�ݺ�ߣshows by User: AbdullaAlAsif1

Community awareness of benefits of Merchang mangrove forest, Terengganu, Malaysia

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Fri, 28 Jun 2024 06:56:13 GMT

The mangrove ecosystem, renowned for its global productivity, sustains livelihoods for millions, especially in Malaysia, through provisioning, regulatory, cultural, and supporting benefits. Despite extensive biological and environmental research on mangroves in Malaysia, scant attention has been given to their social aspects, particularly in Terengganu. This study addressed this gap by evaluating the awareness of Merchang residents in Terengganu regarding the tangible and intangible advantages of mangroves and their ecosystem services. The study unveiled intriguing insights through a structured questionnaire involving a total of >10% users of Merchang lagoon, including fishermen and mangrove forest beneficiaries. While provisioning services from the Merchang mangrove forest were not a primary reliance, a significant percentage of the community depended on it for fishery resources (67%), honey (37%), and fruits (26%). Moreover, there was a profound belief in the importance of the mangrove forest for regulatory services, such as erosion control (96%), climate control (93%), and air quality control (85%). Culturally, the mangrove forest played an integral role in knowledge systems, education, inspiration, aesthetics, social interactions, recreation, and ecotourism, as unanimously agreed upon by all respondents. Supporting services were also recognized, encompassing nitrogen cycling (67%) and soil formation with primary production (63%). Encouragingly, a majority of respondents expressed a keen willingness to actively participate in Merchang mangrove development, showcasing strong potential for community engagement. The study concludes that involving local communities in mangrove conservation efforts could bolster fishing resources, community livelihoods, wildlife, and ecotourism development.

Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomatic index in the Enigmatic Bornean Pygmy Halfbeak, Dermogenys colletei (Meisner,2001) (Beloniformes: Zenarchopteridae)

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Thu, 06 Jun 2024 15:41:04 GMT

The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.

Fish to finance: unraveling the economic threads of Bangladesh’s Blue Economy

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Fri, 26 Jan 2024 16:29:35 GMT

Bangladesh, with its extensive river network, vast coastlines, and rich maritime heritage, stands at the crossroads of a transformative Blue Economy. This comprehensive review explores the rich tapestry of Bangladesh's maritime journey. Commencing with a historical lens, it traces the nation's roots in fisheries, showcasing its transformation into a diversified and dynamic Blue Economy. The significance of this transition unfolds across the review, underscoring the sector's contributions to GDP, employment, and food security, while candidly addressing challenges such as overfishing and environmental impact. This work not only chronicles historical milestones but distills valuable lessons from both successes and setbacks, offering a nuanced understanding of the economic resilience embedded in Bangladesh's fisheries sector. Beyond a historical retrospective, the review navigates through the contemporary landscape, emphasizing diversification beyond fisheries. It illuminates economic opportunities in maritime trade, explores non-fish marine resources, and delves into the transformative role of aquaculture. The policy framework governing Bangladesh's Blue Economy comes into focus, dissecting government strategies, legal landscapes, and international collaborations. The review also champions environmental sustainability, highlighting the impact of Blue Economy activities on marine ecosystems and advocating for conservation measures, thus positioning Bangladesh as a steward of its rich maritime heritage. Financial mechanisms and investments emerge as pivotal elements, shaping the trajectory of Blue Economy projects, as evidenced by case studies that weave success stories and lessons learned into the narrative. Concluding with a forward-looking perspective, the study identifies emerging trends, growth opportunities, and strategies to tackle challenges, offering a comprehensive roadmap for sustainable development. In weaving together economic vibrancy, environmental stewardship, and future aspirations, this review illuminates Bangladesh's maritime odyssey as a beacon for the global Blue Economy community.

