Sonja Kleinertz

Bogor Agricultural University | IPB · Faculty of Fisheries and Marine Sciences

Grouper are demersal fishes that can be found in tropical and subtropical waters. In Indonesia, one of the areas where grouper production takes place in Saleh Bay, a semi-enclosed water with small islands, coral reefs and a high diversity. Information’s about the population and abundance of grouper species in Saleh Bay are currently limited. The be...

The Saleh Bay is one of the bays in West Nusa Tenggara utilized as the grouper fishing ground. However, in the previous spawning potential ratio study, some grouper species have been overexploited in Saleh Bay. This study aimed to estimate the status of grouper utilization with a catch per unit effort (CPUE) approach and the spatio-temporal fishing...

Purpose The stomachs and spiral valves of sharks and rays were examined for their trypanorhynch (Cestoda) parasite fauna and dietary items to infer feeding ecology. In Indonesia, sharks and rays have been experiencing increasing awareness and conservation in the recent years due to high fisheries activities and to avoid future species extinction....

Background The most convincing species of Allopodocotyle Pritchard, 1966 (Digenea: Opecoelidae) are known overwhelmingly from groupers (Serranidae: Epinephelinae). Six species of Allopodocotyle have been reported, collectively, from species of Cromileptes Swainson, 1839, Epinephelus Bloch, 1793 and Plectropomus Oken, 1817. These are A. epinepheli (...

Mud crabs (Scylla serrata and S. olivacea) are important fisheries resources, but their population in nature is decreasing due to anthropogenic activities, like the deforestation of mangrove forests. Hence, it is crucial to conserve this marine biota for future sustainable use and to conserve our marine biodiversity. Conducting studies on the biolo...

Waste from industrial activities can be a source of pollution for the waters of Banten Bay. One source of these pollutants are heavy metals. High concentrations of heavy metals in waters can pollute the aquatic environment, endangering all organisms. Heavy metals can accumulate in aquatic environments and living organisms such as fish. The greenbac...

This book presents a history of marine fish parasitological research in Indonesia, including a checklist of fish parasites in Indonesian mariculture facilities. This checklist’s records include 104 parasite taxa (24 taxa could not be identified to species or lower taxon level, e.g. Trematoda indet.), belonging to ten parasite phyla (Euglenozoa, Myz...

Despite being an important component of the marine ecosystem and posing health risks to human seafood consumers, fish parasites in Indonesia have yet to be adequately described. Here, we analyzed the diet and metazoan parasite fauna of seven commercial fish species ( Alectis indica , Carangoides chrysophrys , Johnius borneensis , Mene maculata , Tr...

Despite being an important component of the marine ecosystem and posing health risks to human seafood consumers, fish parasites in Indonesia have yet to be adequately described. Here, we analyzed the diet and metazoan parasite fauna of seven commercial fish species (Alectis indica, Carangoides chrysophrys, Johnius borneensis, Mene maculata, Trichiu...

The rapid development of Indonesia over the past 20 years and also its increasing negative impact on the environment are by far best to be seen at the metropolitan area and the corresponding coastal ecosystems of Jakarta. All the information and facts reported in this chapter regarding the environmental state of Jakarta Bay demonstrate impressively...

The aim of the present study was to identify the parasite fauna of cultured rainbow trout (Oncorhynchus mykiss Walbaum, 1792) and Arctic charr (Salvelinus alpinus (L.)) from a flow-through aquaculture system at Lake Tollense in northern Germany. The fish were sampled during different seasons in 2018 from an open freshwater raceway. For rainbow trou...

The use of small islands for marine tourism is one of Indonesia's development strategies. The carrying capacity (CC) of islands is an essential parameter for achieving sustainable tourism management and development. CC can be incorporated into policy models and management strategies to reduce the impact on tourist areas. This study aims to assess t...

The study of zoonotic parasites is of extreme importance, because they can cause diseases in humans and can negatively impact the marketability of fisheries products. The present study aims to determine the infection patterns of helminth parasites infecting mackerel tuna in Banten waters, as well as to clarify possible negative impacts to its fish...

