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2 documents found tagged assemblage structure [X]
  • Title
    Fish diversity and assemblage structure in Ken River of Panna landscape, central India
    Type
    Journal Article
    Description
    Fish diversity and assemblage structure in relation to habitat variables were studied in 15 sites in Panna landscape, central India. The sampling was performed between February-April 2009. Fifty species of fishes belonging to 32 genera, 15 families and four orders were recorded from the study area. Cyprinids were the dominant assemblage members in all study streams (abundance ranges from 56.6-94.5 %). The cyprinid Devario aequipinnatus and the snakehead Channa gachua had highest local dominance (80% each) in Panna landscape. High Shannon and Margalef’s diversity was recorded in Madla region of Ken River. Similarity cluster analysis explained the study sites along Ken River (Gahrighat, Magradabri and Madla) had similar faunal assemblage. Canonical Correspondence Analysis (CCA) was performed to study the species association with a set of environmental variables. The CCA revealed that cyprinid abundance was associated with stream order, deeper habitat, flow and water temperature.
    Attribution
    Johnson J.A., Parmar R., Ramesh K., Sen S., Murthy R.S. (2012). Journal of Threatened Taxa 13(4) pp. 3161-3172; doi:10.11609/JoTT.o3024.3161-72
  • Title
    Diversity, distribution and assemblage structure of fishes in streams of southern Western Ghats, India
    Type
    Journal Article
    Description
    Diversity, distribution and assemblage structure of fishes were studied in 10 selected streams of southern Western Ghats. The sampling was performed between April 2001 and March 2002. Sixty species of primary freshwater fishes belonging to four orders, 13 families and 27 genera were recorded from the study area. Cyprinids were the most dominant assemblage members in all study streams. Maximum number of species, number of individuals and cyprinids were recorded from Thalayanai stream. More specialized forms Homaloptera santhamparaiensis, Glyptothorax madraspatanum, Noemacheilus guentheri, N. keralensis, N. semiarmatus and N. triangularis were recorded in Panniyar stream. High diversity was observed in Achankoil stream. Evenness index of similarity was uniform in all study streams. Similarity cluster analysis showed streams from nearby basins had similar faunal assemblages. Principal Component Analysis was performed to study the similarity of fish assemblages between the study streams. The analysis described clear pattern of segregation between Thalayanai and Karaiyar (east flowing) and Kallar and Achankoil (west flowing) streams. Thirty-nine Western Ghats endemic fishes were recorded from the study area. Current distribution and threats to endemic fishes are discussed.
    Attribution
    Johnson J.A., Arunachalam M. (2009). Journal of Threatened Taxa 10(1) pp. 507-513; doi:10.11609/JoTT.o2146.507-13