Brazil country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Off southern Brazil (Ref. 31276, 52140). Also Ref. 39281.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/br.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Mincarone, M.M. and C.L.S. Sampaio, 2004
National Database:

Common names from other countries

Kreffti peenpihklane, ... more

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

Myxini (миксины) (hagfishes) > Myxiniformes (Hagfishes) > Myxinidae (Hagfishes) > Myxininae
Etymology: Nemamyxine: nema (Gr.), thread, i.e., a thin, elongate Myxine. (See ETYFish); kreffti: In honor of German ichthyologist-herpetologist Gerhard Krefft (1912-1993), Institute für Seefischerei (Hamburg), on the occasion of his 70th birthday, for his many “valuable” contributions to oceanic ichthyology; Krefft also loaned holotype to the authors [not to be confused with his great uncle, German-born Australian adventurer and zoologist Johann Ludwig (Louis) Gerard Krefft (1830-1881), for whom several fishes are named]. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range экология

морской батидемерсальный; немигрирующий; пределы глубины 80 - 800 m (Ref. 31276). Deep-water

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

Southwest Atlantic: off Argentina and southern Brazil.

Size / Вес / Возраст

Maturity: L_m ? range ? - ? cm
Max length : 40.0 cm TL самец/пол неопределен; (Ref. 31276)

Краткое описание определительные ключи | морфология | морфометрия

Diagnosis: Body color light to dark brown, ventral finfold with unpigmented margin. Body extremely slender, depth about 2.4-2.9% of TL. Origin of the ventral finfold well anterior to pharyngocutaneous duct (PCD). Gill pouches 8 pairs. Rostrum rounded. A 3-cusp multicusp on anterior set, a 2-cusp multicusp on posterior set of cusps; total cusps count 32-38. Total pores 124-148 (Ref. 39281).

Specimens were caught in winter months, between May and August, a period of lower water temperature due to the Falklands Current influence (Ref. 39281).

Life cycle and mating behavior Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки

Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).

Основная ссылка Upload your references | ссылки | координатор | соавторы

Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)

Статус Красного Списка МСОП (Ref. 130435)

Близок к исчезновению (NT) ; Date assessed: 11 November 2009

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

Harmless

Использование человеком

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Estimates based on models

Preferred temperature (Ref. 115969): 8.8 - 16.3, mean 14.5 (based on 25 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00115 (0.00045 - 0.00296), b=3.03 (2.80 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.6 se; based on size and trophs of closest relatives

устойчивость к внешним воздействиям (Ref. 120179): низкий, минимальное время удвоения популяции 4.5-14 лет (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (30 of 100).

Nemamyxine kreffti McMillan & Wisner, 1982