Occidentis ayresii (Günther, 1870)
Western river lamprey
را بارگذاری کني تصاوير و فيلم ها
عکس ها | تصوير گوگل
Occidentis ayresii
Male عکس از FAO
عکس ها | تصوير گوگل
Male عکس از FAO
رده بندی / نامها اسامي عام | مترادف | Catalog of Fishes(جنس, گونه ها) | ITIS | CoL | WoRMS | Cloffa
> Petromyzontiformes (Lampreys) > Petromyzontidae (Northern lampreys) > Lampetrinae
Etymology: ayresii: In honor of physician-ichthyologist William O. Ayres (1817-1887), founding member of the California Academy of Sciences, who described this species in 1855 but used a preoccupied name (Petromyzon plumbeus) (See ETYFish).
Eponymy: Dr William Orville Ayres (1817–1887) was an American ichthyologist, ornithologist and physician. [...] (Ref. 128868), visit book page.
More on author: Günther.
Etymology: ayresii: In honor of physician-ichthyologist William O. Ayres (1817-1887), founding member of the California Academy of Sciences, who described this species in 1855 but used a preoccupied name (Petromyzon plumbeus) (See ETYFish).
Eponymy: Dr William Orville Ayres (1817–1887) was an American ichthyologist, ornithologist and physician. [...] (Ref. 128868), visit book page.
More on author: Günther.
Taxonomic Remarks
The specific identity of Ammocoetes cibarius Girard 1858 cannot be established with certainty and could be either Lampetra ayresii or Entosphenus tridentatus (see that species’ account) (Ref. 89241).
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع بوم شناسي
دريايي; آب شيرين; لب شور نزديك كف زي; رود کوچ (Ref. 89241). Temperate; 59°N - 37°N
پراكنش سرزمینها | مناطق سازمان خوار و بار جهاني (FAO) | اکوسیستمها | ظهور | نقشه نقطه ای | معرفي | Faunafri
Eastern Pacific: Tee Harbor, Alaska to Sacramento-San Joaquin drainage in California, USA. Freshwater resident population in Morrison Creek, Vancouver Island, British Columbia (Ref. 12269).
طول در اولین بلوغ / اندازه / وزن / سن
بلوغ: Lm 16.2 range ? - ? cm
Max length : 28.1 cm TL جنس نر / بدون خواص جنسي; (Ref. 1998); 31.1 cm TL (female); common length : 20.5 cm TL جنس نر / بدون خواص جنسي; (Ref. 12193)
Max length : 28.1 cm TL جنس نر / بدون خواص جنسي; (Ref. 1998); 31.1 cm TL (female); common length : 20.5 cm TL جنس نر / بدون خواص جنسي; (Ref. 12193)
توصيف مختصر كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
Distinguished by 2 large teeth on the supraoral bar, a large middle tooth on the tongue, 3 points (rarely 2) on each central lateral tooth plate, and the absence of posterial teeth (Ref. 27547). Anterior dorsal fin being lower than posterior, the fins separate in nonbreeding individuals but coming into contact at spawning; caudal fin lobes about equal, lower lobe joined to anal fin; anal fin virtually absent in males (Ref. 27547). Dark brown or brownish gray on sides and back; belly yellowish, silvery around head, gill openings and lower sides; caudal fin has a band of dark pigment inside its margins, symmetrical on each lobe (Ref. 27547). Other diagnostic features: Adults: 11.4-31.1 cm TL. Body wet weight in individuals 17.5-23.0 cm TL, 20-24 g. Body proportions, as percentage of TL (based on 68 specimens measuring 11.7-31.1 cm TL): prebranchial length, 10.9-14.1; branchial length, 7.8-11.8; trunk length, 45.9-55.9; tail length, 24.4-29.5; eye length, 2.3-4.3; disc length, 4.7-7.2. The urogenital papilla length, as a percentage of branchial length, in two spawning males measuring 17.4-18.7 cm TL, 10.3-12.5. Trunk myomeres, 60-71. Dentition: supraoral lamina, 2 unicuspid teeth; infraoral lamina, 7-10 teeth, the lateralmost often bicuspid, the others unicuspid; 3 endolaterals on each side; endolateral formula, typically 2-3-2, very rarely 2-2-2; 3 rows of anterials; first row of anterials, 4 unicuspid teeth; exolaterals absent; posterials absent; transverse lingual lamina, 12-17 unicuspid teeth, the median one greatly enlarged; longitudinal lingual laminae each with 9-12 unicuspid teeth. Velar tentacles, 3-5, with tubercles. Body coloration in marine waters (live), lead gray on dorsal and upper lateral aspects, silvery on the lateral aspect, and white on the ventral aspect. Body coloration (preserved), dorsal and lateral aspects brownish gray and ventral aspect whitish. Lateral line neuromasts unpigmented. Extent of caudal fin pigmentation, 25% to more than 75%. Caudal fin shape, spade-like or rounded. Oral fimbriae, 88-117. Oral papillae, 12-18 (Ref. 89241).
Body shape (shape guide): eel-like.
Body shape (shape guide): eel-like.
Anadromous. A permanent freshwater resident population is believed to occur in Morrison Creek, British Columbia. In marine waters, they inhabit surface waters. In fresh waters, they occur in lakes, rivers, and creeks. They leave rivers to enter the sea in late spring or early summer, where they actively feed throughout the summer, and return to the rivers in the fall (Ref. 89241). Parasitic adults are found in estuaries and the ocean, migrating to clear gravel riffles of streams to spawn (Ref. 5723). Ammocoetes burrow into the mud where they live for an unknown period and migrate to the sea only after transformation (Ref. 1998). Adults feed by ripping flesh from other fishes (Ref. 2850), ammocoetes feed on microscopic plants and animals just like other members of this family (Ref. 1998). Parasitism can take place at a length of 16.2 cm TL (Ref. 1998). Preyed upon by a number of fishes, e.g. lingcod, and birds (Ref. 1998). In the Sacramento River, California, the spawning season is thought to be from late April into May. Fecundity, 11,398-37,288 eggs/female. Egg diameter, 0.6-0.7 mm (Ref. 89241). Because of its small size, it is unlikely to pose a threat to economically important fish (Ref. 1998). Utilized fresh or smoked by some cultures (Ref. 27436).
چرخه زندگی و رفتار جفتگیری بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
Probably spawns in gravel, with an activity similar to Lethenteron japonicum (Ref. 1998).
مآخذ اصلی
مراجع خود را بارگذاری کنید | مراجع | هماهنگ كننده | همكاران
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
حداقل نگرانی (LC) ; Date assessed: 21 February 2012
CITES
Not Evaluated
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: ارزش تحاري اندك
FAO - Publication: search | FishSource |
اطلاعات بيشتر
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
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 | كليدهاي شناسايي | 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 | 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 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00129 (0.00059 - 0.00283), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
سطح تروفیک (مرجع 69278) |
4.5 ±0.80 se; based on food items. |
|
جهندگی (مرجع 120179) |
پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Fec=11,398). |
|
آسیبپذیری ماهیگیری (Ref. 59153) |
Moderate to high vulnerability (52 of 100). 🛈 |
|
طبقه قيمت (Ref. 80766) |
Unknown. |