This 2-slide bite presents the squash technique and its use in sex determination in fish. Examples are given such as sex reversal and progeny testing in tilapia. The same is true in situations whereas the sex of juvenile fish of more species cannot be determined based on fish morphology. The bite also includes the procedures …
Category: Experts
Describe an expert in the Fish Consulting Group
Permanent link to this article: https://fishconsult.org/?p=7428
Nov 10 2012
Reef stonefish, Synanceia verrucosa (introduction, distribution, feeding habits, reproduction, commercial value)- video
This video was taken during June 2012 at the Sea World, California, USA Review: Abdel Rahman El Gamal (Founder of the website and video channel) Introduction: The stonefish, Synanceia verrucosa which belongs to the family Synanceiidae is a fish species, which is widely known as the reef stonefish, rockfish or “dornorn”. The average length of most stonefish …
Permanent link to this article: https://fishconsult.org/?p=7106
Nov 09 2012
Initial farming of Indian white prawn, Penaeus Indicus in Egypt
Photo credit: Adel Mansour and Hussien Mansour (Egypt) Review: Abdel Rahman El Gamal Even though the Initial attempts of shrimp farming in Egypt goes back to about 10 years back, the productivity per unit area was never satisfactory due to variety of reasons. The farmed species is considered among …
Permanent link to this article: https://fishconsult.org/?p=7094
Oct 31 2012
Size grading of harvested whiteleg shrimp (Liptopenaeus vannamei) in Thailand
Credit: Worawut Koedprang (Thailand) Description: Worawut Koedprang and Abdel Rahman El Gamal Two of the three photos show the hand grading of heads-on harvested whiteleg shrimp, Liptopenaeus vannamei. It is obvious that women contribute significantly to the grading process which takes place after cold bathing. In order to …
Permanent link to this article: https://fishconsult.org/?p=6794
Oct 26 2012
Reproductive performance and considerations of clown anemonefish, Amphiprion ocellaris (Thailand)
Credit: Worawut Koedprang (Thailand) The first photo shows a pair of clown anemone fish brooder “or clownfish” (Amphiprion ocellaris) while inhabiting a sea anemone. This species is among reef dwellers. The larger fish specimen shown in the photo is a female. The clown anemone fish are monogamous as a brooder mates with the same spouse except in case …
Permanent link to this article: https://fishconsult.org/?p=6753
Sep 11 2012
Ontogenesis of main organs in whiteleg shrimp, Litopenaeus vannamei
Credit: Faiz Muhammad (Pakistan) This PDF file represents the Ontogenesis of the main organs in whiteleg shrimp, Litopenaeus vannamei. The whole research program was conducted in College of Marine Life Sciences, Ocean University of China. Ontogenesis in whiteleg shrimp
Permanent link to this article: https://fishconsult.org/?p=5624
Sep 06 2012
Predation efficiency of Nile perch, Lates niloticus
This 2-slide information bite addresses the predation efficiency of Nile perch in relation to its characteristics especially its mouth and gapes. The bite touched the case study of the introduction of Nile perch into Lake Victoria and the impacts of the introduction. The predator-prey relationship has been addressed in this bite which is supported by …
Permanent link to this article: https://fishconsult.org/?p=5506
Aug 28 2012
Rotifer enrichment in marine hatcheries
Rotifers by itself do not possess high nutritional value. However, because of their appropriate sizes to the small larvae such as those of marine fish, rotifers have been successfully used in marine hatcheries after been adequately enriched to meet the nutritional demands of target larvae for proper neural development. Brachionus plicatilis is a common rotifer in …
Permanent link to this article: https://fishconsult.org/?p=5464
Aug 15 2012
Blackfooted Penguins, Spheniscus demersus (Breeding, climatic adaptation, threats and conservation measures) – Video
This video was taken at Monterey Bay Aquarium, California, USA in June 2012 Breeding: The African Penguin reaches breeding maturity in about four years. They form nesting colonies, with pairs returning to the breeding site year after year. The breeding nests are usually found on coastal islands, where pairs construct their nests from their hardened excrements …
Permanent link to this article: https://fishconsult.org/?p=5184
Aug 14 2012
Black-footed penguins, Spheniscus demersus (Description, distribution and feeding habits) – Video
This video was taken at Monterey Bay Aquarium, California, USA in June 2012 The black-footed penguins or African penguins, Spheniscus demersus are water birds which belong to the family Spheniscidae Description: Black-footed penguins when fully developed grow to 60-70 centimeters tall and weigh between 2 and 5 kilograms. These penguins have black backs, faces, wings, feet and …
Permanent link to this article: https://fishconsult.org/?p=5177