the study was conducted to determine the effects of turkey (meleagris gallopavo)egg weight on certain egg traits and hatching performance. a total of 178 turkey eggs comprising of three different egg weight groups below 60 g (g i), 61 to 69 g (g ii) and above 70 g (g iii) were used for this study. average egg weight (g), egg length (cm), egg breadth (cm) and egg volume (cm3) values increased wi...

A new species of hornshark is described from northwestern Australia based on six whole specimens and a single egg case. Heterodontus marshallae n. sp. was previously considered to be conspecific with H. zebra the Western Pacific. The differs in sequence its NADH2 gene, several morphological characters, case morphology key coloration features. Despite being similar between zebra, i.e., pale back...

We review morphological features of the amniote egg and embryos in a comparative phylogenetic framework, including all major clades extant vertebrates. discuss 40 characters that are relevant for an analysis evolutionary history vertebrate egg. Special attention is given to morphology cellular yolk sac, eggshell, extraembryonic membranes. Many typically assigned amniotes, such as large delayed ...

The genus Trichogramma Westwood, 1833 are important biological control agents of especially Lepidoptera pests in all around the world. These tiny wasps can’t be reliably identified owing to their small size and lack definable morphological characters. ITS2 (Internal transcribed spacer 2) sequence-based identification has been performed successfully for years parasitoids Trichogramma. use indige...

Historically, characters from early animal development have been a potentially rich source of phylogenetic information, but many traits associated with the gametes and larval stages of animals with complex life cycles are widely suspected to have evolved frequent convergent similarities. Such convergences will confound true phylogenetic relationships. We compared phylogenetic inferences based o...

The main aim of this research was to estimate the genetic and phenotypic parameters for productive and reproductive traits of Esfahan native chickens. Traits included body weights at hatch (BW1), 8 weeks of age (BW8), 12 weeks of age (BW12), and at sexual maturity (WSM)], age at sex maturity (ASM), egg number (EN), average egg weight (AEW) in the first 12 weeks of production, and egg production...