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Gulf menhaden | |
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Gulf menhaden (Brevoortia patronus), captured in Galveston Bay, TX | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Clupeiformes |
Family: | Alosidae |
Genus: | Brevoortia |
Species: | B. patronus |
Binomial name | |
Brevoortia patronus Goode, 1878 | |
The Gulf menhaden (Brevoortia patronus) is a small marine filter-feeding fish belonging to the family Alosidae. The range of Gulf menhaden encompasses the entirety of the Gulf of Mexico nearshore waters, with the exception of the extreme eastern Yucatan and western Cuba. [2] Evidence from morphology [3] and DNA analyses [4] suggest that the Gulf menhaden is the Gulf of Mexico complement to the Atlantic menhaden (Brevoortia tyrannus). Both species support large commercial reduction fisheries, [5] with Gulf menhaden supporting the second largest fishery, by weight, in the United States. [6]
The Gulf menhaden resides throughout the Gulf of Mexico, but its distribution is patchy. The center of distribution of the species appears to be the northwest/northcentral Gulf, [2] particularly in Louisiana and Texas where populations are very large and numerous. In the southern Gulf of Mexico, the range of Gulf menhaden overlaps that of the closely related finescale menhaden (Brevoortia gunteri), [7] and there is evidence for resource partitioning (a process whereby closely related species occurring in close proximity results in subtle differences in ecological niches) between these species. [8] In the eastern Gulf, the range of Gulf menhaden overlaps that of the yellowfin menhaden (Brevoortia smithi), and hybridization between these species has been demonstrated using morphological [3] and DNA evidence. [9] Gulf menhaden also may have a presence on the southern Atlantic coast of Florida, [9] [10] although this finding is based primarily upon DNA evidence.
Gulf menhaden are commonly eight inches in length but can reach 12 inches. Gulf menhaden are a dull silver with a greenish back. Like their Atlantic counterpart, Gulf menhaden have a prominent black spot found behind the gill cover followed by a row of smaller spots. [11]
Gulf menhaden are filter feeders, meaning that they collect food by filtering water through modifications of the branchial apparatus (gill or branchial arches and gill rakers). Like Atlantic menhaden, Gulf menhaden's diet depends on the size of their gill rakers, which change as menhaden age. Larval gulf menhaden feed primary on zooplankton because the rakers are not well developed. The juveniles, which generally correspond to when they are under the age of one, feed on phytoplankton. As they age and their gill rakers fully develop, menhaden shift their diet to primarily consume zooplankton. [12]
Spawning occurs offshore in winter (October–March). [2] Eggs and larvae are pelagic and are carried into estuarine nursery areas via prevailing currents. As a result, migration at this stage can be lengthy, and populations of Gulf menhaden throughout the Gulf of Mexico are generally thought to comprise a single genetic stock. [13]
The Gulf menhaden fishery is one of the largest in the United States. In 2013, the fishery supported four of the nation's top ten ports by volume of landings. [14] Gulf menhaden are harvested primarily for fish meal and fish oil based products. A much smaller number of menhaden are caught for use as bait. In addition to being one of the largest fisheries in the US, the Gulf menhaden fishery has also been recognized internationally for its sustainability.
The fishery's sustainability has also been certified by independent organizations. Friend of the Sea, an international seafood sustainability certification program, has recognized both the Atlantic menhaden and Gulf menhaden fisheries as sustainable. [15] This is both due to the healthy status of the stock as well as the fishery's low levels of bycatch, which it achieves with the use of purse seine nets. [16]
The Gulf menhaden is an important bait fish for recreational anglers. [17]
Gulf menhaden are managed by an interstate compact called the Gulf States Marine Fisheries Commission (GSMFC). According to the most recent 2013 stock assessment by the GSMFC, Gulf menhaden are "neither overfished nor experiencing overfishing." [18] In addition, according to the GSMFC, "the Gulf menhaden fishery is probably the most closely monitored and managed fishery in the Gulf of Mexico." [12] An example of the fishery's monitoring is the Gulf of Mexico purse seine fishery's participation in NOAA's Southeast Fisheries Observer Program since 2011. [19] Specifically, the Menhaden Advisory Committee (MAC) is the GSMFC subcommittee that oversees menhaden management.
