Belly colouration, gonad carotenoid concentration and skin transparency were quantified in gravid Gobiusculus flavescens, as well as in females of five sympatric gobies where belly ornamentation has not been described. Although G. flavescens females did, indeed, have far more colourful bellies than the other species, this could only in part be explained by a high concentration of total gonad ca...

Ikan lundu (Macrones gulio) merupakan salah satu ikan ekonomis penting dan banyak dimanfaatkan oleh masyarakat sebagai bahan pangan. Kajian mengenai aspek makanan reproduksi dasar dalam pengelolaan tersebut masih sangat minim. Tujuan penelitian ini adalah mengkaji kebiasaan yang mencakup jenis makanan, kelimpahan rasio kelamin, tingkat kematangan gonad, ukuran pertama kali matang indeks fekundi...

The study on the biological aspects of Charybdis hellerii (A. Milne-Edwards, 1867) in world and Indonesia were very limited. This aims to measure sex ratio, gonad development, carapace width body weight relationship, condition factor, first size sexual maturity, fecundity. was conducted from July September 2020 western Tiworo Strait, South Konawe, SoutheastSulawsei. C. samples bycatch blue swim...

The round goby (Neogobius melanostomus Pallas 1811) is a non-native species in the Gulf of Gdańsk. The aim of this article is to assess the absolute fecundity and attempt to describe the gonad development cycle of round goby specimens from the Gulf of Gdańsk. The stages of gonad development were classified according to the modified Nikolski (1963) scale for perciformes, which was adapted for th...

In most organisms, primordial germ cells are set aside from the cells of the body early in development. To form an embryonic gonad, germ cells often have to migrate along complex routes through and along diverse tissues until they reach the somatic part of the gonad. Recent advances have been made in the genetic analysis of these early stages of germ line development. Here we review findings fr...

Ikan lundu (Macrones gulio) merupakan salah satu ikan ekonomis penting dan banyak dimanfaatkan oleh masyarakat sebagai bahan pangan. Kajian mengenai aspek makanan reproduksi dasar dalam pengelolaan tersebut masih sangat minim. Tujuan penelitian ini adalah mengkaji kebiasaan yang mencakup jenis makanan, kelimpahan rasio kelamin, tingkat kematangan gonad, ukuran pertama kali matang indeks fekundi...

Penelitian ini bertujuan untuk melihat bagaimana efek laserpunktur pada ikan lele jantan. Dengan asumsi bahwa proses percepatan kematangan gonad/rematurasi jantan, dapat memperpendek waktu pematangan secara alamiah sebagai indikator bereproduksi. eksperimental terdiri dari dua perlakuan yaitu kontrol dan laserpunktur. Parameter yang diamati dalam penelitian adalah profil gonad (Clarias sp) 1 bu...

Two experiments were conducted to determine if exposure of prepubertal heifers to supplemental lighting hastens the onset of puberty. In Exp. 1, 16 heifers were paired according to birth date (April 21 to July 4) and assigned randomly to exposure to either 18 h light/d (L) or natural photoperiods (N) from 22 wk of age until puberty. Twenty-two heifers in Exp. 2, born between February 27 and Mar...