Ectoparasites that infest Portunus pelagicus can have negative impacts on host health. This study aims to determine the infection patterns of ectoparasites of P. pelagicus, such as prevalences, intensities, and (mean) abundances in relation to its pathogenic impacts. A total of 93 crabs were sampled from fishermen in Demak and East Lampung from Oct...

The paper aims to elucidate the physico-chemical characteristics of the shell of mangrove horseshoe crabs (Carcinoscorpius rotundicauda) and determine the compilation matrix for the first time. The shell composition matrix of C. rotundicauda has never been studied in detail before, especially the shape of the foam, the chemical composition, the fun...

Purpose Fish parasites can cause diseases in humans and lead to commercial losses in fisheries and aquaculture. The objectives of this study were to analyze E. ongus’s parasite fauna regarding food safety and parasite transmission risk between Epinephelus species and test whether E.ongus populations can be distinguished by their parasite community....

Article about DAAD Long Term Lectureships on Marine Sciences in Indonesia

Purpose: To date, little is still known on parasite infections affecting free-living large whale populations worldwide. Data presented should be considered as a baseline study for future monitoring surveys on endoparasites affecting whales, thereby enhancing investigations on impacts of zoonotic parasitoses not only on vulnerable or endangered bal...

Tuna fisheries are the most valuable fisheries in the world, with an estimated market value of at least US$42 billion in 2018. Indonesia plays an important role in the global tuna fisheries and has committed to improve its fisheries management; therefore, a pilot of long-term spatial-temporal data bases was developed in 2012, however none have util...

Overfishing is a major threat to the survival of shark species, primarily driven by international trade in high-value fins, as well as meat, liver oil, skin and cartilage. The Convention on the International Trade in Endangered Species of Wild Fauna and Flora (CITES) aims to ensure that commercial trade does not threaten wild species, and several s...

Data of landed sharks at Tanjung Luar auction that had been used for this study. (XLSX)

Questionnaires have been used to interview shark fishers, collector, traders, and processors. (DOCX)

A new endoparasitic monogenean of Paradiplectanotrema Gerasev, Gayevskaya & Kovaleva, 1987, Paradiplectanotrema klimpeli sp. nov., is described from the southern Balinese coast, Indonesia. The new species is much larger, wider and characterized by the longest dorsal anchors compared with the congeners. Ventral anchors and ventral bars are the small...

An endoparasitic monogenean was identified for the first time from Indonesia. The oesopha-gus and anterior stomach of the croakers Nibea soldado (Lacé pède) and Otolithes ruber (Bloch & Schneider) (n = 35 each) sampled from the South Java coast in May 2011 and Joh-nius amblycephalus (Bleeker) (n = 2) (all Sciaenidae) from Kedonganan fish market, So...

Calculation of best fitting model for phylogeny studies. https://figshare.com/s/75cc37ed9297dc11d983. (XLS)

Comparative linear measures for Pseudempleurosoma haywardi sp. nov. from the type host Nibea soldado (Sciaenidae). All measurements in μm, https://figshare.com/s/75cc37ed9297dc11d983. (XLSX)

Comparative linear measures for Pseudempleurosoma haywardi sp. nov. from the additional host Otolithes ruber (Sciaenidae). All measurements in μm, https://figshare.com/s/75cc37ed9297dc11d983. (XLSX)

Confocal photos of the haptor of Pseudempleurosoma haywardi sp. nov. Confocal microscopy illustrations of the opisthaptor with hooks, anchors and bars (dorsal bar concave anterior) (A), with focus on the inner two (of seven) pairs of hooks, partially overlaid by the ventral anchor with both its bars (B) and the same in detail (C), https://figshare....

Alignment of sequences. https://figshare.com/s/75cc37ed9297dc11d983. (TIF)

Permission to use Fig 4. https://figshare.com/s/75cc37ed9297dc11d983. (TIF)

The parasite fauna of Epinephelus coioides can be used as an indicator to assess different aquaculture systems. A total of 133 E. coioides were collected from fishermen (wild fish) and marine fish farms (net cages, pond farms) in the Gulf of Tonkin (Ha Long, Cat Ba and Nghia Hung), Vietnam in 2013 and 2014, and examined for the presence of protozoa...

