scholarly journals GROWTH OF AMUR FLATHEAD ASP PSEUDASPIUS LEPTOCEPHALUS (PALLAS, 1776)

2020 ◽  
Vol 200 ◽  
pp. 118-130 ◽  
Author(s):  
N. N. Semenchenko
Keyword(s):  
Sexual Dimorphism ◽  
Compensatory Growth ◽  
Linear Growth ◽  
The Body ◽  
Linear Growth Rate ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Geographical Variability ◽  
Weight Growth ◽  
Von Bertalanffy Growth Equation

Linear and weight growth of amur flathead asp Pseudaspius leptocephalus is described on the base of the measurements data collected on the lower Amur (from Nizhneleninskoe village to the mouth) in 2004–2018, using von Bertalanffy growth equation. Age was determined for 2240 fish including 1061 females and 528 males. The main specific features of the amur flathead asp growth are the absence of sexual dimorphism in linear growth rate and the absence of the body length differences between females and males, except of the eldest fish. However, the sexual dimorphism is found for the weight growth. A compensatory growth is noted for the amur flathead asp. The amur flathead asp parameters have some geographical variability.

BODY TEMPERATURE AFFECTS THE SHAPE OF AVIAN GROWTH CURVES

1993 ◽  
Vol 01 (04) ◽  
pp. 363-374 ◽  
Author(s):  
C. ZONNEVELD ◽  
S.A.L.M. KOOIJMAN
Keyword(s):  
Body Temperature ◽  
Growth Curve ◽  
Time Course ◽  
Growth Curves ◽  
The Body ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Gradual Development ◽  
Mathematical Equations ◽  
Von Bertalanffy Growth Equation

Growth of birds is described by a variety of mathematical equations. These equations generally lack a biological motivation. As a result, it remains unclear why growth in different species should be described by different equations. In this article, we argue that the gradual development of endothermy affects the growth of birds. Hence, differences in the growth curve may result from differences in the thermal ontogeny. We assume that birds would grow according to the von Bertalanffy growth equation, if their temperature were constant. Using the deviations from this growth curve, we reconstruct the time course of the temperature of growing birds. This reconstruction well describes data on the ontogeny of the body temperature in birds.

Age and growth studies of Gummy Shark, Mustelus antarcticus Gunther, and School Shark, Galeorhinus galeus (Linnaeus), from Souther Australian Waters

1992 ◽  
Vol 43 (5) ◽  
pp. 1241 ◽  
Author(s):  
PL Moulton ◽  
TI Walker ◽  
SR Saddlier
Keyword(s):  
South Australia ◽  
Growth Curves ◽  
Growth Patterns ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Fishing Mortality ◽  
Male And Female ◽  
Length Data ◽  
Von Bertalanffy Growth Equation ◽  
Galeorhinus Galeus

Age-length data were derived from counting stained bands on whole vertebral centra obtained from gummy shark, Mustelus antarcticus, captured by gill-nets during 1973-76 in Bass Strait and from gummy shark and school shark, Galeorhinus galeus, captured during 1986-87 in Bass Strait and waters off South Australia. The data were fitted to the von Bertalanffy growth equation after adopting the Francis reparametrization and correcting for sampling bias caused by the selectivity effects of the gill-nets of various mesh sizes used to capture the sharks. The von Bertalanffy growth curves of male and female gummy shark were significantly different, but the growth curves of male and female school shark were not. The growth curves suggest that growth rates of male and female gummy shark in Bass Strait were lower during 1986-87 than during 1973-76 and that the growth rates of male and female gummy shark and school shark in Bass Strait during 1986-87 were lower than those in South Australia at the same time. These apparent temporal and spatial differences in growth patterns of gummy shark are explained by the 'Phenomenon of Apparent Change in Growth Rate'. It is concluded that the growth curves determined for 1986-87 are distorted by the effects of a long history of high and length-selective fishing mortality and that actual growth patterns of gummy shark are better represented by the von Bertalanffy growth equation determined for shark caught in Bass Strait during 1973-76, when fishing mortality was much lower. Verification of age estimates was attempted by comparing von Bertalanffy growth curves derived from age-length data with those derived from tag release-recapture length-increment data, but these comparisons highlight the limitations of using tag data for this purpose. Although reasonable agreement was found between such growth curves for gummy shark, it appears that school shark older than 11 years cannot be aged accurately from stained whole or sectioned vertebrae. Sectioned vertebrae from a school shark recaptured 35.7 years after being tagged and released and calculated as having an age exceeding 45 years gave estimates of only 18-20 years of age.

