Lepidosiren paradoxa, South American lungfish : fisheries

You can sponsor this page

Lepidosiren paradoxa Fitzinger, 1837

South American lungfish
Upload your photos and videos
Pictures | Google image
Image of Lepidosiren paradoxa (South American lungfish)
Lepidosiren paradoxa
Picture by Muséum-Aquarium de Nancy/D. Terver

Classification / Names आम नाम | उपशब्द | Catalog of Fishes(वर्ग, प्रजाति) | ITIS | CoL | WoRMS | Cloffa

> Ceratodontiformes (Australian lungfishes) > Lepidosirenidae (Aestivating lungfishes)
Etymology: Lepidosiren: Greek, lepis = scale + Greek, seiren = a mythological serpent, 1520 (Ref. 45335).

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

; स्वच्छ जल, अलवण जल ड़िमरसल. Subtropical; 24°C - 28°C (Ref. 2060); 5°N - 35°S

वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri

South America: Amazon, Paraguay and lower Paraná River basins.

आकार / वज़न / Age

Maturity: Lm ?  range ? - ? cm
Max length : 125 cm TL पुल्लिंग / अलिंग; (Ref. 36887); अधिकतम सूचित उम्र: 8 वर्षो (Ref. 274)

जीवविज्ञान     शब्द संग्रह (उदाहरणार्थ epibenthic)

Obligate air-breathing (Ref. 126274); Prefers stagnant waters where there is little current. Juveniles feed on larval insects and snails. Adults are omnivorous and feed on aquatic vertebrates, invertebrates such as snails, clams and shrimp, and algae (Ref. 36739). Can survive low oxygen levels in its habitat by means of its very reduced branchial apparatus. It possesses two lungs without bronchial tubes. During the dry period, this species burrows into the mud, to a depth of about 30-50 cm, and seals off the entrance with clay, leaving out 2-3 holes for aeration. It reduces its metabolism during this period of hibernation. The fish are obligate air-breathers and will drown if denied access to the surface (Ref. 36739). During the rainy season, reproduction begins. The parents gather vegetal debris in a burrow (about 1.5 m long) to create a nest. During reproduction, males guard the young. These males can increase the oxygen level in the burrow because during breading season the pelvic fins develop highly vascularized, gill-like, feathery structures which perform a function opposite to those of gills: they releases oxygen from the blood and take in carbon dioxide; the filaments disappear after the end of the breeding season (Ref. 12225, 36739). The young look like amphibian tadpoles with four external gills. During the first weeks of their life they breath only through the external gills; at an age of 7 weeks they become air-breathing and regression of the external gills begins (Ref. 27188, 36739).

Life cycle and mating behavior परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा

Spawning occurs during the wet season. Adult males guard and aerate the hachlings and young temporarily. Adult males develop vascular filaments on their paired fins which function either as auxillary to respiration so that they can breathe air without leaving the nest or the fin filaments permit the emission of aerially obtained oxygen in to the nest water, causing the oxygenation of the water surrounding the eggs (Ref. 111170). The function of the filaments is much debatable as of the present.

Main reference Upload your references | संदर्भ | संयोजक | सहयोगीयो

Arratia, G., 2003. Lepidosirenidae (aestivating lungfishes). p. 671-672. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36887)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 21 October 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

मात्स्यिकी: निर्वाह मात्स्यिकी
FAO - Publication: search | FishSource |

अधिक जानकारी

आम नाम
उपशब्द
चपायचय
परभक्षी
ईकोटोकसीकोलौजी
पुनरुत्पत्ति
परिपक्व अवधि
मछलीऔ का अंडे देना
Spawning aggregation
Fecundity
अंडे
Egg development
Age/Size
बाढ़
Length-weight
Length-length
Length-frequencies
मौरफोमैटरिक्स
आकृति विज्ञान
लार्वा
लारवल गतिकी
भर्ती
बहुतायत
BRUVS
संदर्भ
जलीयकृषि
जलीयकृषि रूपरेखा
खींच
आनुवंशिकी
Electrophoreses
हैरेटिबिलटी
बीमारी
प्रक्रमण
Nutrients
Mass conversion
सहयोगीयो
तस्वीरे
Stamps, Coins Misc.
ध्वनि
सिगुयटिरा
रफ्तार
तैरने के प्रकार
गिल क्षेत्र
Otoliths
दिमाग
दृष्टि

साधन

Special reports

Download XML

इंटरनेट स्रोत

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 1.5352   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.46 se; based on food items.
लौटाव (Ref. 120179):  बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (tmax=>22; Fec = 22).
Fishing Vulnerability (Ref. 59153):  High to very high vulnerability (75 of 100).
Price category (Ref. 80766):   Unknown.