Fischerei & Fischmarkt in M-V • 2 /2017 45 Aus der Forschung Fortsetzung des iMTA-Artikels aus Fischerei und Fischmarkt in M-V 01/2017 3 Projektergebnisse UP 3.3. Stoffmengenbilanz und Modellierung Die betrachtete offene Netzkäfiganlage mit Regenbo-genforellen (Oncorhynchus mykiss) vor Nienhagen (westliche Ostsee) wurde im Projekt Baltic IMTA zu ei...

Indonesia at the centre of marine biodiversity lacks information on fish parasites. During a sampling of 136 teleost species from Indonesian waters, 22 of them were infected with larvae of Anisakis Dujardin, 1845, a genus with zoonotic potential. We genetically identified 118 worms, provide a revision of all available sequences of the ITS-1, -2 and...

Im vorgestellten Pilotprojekt konnte anhand der Nährstoffanalysen erstmalig eine Stoffmengenbilanzierung für eine kleinskalige Netzgehegeanlage in der westlichen Ostsee vor M-V aufgestellt werden. Unsere Untersuchungen zeigen, dass bei Integration von Muscheln und Algen in unmittelbarer Nähe einer solchen Anlage anfallende Nährstoffe in Form von St...

Die Möglichkeiten, die sich mit der Nutzung von inte- grierten Aquakultursystemen ergeben, sind in Deutsch- land bisher nicht ausgeschöpft. Strenge Reglementie- rungen und Umweltauflagen, begrenzter Zugang zu Wasser(-flächen), hohe Investitionskosten, abträgliche klimatische Bedingungen sowie eine kritische Haltung der Öffentlichkeit gegenüber d...

Besnoitia besnoiti is an obligate intracellular and emerging coccidian parasite of cattle that mainly infects host endothelial cells during acute infection. We here analyzed early innate immune reactions of B. besnoiti-infected primary bovine umbilical vein endothelial cells (BUVEC). B. besnoiti infections significantly activated BUVEC since the ge...

In this study we analysed fecal bacterial communities and parasites of three important Indonesian fish species, Epinephelus fuscoguttatus, Epinephelus sexfasciatus and Atule mate. We then compared the biodiversity of bacterial communities and parasites of these three fish species collected in highly polluted Jakarta Bay with those collected in less...

Number of raw sequence reads, merged paired reads, post-QA/QC sequence reads, and number of taxonomically classified reads. The light grey and dark grey dashed lines represent the average number of raw sequence reads and taxonomically classified sequence reads across all samples. (TIFF)

Rarefaction curves. (TIFF)

The objective of this study was to assess the environmental conditions of a heavily polluted marine habitat using descriptors of fish parasites. Epinephelus coioides from Jakarta Bay as well as off Jakarta Bay was studied for metazoan parasites. Based on 70 fish and considering previous studies (230 fish), an environmental indicator system was desi...

Non-target screening analyses were conducted in order to identify a wide range of organic contaminants in sediment and animal tissue samples from Jakarta Bay. High concentrations of di-iso-propylnaphthalenes (DIPNs), linear alkylbenzenes (LABs) and polycyclic aromatic hydrocarbons (PAHs) were detected in all samples, whereas phenylmethoxynaphthalen...

SUMMARY This study provides the first comprehensive information on the parasite fauna of the white-streaked grouper Epinephelus ongus . A total of 35 specimens from the archipelago Karimunjawa, Java Sea, Indonesia were studied for metazoan parasites. For comparison, the documented parasite community of 521 E. areolatus , E. coioides and E. fuscogut...

A number of parasitic diseases have gained importance as neozoan opportunistic infections in the marine environment. Here, we report on the gastrointestinal endoparasite fauna of three baleen whale species and one toothed whale: blue (Balaenoptera musculus), fin (Balaenoptera physalus), and sei whales (Balaenoptera borealis) and sperm whales (Physe...

