Ali Mashar

• IPB University

Bacillariophyta, also known as diatoms, are a group of microscopic algae found in marine aquatic environments. The presence of these diatoms is a bioindicator to determine the trophic state status of waters, including Jakarta Bay, which is known for the pollution phenomenon occurring in the area. Therefore, this study aimed to identify the abundanc...

Besides overfishing, other factors that influence the decline in blue swimming crab (Portunus pelagicus) production are diseases caused by parasites. Poor environmental conditions could trigger parasite infestation on their host. This study aims to identify ectoparasites morphologically based on the research location and to analyze the prevalence o...

Environmental DNA (eDNA) provides a non-invasive method for biodiversity monitoring in marine ecosystems. This study aimed to compare the effectiveness of 12S rRNA, 18S rRNA, and COI primers in assessing biodiversity in the intertidal zone of Ujung Genteng, Sukabumi, West Java, Indonesia. Water samples were collected up to 300m from the shore, and...

Amphipods are key detritivores in coastal ecosystems, and their behaviour and habitat selection can offer insights into their survival strategies. This study aims to investigate the substrate colour preferences and size variation in Traskorchestia georgiana, an amphipod species inhabiting sandy beaches. Experiment was done in August 2024 at coastal...

Tachypleus gigas is one of horseshoe crab species found in Indonesia, but does not have sufficient molecular biology information available. This study aims to predict the populations health of T. gigas from the waters of Langkat, Semarang, and Bintan; through analysis of haplotype diversity based on 16S rRNA gene markers. The observation was conduc...

Urban areas in tropical countries, particularly coastal and estuarine regions, are highly vulnerable. The dynamic nature of Jakarta Bay has raised concerns about the decreasing diversity of aquatic life. To address this, we have harnessed the power of cutting-edge environmental DNA (eDNA) technology to comprehensively inventory biodiversity potenti...

Groupers are one of the most important and commercial fishes; many of the species are classified as Life Reef Fish Trade (LRFT). The number of grouper species in these locations may be more diverse than at other sites. Identifying the species number of a grouper is essential for mapping reef fitness. However, morphological identification of grouper...

Small-scale fisheries, like spiny lobsters, are examples of open-access, common-pool resources that include intricate systems requiring effective management strategies. This research used Driver-Pressure-State-Impact-Response (DPSIR) modelling to analyze lobster fisheries (Panulirus spp.). The primary objective was to map the interaction and interc...

The scalloped spiny lobster (Panulirus homarus) is one of the dominant lobster species caught by fishermen in the west coast of Lampung Province. The spiny lobster fishing seems to be high pressure due to the catch result having a reasonable price for domestic and export market. However, little information on the biology of this species in the west...

The xiphosurids are a typical chelicerae group with massive morphological, anatomical, biochemical, and ecological documentation. Despite this study, information about extant horseshoe crab abnormalities is underexplored, especially in the Indonesian region. Thus, this study aims to investigate the abnormal horseshoe crab in Subang, West Java. This...

Parrotfish Scarus rivulatus is a Scaridae family strongly associated with coral reefs. The parrotfish utilization in the Seribu Islands Waters has been going on for a long time. This study aims to analyze the sex ratio, gonado somatic index, reproductive potential, and spawning pattern of the fish. Fish samples were collected for 12 months from Jan...

Parrotfish (Scarus rivulatus) is a species that can undergo sex change at a certain age and size (hermaphrodite protogynous). This study aims to analyze the process of sex change based on body color and gonadal tissue changes, as well as the gonadal development of the fish. Sampling was conducted monthly from January to September 2022. Fish samples...

The sperm whale (Physeter macrocephalus) is a protected marine biota in Indonesia. Molecular identification of sperm whales from the Sawu Sea (East Nusa Tenggara, Indonesia) was carried out using the 16S rRNA gene. This study aims to validate the species of the sperm whale (Physeter macrocephalus) in Indonesia using the partial cytochrome oxidase s...

Abstrak Danau Matano adalah perairan yang sangat dalam dan tergolong jenis danau yang bersifat oligotropik. Kondisi Danau Matano terancam mengalami degradasi akibat alih fungsi lahan yang secara tidak langsung dapat mempengaruhi habitat ikan opudi (Telmatherina prognatha Kottelat, 1991) yang merupakan ikan endemik danau tersebut. Penelitian ini be...

