Estimation of growth curve characteristics of Hemsin male and female sheep

Abstract

In the present study, we examined the suitability of seven asymptotic nonlinear models to describe body weight growth of Hemsin male and female sheep from birth to 36 months of age and, using the selected functions, to provide a biological interpretation for this growth. The weight-age data for this study were obtained from records of 108 Hemsin female and male sheep held in variety breeder flocks of Artvin province in Turkey. The sheep records were collected between 2008 and 2010 with measurements taken at birth, 2nd, 3rd, 6th, 12th, 18th, 24th, and 36th months of age. Body weight-age data from Hemsin sheep were used to obtain a growth pattern for sheep, with the use of Negative exponential, Brody, Gompertz, Logistic, Bertalanffy, Richards, and Janoschek nonlinear functions. Comparisons between these functions were based on coefficients of determination and residual squared error. The R 2 values of the models ranged from 0.971 to 0.989 for males and from 0.951 to 0.991 for males. In both sexes, the Brody, Richards, and Janoschek models, with equal R 2 as 0.99, were superior to the others. However, the Brody was precise on its parameters and easy to interpret than Richards and Janoschek functions.

Farming systems in sheep rearing: Impact on growth and reproductive performance, nutrient digestibility, disease incidence and heat stress indices

“…The maturation rates were higher for female sheep compared to males. In this view, these results share similarities with the studies in Hemsin [ 42 ] and Horro [ 44 ] sheep breeds.…”

“…The male lambs had higher estimated mature weight than female lambs, which may be explained by slower maturity rate [ 39 ]. Similar phenomenon in male lambs were found in Kordi [ 39 ], Mehraban [ 40 ], Shall [ 41 ], and Hemsin [ 42 ] sheep breeds. The integration constant (B) did not show any clear interpretation, as mentioned by Malhado et al (2009) [ 43 ].…”

Definición de curvas de crecimiento con modelos no lineales en borregas de siete razas con registro de pureza en México

“…El modelo VBE se caracteriza por una curva sigmoide (Figura 2), siendo el punto de inflexión donde la TAC cambia de un proceso de aceleración a una fase de desaceleración; mientras que los modelos BRO y MIT describen una curva de crecimiento continua y sin punto de inflexión (Figura 1), y la TAC como proporción del PAD es constante a través del tiempo (3,16) . En estudios similares, Bahreini et al (5) en ovinos Baluchi, Kopuzlu et al (17) en borregas Hemsin, y Gbangboche et al (18) en ovinos West African Dwarf reportaron que el modelo BRO fue de mejor ajuste para describir el crecimiento; así mismo, analizando el crecimiento de ovinos Morada Nova (4) , publicaron que los modelos Meloun I y Meloun III, con patrones de crecimiento similares a los modelos BRO y MIT del presente estudio, fueron los de mejor ajuste. Por otro lado, Lupi et al (9) en borregas Segureñas y Topal et al (19) en ovinos Awassi, reportaron que el modelo VBE fue el de mejor ajuste.…”

The growth of domestic goats and sheep: A meta study with Bertalanffy-Pütter models

“…For the sheep, S01 were Awassi from Turkey ( Bilgin et al., 2004 ), S02-S06 Baluchi from Pakistan and Turkey ( Iqbal et al., 2019 ; Tariq et al., 2013 ), S07 Blackbelly from Mexico (Jimenez-Severiano et al., 2010 ), S08 Daglic from Turkey ( Akbas, Taskin, & Demirören, 1999 ), S09 Deccani from India ( Bangar, Lawar, Nimase & Nimbalkar, 2018 ), S10 Dorper from Brazil ( Malhado, Carneiro, Affonso, Souza & Sarmento, 2009 ), S11-S12 Hemsin from Turkey ( Kopuzlu, Sezgin, Esenbuga & Bilgin, 2014 ), S13-S14 Ile-de France from Brazil ( Falcao et al, 2015 ; Moreira et al., 2016 ), S15 Karachai from Russia (Semyonov & Selkin, 1989 ), S16-S17 Karagouniko from Greece ( Goliomytis, Orfanos, Panopoulou & Rogdakis, 2006 ; Teleken et al., 2017 ), S18-S34 different varieties and crossbreds of colored and white Karaman from Turkey ( Aytekin, Zulkadir, Keskin & Boztepe, 2010 ; Bilgin et al., 2004 ; Daskiran, Koncagul & Bingol, 2010 ; Gökda, Ulker, Karakuş, & Firat, 2006 ; Keskin, Dağ, Sariyel & Gökmen, 2009 ; Kucuk & Eyduran, 2009 ; Kum, Karakus & Ozdemir, 2010 ), S35 Kivircik from Turkey ( Abbas et al., 1999 ), S36 Kordi from Iran ( Mohammadi, Mokhtari, Saghi & Shahdadi, 2019 ), S37 Mehraban from Iran (Bathaei & Leroy, 1998 ), S38 Morada Nova from Brazil ( Paz et al., 2018 ), S39-S40 Ouled Djellal from Algeria ( Zidane, Niar & Ababou, 2015 ), S41-S42 Romney from New Zealand ( Hancock, Oliver, McLean, Jaquiery & Bloomfield, 2011 ), S43-S45 Santa Ines from Brazil ( Santos et al., 2014 ; Sarmento et al., 2006 ; Silva et al., 2012 ), S46-S47 Scottish Blackface from the UK ( Friggens, Shanks, Kyriazakis, Oldham & McClelland, 1997 ), S48-S49 Segurena from Spain Lupi, Nogales, León, Barba Capote and Delgado, (2015) , S50-S51 Shetland from the UK ( Friggens et al., 1997 ), S52 Sonadi from India ( Gautam, Kumar, Waiz & Nagda, 2018 ), S53-S54 Spanish Merino from Spain ( …”