scholarly journals Growth parameters of Poecilia latipinna (Lesueur, 1821) (Actinopterygii, Poeciilidae) – an introduced species in brackish water of Wadi Al-Bahayes (Oman)

2021 ◽  
Vol 50 (3) ◽  
pp. 269-277
Author(s):  
Salim Serkan Güçlü ◽  
Saud M. Al Jufaili ◽  
Laith A. Jawad
Keyword(s):  
Growth Performance ◽  
Alien Species ◽  
Condition Factor ◽  
Growth Parameters ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Poecilia Latipinna ◽  
Weight Relationship ◽  
The Mean ◽  
Von Bertalanffy Growth Equation

Abstract This work is one of the first studies on the growth of Poecilia latipinna outside its natural habitat. The objective of our study was to investigate the growth parameters of the population of P. latipinna, which is an alien species in Oman (Wadi Al-Bahayes). The population structure of P. latipinna in Wadi Al-Bahayes (Oman; 23°40′47″N; 58°11′36″E) was studied in June and August 2020, using 124 fish. In the course of this study, the number of individuals of each sex, age, weight and size composition were determined. In addition, the total length–weight relationship (LRW) was calculated, as well as the von Bertalanffy growth equation. The mean growth performance (phi prime) and the condition factor were calculated. Males accounted for 37.10% and females for 62.90% of the population. The length–weight relationship and the von Bertalanffy growth equation were W = 0.0214 × L 2.7889 R2 = 0.9212, Lt = 11.46 (1 − e −0.127 (t + 2.71)) for males and Lt = 14.51 (1 − e−0.072 (t + 3.98)) for females. The mean growth performance and the condition factor were calculated as 1.22 for males and 1.18 for females and 1.54 for all specimens. The study shows that the population of the species is characterized by a wide age range. Consequently, monitoring of this alien species is highly recommended.

scholarly journals Several Growth Characteristics of an Invasive Cyprinid Fish (Carassius gibelio Bloch, 1782)

2013 ◽  
Vol 5 (2) ◽  
pp. 133-138 ◽  
Author(s):  
Sait BULUT ◽  
Ramazan MERT ◽  
Beklan ALGAN ◽  
Musa ÖZBEK ◽  
Bülent ÜNAL ◽  
...  
Keyword(s):  
Condition Factor ◽  
Growth Parameters ◽  
Gibel Carp ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Age Composition ◽  
Carassius Gibelio ◽  
The Mean ◽  
Von Bertalanffy Growth Equation ◽  
Index Value

Age composition, length-weight relationships, growth, and condition factors of the gibel carp (Carassius gibelio Bloch, 1782) were determined using specimens collected from Seyitler Reservoir between July 2005 to June 2006. A total of 149 gibel carp were observed and examined. The age composition of the samples ranged between I and VII years of age. It has been determined than 82.55% of the obtained samples are comprised of females, 16.11% is comprised of males and 1.34% is comprised of immature. The population is dominated by females able to reproduce gynogenetically. The mean fork lengths and mean weights of the population were 14.8-32.5 cm and 43.1-807.3 g respectively. The length-weight relation were calculated as W = 0.0696 L2.132, r=0.838 for females, for males W = 0.2942 L2.6417 r=0.784 and W = 0.0274 L2.9382, r=0.813 for all samples. The mean Fulton Condition Factor was calculated as 2.342 for females, 2.064 for males and 2.276 for all samples. Age-length and age-weight relations were determined according to von Bertalanffy growth equation formula. Growth parameters of the population were Lt = 48.09 [1-e-0.093(t+0.29)], and Wt=2323.62 [1-e-0.093(t+0.29)]2.9382. The growth performance index value (Ø´) was computed as 5.37 for all specimens.

scholarly journals Length weight relationship, growth parameter, and condition factor of caroun croaker Johnius carouna (Cuvier, 1830) in the Southern waters of Java

2019 ◽  
Vol 19 (2) ◽  
pp. 231 ◽  
Author(s):  
Ria Faizah ◽  
Regi Fiji Anggawangsa
Keyword(s):  
Condition Factor ◽  
Growth Parameter ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Length Frequency ◽  
The South ◽  
Growth Coefficient ◽  
Weight Relationship ◽  
Central Java ◽  
Von Bertalanffy Growth Equation