Lake Matano is a very deep water and is classified as an oligotropic lake type. The condition of Lake Matano is threatened with degradation due to land conversion which can indirectly affect the habitat of endemic fish. This study aims to determine the characteristics of the habitat in Lake Matano. The data collected in this study includes water qu...

The horseshoe crab is known as a living fossil because it has survived nearly 500 million years and is called a stabilomorph because it has a morphology that tends to be stable. The limitation of scientific information-related biological and ecological horseshoe crab in Indonesia is one of the problems in conservation efforts. To know more about th...

The use of gillnet fishing gear can increase the number of entangled horseshoe crabs, which may later become a major threat to their population. In this study, (1) the population size of entangled horseshoe crabs in different habitats was investigated with the aid of fishermen who used gillnets at their fishing grounds from August to October 2016 i...

Lake Lido is one of the habitats for Sunda river prawn (Macrobrachium sintangense), but the species was reported not to be found in December 2015-May 2017. This prawn has an economic value both alive for consumption and dead for bait. Shrimp identified morphologically as M. sintangense required reinforcement using molecular techniques for species c...

Telmatherina prognatha is an endemic freshwater fish found in Matano Lake. This fish has different morphometric characters and colors between the male and female species. They are widely distributed in the lake in a small number of populations. This research aims at distinguishing the morphological differences of the fish based on their morphometri...

Species with limited dispersal abilities are often composed of highly genetically structured populations across small geographic ranges. This study aimed to investigate the haplotype diversity and genetic connectivity of the coastal horseshoe crab (Tachypleus gigas) in Indonesia. To achieve this, we collected a total of 91 samples from six main T....

Red claw crayfish ( Cherax quadricarinatus ) is nationally and globally classified as an invasive species. One of the main distribution areas of this species is Lake Lido, Bogor regency resulting from private fish cage development. This invasive species is highly possible as either competitor, predator, pathogen, or parasite carrier to the native s...

Previous studies have reported that extant horseshoe crabs, including Atlantic and Asian horseshoe crab, spawned in intertidal zone during high tide season. Limited information about spawning nest of the horseshoe crab especially Tachypleus gigas in Indonesia has not been known yet. Moreover, according to the IUCN, the conservation status of T. gig...

Ponelo Island is located at the North Gorontalo District, Province Gorontalo, with a position close to the Wallace line. The impact of the position makes Ponelo Island having high biodiversity, such as macroinvertebrates. This study aimed to compare the biodiversity of macroinvertebrates living in artificial substrates form anthropogenic, seagrass,...

Freshwater crayfish (Cherax quadricarinatus) as an invasive species has high capability to adapt in most waters in Indonesia. The extant distribution of this species in Indonesia causes observation of morphological characters is important to be established. This study purpose is to compare the morphological characters of Cherax quadricarinatus from...

Widigdo B, Rifqi M, Mashar A, Nazar F, Wardiatno Y. 2020. The contribution of phytoplankton in the carbon adsorption and stock during shrimp culture in brackishwater ponds. Biodiversitas 21: 5170-5177. In environmental point of view, it is important to determine the potential of adsorption and stock of blue carbon during shrimp farming in ponds wit...

Most of the shrimp farming areas develop without detailed planning and strategies for achieving science-based production. The aim of this study was to develop the strategies required for optimal use of pond areas in the coastal zone, which is scientific-based and relatively easy and inexpensive to implement. The selection of prospective pond sites...

Alien crayfish species (Cherax quadricarinatus and Procambarus clarkii) have been found in some Indonesian area and demonstrated invasive species characters. Despite of their economy benefit the crayfish has potential ecologically disadvantage to be valuated. This study aimed to develop valuation method to estimate economical loss due to alien inva...

Of the four extant species of horseshoe crabs in the world (Xiphosura Limulidae), Indonesia have three species, i.e., Tachypleus tridentatus (Leach, 1819), T. gigas (O.F. Müller, 1785) and Carcinoscorpius rotundicauda (Latreille, 1802). The species identification based on morphology of especially the females of the two Tachypleus species can be dif...

Horseshoe crabs are living fossils found in Indonesia. This study examined the food habit of horseshoe crabs (Carcinoscorpius rotundicauda and Tachypleus gigas) collected from Balikpapan coastal waters, East Kalimantan. Horseshoe crabs were captured using gill nets and picked by hand along the Balikpapan coast. The width of the prosoma and the body...

