Description.
This fish is called an Australian by the name of Hump Head Maori Wrasse, which are distinguished because the face has ridges that resemble faces of Maori decoration. Strokes are cream-colored (yellow milk) that overlap each other on the nose and cheeks, then extends to the upper body and the opposite ends of the pectoral fins. Her body was plated with a bright green color and at the top throughout the entire fins brown. The length of this fish can reach 1.5 meters. And some fish can reach sizes of up to 180 kg at the age of 50 years. When young, napoleon fish looks pale with vertical stripes darker. Once mature, the color of his body became bluish green with clearer lines. Lips thickened kinds of Mick Jagger lips. The top of her head, above the eyes, be bumps ahead. Because of its hump, one was named head humped Wrasse (Humphead wrasse). His face has irregular stripes. Behind the eyes, there are two short lines are black. "Scratches" This black ornaments resembling a face Maori in New Zealand. Thus, napoleon fish also received another nickname, Maori wrasse.
Habitat.
Napoleon fish (Cheilunus undulatus) is one of the large reef fish that live in the tropics Animal life is generally similar to other reef fish that live in solitary. The divers usually find these fish swim alone in the area around the reef. And is usually very benign with divers. These fish are usually not disturbed by the activities of the divers. The habit of living alone at a certain depth makes this animal is anticipated by the divers to see or even photographing these animals. Usually the fish swim own feeding area near the reef, because the food in the form of some kind of sea urchin, mollusk and crustacean indeed many are in the area around the reef.How to eat.
Way of eating is to dismantle the dead coral with teeth the size to look for snails and worms-worms are buried. They loved to eat the shells are sized like Triton. This fish is able to break the shells of shellfish is easy for meat. Sound scour his mouth when eating, it is very attractive for divers to be likened to a group of children who were eating candy. Sometimes it is also a big fish is sharpening his teeth on rock massif (solid) that leave streaks amazing.Reproduction.
This fish has a pattern of reproduction hermaphrodite protogini. Usually the fish is born as males and females will turn into just before adulthood. So sometimes found the male dominance on the fish population and the small to medium size will be changed to the dominance of the female population while approaching mature gonads. This is indeed a unique phenomenon in nature that is one strategy mostly marine animals to preserve the lives of their populations. Here the male napoleon fish there are two types, namely those who are born as males and males remain as true until the end of life, and those who begin life as females and during the next life changed as a function of the male. Change into females usually occurs after the age of 5-10 years or less body weight of 10-15 kg. However, the change of sex and how sex change occurs is still a mystery. There are a number of factors are expected to drive change gender earlier. Namely the relationship between male Napoleon wrasse and social dominance, or in more specific terms, the size of his body. Napoleon fish females lay eggs throughout the year on the edge or the outer slope of the reef. The spawning process occurs in groups or in pairs. Laying activities in the group were dramatic. The activity began with around together slowly to form a group. When members of the group grow, they swim faster and faster, eventually increasing to form a large group meeting. At the height of the frenzy before, the whole group rose toward the surface of the sea and then lightning-fast turn and leaving a mass of eggs and sperm at the back which immediately carried away by the current. If the process is done in pairs spawn, the males prepare a nesting site on a piece of rock or stone striking. From here he attracted the attention of a passing female, which roughly gives hope. How, over potential mates he moves up and down and shook his body as he swam back. When ready to accept courtship, the female will reciprocate by giving the signal that male fish to ask for her hand. Proud female is arched to form the letter "S" while showing belly containing eggs. They then lay their eggs in a movement up and down rapidly to the surface. Laying process is short-lived in a day, depending on local conditions. In areas with strong tidal currents, spawning occurs just after the peak of high tide, the ideal situation to move the eggs to the outside reef
Conservation.
Due to the impact of overfishing for the live reef fish trade, napoleon fish declining wild population. Fishing napoleon generally use cyanide poison and damage the coral reef ecosystem. Napoleon fish is a fish that takes a long time to reach reproductive age mature. Napoleon fish become sexually mature at the age of 5 to 7 years (in sizes 40-60 cm). Fish Napoloen in Negara Malaysia, and the Philippines, it was not to be caught and traded. Australia prohibits all take and have a Napoleon fish. Indonesia allowing fishing only for research, mariculture, and fishing folk licensed. Research IUCN in 2005 in North Sulawesi, Bali, Raja Ampat, and NTT showed that habitat is under pressure (target arrest) is very high, napoleon fish is very rare, but when the fish do not become the target fish fisherman divers can still find species. The survey results show that the density of Napoleon in Kangean-Bali is only 0.04 per ha, Bunaken-Sulawesi 0, 38 per ha, Raja Ampat 0.86 per ha, NTT 0.18 per ha, Maratua 0.15 per ha, Banda 1.6 per ha. According to Sadovy in his presentation, due to the impact of overfishing for the live reef fish trade, napoleon fish susceptible (vulnerable) to extinction. Therefore, due to a drastic decline in many places causing napoleon fish put in the IUCN red list (Endangered) in 2004 and Appendix II of CITES in 2005.Thank you for reading this article. Written and posted by Bambang Sunarno. sunarnobambang86 @ gmail.
author:
https://plus.google.com/105319704331231770941.
name: Bambang Sunarno.
http://www.primadonablog.blogspot.com/2016/02/napoleon-fish.html
Date Published: 01 February 2016 at 15:13
Code : 7MHPNPADAEFW
No comments:
Post a Comment