According to the GSMFC: "Menhaden do not have the capacity to reduce unwanted phytoplankton blooms that arise from manmade sources, primarily because they eat mostly zooplankton. In addition, menhaden excrete large amounts of ammonia (a nitrogenous product), contributing to an already high nitrogen load." [12] Also, the commercial menhaden fishery only targets adult menhaden, which consume zooplankton, not juvenile menhaden, which do consume phytoplankton [20]
Menhaden, also known as mossbunker, bunker, and "the most important fish in the sea", are forage fish of the genera Brevoortia and Ethmidium, two genera of marine fish in the order Clupeiformes. Menhaden is a blend of poghaden and an Algonquian word akin to Narragansett munnawhatteaûg, derived from munnohquohteau, referring to their use of the fish as fertilizer. It is generally thought that Pilgrims were advised by Tisquantum to plant menhaden with their crops.
Clupeidae is a family of clupeiform ray-finned fishes, comprising, for instance, the herrings and sprats. Many members of the family have a body protected with shiny cycloid scales, a single dorsal fin, and a fusiform body for quick, evasive swimming and pursuit of prey composed of small planktonic animals. Due to their small size and position in the lower trophic level of many marine food webs, the levels of methylmercury they bioaccumulate are very low, reducing the risk of mercury poisoning when consumed.
Herring are various species of forage fish, mostly belonging to the family of Clupeidae.
Atlantic herring is a herring in the family Clupeidae. It is one of the most abundant fish species in the world. Atlantic herrings can be found on both sides of the Atlantic Ocean, congregating in large schools. They can grow up to 45 centimetres (18 in) in length and weigh up to 1.1 kilograms (2.4 lb). They feed on copepods, krill and small fish, while their natural predators are seals, whales, cod and other larger fish.
The genus Brevoortia are all species of menhaden, there are found mainly in western Atlantic and consist of the following species:
The king mackerelsurmayi or kingfish, is a migratory species of mackerel of the western Atlantic Ocean and Gulf of Mexico. It is an important species to both the commercial and recreational fishing industries.
The yellowfin tuna is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide.
Bait fish are small-sized fish caught and used by anglers as bait to attract larger predatory fish, particularly game fish. Baitfish species are typically those that are common and breed rapidly, making them easy to catch and in abundant supply.
The Atlantic menhaden is a North American species of fish in the herring family, Alosidae.
The crevalle jack, also known as the common jack, black-tailed trevally, couvalli jack, black cavalli, jack crevale, or yellow cavalli is a common species of large marine fish classified within the jack family, Carangidae. The crevalle jack is distributed across the tropical and temperate waters of the Atlantic Ocean, ranging from Nova Scotia, Canada to Uruguay in the western Atlantic and Portugal to Angola in the eastern Atlantic, including the Mediterranean Sea. It is distinguishable from similar species by its deep body, fin colouration and a host of more detailed anatomical features, including fin ray and lateral line scale counts. It is one of the largest fish in the genus Caranx, growing to a maximum known length of 124 cm and a weight of 32 kg, although is rare at lengths greater than 60 cm. The crevalle jack inhabits both inshore and offshore waters to depths of around 350 m, predominantly over reefs, bays, lagoons and occasionally estuaries. Young fish dispersed north by currents in the eastern Atlantic are known to migrate back to more tropical waters before the onset of winter; however, if the fish fail to migrate, mass mortalities occur as the temperature falls below the species' tolerance.