Caroun croaker (Johnius carouna) is one of demersal fishes which are commonly caught in the south of Java waters. This fish captured by trammel net, gillnet, danish seine and mini trawl. This study aims to determine length and weight relationship, growth parameter, length frequency distribution and condition factors of croaker fish caught in the south of Java waters.   This study was conducted from January-December 2015 at the Cilacap Ocean Fisheries Port, Central Java. Data collected was total length (TL in mm) and weight (W in g) of caroun croacker fish.  A total of 2141 of Caroun croaker was caught by mini trawl during the sampling periods. The result showed that the size of croaker fish caught by mini trawl ranged between 85-225 mm with an average was 143.7 mm. Length and weight relationship expressed by equation of W = 0.0062 TL3.2889 ( R2 = 0.9443). The growth pattern of croaker fish was allometric positive. The Von Bertalanffy growth equation of caroun croacker fish in south of Java waters was Lt =155 (1 - e -0.9(t+0.2127)) with the asymptotic length (L∞) =155  mm, growth coefficient (K) = 0.9 per year and the theoretical age croaker fish that was equal to (t0) = - 0,2127.

Effect of Individual Variability on the von Bertalanffy Growth Equation

1980 ◽  
Vol 37 (2) ◽  
pp. 241-247 ◽  
Author(s):  
K. J. Sainsbury
Keyword(s):  
Growth Models ◽  
Growth Increment ◽  
Mean Value ◽  
Individual Variability ◽  
Age And Growth ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Von Bertalanffy Model ◽  
The Mean ◽  
Von Bertalanffy Growth Equation

The growth in length of a group of animals is examined. Each animal is assumed to grow according to the von Bertalanffy model with fixed parameters, but these parameters are allowed to differ between individuals. Equations governing the mean and variance of length at given age and growth increment at given length are provided, and their implications discussed. Results indicate that the traditional growth equation is likely to result in an underestimate of the mean value of K when either length at age or growth increment data are analyzed. This problem does not appear serious when using length at age data. However, the problems of interpretation are more serious in the case of growth increment data where serious overestimates of the reconstructed mean length at age can result. A thorough analysis of growth cannot be made for a population exhibiting individual variability in L∞ and K from growth increment data alone. In particular a nonlinear relationship between growth increment and initial length does not necessarily imply that the von Bertalanffy model is inappropriate to the species in question. A topic urgently in need of examination is the form of the joint distribution of K and L∞ in animal populations.Key words: von Bertalanffy, growth models

The population structure and biology of the ocean quahog,Arctica islandica, in Belfast Lough, Northern Ireland

2011 ◽  
Vol 92 (3) ◽  
pp. 539-546 ◽  
Author(s):  
I.D. Ridgway ◽  
C.A. Richardson ◽  
J.D. Scourse ◽  
P.G. Butler ◽  
D.J. Reynolds
Keyword(s):  
Northern Ireland ◽  
Growth Performance ◽  
Distribution Density ◽  
Size Structure ◽  
Growth Parameters ◽  
Growth Equation ◽  
Arctica Islandica ◽  
Successful Recruitment ◽  
Von Bertalanffy Growth Equation ◽  
Belfast Lough

The spatial distribution, density, growth rate, longevity, mortality and recruitment patterns of the long-lived clamArctica islandicain Belfast Lough, Northern Ireland, UK are described. TheA. islandicapopulation at Belfast Lough appears to be restricted to a small area at the mouth of the Lough. Additional searches for specimens further into the Lough and into deeper waters found no evidence of a larger more widespread population and we report population densities of 4.5 individuals m−2. The ages of the clams were determined from the number of internal annual growth lines in acetate peel replicas of shell sections. The population growth curve was fitted using the Von Bertalanffy growth equation: Lt = 93.7 mm (1−e−0.03(t–1.25)). Based on catch curve analysis, the Belfast Lough population has an estimated longevity of 220 years and a natural mortality rate of 0.02. We compare growth characteristics and life history traits in this population with other analogousA. islandicapopulations. The overall growth performance and the phi-prime index were used to compare growth parameters with data from the literature and we observed no significant relationship between the growth performance indices and longevity or latitude. Analysis of the age-structure and reconstructed dates of settlement indicate that this population has experienced almost continual recruitment over the last century with a gap in successful recruitment into the population 90–100 years ago and another 140–150 years ago. The size-structure revealed a scarcity of small individuals which we believe may be an artefact of the dredge sampling process.

scholarly journals The Variation of Several Biological Characteristics of the Chub, Squalius cephalus (L., 1758), in the Orenler Dam Lake, Northwest Anatolia, Turkey

