. A total of 370 specimens were collected, measured (shell length, width, and height) and weighed (body weight, tissue weight, and shell weight). The coefficient of determination indicated variation in the fitting of morphometric variables among measured traits. The type of relative growth for all morphometric relationships was negative allometry. This is the first report on morphometric relationships of P. globosa from Sinaloa, Mexico.

scholarly journals Growth Pattern and Morphological Variation of Labeo calbasu Found in Indus River, Sindh-Pakistan

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Sumeera Malik ◽  
Ayaz Hussain Qadri ◽  
M. Y. Laghari ◽  
P. K. Lashari ◽  
A. R. Khuharo ◽  
...  
Keyword(s):  
Growth Pattern ◽  
Sustainable Management ◽  
Fishery Management ◽  
Condition Factor ◽  
Stock Assessment ◽  
Morphological Characters ◽  
Allometric Growth ◽  
Indus River ◽  
Commercially Important ◽  
River Indus

The present work reports the length–weight relationships (LWR) and condition factor relationships for Labeo calbasu collected from Upstream (Matyari) Kotri barrage at, River Indus, Pakistan, because stock assessment helps the fisheries managers to conserve the commercially important fish. Morphological characters of fish as well as Length-weight relationship are an important tool for fishery management. The results of LWR (W= aLb), for L calbasu.  Representing negative allometric growth pattern. LWRs and condition factor relationships were found significantly correlated. A total of 200 and 190 specimens from upstream and downstream were collected, respectively. The assessed values of length-weight correlation and condition factor were calculated as Kn=39.663 (LeCren), and K=11.915 (Fulton) for upstream and Kn=44.066 and K=13.872 for downstream. Length-weight was found with a strong correlation of n= 2.892, a=0.0235 with r2=0.934 for upstream population then the downstream population.  The results of this work would be beneficial for sustainable management as well as fishery managers.  

Comparative Egg Production, Quality and Hatchability in Three Chicken Genotypes under Humid Tropical Conditions

2021 ◽  
Vol 19 (1) ◽  
pp. 38-52
Author(s):  
O.P Omoyara ◽  
M.O Abioja ◽  
O.S Iyasere ◽  
L.T Egbeyale
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Shape Index ◽  
Production Quality ◽  
Internal Quality ◽  
Shell Weight ◽  
Naked Neck ◽  
Weight Percentage ◽  
Tropical Conditions ◽  
Length Width

Comparative study on egg production and hatchability characteristics in Nigerian local (NL; n=24), FUNAAB-α (F-α; n=24) and Transylvanian naked neck (TNN; n=24) chickens aged 25 weeks old was carried out for 4 weeks. Three hundred and sixty hatchable eggs each were used for quality characteristics determination and for incubation. F-α had significantly (P<0.001) higher egg production (90.3%) than TNN (76.9%) while TNN was higher than NL (58.3%). Egg weight (EWT), length, width and surface area, albumen height, weight, percentage and index, shell weight, color and internal quality unit (IQU) were significantly (P<0.001) affected by genotype. These followed the pattern: NL<F-α<TNN. F-α and TNN had significantly (P<0.001) higher values than NL in egg shape index, yolk weight, height and diameter. Yolk colour index was significantly (P<0.01) higher in TNN than in F-α. Yolk percentage and yolk-albumen ratio followed the pattern: NL>F-α>TNN. NL had (P<0.001) thicker and higher shell percentage (SP) than F-α and TNN. Higher Haugh unit (HU) was recorded in TNN than in NL and F-α. Fertility was significantly (P<0.05) higher in F-α than in TNN. Hatchability was not (P>0.05) affected by genotype. Chick weight and chick: egg ratio were significantly (P<0.001) by genotype. TNN had higher chick weight and yield than F-α and NL chicks. In conclusion, F-α laid more eggs than others, exhibited higher fertility with longer chicks at hatch. TNN is superior in EWT, HU, IQU and chick yield. NL had higher SP than others. Keywords: Egg production, Egg quality, FUNAAB alpha chicken, Hatchability, Transylvanian naked neck chicken.

