Co-operative Management of Local Fisheries: New Directions for Improved Management and Community Development

Julian Green explores how Singapore is planning to take a leading role in developing cross-region solutions in preparation for growth.

An ecosystem approach

River Choto Jamuna is an important and well-known river in north-west Bangladesh in terms of fish production and source of income for many fishermen living beside where this study has been conducted from January to December, 2012. This study revealed the existing fish species and their composition along with diversity, richness and evenness indices. A total of 63 species of fishes have been recorded belonging to 41 genera, 23 families and 9 orders. Cypriniformes was recorded as the most diversified fish group in terms of both number of species and individuals observed. Of all the fishes found, 41.27% species were threatened in Bangladesh including 15.87% vulnerable, 15.87% endangered and 9.52% critically endangered species. Overall values of diversity, richness and evenness indices were found to be 3.717, 6.954 and 0.897, respectively. Finally, considering all the findings, the establishment of fish sanctuaries to conserve available fish species, both threatened and non-threatened, naturally is recommended.

	 

	Key words: Fish diversity, Choto Jamuna, biodiversity, Shannon-weaver diversity, Margalef’s richness, Pielou’s evenness, Bangladesh.

https://www.academicjournals.org/article/article1380048053_Galib et al.pdf

Fish diversity of the River Choto Jamuna, Bangladesh : present status and conservation needs.

Exploring physical wetland vulnerability of Atreyee river basin in India and Bangladesh using logistic regression and fuzzy logic approaches

The South Asian Association for Regional Cooperation (SAARC) has eight members: Afghanistan; Bangladesh; Bhutan; India; Maldives; Nepal; Pakistan; and Sri Lanka. It was long the intention of South Asian politicians to establish a platform for regional cooperation of this kind, beginning with discussions in 1980. In April 1981 seven countries' foreign secretaries met in Colombo, Sri Lanka to formalize the concept of cooperation and identified five broad areas for regional cooperation (Afghanistan joined SAARC only in 2005). In August 1983, foreign ministers of the seven countries, at their first meeting in New Delhi, India, formally launched an Integrated Program of Action (IPA) by adopting a Declaration on South Asian Regional Cooperation (SARC). Following this framework, at the first summit held in Dhaka, Bangladesh on December 7–8, 1985, the charter establishing SAARC was adopted (ILO 2000).


Keywords:

India;
Pakistan;
regional development;
regional movements

South Asian Association for Regional Cooperation

Landmark-based morphometrics were examined to evaluate the population status of the endangered carp, kalibaus Labeo calbasu, collected from 2 isolated rivers (the Jamuna and Halda) and a hatchery. Morphometric characters along with truss network measurements and meristic counts were applied. Significant differences were observed in four (maximum body height, pre-orbital length, peduncle length, and maxillary barbel length) of 12 morphometric measurements, two (pectoral fin rays and scales above the lateral line) of 9 meristic counts, and four (8 to 9, 3 to 10, 2 to 10, and 1 to 11) of 22 truss network measurements among the stocks. For morphometric and landmark measurements, the 1st discriminant function (DF) accounted for 75.5% and the 2nd DF accounted for 24.5% of the among-group variability, and together they explained 100% of the total amonggroup variability. For the morphometric and truss network measurements, plotting DFs revealed high isolation of the stocks. The dendrogram based on morphometric and truss distance data placed the Jamuna and hatchery in 1 cluster and the Halda in another cluster, and the distance between the Halda and hatchery populations was the highest.

https://zoolstud.sinica.edu.tw/Journals/49.4/556.pdf

Landmark-based morphometric and meristic variations of the endangered carp, kalibaus Labeo calbasu, from stocks of two isolated rivers, the Jamuna and Halda, and a hatchery.