Successful hybridization between Clarias microstomus♂ and Clarias gariepinus♀

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Sun, 24 Dec 2023 16:11:51 GMT

Hybridization is a significant approach to breeding that enables the creation of new varieties that enhance genetic diversity. Through fish inter-species hybridization, it is possible to produce hybrids that can be utilized in aquaculture and stocking programs to enhance growth rate, transfer desirable traits between species, and combine the favourable attributes of two parents into a single progeny. The present study revealed the successful hybridization between Clarias microstomus (Ng, 2001) ♂ and Clarias gariepinus (Burchell, 1822) ♀ for the first time in the aquaculture industry. C. microstomus is a species of Clariid catfish endemic to the island of Borneo and C. gariepinus is an introduced species widely aquacultured throughout the southeast Asian region. The embryonic development of the hybrid offspring is described with the hatching percentage of 58.63% and the early survival rate for the first 72 hours for the larvae of 85.76%. The hybrids showed no signs of deformities and developed normally. The findings of the study provide a new high yield variety of catfish for farmers and aquaculture industry for increasing production and profit margin.

Freshwater gastropod diversity in the selected lotic environment, Betong, Sarawak, Borneo

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Tue, 19 Dec 2023 06:34:25 GMT

Freshwater Gastropoda can be considered as the biological indicator in ecosystems such as rivers, streams, lakes, and ponds. The objectives of this study are to identify freshwater gastropod species, diversity, and distribution along Sungai Penebak, Sungai Nanga Tiga, and Sungai Kabo in the Betong division. The study was conducted on 10 November 2020. A 50 m transect was laid on the riverbank of all three stations. The existing specimens were counted and collected from each sampling point and stored were taken to the laboratory for species identification. The diversity index and morphological study of freshwater gastropods were performed. Five species of freshwater gastropods belonging to four families were discovered. The five species of freshwater gastropods consisted of Sulcospira pageli, which shows great abundance, followed by Clea nigricans, Brotia costula, Pila ampullacea, and Vittina pennata. The diversity indices of collected Gastropoda species from the different stations, for instance, Shannon Weiner diversity index (H’), Pielou’s evenness index (J’), and Margalef’s richness index were assessed; where station 3 showed higher diversity of Gastropoda compared to other two stations. The information presented in this paper might be helpful for ecological wealth studies and considered as the baseline data for the stream ecosystem in Sarawak, Malaysia.

Macrofaunal diversity on the surface sediment of mangrove habitat adjacent to the seagrass beds at Punang Sari River Estuary (Malaysian Borneo), South China Sea

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Sun, 08 Oct 2023 15:06:29 GMT

Macrofaunal diversity and composition are essential to understanding the ecosystem structures and functions of mangroves in any dynamic estuarine coast. To understand the temporal distribution of macrofaunal community structures and diversity on the surface sediment in the intertidal mangrove forest next to the seagrass beds, this study was conducted at Punang-Sari-River estuary, Lawas, Sarawak (Malaysian Borneo), South China Sea. Sampling was done during post-monsoon, intermediate-September, premonsoon, and monsoon from July 2019 to February 2020. The mean macrofauna abundance was higher pre-monsoon, while Gastropoda Optediceros breviculum (L. Pfeiffer, 1855) was the most abundant (RA = 0.704). Important species index (ISI = 70.36) and percentage of contribution (64.97%) were also higher of this species than any other records from the site. The ANOSIM (Analysis of Similarity), Jaccard index and SIMPER (Similarity Percentage Analysis) analysis suggested that the highest species abundance similarity was observed between pre-monsoon and monsoon, while the highest dissimilarity was observed between intermediate-September and pre-monsoon (74.67%). Seasonal PCA, nMDS, and cluster analysis revealed that pre-monsoon and monsoon were comparable in species and individual abundance. The dominance (0.85) was found significantly higher (P < 0.0001) in intermediate-September, while Simpson (0.734), Shannon (1.56) and Evenness indices (0.528) were found higher in monsoon, followed by the higher Margalef richness indices (3.21) in post-monsoon. It was observed that the seasonal ecological parameters were found to be significantly (P<0.05) different, including the temperature, salinity, rainfall, pore water nitrogenous compounds (NO2, NO3 and NH3-N), phosphorus compound (PO4) and micro minerals. The Canonical Correspondence Analysis (CCA) results suggested that ecological factors influenced several species. Considering the few studies on mangrove macrofauna in Malaysian Borneo, further research on their trophic structures and food web interactions is very important to disclose their overall characteristics and ecosystem functions.

