Trematoda |
Azygiida |
Hirudinellidae
Environment: milieu / climate zone / пределы глубины / distribution range
экология
. Tropical
Atlantic Ocean and Pacific Ocean.
Length at first maturity / Size / Weight / Возраст
половая зрелость: Lm ? range ? - ? cm Max length : 17.0 cm TL самец/пол неопределен; (ссылка 359)
This small to very large fluke is unmistakable in the stomach of wahoo; a fleshy worm that varies in size and shape; with extended worms the size of a mans finger and contracted ones about the size of a walnut. Smaller worms: still massive but they are capable of contorting into many shapes. Color: brown to pinkish. 2 suckers: easily seen and are close together on the anterior end of the worm.
Length: 0.85 to 10 cm; Live worms may extend to 17 cm. Significance: The wounds they produce and sheer size must have a negative, if unstudied, impact on big game fishes. They have also been used as biological tags (Ref. 359). Associations: We examined 13 dolphin collected off La Parguera, Puerto Rico, for total parasites. Five of these fish had 2 to 3 of these worms, and thousands of other flukes in their stomachs. However, there was no obvious relationship between these worms and other species of flukes. One worm was found in a 0.1 cm long 0.02 cm wide stomach ulcer of an albacore from Desecheo Island. The relationship between stomach ulcers and stomach parasites in big game fishes is not certain. We have seen injuries to the stomach lining of wahoo caused by these worms, but could not be certain that these were not caused after the death of the host. Host Specificity: Wahoo is the preferred host of this parasite, both by being almost always present, and by achieving a consistently large size in this host. It is a characteristic parasite of wahoo and a primary parasite of Atlantic blue marlin, dolphin, little tunny and possibly other scombrids. Secondary parasite: scombrids and billfishes. New Hosts: Blackfin tuna, frigate tuna and longbill spearfish. Damage to Host: causes wounds by penetrating the stomach lining to feed on blood; and absorb a considerable amount of blood. Few worms occur per host. Usually only 1 or 2 of the worms present in the stomach of a host are very
large. Some mechanism of the parasites or the hosts appears to regulate both the numbers and sizes (Ref. 359).
Life cycle and mating behavior
половая зрелость | размножение | нерест | Eggs | Fecundity | Larvae
Members of the class Trematoda are parasitic, thus requires a host to survive. Life cycle: Eggs are passed on to the feces of the hosts. Embryos hatch into miracidia and penetrate the tissues of snails where they further undergo three stages: sporocysts
Основная ссылка
ссылки | координатор | соавторы
Williams, E.H. Jr. and L. Bunkley-Williams 1996 Parasites of offshore big game fishes of Puerto Rico and the Western Atlantic. Puerto Rico Department of Natural and Environment Resources, San Juan, PR, and the University of Puerto Rico, Mayaguez, PR, 382 p. 320 drawings. (ссылка 359)
Статус Красного Списка МСОП
(ссылка 130435: Version 2025-1)
Статус СИТЕС (ссылка 108899)
Not Evaluated
CMS (ссылка 116361)
Not Evaluated
Угроза для людей
Использование человеком
| FishSource |
инструменты
дополнительная информация
Trophic EcologyFood items (preys)
состав пищи
потребление пищи
хищники
Population dynamicsрост
Max. ages / sizes
Length-weight rel.
Length-length rel.
Размерный состав
Mass conversion
численность
Life cycleразмножениеполовая зрелостьFecundityнерестEggsРазвитие икрыLarvae PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
ресурсы в Интернет
Estimates based on models
Fishing Vulnerability
Low vulnerability (10 of 100).
Категория цены
Unknown.
