#Urogymnus polylepis

[cilginfizikcilervbi]

Şimdiye Kadar Yakanmış En Büyük Tatlı Su Balığı

Şimdiye Kadar Yakanmış En Büyük Tatlı Su Balığı

Şimdiye Kadar Yakanmış En Büyük Tatlı Su Balığı Kamboçya’da balıkçıları, şimdiye kadar yakalanmış en büyük tatlı su balığını yakaladılar. Yaklaşık 4 metre uzunluğunda ve 300 kilogramlık ağırlıktaki dev tatlı su vatozunun (Urogymnus polylepis) doğal yaşam ortamında davranışı pek bilinmiyor. Takip cihazı takılıp doğal yaşam alanına serbest bıraklılan vatoz, cihaz sayesinde bu tür hakkında bir çok…

[uncharismatic-fauna]

Uncharismatic Fact of the Day

Surprisingly enough, mammals aren't the only animals that provide their young with milk! The giant freshwater stingray is one of several species of cartelaginous, live-bearing fish that sustain their young to term through a form of maternal care called histotrophy, in which the mother provides her embryo(s) with nutritional, milk-like secretions known as trophonemata while they're in the uterus.

(Image: A giant freshwater stingray (Urogymnus polylepis) caught and released by Cambodian fishermen, by Chhut Chheana)

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[asterwild]

headline round-up! here's some recent positive and/or peculiar news that crossed my feed:

Hawaiian monk seal population surpasses 1,500! (via NOAA Fisheries, May 2022) Thanks to diligent conservation work, this endangered species is at its highest population size in over 20 years.

Stingray sets new record for largest freshwater fish (via NYT and Guiness Word Records, June 2022) This 300kg giant freshwater stingray (Urogymnus polylepis) was caught in northern Cambodia.

150 southern fin whales observed feeding together (via Science Daily and Twitter, July 2022) Fin whales (Balaenoptera physalus quoyi) were hunted to near extinction before the commercial whaling ban in 1976. These feeding groups are the largest documented with modern methods.

Meet the K Pod's newest member! (via Center for Whale Research and Puget Sound Institute, July 2022) Designated K45, this is the first documented calf born in the K Pod of Southern Resident orcas since 2011.

A Greenland shark caught near Belize (via NPR, July 2022) Researchers tagging tiger sharks had quite the surprise when they found a Greenland shark, one of the longest-lived animals on Earth, typically found in the Arctic.

Albatrosses from space! (via British Antarctic Survey, September 2022) You can assist albatross conservation efforts by joining this citizen science project. "Albatross detectives" help search through thousands of satellite images to count birds as they nest on remote islands.

[typhlonectes]

Stingray Found in Cambodia Sets Record for World’s Largest Freshwater Fish

The enormous fish is 13 ft long and weighs 661 lbs

The world’s largest freshwater fish, a 13-foot-long, 661-pound stingray, has been discovered in the Mekong River in Cambodia. Scientists say the animal is a hopeful sign for the river, which faces threats from human encroachment and development, damming and climate change, per a statement from FISHBIO, a fisheries and environmental consulting company.

The giant freshwater stingray (Urogymnus polylepis) was caught on June 13 by a local fisherman, who alerted scientists from the Wonders of the Mekong project, a joint Cambodian-U.S. research and outreach initiative.

The Mekong River, which runs through China, Myanmar, Laos, Thailand, Cambodia and Vietnam, is home to several giant fish species. This particular section—south of Stung Treng in northeastern Cambodia—may be an important breeding ground for the stingrays; four females of the species, including this one, have been caught in the area recently, per the AP. Last month, a group of local fishermen caught a 400-pound female stingray in the same stretch, writes Mongabay’s Carolyn Cowan...

