Biodiversity assemblages and conservation necessities of ecologically sensitive natural wetlands of north-eastern Bangladesh

135-148North-Eastern region of Bangladesh is very promising for freshwater capture fisheries, nevertheless, comprehensive assessment on faunal composition and diversity assemblages of natural wetlands are scant.This study identifies the occurrence, different biodiversity indices and composition of fish with various gear types by means of qualitative and quantitative approaches in Tanguarhaor and Dekarhaor. A total of 75 fish species were identified, of which 53 % were Cypriniformes, followed by Siluriformes (15 %), Perciformes (14 %), Channiformes (7 %) and Clupeiformes (4 %). Among the identified taxa 42 species were not threatened, 12 vulnerable, 11 endangered and 8 critically endangered. The values of diversity indices explicitly Shannon-Weiner (H'), Pielou evenness (J'), Margalef richness (d) and Simpson dominance (c) indices indicated that Tanguarhaorwasmore diversified and evenly distributed than Dekharhaor. For effective management of the haorscomprehensive stock assessment, establishment of fish sanctuaries, and combination of input and output control is suggested

Biodiversity assemblages and conservation necessities of ecologically sensitive natural wetlands of north-eastern Bangladesh

North-Eastern region of Bangladesh is very promising for freshwater capture fisheries, nevertheless, comprehensive assessment on faunal composition and diversity assemblages of natural wetlands are scant.This study identifies the occurrence, different biodiversity indices and composition of fish with various gear types by means of qualitative and quantitative approaches in Tanguarhaor and Dekarhaor. A total of 75 fish species were identified, of which 53 % were Cypriniformes, followed by Siluriformes (15 %), Perciformes (14 %), Channiformes (7 %) and Clupeiformes (4 %). Among the identified taxa 42 species were not threatened, 12 vulnerable, 11 endangered and 8 critically endangered. The values of diversity indices explicitly Shannon-Weiner (H'), Pielou evenness (J'), Margalef richness (d) and Simpson dominance (c) indices indicated that Tanguarhaorwasmore diversified and evenly distributed than Dekharhaor. For effective management of the haorscomprehensive stock assessment, establishment of fish sanctuaries, and combination of input and output control is suggested

Property rights in mangroves : A case study of the Mahakam Delta, East Kalimantan, Indonesia

Mangroves represent an important source of livelihood for many poor people acrossthe world. However, insufficient policy responses relating to mangrove conservation,combined with the lack of clearly defined property rights contribute extensively to theconversion of mangroves to alternative uses, in particular shrimp aquaculture. On thebasis of relevant theoretical perspectives on property rights, this Master’s thesisanalyses various formal and informal institutions and existing governancemechanisms that determine natural resources management in the Mahakam delta, EastKalimantan, Indonesia. By employing a qualitative participatory research approachthe case study explores how different institutions in Indonesia shape the local propertyrights regime in mangroves. The results show that the interplay between formal andinformal institutions involved in defining property rights, along with the lack ofcoordination among responsible government agencies, has resulted in the clearing ofone of the largest Nypah forests in the world for shrimp pond construction withinthree decades. Moreover, the study suggests that the current problem of mangrovedestruction will not be solved merely by declaring the Mahakam delta as a protectedarea or by assigning full ownership rights to the local people. On the contrary, thestudy suggests that the coordination and enforcement mechanisms should be enhancedin such ways that they simultaneously address both local peoples’ needs as well asecosystem integrity