Population characteristics of the Japanese threadfin bream Nemipterus japonicus (Bloch, 1791) (Actinopterygii: Nemipteridae) at Bintulu coast, Sarawak, South China Sea

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Sun, 02 Jul 2023 10:02:04 GMT

Nemipterus japonicus (Japanese threadfin bream) is one of the most significant fish species throughout the Indo-Pacific regions. No previous studies on the population dynamics of N. japonicus have been carried out in the Eastern Malaysia (Malaysian Borneo). The present study focused on the population dynamics of N. japonicus from April 2013 to March 2014 in the coastal area of Bintulu, South China Sea. Local fishermen provided samples, which were then analysed. The FiSAT II software was used to evaluate the collected length frequency data. The asymptotic length (L ∞) and growth coefficient (K) were 26.78 cm and 0.85 yr-1, respectively. The growth performance index (ϕ'), total mortality coefficient (Z), natural mortality (M) and fishing mortality (F) were 2.785, 2.97, 1.63 and 1.34 per year, respectively. According to the estimates, the exploitation rate (E) for N. japonicus was 0.45, while the E 0.1 , E 0.5 and E max were determined as 0.72, 0.4 and 0.806, respectively. The obtained value of exploitation was less than E max, although slightly higher than E 0.5. The recruitment characteristics of N. japonicus have been stable throughout the year, with one peak pulse. The results contribute to the knowledge of the dynamics of N. japonicus populations and are important for the sustainable management of the Sarawak fishing resources.

Proximate and mineral composition of the long-spined Sea Urchin (Diadema setosum) roe

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Wed, 01 Feb 2023 15:09:38 GMT

Gonad of sea urchin is considered as food delicacy in many parts of the world due to high nutrition and mineral contents. Several species of sea urchins are available in Malaysia and reported from different habitat, including seagrass beds, coastal breakwater, coral reefs and other ecologically important habitats. The current study was undertaken to evaluate the proximate and mineral composition of long spined sea urchin (Diadema setosum) roe collected from breakwater of Terengganu, Malaysia in October 2019, November 2019 and January 2020. The samples were analysed for proximate including protein, lipid, moisture, and ash content of sea urchin roe. The macro, micro minerals and heavy metals were also evaluated including Ca, Fe, Zn, Cu, Co, Se, Mg, Ni, Pb, Al, and Cd. The result suggested that, long spined sea urchin (Diadema setosum) roe can be considered as good sources of food due to high percentage of protein (ranged between 36.21±0.44 and 50.14±4.63). The presence of heavy metal such as Ni, Pb, and Cd suggesting the breakwater environments were not good enough and the possible sources of heavy metals contamination in sea water environment must be stopped and eradicated. This study provides important information with regard to the proximate and mineral values of D. setosum, as well as the need for a better management of its habitat before D. setosum can be widely promoted as delicacy in this region.

Trends in seagrass research and conservation in Malaysian waters

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Wed, 01 Feb 2023 10:30:18 GMT

The seagrass ecosystems found in the marine and coastal areas, with substantial economic and ecological services and span all over the globe excluding the Antarctic region. The Coral Triangle and Southeast Asia are recognized as a worldwide hotspot of seagrass species and habitats, encompassing 10-21 species of seagrass in every nation , although the study, understanding, and quantity of publications on seagrass ecosystems are rather limited in the region, including Malaysia. Malaysia contains 18 seagrass species from three families, which occupy 16.8 km 2 of coastal area, where the study and discovery of seagrass species and meadows began in 1904 with the report of Beccari. All of the published papers reviewed reported on Malaysian seagrass-related research, which was divided into nine topic groups: biology and distribution, carbon sequestration, fauna, remote sensing, impact and pollution genetic study, restoration , microbiological investigation, and others. The extensive study of the seagrass ecosystem began in 1993, and we have identified 183 published papers from Scopus, 141 publications from Web of Science, and 42 from Google Scholar. However, the average trend of the number of publications from 1993 to 1999 was 0.71 ± 0.36, while from 2000 to 2022 was 7.70 ± 1.16 followed by the average trend of the yearly number of publications was 6.78 ± 1.08. The highest number of publications was found on faunal categories (43.17%), followed by biology and distribution (21.85%). The number of articles that were published on Malaysian seagrass meadows each year has been discovered to be rising, which indicates that the trends in seagrass study and publishing were progressively garnering the attention of researchers, academics, and the government. However, to better understand the sustainable ecology and ecosystem services provided by seagrass habitats, an emphasis on certain research niches, such as the genetic study of flora and fauna in seagrass meadows, microbial ecology, and restoration as well as conservation of seagrass species might be helpful.

