Andreas Kunzmann

Andreas Kunzmann
Leibniz Centre for Tropical Marine Research (ZMT) | ZMT · Department of Ecology

PhD

About

156
Publications
49,310
Reads
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1,744
Citations
Additional affiliations
August 1998 - present
Leibniz Centre for Tropical Marine Research (ZMT)
Position
  • Head of Working Group Ecophysiology
September 1988 - August 1992
Christian-Albrechts-Universität zu Kiel
Position
  • PhD Student and Junior Scientist

Publications

Publications (156)
Article
Full-text available
The green macroalga Caulerpa lentillifera (sea grapes, green caviar) is a promising source for future nutrition due to its beneficial composition for human consumption. It is cultured in tidal ponds, mainly in Vietnam and the Philippines, and stored for shipment and retail in plastic containers, like polystyrene (PS) and polyethylene terephthalate...
Article
Extreme climatic events affect all living organisms, including fish. This study evaluated growth, hematological, immune-antioxidant, and molecular stress responses to understand the acclimatization ability of European seabass, Dicentrarchus labrax fed on four different dietary supplements with subsequent exposure to an extreme ambient warm (32 oC)...
Article
Cultivating high-value deposit feeders such as sea cucumbers on solid waste from intensive aquaculture is an innovative approach to turn potential nutrient pollution into a resource. Carbon supplementation to increase the carbon to nitrogen ratio (C:N) of the nitrogen-rich aquaculture waste has been demonstrated to support higher deposit feeder bio...
Chapter
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...
Poster
In the early stages after larval settlement, coral spat can be rapidly overgrown and outcompeted by algae, reducing overall survival for coral reef replenishment and supply for restoration programs. Here we investigated three antifouling (AF) coatings for their ability to inhibit algal fouling on coral settlement plugs, a commonly-used restoration...
Article
The potential impact of cage farming activities on nutrient enrichment of the coastal waters of Nha Trang Bay, Vietnam was investigated within a project financed by the Vietnamese Academy of Sciences (VAST). Results show a very high level of nitrogen (N) in the studied area: the average content of dissolved inorganic nitrogen (DIN) was 177.4 ±6.0μg...
Article
Edible sea grapes (Caulerpa lentillifera) are produced in shaded ponds (~ 50 μmol photons m − 2 s − 1) and are of increasing demand for direct human consumption. The controlled exposure to light-stress after harvest could increase algae's content of nutritionally valuable antioxidants, including phenols. In order to define a light-stress tool for f...
Article
Full-text available
The interest in edible sea grapes ( Caulerpa lentillifera ) is increasing due to their potentially beneficial effect on human health. This macroalga, already used for direct and indirect human consumption, is grown in aquacultures in Vietnam and The Philippines. Here, the edible fronds of sea grapes were examined for their antioxidant activity (AOA...
Article
Full-text available
The ‘temperate’ reef coral Coscinaraea marshae Wells, 1962, is reported from Siberut Island (West Sumatra, Indonesia), a near-equatorial locality, 3375 km away from its northernmost range limit in Western Australia, where it is considered a high-latitude endemic. This tropical record suggests that the latitudinal distributions of poorly recorded re...
Article
For the first time oxygen consumption and spontaneous activity of 16 individuals of stonefish Synanceia verrucosa were determined simultaneously. The experiments were conducted in an intermittent-flow respirometer at 25°C, and salinity (PSU 32). Continuous measurements of fish activity and oxygen consumption were combined in order to calculate rout...
Article
Full-text available
The co-occurrence of bacteria in sea grape (green caviar) Caulerpa lentillifera under two health state conditions was studied. The role of potentially detrimental and beneficial bacteria was discussed. A baseline for understanding the C. lentillifera holobiont was presented. Abstract The bacterial communities of Caulerpa lentillifera were studied...
Article
Full-text available
Climate change-induced extreme temperature events are becoming more intense and frequent. For fish, temperature is the master abiotic factor that controls and limits fish development and physiology at all stages of aquaculture. Major physiological constraints at the individual level underpin changes in fish growth, hemato-physiology, metabolism, im...
Conference Paper
Global extreme climatic events impact all living organisms, including fish. This study aimed to evaluate the growth, hemato-physiological, and immune-antioxidant stress responses as indicators for the acclimatization ability of European seabass (Dicentrarchus labrax) fed with four different dietary supplements, with subsequent ambient extreme heatw...
Preprint
Full-text available
The bacterial communities of the sea grape Caulerpa lentillifera were studied during a disease outbreak in Vietnam. The Rhodobacteraceae and Rhodovulum dominated the composition of healthy C. lentillifera . Clear differences between healthy and diseased cases were observed at order, genus and Operational Taxonomic Unit (OTU) level. Bacterial divers...
Article
Full-text available