Read more:  https://www.smithsonianmag.com/smart-news/stingray-found-in-cambodia-sets-record-for-worlds-largest-freshwater-fish-180980288

[ubu507]

A Urogymnus polylepis, or giant stingray, was fished out of the Mekong River

Credit...Chhut Chheana

[davidwfloydart]

A giant freshwater stingray (Urogymnus polylepis) caught and released by Cambodian fishermen. #marinelife #cambodia #cambodian #fishermen #stingrays #giantfreshwaterstingray #amazingnature (at Catalina Foothills, Arizona) https://www.instagram.com/p/CjJq59dpHEKeW7ds-UzVer8jjkuoK9j6hk_XSU0/?igshid=NGJjMDIxMWI=

[kriznews]

For 17 years, Zeb Hogan, a biologist, has been shopping for the enviornment’s largest freshwater fish. On June 13, his personnel chanced on it — a huge freshwater stingray, or Urogymnus polylepis. The ray, hauled out of the dusky waters of the Mekong River in Cambodia, measured 13 toes in length sooner than it turned into returned to the river. And at 661 kilos, it turned into 15 kilos heavier than a Mekong huge catfish caught in Thailand in 2005. Hogan acknowledged he had beforehand established that freshwater fish because the generous ever caught. In an undated image equipped by Zeb Hogan, UNR Global Water Center, A suited catfish caught on the Tonl Sap River in Cambodia. In the Mekong River in Cambodia, fishers and researchers chanced on a 13-foot-prolonged, 661-pound stingray — a make a selection for conservation efforts in the gap. (Image credit: Zeb Hogan, UNR Global Water Center by map of The Unusual York Times)While this species of huge stingray has an extraordinarily unhealthy venomous barb that can reach nearly 1 foot in length, they aren't veritably a possibility to folk. Extra continuously, they lastly cease up in the market as a supply of low-price protein. Fishers in Cambodia first alerted Hogan and his personnel at Wonders of the Mekong Venture, which works to give protection to the Southeast Asian river’s aquatic range and is subsidized by the U.S. Company for Global Model, that they had caught a stingray better than anyone had ever considered. Crew contributors rushed to the little river island, called Koh Preah, and lined up three industrial scales. The utilization of a tarp, they hoisted the stingray out of the water and onto the scales to advise its weight. The invention comes not as a lot as a month after one other huge stingray — that one weighing 400 kilos — turned into caught and released shut by. Two diverse tall rays possess additionally been caught this 365 days. “The reality that the enviornment’s largest freshwater fish turned into caught in the Mekong is distinguished,” Hogan acknowledged. “This is a heavily populated space, and the river faces a ton of challenges, in conjunction with a total lot fishing.” In a single other first, Hogan’s personnel turned into in a location to suit the stingray with an acoustic label to trace the animal for as a lot as one 365 days with an array of 36 underwater receivers that were additionally not too prolonged ago place in in a stretch of the river. “This is the major fish that we’ve tagged since having the array deployed,” acknowledged Hogan, who is additionally a learn affiliate professor on the University of Nevada, Reno. In the months ahead, they concept to label a total lot of extra fishes. With so many huge stingrays caught in recent months and all of them female, Hogan believes this stretch of the river and the deep pools it incorporates are a important breeding ground for the species. The distance is additionally dwelling to freshwater dolphins, huge soft-shell turtles, huge catfish and big barb, which is in the carp family. “So it’s a extraordinarily queer location and in actuality understudied,” he acknowledged. North American and European river programs earn far extra scientific consideration. While breaking the enviornment file turned into not scientifically vital, Hogan acknowledged that the existence of this fish is a hallmark for the nicely being of its ecosystem. He additionally hoped the invention reminds the local of us how particular this river is and the map in which powerful it’s in need of saving. Attributable to a combination of components, in conjunction with dam building, overfishing and local climate switch, huge freshwater fish populations are veritably in decline. And heaps of species of huge fish are inclined to disappearing forever. “In 2020, one of many contenders for the enviornment’s largest freshwater fish, identified because the Chinese paddlefish, turned into declared extinct,” Hogan acknowledged. “That turned into very unhappy news, and it had me feeling bask in we were going to survey extra extinctions of those huge fish, slightly than files being broken.” Happily, the huge stingrays are not the generous huge fish tales of unhurried. In 2021, a file-setting 240-pound lake sturgeon turned into caught and released in the Detroit River. And in Can even, a nearly 300-pound alligator gar will possess broken the Texas impart file for the freshwater fish, though the angler chose to commence the animal slightly than raze it and produce it in to be weighed. “In the event you hear tales about file fish, that’s a lawful signal,” Hogan acknowledged. This text in the starting up regarded in The Unusual York Times.