2012 ◽  
Vol 4 (3) ◽  
pp. 27-32 ◽  
Author(s):  
Sait BULUT ◽  
Ramazan MERT ◽  
Muhsin KONUK ◽  
Beklan ALGAN ◽  
Ali ALAŞ ◽  
...  
Keyword(s):  
Condition Factor ◽  
Growth Parameters ◽  
Fork Length ◽  
Biological Characteristics ◽  
Von Bertalanffy ◽  
Calculated Length ◽  
Weight Relationship ◽  
Average Condition ◽  
Squalius Cephalus

In the present study, several growth parameters of 338 Squalius cephalus (L., 1758) specimens collected from the Orenler dam lake (Turkey) between July 2005 and June 2006 were studied. The population comprised 50.74% males, 46.29% females, and 2.97% males+females. In the examined samples, the age of females and males ranged from I to VII and I to VI, respectively. The fork length and weight of females were 14.7-38.0 cm and 40.68-27.0 g, respectively; these values were 16.3-33.7 cm and 57.7-560.0 g, respectively, for males. The age-length and age-weight relationships at time t were calculated by the von Bertalanffy equation for females, and the following results were obtained: Lt = 37.12[1–e–0.36(t–(–0.96))], Wt = 775.6[1–e–0.36(t–(–0.96))]3.27, Lt = 43.59[1–e–0.3356(t–(–0.719))], and Wt = 1123.2[1–e–0.3356(t–(–0.719))]3.08. The calculated length-weight relationship was W = 0.36L3.27 for females and W = 0.03356L3.08 for males. The average condition factor was 1.412 for females and 1.284 for males. Consequently, in the Orenler dam lake, S. cephalus grows very well according to the study’s results.

scholarly journals Growth characteristics of the European hake, Merluccius merluccius (Linnaeus, 1758), inhabiting northeastern Mediterranean

2020 ◽  
Vol 61 (1) ◽  
pp. 79-88
Author(s):  
Hulya Girgin ◽  
Nuri Başusta
Keyword(s):  
Growth Performance ◽  
Condition Factor ◽  
Growth Parameters ◽  
Age Determination ◽  
Growth Characteristics ◽  
Von Bertalanffy ◽  
Merluccius Merluccius ◽  
Fishing Season ◽  
Male Ratio ◽  
European Hake

In this study, the age and some growth characteristics of the European hake, Merluccius merluccius, from the northeastern Mediterranean were examined during 2015-2016 fishing season. A total of 661 European hake ranging from 9.8 to 51.6 cm in total length was captured by commercial trawler. Female/male ratio was 1/1.15. Age determination was conducted using the sagittal otoliths. Ages of examined individuals ranged from 1 to 7 years. The von Bertalanffy growth parameters fitted to the average measured total lengths-at-age for each sex separately and estimated as L∞= 93.98 cm, k= 0.114 year-1, t0= -0.597 year for females, as L∞= 77.65 cm , k= 0.153 year-1, t0= -0.343 year for males and as L∞= 84.44 cm, k= 0.135 year-1, t0= -0.469 year for combined sexes. The growth performance value (Φ) of the European hake population was computed as 2.98 for combined sexes. Mean condition factor value for population was 0.654±0.021; the highest condition factor was found as 1.01 in fish at age 7.

Age, growth and condition of the Perth herring, Nematolosa vlaminghi (Munro) (Dorosomatinae), in the Swan Estuary, south-western Australia

1986 ◽  
Vol 37 (1) ◽  
pp. 105 ◽  
Author(s):  
CF Chubb ◽  
IC Potter
Keyword(s):  
Western Australia ◽  
Condition Factor ◽  
First Year ◽  
Growth Equation ◽  
Age Classes ◽  
Beach Seine ◽  
Gill Net ◽  
The Mean ◽  
Von Bertalanffy Growth Equation ◽  
First Year Of Life

The size, age and condition of Perth herring, N. vlaminghi, in the Swan Estuary in south-western Australia, were investigated between February 1977 and January 1980 using samples collected by beach seine and gill net. An examination of scale annuli showed that the population consisted predominantly of age classes 0+ to 4 +. By the end of their first year of life, Perth herring had reached mean lengths of 105 mm (= 9.8 g) in 1977, 105 mm (= 10.0 g) in 1978, and 95 mm (= 7.9 g) in 1979. The von Bertalanffy growth equation was calculated to be Lt = 381{1 -exp[- O.17(t + 0.6S)]}. During winter, the growth rate declined markedly and the mean condition factor fell to its lowest level. Perth herring started to make a major contribution to the important commercial fishery for this species during their third year of life.

