Dẫn liệu đầu tiên về ốc cạn ở một số đảo thuộc huyện Kiên Hải - tỉnh Kiên Giang=Fisrt data about landsnail in the island of Kien Hai district

Dẫn liệu đầu tiên về ốc cạn ở một số đảo thuộc huyện Kiên Hải - tỉnh Kiên Giang=Fisrt data about landsnail in the island of Kien Hai district - Kien Giang province

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Tác giả: Thanh Tùng Nguyễn, Văn Bé Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học (Đại học Cần Thơ), 2024

Mô tả vật lý: tr.97-109

Bộ sưu tập: Metadata

ID: 159186

Thêm vào giỏ

Land snail samples were collected qualitatively and quantitative in October, November 2013 and October 2014 at 49 locations of three islands (Hon Tre, Lai Son, and An Son islands) with four different habitats (natural forest, planted forest, long-term trees garden and short-term trees garden). Through analysis of 4,471 land snail individuals, in which 833 individuals were collected in 102 quantitative sites, the results showed that there were 25 species, classified into 20 genera, 12 families, 2 subclasses. Among these species, 2 species were firstly found in Vietnam (Quirosella knudseni Clench, 1958
Pleurodiscus balmei (Potiez & Michaud, 1838)), 9 species were firstly found in Mekong Delta (Vietnam) and 6 taxa were unidentified to species the scientific name. The subclass Pulmonata had the most various species (76 percent) and the families Cyclophoridae and Camaenidea had the most numerous species (5 species). The distribution area of land snails in the islands of Kien Hai district, Kien Giang province seemed to be more similar to surrounding nations than that in the North of Vietnam. Species composition, diversity index and density of snail were found to decrease as going from near to far islands with respect to the mainland. Cyclotus fasciatus Van Martens, 1864 and Quantula striata (Gray, 1834) were the dominant species.Mẫu ốc cạn được thu định tính và định lượng vào tháng 10, 11 năm 2013 và tháng 10 năm 2014, ở 49 địa điểm trên 3 đảo (Hòn Tre, Lại Sơn và An Sơn), trong 4 sinh cảnh (rừng tự nhiên, rừng trồng, đất trồng cây lâu năm và đất trồng cây ngắn ngày). Qua phân tích 4.471 cá thể ốc cạn, trong đó có 833 cá thể thu ở 102 ô định lượng, đã xác định được 25 loài thuộc 20 giống, xếp vào 12 họ, 3 bộ và 2 phân lớp. Trong số các loài trên có 2 loài mới gặp ở Việt Nam (Quirosella knudseni Clench, 1958
Pleurodiscus balmei (Potiez & Michaud, 1838)), 9 loài mới được ghi nhận lần đầu tiên ở Đồng bằng sông Cửu Long và 6 taxa chưa xác định được tên khoa học đến loài (Platyraphe sp., Megaustenia sp., Haploptychius sp.1, Haploptychius sp.2, Oxyloma sp., Semperula sp.). Phân lớp ốc có phổi có số loài phong phó nhất (chiếm 76 phần trăm tổng số loài), họ Cyclophoridae và Camaenidea có nhiều loài nhất (mỗi họ có 5 loài). Khi hệ ốc cạn các đảo ở khu vực nghiên cứu có xu hướng gần với khu hệ ở các nước lân cận hơn phía Bắc nước ta. Thành phần loài, chỉ số đa dạng và mật độ ốc cạn giảm dần ở các đảo từ gần đến xa đất liền, 2 loài Cyclotus fasciatus Von Nartens, 1864 và Quantula striata (Gray, 1834) chiếm ưu thế tuyệt đối về mật độ trên tất cả các đảo trong khu vực nghiên cứu.

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