The Nassau grouper (Epinephelus striatus) is one of the large number of perciform fishes in the family Serranidae commonly referred to as groupers. It is the. Overall body color of Epinephelus striatus varies from tawny to pinkish red, with five dark vertical bars. The third and fourth bars branch above. Epinephelus striatus. These large, oblong fish can change both color and gender , and live at the rocky reef bottom of tropical Western Atlantic.
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Superimposed on this base color are a number of lighter stripes, darker spots, bars, and patterns, including black spots below and behind the eye, and a forked stripe on the top of the head. After spawning as a female for one or more years, the grouper changes sex, functioning as a male during future spawning events.
Their range stretches as far west as the Yucatan Peninsula in Mexico.
Hook and line as well as traps are the main methods used to capture the Nassau grouper. Retrieved April 17, Given its size and habitat, Nassau groupers have few epinepyelus predators. Contrary to previous opinion, evidence now suggests that individual Nassau groupers occur as separate sexes and do not change from female to male, as many other groupers do 5.
Epinephelus striatus, Nassau grouper : fisheries, gamefish, aquarium
Observations of a Nassau grouper, Epinephelus striatus, spawning aggregation site in Little Cayman, Cayman Islands, including multi-species spawning information. Nassau groupers aggregate to specific spawning sites on the full moon during December and January.
Juveniles and smaller young adults prey on crustaceans and bivalves, while older Nassau groupers mainly eat fish, lobsters, and gastropods. Pelvic fins are shorter than the pectoral fins, with the insertion point located below or behind the ventral terminus of the pectoral fin base.
Nassau groupers do not invest energy in their offspring post-fertilization. For example, when two Nassau groupers of different sizes meet, their body color may change in response to aggression.
Estimates of some properties based on models Preferred temperature Ref. Nassau groupers can also be found in beds of sea grasses and prefer areas of high visibility. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Groupers are frequent visitors to wrasse cleaning stations. Groupers are usually found towards the bottom of the water column where they feed on a variety of prey, using their cryptic appearance to ambush fish such as parrotfish and wrasse 4.
There are five vertical brown bars, a brown saddle near the base of the tail and distinctive facial markings 5. Ecotourism implies dtriatus there are existing programs that profit from the appreciation of natural areas or animals. It is difficult to distinguish different species of grouper larvae from one another, since what information is known about egg and larval development is general.
Nassau groupers can grow up to 1.
dpinephelus The current population is estimated to be more than 10, mature individuals, but is thought to be decreasing. At mm in length, the juvenile Nassau groupers move out from vegetated areas to surrounding patch reefs.
Environmental Biology of Fishes Historically, the same sites are used and the triggers that cause individuals to arrive appear to be related to the full moon and the temperature of the water 5.
The genus name comes from the Greek Epinephelus meaning clouded over while striatus is Latin, referring to the striped color pattern. The larvae are characterized by kite-shaped bodies and elongated second dorsal spines.
Third and fourth vertical bars branch above lateral line forming a W-shaped mark.
Share on Facebook Tweet Send email. English language common names include Nassau grouper, day grouper, grouper, hamlet, rockfish, sweet lip, and epinephelks grouper.
Emperor angelfish Pomacanthus imperator.
Nassau groupers are considered a migratory species in the Gulf of Mexico and are rarely seen there. Classification Kingdom Animalia animals Animalia: They display five dark, unevenly spaced bars across their striatux, and a distinctive bar runs from the snout to the dorsal fin.
The Nassau grouper Epinephelus striatus is one of the large number of perciform fishes in the family Serranidae commonly referred to as groupers. Caudal fin is rounded in juveniles, convex in adults.
IUCN Red List of Threatened Species
Caudal fin rounded in juveniles. Habitat This grouper is common on offshore rocky bottoms and coral reefs throughout the Caribbean region. Nassau groupers are found in shallow waters up to 90 metres deep, associated with reef or rocky substrate 4. However, its numbers have epjnephelus sharply reduced by overfishing in recent years, and it is a slow breeder.
The Nassau grouper has been heavily fished and vulnerable to overfishing. Biology Nassau grouper residing among the corals.
Alphestes afer Alphestes immaculatus Alphestes multiguttatus. The sandbar shark Carcharhinus plumbeus and the great hammerhead shark Sphyrna mokarran are also known to feed on epine;helus.
They grow up to 4 feet long and eat mostly crustaceans and other smaller fish by opening their mouths and inhaling them.
In the Cayman Islands, fishing in the spawning holes of the grouper has been banned until the end of