[mondonews]

A Giant Stingray May Be the World’s Largest Freshwater Fish

A Giant Stingray May Be the World’s Largest Freshwater Fish

In the Mekong River in Cambodia, fishers and researchers found a 13-foot-long, 661-pound stingray — a win for conservation efforts in the area. For 17 years, Zeb Hogan, a biologist, has been searching for the world’s largest freshwater fish. On June 13, his team found it — a giant freshwater stingray, or Urogymnus polylepis. While this species of giant stingray has an extremely dangerous venomous…

[juniperpublishersoceanography]

A Review of Recent Status on Stingrays (Chondrichthyes: Dasyatidae) In Indonesian Waters- Juniper Publishers

Abstract

In this paper, the status of stingrays (family Dasyatidae) in Indonesian waters are summarized. There are 40 valid species of stingrays recorded here. Based on distribution of stingrays within seven faunal region of Indonesia, Kalimantan of Indonesian Borneo has 29 species, the largest diversity among other islands; following Sumatra (27 sepecies), Java (25 species), Sulawesi (14 species), Lesser Sundas (16), Mollucas (9 species) and Papua (17 species). According to the recent of Red List of Threatened Species of the International Union for the Conservation of Nature's (IUCN 2017), there are 18 species are listed as threatened species (under Endangered and Vulnerable status), 2 as Near Threatened (NT), 3 as Data Deficient (DD), 5 s as Least Concern (LC) and 12 species are Not Evaluated (NE). Five species listed as Endangered should have high prioritize for conservation: Fluvitrygon oxyrhynchus (Sauvage, 1878); F. kittipongi(Vidthayanon & Roberts, 2005); F. signifer (Compagno & Roberts, 1982); P. solocirostris Last, Manjaji & Yearsley, 2005; and Urogymnus polylepis(Bleeker, 1852).

Keywords: Review; Dasyatidae; Indonesian waters; Diversity; Conservation

Introduction

The Indonesian archipelago is one of the richest marine biodiversity areas in the world [1]. The country has 4.720 species of fishes, making one the greatest diversity of fish fauna in the world [2]. Many iconic group of fishes known collectively as the 'ray' occur in Southeast Asia, particuarly in Indonesian waters [3-5]. One of 'ray' is stingrays (family Dasyatidae), groups of small to very large myliobatiform fishes (adults from 22cm to 260cm DW) and distinguished by the following combination of characters: body variably depressed with a well-formed oval, circular or rhombic disc that fully incorporates head; snout angular to obtuse and sometimes very elongate; nasal curtain well developed, skirt-shaped, rectangular or bilobed; five gill slits; oral papillae usually present on floor of mouth; tail moderately stout to slender-based and more or less elongated (sometimes very elongate and whip-like); dorsal surface variably covered with dermal denticles, thorns and/or tubercles, smooth to very spiny and often with a median thorn row and/or a median denticle band; no dorsal or caudal fins; 1-4 prominent caudal stings, positioned on tail well posterior to pelvic fins; skin folds variably developed on the ventral and sometimes dorsal midline of tail; dorsal surface plain to strongly patterned, usually darker than ventral surface [6-9]. Recent phylogenetic studies, supported by morphological data, have provided evidence that the Dasyatidae is monophyletic and consists of four major subgroups, the subfamilies Dasyatinae, Neotrygoninae, Urogymninae and Hypolophinae; and a morphologically based review of 89 currently recognised species [6]. In this review, we summary and update current knowledge of the stingrays in Indonesian waters.

