The inserted pictures belong to Omani abalone, Haliotis mariae. In the absence of external signs of sexual dimorphism for the shell structure, the sexing of abalone cannot be done based on the external differentiation and is only determined through the visual inspection of gonads which could be seen if the foot and mantle are forced …
Tag: sexual dimorphism
Permanent link to this article: https://fishconsult.org/?p=15107
May 16 2014
Application of genetics in aquaculture and fishery practices (Updated 2014 version)
This lecture was delivered in the Fish Culture Development training course which started on April 2014. This course is organized by the Egyptian International Centre for Agriculture “EICA” and supported by Japan International Cooperation Agency “JICA”. The course hosts 16 African trainees from 11 African countries. Even though the lecture focused on the application side …
Permanent link to this article: https://fishconsult.org/?p=10876
Mar 05 2014
Giant hermit crab, Petrochirus diogenes (Distribution – Feeding – reproduction – associates)
Photo credit: Glenda Vélez Calabria (Colombia) Technical review: Abdel Rahman El Gamal This photo was taken in mundo marino and te mostramos lo que pasa en el fondo, Colombia General: This species is a large marine hermit crab which was originally described as Cancer diogenes. These crabs which are red in color may show sexual dimorphism in regard …
Permanent link to this article: https://fishconsult.org/?p=10476
Nov 08 2013
Applications of genetics in aquaculture and fishery practices (Updated 2013 version)
This lecture was delivered in “Fish Culture Development” training course during October 2013. This 10-week international training course is annually hosted by the Egyptian International Centre for Agriculture (EICA). While the lecture started with an introductory component on genetics, the focus has been placed on breeding programs. The following sub-titles are addressed in the lecture: …
Permanent link to this article: https://fishconsult.org/?p=9783
Jul 19 2013
Red Sea fishes, Longnose hawkfish (Oxycirrhites typus)
Photo credit: To the gentleman who I met once and it is shame to miss his name (thanks friend for the collection you shared with me years ago and forgive my weak memory) Review: Abdel Rahman El Gamal Introduction: The Longnose hawkfish, Oxycirrhites typus is a species that belongs to hawkfish family Cirrhitidae. Longnose hawkfish reach about 12 …
Permanent link to this article: https://fishconsult.org/?p=8417