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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Geophaginae
Etymology: Gymnogeophagus: Greek, gymnos = naked + Greek, gea = the earth + Greek, phaegein, to eat (Ref. 45335); jaryi: Name derived from the Guaraní word 'jarýi' meaning grandmother, and it is dedicated to the Non-Governmental Organization of 'Abuelas de Plaza de Mayo' whose objective is to locate and restore to their legitimate families all the children who disappeared during the last Argentine dictatorship; noun in apposition..
Issue
Entered from e-publication.
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة قاعية التغذية و المعيشة. Tropical
South America: Argentina and Paraguay.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 13.3 cm SL ذكر/ مختلط الجنس; (Ref. 119666)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشواك الظهرية (المجموع) : 13 - 14; الأشعة الظهرية الناعمة (المجموع) : 10 - 11; شوكة شرجية: 3; أشعه شرجية لينه: 8 - 9. This species is distinguished from all its congeners except G. australis and G. caaguazuensis, by the presence of a hyaline to grey anterior portion of the dorsal fin; differs from caaguazuensis by having a longer caudal peduncle, caudal fin not lyrate, central portion of scales on dorsal part of trunk light iridescent blue and white spots in soft portion of dorsal fin in adult males; differs from australis by the light iridescent blue coloration of central area of scales on the dorsal portion of trunk and tail, and by the absence of scales on the soft portion of the dorsal fin. It is further distinguished by the following unique set of characters: D 10-11 branched rays; 27-30 E1 scales; absence of lips thickening; adult males with a hump, with large white spots forming transversal stripes distally and in anterior area of the dorsal fin’s soft portion, absence of a conspicuous and oblique dark band from the eye to the anterior border of the head, anterior part of dorsal fin hyaline to grey, scales of the midlateral spot each bearing a semicircular light blue blotch, the head hump start at the horizontal through the eyes, concave anterior profile in lateral view, base of unpaired fins yellow, and whitish hyaline spots on caudal fin (Ref. 119666).
Inhabits streams with sandy and rocky bottom and abundant marginal vegetation. The climate where it is found, on the mountain ridge in Aristóbulo del Valle, is classified as warm and temperate. In this area there is a significant rainfall throughout the year (average per year is 1,678 mm), and even in August with the lowest precipitation, it still has a considerable amount of rain (111 mm). The lowest precipitation occur from July to September, the driest period and lowest water levels from December to February due to the marked seasonal change in temperature, and peaks in precipitation occur from May and October. The annual average temperature is 19.1°C, with 23.9ºC monthly average temperature in January and 14.3ºC in June. Water level in the stream can have important changes: water turbidity is variable among the year with peaks of turbidity after rains and increases in water visibility the rest of the year. Specimens are frequently collected in the rocky areas or associated with marsh and marginal vegetation. The holotype was collected together with the female paratype under the marginal vegetation and with fry on November 2016 (Ref. 119666).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Alonso, F., G.E. Terán, G. Aguilera, O. Rican, J. Casciotta, W.S. Serra, A. Almirón, M.F. Benítez, I. García and J.M. Mirande, 2019. Description of a new species of the Neotropical cichlid genus Gymnogeophagus Miranda Ribeiro, 1918 (Teleostei: Cichliformes) from the Middle Parana´ basin, Misiones, Argentina. PLoS ONE 14(2):e0210166. (Ref. 119666)
IUCN Red List Status (Ref. 130435)
في خطر (EN) (B1ab(iii)); Date assessed: 16 December 2020
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01862 (0.00849 - 0.04084), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
