scholarly journals Dredging-induced shell damages to hard clam (Meretrix meretrix): a Malaysian case study

2018 ◽  
Vol 32 ◽  
pp. 1 ◽  
Author(s):  
Tan Kar Soon ◽  
Julian Ransangan
Keyword(s):  
Shell Length ◽  
Fishery Management ◽  
Sampling Methods ◽  
Hard Clam ◽  
Meretrix Meretrix ◽  
Community Based ◽  
Awareness Programs ◽  
Negative Impacts ◽  
Hard Clams

The hard clam (Meretrix meretrix) is a popular edible shellfish in South and Southeast Asia, being heavily exploited by hand dredging in Marudu Bay, Malaysia. The current study was performed to evaluate the shell damages caused by this artisanal dredging gear. Samplings were conducted in triplicates at two sites using both hand dredging and hand collecting (control) sampling methods. The shell length and total weight, damage areas and breakage patterns of each clam were recorded. A questionnaire survey was conducted with local bivalve harvesters to gather information on the fishing pressure in Marudu Bay. Results revealed that the efficiency (fishing yield) of hand dredging gear was three times higher than hand collecting. However, hand dredging gear causes lethal shell damages to small hard clams (<3cm in shell length). Hard clam harvesting is the main occupation of most fishermen in Kg. Popok, but most of them do not comply with the minimum harvesting size established by the fishery department. Moreover, most of the stakeholders are not aware of the negative impacts of hand dredging to the sustainability of the hard clam fishery in Marudu Bay. Therefore, organizing more awareness programs combined with introducing community-based fishery management are highly recommended to promote the sustainability of this artisanal fishery.

scholarly journals Sex ratio, gonadal and condition indexes of the Asiatic hard clam, Meretrix meretrix in Marudu Bay, Malaysia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
LADITAH DUISAN ◽  
Gazali Salim ◽  
JULIAN RANSANGAN
Keyword(s):  
Sex Ratio ◽  
Shell Length ◽  
Condition Index ◽  
Habitat Destruction ◽  
Hard Clam ◽  
Meretrix Meretrix ◽  
Artificial Breeding ◽  
Artificial Seed ◽  
Hard Clams ◽  
Species Being

Abstract. Duisan L, Salim G, Ransangan J. 2021. Sex ratio, Gonadal and Condition indexes of the Asiatic Hard Clam, Meretrix meretrix in Marudu Bay, Malaysia. Biodiversitas 22: 4895-4904. Asiatic hard clam, Meretrix meretrix is one of the important shellfishery resources in Marudu Bay, Sabah, Malaysia. It is among the most popular clam species being widely traded in the local wet markets around Sabah, Malaysia. Unfortunately, the shellfishery management for this species has not been well established. In addition to overexploitation, habitat destruction is also one of the significant threats to this species due to the extensive land use of the coastal areas in Sabah. Hence, conservation and breeding efforts for this species are greatly required. Therefore, the current study was conducted to examine the sexual maturity of the clam with respect to shell length classes for artificial seed production purposes. For this study, a total of 86 clam specimens were randomly collected from mudflats in Marudu Bay. The specimens were utilized for gonad histological and condition analyses. The clams were grouped into three shell length classes; (3.00-4.99) cm, (5.00-6.99) cm, and (7.00-8.99) cm prior to the analyses. Results showed the natural stock of the Asiatic hard clams in Marudu Bay was dominated by females (1.39:1) over males with no hermaphroditism observed. The gonadal index was recorded higher among clams with shell lengths between 5.00 and 6.99 cm. The condition index analysis also recorded high (>4.0) for clams in all the shell length classes. The findings of this study suggest that the clams with shell lengths between 5.00 cm and 7.00 cm are already fully matured and can be utilized as a broodstock candidate for an artificial breeding program in the hatchery.