Baleen and sperm whales, belonging to the Order Cetartiodactyla, are the largest and heaviest existent mammals in the world, collectively known as large whales. Large whales have been subjected to a variety of conservation means, which could be better monitored and managed if physiological and pathophysiological information, such as pathogen infect...

The present study represents the first molecular-chemical screening by pyrolysis-field ionization mass spectrometry applied on fish parasites. A total of 71 fishes from Balinese fish markets, 36 Auxis rochei (Risso, 1810) and 35 A. thazard (Lacepède, 1800), were studied for their acanthocephalan parasites. This is the first record of Rhadinorhynchu...

The objective of this study was to assess the environmental conditions of a heavily polluted marine habitat using descriptors of fish parasites. Epinephelus coioides from Jakarta Bay as well as off Jakarta Bay was studied for metazoan parasites. Based on 70 fish and considering previous studies (230 fish), an environmental indicator system was desi...

In general, the knowledge on parasites infecting Antarctic birds is scarce. The present study intends to extend the knowledge on gastrointestinal parasites of Emperor Penguins (Aptenodytes forsteri) at the Atka Bay, Antarctica. Fecal samples of 50 individual Emperor Penguins were collected at the Atka Bay and analyzed using the sodium-acetate-forma...

The present study represents the first report on the gastrointestinal parasite fauna infecting the free-living and alive Indo-Pacific bottlenose dolphins (Tursiops aduncus) inhabiting waters of the Red Sea at Hurghada, Egypt. A total of 94 individual faecal samples of the examined bottlenose dolphins were collected during several diving expeditions...

A total of 195 Epinephelus coioides (Hamilton, 1822) were studied for fish parasites from Javanese (Segara Anakan lagoon) and Balinese waters. Up to 25 different parasite species belonging to the following taxa: one Ciliata, one Microsporea, five Digenea, one Monogenea, four Cestoda, four Nematoda, one Acanthocephala, one Hirudinea and seven Crusta...

Sixty Epinephelus areolatus were examined for metazoan fish parasites in Indonesia, off Segara Anakan lagoon, Java and in Balinese waters. The study revealed 21 different parasite species, and 14 new host and locality records. The anisakid nematodes Anisakis typica and, for the first time in Indonesia, Anisakis sp. HC-2005 were identified by using...

The metazoan parasite fauna and feeding ecology of 165 Sprattus sprattus (L., 1758) was studied from different geographic regions (Baltic Sea, North Sea, English Channel, Bay of Biscay, Mediterranean Sea). A total of 13 metazoan parasite species were identified including six Digenea, one Monogenea, two Cestoda, two Nematoda and two Crustacea. Didym...

Fish parasites are used to monitor long-term change in finfish grouper mariculture in Indonesia. A total of 210 Epinephelus fuscoguttatus were sampled in six consecutive years between 2003/04 and 2008/09 and examined for parasites. The fish were obtained from floating net cages of a commercially run mariculture facility that opened in 2001. The fau...

In the present study a total of 325 groupers belonging to the species Epinephelus coioides (195), E. areolatus (60) and E. fuscoguttatus (70) from Indonesian coastal marine ecosystems in the Segara Anakan Lagoon (Central Java), Balinese waters and the Thousand Islands were investigated for parasites in 2008 and 2009. A total of 33 different parasit...

A total of 167 red mullets (Mullus surmuletus) from four geographical locations (North Sea, Ligurian Sea, Tyrrhenian Sea, Adriatic Sea) were studied for metazoan parasites and food composition. Fourteen different parasite species were found and six new host records for red mullets could be established. The parasite richness among the different area...

Species of the genus Hysterothylacium are among the most common marine nematode fish parasites in the northern Atlantic. Due to recent findings of cryptic speciation in other parasitic ascaridoid nematodes, a similar pattern of sibling species was hypothesized also for Hysterothylacium aduncum. By investigating a 886- to 890-bp-long genomic DNA fra...