Diversity of Stingrays in Indonesian waters

Table 1 shows 40 valid species of stingrays that occur in Indonesian waters. This checklist is compiled and shortlisted from recent major references [6-8]. The fishes were divided within seven faunal regions of Indonesia, where faunal regions match administrative boundaries and has no political significance [10]. Conservation status covering global threatened species follows recent International Union for Conservation of Nature (IUCN) Redlist 2017 [11].

Two species have been added recently for Sumatran waters [12,13], Fluvitrygon oxyrhynchus and Urogymnus polylepis (Figure 1 & 2). Based on distribution of stingrays within seven faunal region of Indonesia, Kalimantan of Indonesian Borneo has nine species of stingrays found in Mollucas, indicate the lowest 29 species, the largest diversity among other islands; following Sumatra (27 sepecies) and Java (25 species). There are only number compare to other islands in Indonesian waters.

Conservation of Stingrays in Indonesian waters

The status of most of the world's rays have been assesed using a standard international system to characterise the risk of extinction of species: the International Union for the Conservation of Nature's (IUCN) Red List of Threatened Species [14]. Following recent IUCN (2017), there are 18 species are listed as threatened species (under Endangered and Vulnerable status), 2 species listed as Near Threatened, 3 species listed as Data Deficient, 5 species listed as Least Concern and 12 species as Not Evaluated (Table 1). Five species having high prioritize for conservation because listed as Endangered: Fluvitrygon oxyrhynchus; F. kittipongi (Vidthayanon & Roberts, 2005); F. signifer (Compagno & Roberts, 1982); P solocirostris Last, Manjaji & Yearsley, 2005; and Urogymnus polylepis. Four of these species are inhabit freshwaters. To secure the status of stingrays locally and globally, in addition to the adressing the issue of data deficiency, accurate species identification is needed, the strict enforcement of fishing and protection of measures, a significant increase in scientific observer coverage to monitor catches, and increase research on gear modifications, fishing methods, and habitat identification aimed at itigating bycatch and discard mortality of rays [14].

Note:

I. IUCN global status, CR = Critically Endangered, EN = Endangered, VU = Vulnerable , NT = Near Threatened, DD = Data Deficient, LC = Least Concern, NE = Not Evaluated.

II. Distribution abbreviations, S = Sumatara, K = Kalimantan (Indonesian Borneo), J = Java, S = Sulawesi, M = Mollucas, L = Lesser Sunda, P = Papua (West Papua, Indonesian Papua).

Conclusion

Recent status of stingrays (family Dasyatidae) in Indonesian waters are summarized here. This general review may give obvious diversity and conservation challenges. We supose that further research and monitoring are needed to clarify local status and distribution of stingrays in Indonesian waters, particularly in area where rarely explored.

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[wikiphuquoc]

Vinpearl Safari đăng cai tổ chức hội bảo tồn và phúc trạng động vật

Trong 4 ngày diễn ra hội nghị, từ 17/11 đến 20/11, các chuyên gia vườn thú đến từ Australia, Nhật Bản, Thái Lan, Malaysia, Indonesia, Myanmar, Philippines, Singrapore, Đài Loan (Trung Quốc) và Việt Nam… làm việc theo 5 chủ đề chính, gồm công tác chăm sóc và thuốc thú y trong vườn thú, công tác giáo dục và bảo tồn, thiết kế vườn thú và làm giàu chuồng trại, phúc trạng động vật và vấn đề đạo đức liên quan, công tác quảng cáo và truyền thông.

Hội nghị có nhiều nội dung đáng chú ý như tái thả vượn lông bạc, cứu hộ và phục hồi động vật hoang dã tại vườn thú Davao – Phillipines, huấn luyện hành vi của cá đuối nước ngọt khổng lồ (urogymnus polylepis) tại River Safari – Singapore, hoạt động “Sinh tố smoothie” cho sói bờm… Bên cạnh đó, các mô hình bảo tồn, phúc trạng động vật kiểu mẫu trên thế giới cũng được giới thiệu tại hội nghị, nhằm tối ưu những mô hình và phương pháp trong chăm sóc, bảo tồn và nâng cao phúc trạng động vật.