scholarly journals A comparison of the allometric growth in Uca leptodactyla (Crustacea: Brachyura: Ocypodidae) from two subtropical estuaries

2004 ◽  
Vol 84 (4) ◽  
pp. 733-735 ◽  
Author(s):  
Rosana Carina Flores Cardoso ◽  
Maria Lucia Negreiros-Fransozo
Keyword(s):  
Growth Pattern ◽  
Sexual Maturity ◽  
Carapace Length ◽  
Brazilian Coast ◽  
Allometric Growth ◽  
Size At Sexual Maturity ◽  
Subtropical Estuaries ◽  
Habitat Similarity

The allometric growth of Uca leptodactyla from two distinct subtropical estuaries on the Brazilian coast was evaluated concerning its growth pattern and size at onset of sexual maturity. Females attained maturity at similar sizes in both sites (4·1 mm of carapace length in Indaiá and 4·2 mm in Ubatumirim), while males differed slightly. They reached the size at sexual maturity of 5·3 mm of carapace length in Indaiá and 4·6 mm in Ubatumirim. Growth pattern is usually similar among crabs from distinct sites while size at sexual maturity is frequently different. However, in the case of U. leptodactyla it did not occur, probably due to the strong habitat similarity and intrinsic features of this species.

scholarly journals Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae)

2016 ◽  
Vol 106 (0) ◽  
Author(s):  
José R. S. Barradas ◽  
Isabel S. Lermen ◽  
Gabriel G. Larré ◽  
Thaís P. Martins ◽  
Nelson F. Fontoura
Keyword(s):  
Growth Pattern ◽  
Rio Grande ◽  
Allometric Growth ◽  
Rio Grande Do Sul ◽  
Power Equation ◽  
Length Relationship ◽  
First Maturity ◽  
Changing Rate ◽  
Specific Length

ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing point for the switch function. The stanza changing point was estimated as 5.28 cm, corresponding with the length at first maturity for this species Lmat (5.29 cm). Our data suggest that a complex growth pattern can be in nature, and perhaps not often identified because trends are obscured by natural variability.

scholarly journals Length-weight relationships and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes) in River Galma, Zaria, Kaduna State, Nigeria

2017 ◽  
Vol 4 (8) ◽  
pp. 301-305
Author(s):  
Matouke M. Moise
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Growth Pattern ◽  
Condition Factor ◽  
Allometric Growth ◽  
Male And Female ◽  
B Values ◽  
The Poor ◽  
Poor Water Quality ◽  
The Mean

The investigation of length-weight relationship and condition factor are very relevant indices to ascertain the health of fish in the water body. Length-weigh relationship and condition factor of Hyperopisus bebe (Lacepede, 1803) (Actinopterygii: Osteoglossiformes: Mormyridae) in River Galma, Zaria, Kaduna State, Nigeria, were assessed. The mean length and mean weigh in male and female were 26.703 cm +/- 0.51 cm and 25.32 cm +/- 0.898 cm; 158.2 g +/- 10.1 g and 95.91 g +/- 9.26 g, respectively. The exponent or growth pattern 'b' values for male and female were 2.009 and 2.176. The condition factor for male and female were 0.59 and 0.83, respectively. The negative allometric growth pattern and poor condition factor might be due to the poor water quality in the fish ecosystem and should be regarded with concern.

scholarly journals Shell Growth Pattern and Percentage Flesh Yield of the West African Clam, Galatea paradoxa (Born, 1778) from Itu Creek, Niger Delta Nigeria

2020 ◽  
Vol 27 (2) ◽  
pp. 119-126
Author(s):  
V.F. Akinjogunla ◽  
R.O. Moruf
Keyword(s):  
Growth Pattern ◽  
Niger Delta ◽  
Shell Growth ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Maximum Height ◽  
Maximum Width ◽  
Shell Weight ◽  
The Mean ◽  
Galatea Paradoxa