First record of saucer scallop Ylistrum balloti (Bernardi, 1861) from equatorial South China Sea

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Tue, 17 Jan 2023 17:22:03 GMT

Ylistrum balloti is one of the Pectinidae species distributed within the Indo-Pacific region. Recently, 15 live specimens of Y. balloti were recorded from the continental shelf of Sarawak, Malaysia. The main morphological characteristics were displayed on the outer valve, these being a brown-red colour and a clear concentric pattern of thin brown lines. The prominent internal ribbing numbers on both valves also helped species identification. The preliminary report of Y. balloti revealed that the species is present in Sarawak waters and can be further explored in the future.

Culture and production of Lucilia sericata Meigen (1826) larvae for rearing stinging catfish Heteropneustes fossilis (Bloch, 1794) using poultry waste

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Wed, 21 Dec 2022 20:25:11 GMT

The fly larvae (Lucilia sericata) are being used as an alternative protein source in any kind of animal feed as it reduces the cost of preparation of feed. This current study focused on the physico-chemical and proximate properties of raw poultry waste, while this study also revealed the production process of fly larvae and the proximate composition of it. The poultry waste was collected from Suvro poultry farm, Sutiakhali, Mymensingh, then the physic-chemical properties of the raw poultry waste were determined using different procedures. Three treatments were considered for production of fly larvae, T 1 (3 kg), T 2 (6 kg) and T 3 (9 kg) in a 15 kg capacity tray with three replications. After production, the proximate composition were also measured of fly larvae. Physico-chemical properties such as, color, odor, texture, temperature, pH, total solids (TSS+TDS), chemical oxygen demand, dissolved oxygen, alkalinity, available N, available P, and fiber in raw poultry waste were determined and presented. Proximate composition such as, moisture, total N, total P, available N, total Ca, ash and crude fiber were found in significant amount in the poultry waste. It was found that T 3 (1350±68g) produced highest volume of live maggot compared to the other treatments, but T 2 (17.50±1.10%) produced highest percentage volume. The proximate compositions of fly larvae were assessed and found 56.60±0.25% protein value in it, suggesting that fly larvae could be the protein replacer in fish feed. The result of this study revealed cheap protein source in aquaculture production, such as production and rearing of stinging catfish Heteropneustes fossilis, and the findings might be helpful for cost reduction in aquaculture operation.

Replacement of fish meal by Lucilia sericata (Meigen, 1826) live larvae and powdered meal in production of stinging catfish Heteropneustes fossilis (Bloch, 1794) post-larvae

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Wed, 21 Dec 2022 20:23:24 GMT

Reduction of aquaculture operations and production cost is key to the success and profitability of this enterprise, while protein needs, especially the cost of fish meal, are cery expensive. The current study was conducted to investigate the post-larval production performance of Heteropneustes fossilis using Lucilia sericata maggot as a fish meal replacer in two ways, namely, live larvae and powder form. A 28 days growth trial was performed where five isonitrogenous diets for Heteropneustes fossilis post-larvae were experimented using live maggots and maggot meal, respectively. The proximate composition of each formulated diet, growth parameters of fish post-larvae, such as, weight gain, specific growth rate, protein efficiency ratio, apparent protein utilization, survival rate and the food conversion ratio were examined. After the experiment, the carcass composition of the experimental fishes were evaluated. The best final weight (1.61 g), weight gain (1.418 g), percentage of weight gain (739±1.18%), specific growth rate (2.63), protein efficiency ratio (2.29), apparent protein utilization (85%), survival rate (90%) and lower food conversion ratio (2.06) were observed in fish fed with 75% maggot meal as a substitute of fish meal. This study will help the aquaculture industry, especially the catfish culture in identifying an alternate source of protein and lowering the cost of aquaculture operation.