Sustainability of Micro-Hydrosystems — A Case Study

2009 ◽  
Vol 20 (4) ◽  
pp. 567-585 ◽  
Author(s):  
A.B. Chhetri ◽  
G.R. Pokharel ◽  
M.R. Islam
Keyword(s):  
Energy Systems ◽  
Energy System ◽  
Community Based ◽  
Global Environmental Problems ◽  
Global Environmental ◽  
Sustainable Energy Systems ◽  
Negative Impacts ◽  
Development And Management

Energy development and management has been a crucial subject due to recent concerns of energy shortages and increasing oil prices. Energy is not only the major driver of economic development but also a major precursor for global environmental problems due to emission of pollutants including greenhouse gases. The development of sustainable energy systems that do not have net negative impacts into ecology, economy and society has been given due considerations recently. In order to determine whether a particular energy system is sustainable, a set of criteria can be used to evaluate them. In this study, a decentralized community based micro hydro system in Nepal has been evaluated for its sustainability by using environmental, economic and social criteria. From the sustainability analysis, it is found that decentralized community based micro hydro systems are sustainable in the long-term. This model can also be applied to evaluate sustainability of any other energy systems of similar settings.

scholarly journals Impacts of culture survival rate on culture cost and input factors: Case study of the hard clam ( Meretrix meretrix ) culture in Yunlin County, Taiwan

2019 ◽  
Vol 51 (1) ◽  
pp. 139-158
Author(s):  
Chi‐Cheng Chang ◽  
Jung‐Fu Huang ◽  
Christian Schafferer ◽  
Jie‐Min Lee ◽  
Li‐Ming Ho
Keyword(s):  
Survival Rate ◽  
Hard Clam ◽  
Meretrix Meretrix

The Islamic Integrated Model for Drug Addict Treatment and Rehabilitation on Kratom Use Among Muslim Adolescents: A Case Study in Krabi Province, Thailand

2019 ◽  
Vol 10 (5) ◽  
pp. 479-487
Author(s):  
Sawpheeyah Nima ◽  
◽  
Yupa Somboon
Keyword(s):  
Group Discussion ◽  
Integrated Model ◽  
Drug Addict ◽  
Community Based ◽  
Program Leaders ◽  
Depth Interview ◽  
Religious Learning ◽  
Chief Officer ◽  
Islamic Faith

There are several medical drug addict treatment methods used by physicians and other health professionals worldwide. The community-based treatment and care for drug use and dependence have increased in popularity. However, little is known about whether or how Islamic spirituality model could be incorporated into formal treatment in the Muslim community. This study aimed to explore the Islamic integrated model for drug addict treatment and rehabilitation on Kratom use among Muslim adolescents in Krabi Province, Thailand. The focus group discussion and in-depth interview were carried out in chief officer, the staff of treatment service volunteers, program leaders, and families and friends of addicts during October 2017-December 2018. The results revealed that the implementation of integrated Islamic religious learning in the drug therapy session to grow the spiritual religiosity and lower relapse among Muslim youth who were previous kratom addicts. The Islamic faith-based treatment model could be declared the evidence of kratom recovery in community level.

Towards Training Librarian 2.0 through A Community-based Participatory Group Project: A Case Study

2013 ◽  
Author(s):  
Lu Xiao ◽  
Trina Joyce Sajo
Keyword(s):  
Participatory Approach ◽  
Group Project ◽  
Community Based ◽  
Design Decisions ◽  
Etude De Cas ◽  
Étude De Cas ◽  
User Centered

Librarian 2.0 adopts user-centered approach. This paper reports the case study of a community-based participatory approach for training librarian 2.0. The findings suggest that this approach allows the students to practice user-centered interactions, identify and integrate the user’s needs into design decisions, and develop ways of collecting the user’s feedbacks.Les bibliothécaires 2.0 adoptent une approche centrée sur l’utilisateur. Cet article présente une étude de cas sur une approche participative et communautaire visant à former les bibliothécaires 2.0. Les résultats suggèrent que cette approche permet aux étudiants d’interagir avec les usagers, d’identifier les besoins, de les intégrer dans leur processus décisionnel et de développer des moyens de recueillir les commentaires des usagers. 

Sign in / Sign up

Export Citation Format

Share Document