Shell Morphometry is a fundamental tool for the evaluation of phenotypic stocks. The shell growth pattern and percentage flesh yield of Galatea paradoxa from Itu Creek in Niger Delta were investigated using standard morphometric methods. The mean in centimeter (cm) of 9.71±0.09, 35.02±0.22, 23.21±0.12, 37.11±0.25, 29.31±0.16 and 7.32±0.04 were recorded for shell length, maximum width, maximum height, nacre length, nacre width and hinge length respectively. Mean live weight of 115.70±1.09 g, mean flesh weight of 37.91 ± 0.23g and mean shell weight of 66.82±0.97 g were recorded for this species. Galatea paradoxa showed negative allometric growth (b < 3) while the correlation coefficients (r) in all the shell variables were far below „1‟, indicating a week correlation between the parameters. About 19% of the live weight of the clam is made up of flesh by weight. Keywords: Bivalve, Clam, Shell dimension, Niger Delta.

scholarly journals Egg parameters of the Red Wattled Lapwing (Vanellus indicus) in agricultural ecosystem of Punjab

2017 ◽  
Vol 9 (3) ◽  
pp. 1419-1421
Author(s):  
Manpreet Kaur ◽  
K. S. Khera
Keyword(s):  
Specific Gravity ◽  
Shape Index ◽  
Egg Volume ◽  
Agricultural Ecosystem ◽  
Species Classification ◽  
Shell Weight ◽  
Additional Information ◽  
Volume Weight ◽  
Length Width ◽  
Egg Components

The Red Wattled Lapwing is an important bird of the agro-ecosystem of the Punjab state, feeding on insects, seeds and nectar. The present study was carried out to gather information on the egg parameters (morphometry and its components), which is lacking for this species. The eggs were observed in the nest construct-ed in the agricultural fields of Punjab Agricultural University (PAU), Ludhiana, Punjab. Egg length, width and weight were measured using vernier caliper and portable weighing balance, respectively, in laboratory. The egg parameters like egg volume, specific gravity and shape index were also calculated. Weight of egg components (yolk, albumen and shell) were also measured using weighing balance. Results revealed that average values of egg breadth, length and shape index were: 30.05±0.331 (mm), 41.29±0.573 (mm) and 72.83±0.930, respectively. Whereas whole egg weight, albumen weight, yolk weight, shell weight, albumen percentage, yolk percentage, shell percentage, egg volume and specific gravity were 17.49±0.634(gm),7.17±0.374 (gm), 9.05±0.233 (gm), 1.26±0.070 (gm), 40.84±0.941 (%), 51.92±0.830 (%), 7.22±0.280 (%), 17.07±0.531(cm3) and 1.02±0.009 (gm/cm3), respectively. This study pro-vides important information that can help the avian taxonomists in species classification, as bird’s egg diverges widely in shape, volume, weight and percentage of albumen, yolk and shell. Therefore, we can use the egg parameters as additional information in bird systematic.

scholarly journals ISOLATION AND CHARACTERIZATION OF NEW MICROSATELLITE MARKERS FOR THE CORTÉS GEODUCK (Panopea globosa)

2016 ◽  
Vol 31 (1) ◽  
pp. 17
Author(s):  
Celia Isabel Bisbal -Pardo ◽  
Miguel Ángel Del Río -Portilla ◽  
Ana Yonori Castillo -Paéz ◽  
Axayácatl Rocha-Olivares
Keyword(s):  
Fishery Management ◽  
Genetic Research ◽  
Isolation And Characterization ◽  
Expected Heterozygosity ◽  
Tetranucleotide Repeats ◽  
Hardy Weinberg Equilibrium ◽  
Increasing Demand ◽  
Sustainable Fishery ◽  
Generation Technology