Chadijah A, Sulistiono, Affandi R, Haryani GS, Mashar A. 2020. Food habits of endemic opudi fish (Telmatherina prognatha, Kottelat 1991) in Matano Lake, South Sulawesi, Indonesia. Biodiversitas 21: 1373-1378. The opudi fish (Telmatherina prognatha) is endemic fish in Matano Lake, South Sulawesi. This study aims to analyze food habits of the opudi f...

Horseshoe crab is an exotic and protected marine organism in Indonesia and is considered as the living fossil animal in the world. IUCN conservation status of Carcinoscorpius rotundicauda and Tachypleus gigas is still Data Deficient, and in Indonesia research on genetic population is lacking, if any. This study aims to reveal genetic diversity of C...

Shrimp farming in ponds leads to increase in greenhouse gas (GHG) emissions such as CO2 and CH4, due to land conversion and culture processes. The purpose of this study was to examine the rate of CO2, and CH4 cross water-air interface fluxes during shrimp farming in ponds with three different cultivation technologies (i.e. extensive, semi-intensive...

Mole crabs are the high economic value of aquatic biota that has an important role in the trophic structure, but the continuous use of it can result in disruption of the population. Therefore, accurate information is needed as a reference for determining the right management base. This study aims to analyze the phylogenetic relationships of mole cr...

Octopus (genus Octopus) is a member of family Octopodidae with two valid species in Indonesia. From fishery point of view octopus utilization has been started to increase, although, the effort to catch it is still limited. This research was aimed to identify octopus (genus Octopus ) collected from Palabuhanratu Bay morphologically, with validation...

Mapping of macro-plastic distribution in the water bodies is important due to the potential of its chemical particle decomposition. Macro-plastic abundance is constituted by population activities which is not accompanied by adequate waste management systems. This study aims to assess the distribution, abundance, and composition of macro-plastic in...

Neosesarma sp. is a species of Decapods from a family of Sesarmidae. Neosesarma sp. that has an important role in a food chain. The research aimed to estimate secondary productivity of Neosesarma sp. based on ratio of production and biomass. The research was conducted in 3 stations in Bintan Bay, Bintan Island, Riau Islands. Preliminary research wa...

The blue swimming crab (Portunus pelagicus Linnaeus, 1758) inhabits coastal waters with sandy or muddy substrates of Southeast Asia. Aquatic environment and fishing intensity might influence the variation in morphometric characters of species as a form of adaptation and might characterize the stock unit as well. This study was aimed to analyze the...

Scientist and environmentalist highlight the negative impact of a shrimp farm. The last decade analyzed numerous greenhouse gas emissions and aquaculture activities previously discussed. However, there are limited studies that reveal the emission of CO 2 and CH 4 related to aquaculture activities. The purpose of this study, therefore, is to examine...

The management of fish stocks is essential for the maintenance of a healthy and profitable fishery. One of important knowledge regarding the matter is the stock structure of the target fish, and fish morphology can be used to determine the stock structure. In fishery point of view, Indonesian waters are divided into 11 Fisheries Management Area. Th...

Opudi fish (Telmatherina prognatha) is an endemic fish that live in the Lake Matano. Growth pattern of Telmatherina prognatha is very important to be studied for species conservation and management effort. This study aimed to analyze size distribution, growth pattern and condition factors of the fish as a basic information for fish resources manage...

Lobster air tawar spesies Cherax quadricarinatus berasal dari perairan Australia dan Papua Nugini. Pengukuran morfometrik merupakan salah satu teknik dalam membedakan bentuk tubuh dari suatu populasi. Penelitian ini memiliki tujuan untuk menganalisis kekerabatan populasi pada lobster air tawar dari perairan Jawa Barat berdasarkan pendekatan truss m...

Rajungan (Portunus pelagicus) merupakan salah satu sumberdaya perikanan yang memiliki wilayah persebaran yang beragam di Indonesia, salah satunya adalah Laut Jawa. Wilayah persebaran yang beragam menyebabkan kondisi lingkungan yang berbeda, sehingga diduga dapat menimbulkan keragaman morfometrik. Tujuan dari penelitian ini adalah menganalisis kerag...