The blue runner, also known as the bluestripe jack, Egyptian scad, hardtail jack or hardnose, is a common species of moderately large marine fish classified in the jack family, Carangidae. The blue runner is distributed across the Atlantic Ocean, ranging from Brazil to Canada in the western Atlantic and from Angola to Great Britain including the Mediterranean in the east Atlantic. The blue runner is distinguished from similar species by several morphological features, including the extent of the upper jaw, gill raker count and lateral line scale counts. The blue runner is known to reach a maximum length of 70 cm and 5.05 kg in weight, but is much more common below 35 cm. The species inhabits both inshore and offshore environments, predominantly over reefs, however it is known to congregate around large, man-made, offshore structures such as oil platforms. Juveniles tend to inhabit shallower reef and lagoon waters, before moving to deeper waters as adults.
The finetooth shark is a species of requiem shark, in the family Carcharhinidae, found in the western Atlantic Ocean, from North Carolina to Brazil. It forms large schools in shallow, coastal waters, and migrates seasonally following warm water. A relatively small, slender-bodied shark, the finetooth shark can be identified by its needle-like teeth, dark blue-gray dorsal coloration, and long gill slits. It attains a maximum length of 1.9 m (6.2 ft). The diet of this species consists primarily of small bony fishes, in particular menhaden. Like other members of its family, it is viviparous with females giving birth to two to six pups in estuarine nursery areas every other year.
The barndoor skate is a species of marine cartilaginous fish in the skate family Rajidae of the order Rajiformes. It is native to the northwestern Atlantic Ocean, and is found from the Grand Banks of Newfoundland and the southern side of the Gulf of St. Lawrence south to North Carolina. The fish is one of the largest skates found in the North Atlantic Ocean, reaching lengths up to 1.5 m (5 ft). It is carnivorous, feeding on invertebrates and other fish found near the sea floor.
Forage fish, also called prey fish or bait fish, are small pelagic fish that feed on planktons and other small aquatic organisms. They are in turn preyed upon by various predators including larger fish, seabirds and marine mammals, this making them keystone species in their aquatic ecosystems.
As with other countries, the 200 nautical miles (370 km) exclusive economic zone (EEZ) off the coast of the United States gives its fishing industry special fishing rights. It covers 11.4 million square kilometres, which is the second largest zone in the world, exceeding the land area of the United States.
The European pilchard is a species of ray-finned fish in the monotypic genus Sardina. The young of the species are among the many fish that are sometimes called sardines. This common species is found in the northeast Atlantic, the Mediterranean, and the Black Sea at depths of 10–100 m (33–328 ft). It reaches up to 27.5 cm (10.8 in) in length and mostly feeds on planktonic crustaceans. This schooling species is a batch spawner where each female lays 50,000–60,000 eggs.
Clupea is genus of planktivorous bony fish belonging to the family Clupeidae, commonly known as herrings. They are found in the shallow, temperate waters of the North Pacific and the North Atlantic oceans, including the Baltic Sea. Two main species of Clupea are currently recognized: the Atlantic herring and the Pacific herring, which have each been divided into subspecies. Herrings are forage fish moving in vast schools, coming in spring to the shores of Europe and America, where they form important commercial fisheries.
A planktivore is an aquatic organism that feeds on planktonic food, including zooplankton and phytoplankton. Planktivorous organisms encompass a range of some of the planet's smallest to largest multicellular animals in both the present day and in the past billion years; basking sharks and copepods are just two examples of giant and microscopic organisms that feed upon plankton.
NOAAS Oregon, previously NOAAS Oregon, was an American fisheries research vessel in commission in the National Oceanic and Atmospheric Administration (NOAA) fleet from 1970 to 1980. Prior to her NOAA career, she operated under the United States Fish and Wildlife Service from 1949 to 1970 as US FWS Oregon.
The dwarf round herring is a marine species of fish in the family Spratelloididae. It is found in the western-central Atlantic Ocean from Bermuda and the Gulf of Mexico south to Tobago. The species is both edible and used as live bait.