Geotria macrostoma (Burmeister, 1868)
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Geotria macrostoma
عکس از Scarlato, N.
عکس ها | تصوير گوگل
عکس از Scarlato, N.
رده بندی / نامها اسامي عام | مترادف | Catalog of Fishes(جنس, گونه ها) | ITIS | CoL | WoRMS | Cloffa
> Petromyzontiformes (Lampreys) > Geotriidae (Southern lampreys)
Etymology: Geotria: Etymology not explained, although three possibilities, all problematical, have been proposed: (1) from the Greek geotragia, “eating of earth-like substances,” referring to how this lamprey, like other lampreys, uses its suctorial mouth to attach itself to submerged rocks and stones, thus creating the impression that it is feeding on the earth (problem: geotragia does not mean “earthy,” as in rocks and minerals, but “products of the earth,” such as grains and vegetables; (2) geo- (Gr.), earth, and atrium (L.), room, referring to this lamprey’s nest, presumably made of stones and pebbles assembled by one or both parents (problem: nest-building, while known in other river lampreys, was probably not known to Gray in 1851 and has not been documented for this species); (3) a variation of #2, proposed by Meagher (2010), referring to its discovery in underground chambers, in which it survives dry periods (problem: G. australis does not, nor does any other lamprey, aestivate, nor did Gray indicate it was discovered underground, although he did speculate whether the pouch was an adaptation to the “long drought of the Australian rivers”). See EthyFish.org for more details (See ETYFish); macrostoma: macro-, from makros (Gr.), large; stoma (Gr.), mouth (but used here as an adjective, mouthed), presumably referring to greatly expanded oral disc of spawning adults (See ETYFish).
Etymology: Geotria: Etymology not explained, although three possibilities, all problematical, have been proposed: (1) from the Greek geotragia, “eating of earth-like substances,” referring to how this lamprey, like other lampreys, uses its suctorial mouth to attach itself to submerged rocks and stones, thus creating the impression that it is feeding on the earth (problem: geotragia does not mean “earthy,” as in rocks and minerals, but “products of the earth,” such as grains and vegetables; (2) geo- (Gr.), earth, and atrium (L.), room, referring to this lamprey’s nest, presumably made of stones and pebbles assembled by one or both parents (problem: nest-building, while known in other river lampreys, was probably not known to Gray in 1851 and has not been documented for this species); (3) a variation of #2, proposed by Meagher (2010), referring to its discovery in underground chambers, in which it survives dry periods (problem: G. australis does not, nor does any other lamprey, aestivate, nor did Gray indicate it was discovered underground, although he did speculate whether the pouch was an adaptation to the “long drought of the Australian rivers”). See EthyFish.org for more details (See ETYFish); macrostoma: macro-, from makros (Gr.), large; stoma (Gr.), mouth (but used here as an adjective, mouthed), presumably referring to greatly expanded oral disc of spawning adults (See ETYFish).
Taxonomic Remarks
Previously synonymized with Geotria australis Gray, 1851. See Ref. 125540 for explanations about the resurrection from Geotria australis.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع بوم شناسي
دريايي; آب شيرين; لب شور نزديك كف زي; unknown. Temperate
پراكنش سرزمینها | مناطق سازمان خوار و بار جهاني (FAO) | اکوسیستمها | ظهور | نقشه نقطه ای | معرفي | Faunafri
South America and Southwest Atlantic Islands: De la Plata River, Uruguay; de la Plata
River to Tierra del Fuego, Argentina; Malvinas (Falkland) Islands, South Georgia. One record in a river tributary of Magellan Strait in Chile.
اندازه / وزن / سن
توصيف مختصر كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
This species is distinguished from G. australis by having a second dorsal fin connected with the caudal fin by a low skin fold (vs. separate), and by the position of the cloaca posterior to the origin of the second dorsal fin in immature and mature adults (cloaca anterior to or under the origin of the second dorsal fin); while the position of fins and cloaca of mature G. macrostoma remains similar to that of juvenile and sub-adults, in spawning adults of G. australis the separation between the second dorsal fin and the caudal fin becomes reduced to a notch (Ref. 125560).