Đối với các vườn thú nói riêng và khu vực Đông Nam Á nói chung, bên cạnh những vấn đề giúp nâng cao phúc trạng động vật, duy trì tập tính hoang dã của loài, thì việc bảo tồn, nhân giống và tái lập đàn cho các giống loài động vật quý hiếm trên thế giới… luôn là mối quan tâm hàng đầu của các chuyên gia, nhà quản lý.

Riêng tại Việt Nam, Vinpearl Safari được cộng đồng quốc tế ghi nhận về công tác chăm sóc và nhân giống bảo tồn tê giác trắng tại Phú Quốc. Tháng 4, Vinpearl Safari Phú Quốc liên tiếp chào đón 2 cá thể tê giác trắng con chào đời, nhờ phương pháp ghép đàn và phối giống tự nhiên. Đây là sự kiện hiếm có đối với các vườn thú ở Đông Nam Á.

Trước đó, những trường hợp như cá thể hà mã sinh thành công tại Vinpearl Safari Nha Trang, bầy thiên nga đen quý hiếm có tỷ lệ sinh nở thấp được ấp nở hoàn toàn tự nhiên tại Vinpearl River Safari Nam Hội An… là những tín hiệu đáng mừng với công tác bảo tồn động vật tại Việt Nam. Với sự đầu tư quy mô, bài bản và tâm huyết, Vinpearl Safari hiện là hệ thống vườn thú hội tụ đầy đủ điều kiện tự nhiên, cơ sở vật chất và quản lý, môi trường sống… để các loài thú hoang dã, quý hiếm sinh sản, nhân tạo giống, đàn.

Với vai trò là một trong những vườn thú bán hoang dã có quy mô bậc nhất khu vực Đông Nam Á, Vinpearl Safari luôn tích cực và chủ động tiếp cận vấn đề nâng cao phúc trạng động vật, hợp tác với các đối tác có kinh nghiệm và thiện chí, như Tổ chức Phúc lợi động vật hoang dã – Wild Welfare, Hiệp hội Vườn thú Australia (ZAA)…

Vinpearl Safari cũng là một trong những vườn thú đầu tiên của Việt Nam phối hợp với Hiệp hội SEAZA thực hiện tập huấn, đánh giá để cấp chứng chỉ phúc trạng động vật quốc tế cùng với 4 vườn thú khác của Indonesia và Thái Lan trong năm nay. Chương trình hội nghị “Các vườn thú Đông Nam Á với công tác bảo tồn đa dạng sinh học và phúc trạng động vật” là sự kiện thường niên lần thứ 27 của SEAZA, và là lần thứ 4 được tổ chức tại Việt Nam.

Trong những năm qua, Vinpearl Safari bảo tồn, nhân giống và sinh sản thành công cho hàng loạt loài động vật hoang dã quý hiếm. Tính riêng tại Phú Quốc, trong 6 tháng đầu năm, có 239 cá thể mới ra đời, trong đó có nhiều loại động vật quý hiếm như hổ bengal, sư tử châu Phi, cầy mực, vượn cáo đuôi khoang, thiên nga đen, đà điểu, linh dương sừng thẳng Ả Rập, linh dương đen Ấn Độ… Vườn thú hiện có hơn 3.000 cá thể thuộc hơn 150 chủng loài, được sưu tầm, bảo tồn từ các động vật hoang dã quý hiếm địa phương, đồng thời quy tụ từ nhiều vùng địa sinh học đặc trưng trên thế giới như Nam Phi, châu Âu, Australia, Mỹ… như hổ bengal, bò tót, chuột túi, ngựa vằn, hươu cao cổ, hà mã, hồng hạc… Tại đây cũng có những động vật quý hiếm hàng đầu Việt Nam như tê giác, vượn cáo trắng đen, linh dương sừng kiếm Ả Rập…

source https://wikiphuquoc.com/vinpearl-safari-dang-cai-to-chuc-hoi-bao-ton-va-phuc-trang-dong-vat/