The molecular approach reveals the relationship among Venus clams (Meretrix spp.) Community in Malaysia

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Sat, 17 Dec 2022 12:56:54 GMT

Molecular study is important to detect variations and similarities among species from the same genus, in case if they do not encompass any morphological or physiological differences. The study was conducted to differentiate among species of Meretrix spp. (Meretrix lyrata, M. meretrix, and M. lusoria) obtained from two locations in Malaysia through the phylogenetic tree. The adductor muscle tissues were used to extract DNA and to perform other procedures; the samples were subjected to analyses using PCR and gel electrophoresis. The multiple sequence comparison was conducted by MUSCLE and the phylogenetic relationships were established using Maximum Likelihood (ML) statistical methods with MEGA 6.0 statistical software. M. lyrata samples showed 99% similarity to the three accessions sequence, where M. lyrata indicated 87% similarities, and M. meretrix showed not more than 89% similarities from the deposited sequence. The nucleotide base composition sequences consisted of the mean of Thiamine (T) 37.9%, Cytosine (C) 15.4%, Adenine (A) 27.4%, and Guanine (G) 19.4%. Maximum Likelihood (ML) analysis was conducted using the Tamura 3-parameter model to establish five major clades on Meretrix spp. and two out-groups clades significantly different from the Meretrix spp. These major clades were closely related to each other at the 50% evidence of bootstrap, which grouped as genus Meretrix. The present study on Meretrix spp. from the Sarawak locality was able to differentiate COI sequences between M. lyrata, M. meretrix, and M. lusoria. M. lusoria was close related to M. meretrix with strong bootstrap supporting evidence at 96% scoring. Moreover, M. lyrata was inferred as the ancestor to M. meretrix, and M. lusoria from Sarawak, Malaysia.

Disappearance or overlooked or untouched? - A brief history of aquatic gastropods of Malaysian Borneo

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Thu, 15 Dec 2022 17:00:19 GMT

The aquatic gastropods (marine and freshwater) in Malaysian Borneo (MYB) have an ancient history of 255 years, while the first record was observed in 1767 by the pioneer Carl Linnaeus. Over time, many European, native taxonomists and conservationists have worked on the diverse group of gastropods in the Malaysian part of Borneo (states of Sabah and Sarawak). No previous work has been conducted to assess the historical status of this particular class of Mollusca. The study objective was to reveal the types of aquatic gastropods and the number of published research and expeditions conducted in MYB. The bibliometric analysis found 145 research publications mentioning the names of the region and reporting at least one gastropod species from this geographic region. Over the history of 255 years, a total of 559 gastropod species were reported by different research groups. Between 1767 and 1900, a total of 150 gastropod species were reported, followed by 79 species from 1900 to 2000 and 330 species from 2001 to 2022. The Grubbs test (p<0.05) identified outlier years for the reporting of gastropod species from MYB with 54 new species each in 2011 and 2020 and 39 species in 2001. Over the history of aquatic gastropod research in MYB, the taxonomists making the greatest contribution were Han Raven and his colleagues from Naturalis who reported 111 new species from the region, followed by Nur Leena Wong from Universiti Putra Malaysia (54 new species). The results suggested that reporting of new species from MYB is increasing, which may reflect the many unexplored sites and suggests the existence of as yet unrecorded species in this ecoregion. In this regard further expeditions and research should improve estimates of the true number of aquatic gastropod species in this area. These results can help the regional governments in making a regional biodiversity database as well as in taking decisions regarding aquatic gastropod research and management.

A ray of hope in the darkness: What we have learned from Yangtze giant soft-shell turtle Rafetus swinhoei (Gray, 1873) conservation?