The blue swimming crab (Portunus pelagicus Linnaeus, 1758) inhabit in coastal waters with sandy or muddy substrates of South East Asia. The different of aquatic environment and fishing intensity on exploited population might influence the change in morphometric characters of species as a form of adaptation and might characterizing the stock unit. T...

The porcelain crab, Pseudoporcellanella manoliensis Sankarankutty, 1961 was collected in East Lampung, Indonesia, and the species is recorded from Indonesian waters for the first time. Pseudoporcellanella manoliensis was previously known from India, Malaysia, Singapore, Cambodia, and the South China Sea. The present specimens were caught by a fishe...

Lobster batu (Panulirus penicillatus) merupakan salah satu sumberdaya perikanan yang ada di Teluk Palabuhanratu. Informasi mengenai dinamika populasi lobster batu masih minim. Penelitian ini bertujuan menganalisis tingkat pemanfaatan lobster batu (Panulirus penicillatus) di Teluk Palabuhanratu, serta membandingkan ukuran saat pertama kali tertangka...

Biologi perikanan adalah bagian penting dan mendasar dalam mempelajari perikanan untuk dasar pengelolaan. Pengembangan ilmu biologi ikan sangat dinamis dan menarik, terutama dalam lingkungan Perairan tropis yang memiliki karakter stok ikan multispesies dan multilokasi. Dengan demikian, satu jenis ikan saja dapat hidup pada range yang luas dan memil...

Telmatherina is a genus of endemic fish of South Sulawesi. The aim of this research was to observe the fish composition and dominant catches of the Telmatherina in two different habitats, vegetated and rocky habitats. This research was conducted for 2 months, in July and in November 2017, in Matano Lake at two sampling sites in Salonsa Beach and ar...

Table S1. Populations of Cherax quadricarinatus sampled in Indonesia: locality name, type of habitat (artificial (pond, reservoir), natural (lake, river)), island name and GPS coordinates. Localities marked by an asterisk were adopted from a previous study (Patoka et al. 2016).

Dorippid crabs (Brachyura: Dorippidae) commonly live in sand or mud substrate at shallow coastal water. These crabs are a macro-benthos, mostly found in tropic, have no economic value, but have high abundance in blue swimming crab habitat and lack information in Indonesia. This study aims to determine diversity and species distribution of dorippid...

The redclaw crayfish, Cherax quadricarinatus, is a freshwater crayfish native to northeastern Australia and southern New Guinea. In 2016, the species was found for the first time west of the Wallace Line in Java, Indonesia and, based on climate matching, its further spread within Indonesian territory was predicted. In this study, surveys of selecte...

Dinamika populasi merupakan aspek penting sebagai dasar pengelolaan perikanan dan informasi tentang aspek tersebut pada lobster pasir masih minim di perairan Palabuhanratu. Tujuan penelitian ini adalah mengkaji aspek pertumbuhan, pola rekrutmen, mortalitas dan laju eksploitasi lobster pasir (Panulirus homarus) di perairan Palabuhanratu. Penelitian...

The main problem of coastal waters in Indonesia is generally caused by anthropogenic activities that promoting the accumulation of organic matters in sediments. It was well-known that organic matters in sediment might influence the macrozoobenthic communities. AMBI and M-AMBI are two recent developed indices which could be used to evaluate the heal...

Horseshoe crab is an important component of macro-benthos communities in the fine sand or mud substrate in coastal waters, both in the tropical and temperate region. This primitive animal consists of four species in the world, and three species can be found di Asian region, including Indonesia, namely Tachypleus tridentatus, T. gigas, and Carcinosc...

This work presents the diversity of lobsters collected from a survey in Palabuhanratu Bay, South of Java, Indonesia during July 2015 – December 2016. The survey was conducted monthly in a fish harbour. Information on the occurrence of previous survey was also included. A total of thirty one lobster specimens were collected from fishermen. Twelve sp...

p> ABSTRACT Mole crab is a benthic animal that live buried in sandy beach in the intertidal area. Mole crab has an important ecological role and also has economic value. The sandy beach in south of Cilacap and Kebumen is mole crab’s habitat. Mole crab exploitation in these areas has been increasing for consumption demand. To determine the signifi...

Two species of slipper lobster, Thenus indicus Leach, 1815, and Scyllarides haanii De Haan, 1841, are reported for the 1st time from the coastal waters of South of Java, part of the Indian Ocean. A total of two specimens, one specimen of T. indicus from Palabuhanratu Bay and one specimen of S. haanii from Yogyakarta coastal waters, were collected i...