The geoduck Panopea globosa is a long-lived and large endemic infaunal clam sustaining a growing fishery in the Northwest coast of México that, in spite of its increasing demand in Asian markets very little is known about its biology. In order to provide genetic markers to support genetic research of wild populations, nine novel microsatellite loci (di-, tri-, and tetranucleotide repeats) were developed using shotgun sequencing with next generation technology (Illumina). The number of alleles per locus ranged from 3 to 16 and the observed and expected heterozygosity ranged from 0.286 to 0.650 and 0.504 to 0.906, respectively. Five loci were found to be significantly deviated from the Hardy-Weinberg equilibrium and three pairs showed evidence of linkage disequilibrium. Most loci are highly informative for population genetics and linkage analyses according to their polymorphism information content (> 0.5) and will be useful for increasing our understanding of the wild population structure and developing a sustainable fishery management. Aislamiento y caracterización de nuevos marcadores microsatelitales en la almeja generosa (Panopea globosa) La almeja generosa Panopea globosa es una especie infáunica longeva y de gran tamaño que mantiene una pesquería creciente en la costa del Noroeste de México. A pesar de su demanda creciente en los mercados asiáticos, se conoce muy poco acerca de su biología. Con la finalidad de proveer nuevos marcadores genéticos para la caracterización de poblaciones silvestres, se desarrollaron nueve marcadores microsatelitales nuevos (con patrones repetidos de di-, tri-, y tetranucleotídicos) utilizando secuenciación genómica aleatoria con tecnología de secuenciación de siguiente generación (Illumina). El número de alelos por locus varió de 3 a 16 y los valores de heterocigosidad observada y esperada variaron de 0.286 a 0.650 y 0.504 a 0.906, respectivamente. Cinco microsatelites se desvían del equilibrio de Hardy-Weinberg y tres pares de microsatélites mostraron evidencia de desequilibrio de ligamiento. La mayoría de los loci son altamente informativos para estudios poblacionales y análisis de ligamiento de acuerdo con su contenido de información de polimorfismos (> 0.5) y serán útiles para incrementar el conocimiento de la estructura genética de las poblaciones silvestres de esta almeja y para coadyuvar en su pesquería sustentable.

scholarly journals Length-weight Relationship, Growth Pattern and Condition Factor of the Silver Catfish Chrysichthys nigrodigitatus (Lacepède, 1803) from Lower River Benue, Nigeria

2018 ◽  
pp. 1-8
Author(s):  
Edem, Edem Thomas ◽  
Ofunama, Preye ◽  
Eyo, Victor `Oscar
Keyword(s):  
Population Dynamics ◽  
Growth Pattern ◽  
Sustainable Management ◽  
Condition Factor ◽  
B Value ◽  
Health Condition ◽  
Artisanal Fisheries ◽  
Allometric Growth ◽  
Silver Catfish ◽  
Weight Relationship

This study was carried out to evaluate the length-weight relationship, growth pattern and condition factor of the Silver catfish Chrysichthys nigrodigitatus from the Lower River Benue Makurdi, Nigeria. A total of 200 freshly caught specimens of C. nigrodigitatus were collected between July 2013 and September 2013 from the catches of the artisanal fisheries at landing points in Wadata Market, Makurdi. Results obtained showed that the “b” value for the males was 1.6067 while that of the females was 1.6791 and combined sexes 1.7371, indicating a negative allometric growth for this species. Correlation coefficient (r) obtained for males (0.9651), 0.9517 (females) and 0.9329 (pooled sexes) showed a positive significant relationship between length and weight of C. nigrodigitatus. Monthly mean condition factor (K), indicate that C. nigrodigitatus were in good physiological health condition. In conclusion, the baseline data on the length-weight relationship, condition factor of C. nigrodigitatus from the lower River Benue provided in this study is crucial in the sustainable management of this species in the River. Also, these findings will be useful in evaluating the population dynamics, stock and the aquaculture potential of C. nigrodigitatus for future purpose.

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