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Sat, 29 Oct 2022 17:52:21 GMT

The Swinhoe's softshell turtle, Rafetus swinhoei (Gray, 1873),) is one of the world's largest freshwater turtles, and possibly the most endangered turtle species on the planet (Stanford et al., 2018). It has an overall length of over 100 cm and a width of up to 70 cm, and it can easily weigh up to 70–100 kg, maximum weight was recorded at 169 kg (Solimine, 2013; Trong, 2018). Despite its enormous size and unusual look, this species is incredibly secretive and only comes to the surface to breathe, preferring to remain submerged deep down. For this species, there is very little ecological information, and the remaining distribution is unclear. This could explain why it's so difficult to positively identify and confirm occurrences of this species in the wild (Trong, 2018). If we look back to the history and biogeography of this species, it can be found that the existential records were documented in the historical literature of the Chinese and Vietnamese dynasties. This species was once thought to only live along the Red River in China and Vietnam, as well as the lower Yangtze River floodplain in China, but its current population size is estimated to be just one wild individual of undetermined sex and a solitary captivity male in Suzhou Zoo, China. Although recent thorough searches in Yunnan, China, and Vietnam failed to confirm the presence of more wild specimens, some sightings were reported until around a decade ago (Stanford et al., 2018), giving hope that more individuals may yet exist in Vietnam.

Symbiotically snapper shrimp Anchistus custoides Bruce, 1977 (Decapoda: Palaemonidae) inhabiting the mantle cavity of the pen shell (Bivalvia: Pinnidae)

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Thu, 27 Oct 2022 07:17:21 GMT

Snapper shrimp is a symbiotic organism usually hidden under the rocks, sponges and pen shells in the seagrass and coral habitats. The relationship study within snapper shrimp and pen shell was conducted from Merambong shoal, one of the biggest seagrass beds in peninsular Malaysia. A total of 40 individual pen shells were collected randomly and four species of pen shells were identified. 40 Anchistus custoides were found inhabiting symbiotically in the mantle cavity of the pen shell as solitary males and females and heterosexual pairs. Pen shell, Pinna bicolour and Atrina vexillum recorded the highest average SH 217.79±53.15 mm, SV 2.62±1.36 dm3 and SH 164.10-224.78 mm with the SV 1.18±0.43 dm3, respectively compared to the other species. The size of Anchistus custoides ranged from 15.00 to 20.00 mm in length and it was determined to be female due to the presence of eggs in the pleopods. The length of the cephalothorax and its length were highly related (rs=0.563, p≤0.01, N=40) and found wider in females. A little difference in size between the left and right chela in males of identical length was noticed, although the left chela is much bigger than the right. The significant relationship (rs=0.450, p≤0.01, N=40) between the pen shell length and shrimp (male-female) length revealed that the size of the shell is important to be hosted the snapper shrimp in the shell cavity.

Diversity of fisheries in Sarawak, Northwest Borneo: Present status and conservation issues

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Thu, 30 Jun 2022 06:52:35 GMT

Information on fisheries resources in East Malaysia is scarce and poorly known. The current review aims to compile a checklist of fisheries resources in the Northwest Borneo (Sarawak, Malaysia) from available published literature, address the resources' present status, and suggest future monitoring needs for selected critical species. The study also aims to determine several Sarawak land-use issues that are in flux and responsible for habitat degradation. Five hundred sixty-four species belonging to 123 families and 32 orders were recorded from Sarawak waters. Freshwater fish species comprised 48.0% of the total, followed by a marine (36.6%), marine-euryhaline (12.9%), and brackish water (2.5%) species. Of this, Cyprinidae was the most dominant group accounting for the greatest number of species (82 species), followed by Balitoridae (34 species), Bagridae (21 species) and Penaeidae (21 species). Therefore, available fisheries resources should be managed carefully as 48 species (9.0%) are currently vulnerable to extinction. Furthermore, the presence of 20 alien species in Sarawak water bodies also requires attention from the authorities due to the potential disruption of aquatic ecological balance. Changing land use issues in Sarawak such as forest degradation, agricultural expansion, peatland deforestation and conversion, logging, destruction of mangrove forests, and construction of hydroelectric power dams and flood mitigation channels pose significant challenges to fishery management in Sarawak. Our study documents the priority of fishery monitoring and conservation in Sarawak water bodies to ensure sustainable management of fisheries resources.