The annual global average catch shares of the anadromous Hilsa Tenualosa ilisha of Bangladesh increased rapidly from 74.5% all through 1984–2013 to 86.7% during the 2010–2015 periods. With a few exceptions, an increasing trend of Hilsa production over the last three decades was found in Bangladesh. Initially three options incorporating digital image measurements were compared to determine the best method for obtaining accurate length data. The length-frequency data measured from digital images showed that Hilsa have a moderate growth rate (K = 0.90 year−1) of up to 58.70 cm (L∞) TL. High fishing mortality (F = 2.83 year −1) and exploitation level (E = 0.67) suggest a slight overexploitation of the Hilsa fishery; the maximum sustainable yield (MSY) was estimated at 526,000 metric tons/year if the recommended TL at first capture (Lc) of 27 cm is adhered to. The present annual Hilsa catch is about 496,417 metric tons, which indicates the potential benefit of achieving MSY through sustainable fisheries management by regulating mesh size of nets and protecting brood fish. Size distribution of Hilsa within sanctuaries revealed a remarkable presence of juvenile fish during February–March in some areas, which suggests a need to readjust the fishing ban period from March–April to February–March. More fisheries management is necessary to reduce the exploitation level of Hilsa by 17% and at the same time increase the allowable Lc to potentially increase the MSY and CPUE. Subject editor: Donald Noakes, Vancouver Island University, Nanaimo, British Columbia *Corresponding author: jrhmn2@gmail.com Received March 10, 2018; accepted May 2, 2018 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 10:386–401, 2018

Catch Trend and Stock Assessment of Hilsa Tenualosa ilisha Using Digital Image Measured Length-Frequency Data

This study provides an overview of the current resources and fisheries status of the Chalan beel, and identifies the scope of opportunities to evolve existing fisheries management strategies, focusing on fish biodiversity conservation. Chalan beel is the largest, most important watershed in the North Central Bangladesh, and covers an area of about 375 km 2 during the monsoon season. The watershed serves about 5 million people, predominantly through fisheries and agricultural activities. Although considerably degraded over time, Chalan beel still supports a diverse ichthyofauna of major importance to the local economy and people’s livelihoods. The Chalan beel area incorporates 21 rivers and 93 smaller seasonal beels of varying size. Most of the rivers and beels are at risk of partial or total degradation, as a result of agricultural encroachment, siltation and other anthropogenic activities. During the study, ≈ 83% of the rivers, and 68% of the beels in the lean season, shrunk to 0‐5% of their maximum (monsoon) water-spread area during the dry season (i.e. critical levels for survival of many fish species). A fish catch survey was carried out in the main fishing season (July to December) over two successive years in the three most important catchment areas; namely, the Gumani, Baral and Katagang Rivers. A total of 72 sampling episodes yielded 9818 individuals, representing 114 fish species. The most abundant fish species during the 2-year study period were punti (Puntius sophore and Puntius ticto), followed by chanda (Chanda nama and Parambassis ranga), chapila (Gudusia chapra) and tengra (Mystus vittatus). The study results indicate at least 19 fish species once considered abundant can now be classified as threatened, with a possibility of local extinction. The mean fish catch was 2.08 ± 0.49 kg, and 1.29 ± 0.32 kg per hour per person, by suti jal (set bag net ‐ the most common gear used in the beel) in 2005 and 2006, respectively, with a significant (P < 0.05) variation among catches in months and years at all three sample sites. In 2005‐2006, the annual fish production in Chalan beel was 12 217 tonnes, being less than half of the production observed in 1982. The stakeholders identified several major causes they thought were directly responsible for the continued decrease in fish production and biodiversity of the beel area. Several management strategies were suggested by the same stakeholders, and the findings are discussed in the context of overall developments in the Chalan beel fisheries related to habitat and biodiversity management.

The Chalan beel in Bangladesh: Habitat and biodiversity degradation, and implications for future management

Sperm cryopreservation of the critically endangered olive barb (Sarpunti) Puntius sarana (Hamilton, 1822)☆

https://iopscience.iop.org/article/10.1088/1755-1315/414/1/012018/pdf

M. Nahiduzzaman

Papers

Landmark-based morphometric and meristic variations of the endangered carp, kalibaus Labeo calbasu, from stocks of two isolated rivers, the Jamuna and Halda, and a hatchery.

Catch Trend and Stock Assessment of Hilsa Tenualosa ilisha Using Digital Image Measured Length-Frequency Data

The Chalan beel in Bangladesh: Habitat and biodiversity degradation, and implications for future management

Sperm cryopreservation of the critically endangered olive barb (Sarpunti) Puntius sarana (Hamilton, 1822)☆

Hilsa fishery management in Bangladesh