Background: Three specimens of Puerulus mesodontus Chan, Ma & Chu, 2013 (Crustacea, Decapoda, Achelata, Palinuridae) were collected from Palabuhanratu Bay, southern Java, Indonesia. There is no previous record on the presence of the species in Indonesia. This finding represents the first record of this species in Java, Indonesia, and confirms that...

KEY WORDS The first Andaman lobster, Metanephrops andamanicus (Wood-Mason, 1891) (Crustacea Astacidea Nephropidae) record from south of Java waters, part of Indian Ocean is reported in this paper. A total of 3 specimens were collected at a fish harbor in Palabuhanratu bay in May 2015. Morphological characters are illustrated and described. This fin...

The sand crab of family Albuneidae is widely distributed along the Indonesian coast. The presence of the sand crab, Albunea symmysta (Crustacea: Decapoda: Albuneidae), is reported for the first time from Sumatra and Java, Indonesia. A total of 14 specimens were collected from March 2013 to December 2014 in the intertidal zone of the south-western c...

Marine mole crabs (Emerita emeritus) belong to a small genus of crustacean species. They are edible and could be developed to meet human nutritional needs. We determined the effects of various processing methods including boiling, steaming, and grilling on morphology and nutritional contents, and determined the optimal processing method. Fresh and...

The sand crab of family Albuneidae is widely distributed along the Indonesian coast. The presence of the sand crab, Albunea symmysta (Crustacea: Decapoda: Albuneidae), is reported for the first time from Sumatra and Java, Indonesia. A total of 14 specimens were collected from March 2013 to December 2014 in the intertidal zone of the southwestern co...

The sand crabs are crustaceans in Indonesian waters. The diversity of sand crabs in Indonesia is poorly understood due to the small number of studies that have been conducted. The present study revealed the diversity of Indonesian sand crabs, and assessed their phylogenetic relationships using the cytochrome c oxidase subunit 1 (CO1) and morphologi...

KEY WORDS Specimens of Hippa marmorata (Hombron et Jacquinot, 1846) (Crustacea Anomura Hip-pidae) were collected from several coastlines of Indonesia (Sulawesi, Lombok, Tual Island, and West Papua). The specimens represent the first record of this species in Indonesia and confirm its presence in the Wallacea Line region and to its eastern fringes....

Kepiting pasir atau undur-undur laut merupakan biota bentik yang hidup di pantai berpasir yang mempunyai nilai ekologi dan nilai ekonomi cukup penting. Adanya tekanan penangkapan mengharuskan adanya pengelolaan yang bijak yang disesuaikan dengan karakteristik populasi kepiting pasir. Informasi tentang jenis dan kelimpahan kepiting pasir penting unt...

ABSTRAKUndur-undur laut atau mole crab merupakan komponen penting dari komunitas makrobentos di pantaiberpasir terbuka, baik di daerah tropis maupun bermusim empat di seluruh dunia.Undur-undur lautmempunyai fungsi ekonomi dan ekologi.Salah satu jenis undur-undur laut yang banyak dijumpai diIndonesia adalah jenis Hippa adactyla.Karena fungsi ekonomi...

ABSTRAKUndur-undur laut merupakan bagian dari kelompok krustasea yang menghuni pantai berpasirdi daerah intertidal.Undur-undur laut mempunyai fungsi ekonomi dan ekologi.Salah satu jenisundur-undur laut yang banyak dijumpai di Indonesia adalah jenis Emerita emeritus.Mengingatpentingnya fungsi ekonomi dan ekologi undur-undur laut, maka kajian tentang...

Udang mantis jenis Harpiosquilla raphidea merupakan salah satu jenis krustase hasil tangkapan bernilai ekonomi pada beberapa daerah pesisir di Indonesia. Namun komposisi biokimia jenis ini belum banyak diketahui. Oleh karena itu, tujuan penelitian ini adalah untuk memepelajari secara kuantitatif unsure-unsur penting yang terkandung dalam daging uda...

We conducted a study on the biology of mantis shrimp Harpiosquilla raphidea collected from a mudflat at the mouth of Tungkal River, Jambi Province, Indonesia. Some biological information is described such as sex ratio, size frequency distribution of the population, and gonad maturity stage of females. Gonad development was also observed in a labora...