Availability and potentiality of small indigenous species of fish throughout the year in South-Western region of Bangladesh

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Tue, 21 Jun 2022 17:44:22 GMT

This study was conducted with aiming to know the present status of small indigenous fish species (SIS) in Oxbow Lakes/baors and rivers as well as the availability of SIS of fish and their potentiality in the study area. Regular data were collected from some important fish landing center cum markets, Oxbow Lakes and rivers of the study area. The availability of small indigenous species (SIS) of fish declined to a great extent over the years and many of them are rare or endangered due to death of rivers and baors were brought under aquaculture. Besides these, Many of SIS of fish were being increasingly used as trash fish for fish feed purpose. As an over populated country, demand of SIS of fish is increasing day by day. After 1990s almost all Oxbow Lakes have been gradually trying to bring under aquaculture through local community or Department of Fisheries. The most significant message of this study is that, some vulnerable and endangered SIS of fish are locally abundant both in fish landing center, baors and rivers. So they must be conserved for their bioavailability and nutrition throughout the country that would be most intelligent efforts in favor of global ichthyo-biodiversity conservation.

Socio-economic conditions of the fish farmers in Jessore, Bangladesh

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Tue, 21 Jun 2022 17:40:23 GMT

The study was conducted the fish farmers in some selected area at sadar upazila in Jessore under the district of Jessore from September to December 2013. A total of 100 fishermen were selected by stratified random sampling method and interviewed. The average me mbers of single family were 5-6 people per household. Single families were much more (62 %) than joint families. Most of the fish far mers were Muslims 92% and few of them were Hindus 8%Most of them had the secondary educational background and some of them with different levels of higher education. It was found that the number of school going children was 2-3 per house. Full katcha (17 %) houses were few, while the semi-pucca (40%) and pucca (43%) houses were more abundant. Regarding health and sanitation, 31% fishermen reported to suffer fro m gastric and 17% suffered from fever. Most of the interviewees were found to take credit facilities from different sources for the subsistence of their family and their venture. The 98% were found to have their tube-wells, others using Governmental tube-well, or those belonging to schools or neighbors However, they need more institutional, organizational, and technical and credit support for their better socioeconomic and sustainable livelihood.

Socio-economic condition of fish fry and fingerling traders in greater Jessore region, Bangladesh

AbdullaAlAsif1@slideshare.net(AbdullaAlAsif1) — Tue, 21 Jun 2022 17:38:41 GMT

The present study was conducted to assess the livelihood status of fish fry and fingerling traders and socioeconomic condition in the greater Jessore, Bangladesh from April 2013 to September 2013. Data were collected through the use of well-structured questionnaire from the selected area. 73% of traders have single family but only 27% have joint family. 45% fish fry and fingerling traders family has four members. 20% family has five members, 14% family has six members, 12% family has three members 9%family has seven to eight members respectively. 92% traders has own bank account but only 7% traders uses their bank account when they trade fry and fingerling. 87% traders have secondary business like rickshaw business, fruit business, cloth business, fish trading etc. Among 300 fish fry and fingerling traders the sanitation facilities are present 100%. It was found that 69% and 31% of fish farmers used semi-pucca and pucca toilet respectively. Among 300 fish fry and fingerling traders 78% of traders have own house but only 22% of trader live in rental house or place. 46% of traders have institutional education that range from primary to higher education and other 54% of traders have no experience in education. In case of illness 58% of traders and trader's family goes to government hospital, 24% uses private clinic, 15% traders are uses local village doctor and another 3% does not get any treatment or not require no treatment. 93% traders have television, 5% house consist radio and another 2% house no instrument for entertainment. Only 10% trader wants their son and grandson engages with this fish fry and fingerling trading profession. The average monthly income of traders in the peak season is 18000 taka and off-peak season the income is less than 7000 taka per month.