Age, growth, and mortality of littlehead porgy, Calamus proridens, from southeast Florida coastal waters

2021 ◽  
Author(s):  
Michael L Burton ◽  
Jennifer C Potts ◽  
Ariel J Poholek ◽  
Jordan Page
Keyword(s):  
Coastal Waters ◽  
Southeastern United States ◽  
Fork Length ◽  
Total Mortality ◽  
Point Estimate ◽  
Growth Equation ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Recreational Fisheries ◽  
Von Bertalanffy Growth Equation

Sectioned otoliths were used to age littlehead porgy Calamus proridens (n = 737) from southeastern Florida recreational fisheries. Otolith sections contained easily identifiable annuli and were reliable structures for aging littlehead porgy up to 11 yrs. Opaque zones were deposited from March to June (peaking in April). Littlehead porgy ranged from 1 to 11 yrs and 220 to 385 mm total length (TL). Body size relationships were TL = 1.09 FL + 16.06 (n = 3474, r2 = 0.95), FL = 0.87 TL – 1.15 (n = 3474, r2 = 0.95), W = 4.76 × 10 −5 TL2.80 (n = 6722, r2 = 0.86), and W = 1.2 × 10−4 FL2.71 (n = 3474, r2 = 0.90), where W is total weight (g) and FL is fork length (mm). Growth was not significantly different between two discrete geographic regions of Florida, and the von Bertalanffy growth equation was Lt = 335 (1 − e−0.41 (t + 2.13)) for all areas combined. The point estimate of natural mortality was M = 0.38, while age-specific estimates of M ranged from 0.60 to 0.41 yrs−1 for ages 1–11. Littlehead porgy were fully recruited to the headboat fishery by age-3 and catch curve analysis resulted in an estimate of total mortality Z = 1.08 for ages 3–7+. This study reports first estimates of life history parameters for littlehead porgy from Atlantic waters of the southeastern United States.

Good and bad fishing areas for Haliotis laevigata: A comparison of population parameters

1995 ◽  
Vol 46 (3) ◽  
pp. 591 ◽  
Author(s):  
FE Wells ◽  
P Mulvay
Keyword(s):  
Shell Length ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Population Parameters ◽  
Southern Coast ◽  
Close Inspection ◽  
Maximum Proportion ◽  
Males And Females ◽  
Von Bertalanffy Growth Equation ◽  
Mature Size

On the southern coast of Western Australia, proportionately more reproductive specimens of greenlip abalone, H. laevigata, were of legal size in 'good' fishing areas than in 'bad' fishing areas. Sex ratios were usually 1:1. Maturation of the gonads began at a size of 70-90 mm shell length (SL) and by 100-110 mm SL all animals were reproductively mature. Size-specific fecundities were not statistically different among the four good fishing areas examined, nor were they between the two bad fishing areas, but size-specific fecundity was greater in good than in bad fishing areas. Spawning begins as soon as the animals are mature; there is no gap between apparent histological maturity and actual spawning. Gonads are quiescent in the first part of the calendar year. Development is rapid in August and September, when animals begin to reach ripe condition. A maximum proportion of ripe animals occurs in October and November, followed by spawning in December. There was no difference between growth rates of males and females in either the good or the bad fishing areas. The von Bertalanffy growth equation disclosed no difference in growth between good and bad fishing areas, but close inspection of the data suggested that slower growth did occur in the bad fishing areas. The abalone reach reproductive maturity at an age of 2.5 to 3 years and the legal size of 140 mm SL at 5 to 6 years.

Feeding ecology, growth and sexual cycle of the sand sole, Solea lascaris, along the Portuguese coast

2009 ◽  
Vol 89 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Célia M. Teixeira ◽  
Ana Pinheiro ◽  
Henrique N. Cabral
Keyword(s):  
Feeding Habits ◽  
Gonadosomatic Index ◽  
Age And Growth ◽  
Sexual Cycle ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Portuguese Coast ◽  
Important Prey ◽  
Von Bertalanffy Growth Equation ◽  
Prey Items

Sand sole, Solea lascaris, were collected along the Portuguese coast, between October 2002 and July 2003, to examine feeding habits, age and growth and sexual cycle. The most important prey items were Mysidacea, Amphipoda and Polychaeta. Differences in diet according to season and length size were found: Amphipoda were very important in diet during winter, while Echinodermata were consumed mostly in summer; smaller individuals feed on Amphipoda while larger feed on Decapoda. Age of S. lascaris was determined from sagittae otoliths. The length of fish analysed ranged from 61 mm to 340 mm. The von Bertalanffy growth equation parameters differed significantly between sexes (L∞ = 342.3 mm, k = 0.50, t0 = −0.87 and L∞ = 264.5 mm, k = 0.82, t0 = 0.13, females and males, respectively). The highest values of the gonadosomatic index were obtained in winter and spring, when the highest proportion of individuals at spawning stage was recorded.

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.

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