scholarly journals DINAMIKA POPULASI DAN LAJU PEMANFAATAN IKAN BANDENG (Chanos chanos) DI WADUK SEMPOR, JAWA TENGAH

2018 ◽  
Vol 10 (1) ◽  
pp. 29
Author(s):  
Aisyah Aisyah Aisyah ◽  
Chairulwan Umar ◽  
Setiya Triharyuni ◽  
Husnah Husnah
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Logistic Model ◽  
Condition Factor ◽  
Growth Parameters ◽  
Total Mortality ◽  
Von Bertalanffy ◽  
Chanos Chanos ◽  
Weight Relationship ◽  
Exploitation Rate

Ikan bandeng (Chanos chanos) di Waduk Sempor diintroduksi pada tahun 2014 melalui penerapan teknologi perikanan tangkap berbasis budidaya (Culture Based Fisheries, CBF). Penelitian ini bertujuan untuk mengevaluasi pertumbuhan bandeng melalui pengamatan parameter pertumbuhan dan biologi populasinya di Waduk Sempor, Jawa Tengah. Data yang dianalisis diperoleh dari hasil pencatatan enumerator periode September 2014 sampai– Desember 2015. Kajian dinamika populasi ikan bandeng yang meliputi laju pertumbuhan, laju kematian dan tingkat pemanfaatan mengacu pada persamaan Von Bertalanffy dan turunannya. Aspek biologi meliputi hubungan panjang berat mengacu pada model logistik, serta faktor kondisi, keseluruhan analisis dilakukan secara manual dengan program excel 2007. Hasil penelitian menunjukan bahwa parameter pertumbuhan panjang-asimtotik L∞ = 55,97 cm TL dan K= 0,38 per tahun. Laju kematian total (Z) = 1,17 per tahun, kematian alami (M) = 0,56 per tahun, kematian akibat penangkapan (F) = 0,61 per tahun serta laju eksploitasi (E) = 0,5. Pertumbuhan populasi dan laju pemanfaatan menunjukkan bahwa bandeng sudah dimanfaatkan secara optimal oleh masyarakat di sekitar Waduk Sempor.  Milkfish (Chanos chanos) was introduced at 2014 in Sempor Reservoir through culture based fisheries (CBF) technology. This study aims to evaluate population growth of the milkfish in Sempor Reservoir. Data were collected from September 2015 to December 2016, and were analyzed using excel 2007 programe manually. Analysis of length-weight relationship is refers to logistic model, population dynamic like growth rate, mortality and mortality rate are refers to Von Bertalanffy and differentiate of it. Biology of population like length-weight relationship are refers to logistic model, and condition factor. The results showed that growth parameters were L∞ = 55.97 cm TL and K = 0.38 year-1. Total mortality (Z) = 1.17 year-1; M = 0.56 year-1; F = 0.61 year-1; and E=0.5. The growth rate and exploitation rate of Milkfish (Chanos chanos) in Sempor Reservoir has been utilized optimally.

scholarly journals Growth and mortality estimates of Sardinella brasiliensis in the southeastern Brazilian Bight

1994 ◽  
Vol 42 (1-2) ◽  
pp. 113-127 ◽  
Author(s):  
Maria Cristina Cergole ◽  
Helio Valentini
Keyword(s):  
Growth Parameters ◽  
Total Mortality ◽  
Entire Period ◽  
Brazilian Coast ◽  
Growth Equation ◽  
Natural Mortality ◽  
Length Data ◽  
The Mean ◽  
The Difference ◽  
Von Bertalanffy Growth Equation

Length frequency analisys were applied for sardine data collected from commercial catches throughout the southeastern Brazilian coast in 1977-1987. Age/length keys were obtained by otolith ring countings and utilized to transform length into age composition. Growth parameters were estimated by the von Bertalanffy growth equation using age and length data for each year and for all the period of investigation. The mean growth parameters for the entire period were estimated as L∞ = 271 mm and K= 0.59 year-1. Instantaneous total mortality (Z) coefficients per year were estimated using catch curves and methods based on the mean length of the fish caught. Total mortality rate for the entire period was obtained through the average of the annual values. Natural mortality (M) was estimated using the Paul/s empirical equation (1980a), and fishing mortality (F) by the difference between total and natural mortality values.The results were Z = 3.6 year-1; M = 0.96 year-1; and F= 2.6 year-1.

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