Cross section: oval.
Cross section: oval.
Length of sub-adult individuals 41.2-62.9 cm TL (Ref. 125560).
چرخه زندگی و رفتار جفتگیری بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
Semelparous (Ref. 89241).
مآخذ اصلی
مراجع خود را بارگذاری کنید | مراجع | هماهنگ كننده | همكاران
Firpo Lacoste, F., L. Fernández and C. Scioscia, 2021. On an unknown lamprey holotype (Petromyzon macrostomus Burmeister 1868) and the genus Exomegas Gill 1883 from South America. J. Fish Biol. 99(4):1507-1512. (Ref. 125540)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
حداقل نگرانی (LC) ; Date assessed: 06 May 2022
CITES
Not Evaluated
خطر برای انسان ها
استفاده انسانی
FAO - Publication: search | FishSource |
اطلاعات بيشتر
بومشناسی گرمسیری
اقلام غذایی (طعمهها)
تركيب غذايي
مصرف غذايي
جیره غذایی
شکارچیان
اقلام غذایی (طعمهها)
تركيب غذايي
مصرف غذايي
جیره غذایی
شکارچیان
بوم شناسي
بوم شناسي
بوم شناسي
پویایی جمعیت
پارامترهای رشد
حداکثر سن/اندازه
نسبت طول-وزن.
طول-طول نسبی.
نوسانات طولی
تبدیل انبوه
بازسازی
فراواني
پارامترهای رشد
حداکثر سن/اندازه
نسبت طول-وزن.
طول-طول نسبی.
نوسانات طولی
تبدیل انبوه
بازسازی
فراواني
چرخه زندگی
تولید مثل
بلوغ
بلوغ/آبششها
باروری
تخم ریزی
تجمعات تخمریزی
تخم ها
نمو تخم
توزاد ( لارو)
پويايي لاروي
تولید مثل
بلوغ
بلوغ/آبششها
باروری
تخم ریزی
تجمعات تخمریزی
تخم ها
نمو تخم
توزاد ( لارو)
پويايي لاروي
آناتومی
منطقه آبششي
مغز
اتولیت
منطقه آبششي
مغز
اتولیت
فیزیولوژی
ترکیب بدن
مواد مغذی
مصرف اکسیژن
نوع شنا
سرعت شنا
رنگدانههای بصری
صدای ماهی
بیماریها و انگلها
سمیت (LC50s)
ترکیب بدن
مواد مغذی
مصرف اکسیژن
نوع شنا
سرعت شنا
رنگدانههای بصری
صدای ماهی
بیماریها و انگلها
سمیت (LC50s)
ژنتيك
ژنوم
ژنتيك
هتروزیگوسیتی
وارث
تنوع ژنتیکی
ژنوم
ژنتيك
هتروزیگوسیتی
وارث
تنوع ژنتیکی
ابزارها
کتاب الکترونیکی | راهنماي صحرايي | امكان نرم افزاري بسامد طولي | ابزار تاريخ زيستي | نقشه نقطه ای |
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منابع اينترنتي
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | فيش واچر را ببينيد | CISTI | Catalog of Fishes: جنس, گونه ها | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | پايگاه هاي داده ها | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: برو, جستجو | World Records Freshwater Fishing | سوابق جانورشناسی
تخمینها بر اساس مدلها
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شاخص تنوع فیلوژنتیکی (مرجع 82804) |
PD50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
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سطح تروفیک (مرجع 69278) |
4.4 ±0.8 se; based on size and trophs of closest relatives |
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آسیبپذیری ماهیگیری (Ref. 59153) |
Moderate to high vulnerability (46 of 100). 🛈 |