Tropical coastal ecosystems provide a unique complex marine habitat with a high diversity of algal species, Vietnam being a particular hotspot. These algae may host a variety of potential unknown or underestimated bioactive algal compounds. In parallel the worldwide rising interest in macroalgae-based products lead to increasing activities in seawe...
Conference Paper
Full-text available
Extreme temperature and precipitation indices showed trends consistent with global warming (Knapp et al., 2015; Sun et al., 2016). Due to global climate changes, winter temperatures in some parts of the Mediterranean sometimes plunge to 9.5 to 10.6 °C (Besson et al., 2016; Llorente and Luna, 2013). Shifts in precipitation patterns can alter water t...
Article
Full-text available
Isostichopus badionotus and Isostichopus sp. are two holothuroids exploited in the Caribbean region of Colombia. Until recently, they were considered a single species. During one year, 222 individuals of Isostichopus sp. and 114 of I . badionotus were collected in two bays of the Santa Marta region to study their reproductive biology and collect in...
Article
In nature, a multitude of factors influences the fitness of an organism at a given time, which makes single stressor assessments far from ecologically relevant scenarios. This study focused on the effects of water temperature and predation stress on the metabolism and body mass gain of a common intertidal rock pool fish, Gobius paganellus, addressi...
Article
Despite climate-change challenges, for most aquaculture species, physiological responses to different salinities during ambient extreme cold events remain unknown. Here, European seabass acclimatized at 3, 6, 12, and 30 PSU were subjected to 20 days of an ambient extreme winter cold event (8o C), and monitored for growth and physiological performan...
Conference Paper
Climate change-driven extreme weather events are expected to challenge ectotherms' physiological tolerance. The hemato-physiological modulation potentials of fish during extreme ambient cold events at different salinities are poorly studied. In this study, we evaluated the growth, hemato-physiological, antioxidants, and immunological response of Eu...
Article
Full-text available
Climate change-driven extreme climatic events are expected to challenge ectotherms' physiological tolerance. The hemato-physiological modulation potentials of fish during ambient extreme-cold events at various salinities are poorly studied. In this study, we evaluated the growth, hemato-physiological, antioxidants, and immuno-logical responses of E...
Article
Full-text available
Milkfish, an important aquaculture species in Asian countries, are traditionally cultured in outdoor-based systems. There, they experience potentially stressful fluctuations in environmental conditions, such as temperature, eliciting changes in fish physiology. While the importance of the gut microbiome for the welfare and performance of fish has b...
Article
Full-text available
In 2000 a protected area of 20,000 ha was established in West Sumatra, Indonesia (MPA Pulau Pieh) and the partial reef recovery is well documented. During monitoring of destructed reefs, a new cryptic mushroom coral species, Podabacia kunzmanni, was detected. It is not common, with rather occasional occurrence and most specimens are small. During r...
Article
Full-text available
Closed recirculation aquaculture systems (RAS) in combination with integrated multi-trophic aquaculture (IMTA) are considered best management practices, but high material costs and difficult maintenance still hinder their implementation, especially in developing countries and the tropics. Few case studies of such systems with tropical species exist...
Article
Full-text available
Isostichopus sp. is a variety of Isostichopus badionotus, proposed as a new species, which has been intensely fished in the Colombian Caribbean, arousing interest for its aquaculture. This study evaluated the effect of two culture densities (1–3 larvae ml−1), two temperatures (23°C and 26°C) and two microalgae diets (Isochrysis galbana, Chaetoceros...
Article
Unprecedented shifts in temperature and precipitation patterns in recent decades place multiple abiotic stressors on the fish. In teleosts, metabolic, osmoregulatory, and molecular potential as tolerance responses to extreme ambient heatwave events at different salinities are poorly understood. The study was performed to evaluate the physio-biochem...
Article
Extreme weather events are becoming more intense and frequent as a result of climate change. The modulation of hemato-physiological potential as a compensatory response to extreme warm events combined with different salinities is poorly understood. This study aimed to assess the hemato-physiological and molecular response of European seabass, Dicen...
Article
With the ever increasing demand for food, global aquaculture practices have intensified enormously over the last years. Due to this intensification, (inadequate) management strategies can cause (chronic) stress in cultured fish, hereby affecting fish performance and welfare. In Southeast Asia milkfish (Chanos chanos) is an important aquaculture spe...
Conference Paper
Extreme water temperatures related to global climate change represent a significant challenge in terms of fish welfare and aquaculture productivity. Understanding the effect of more frequent and extended extreme temperature events on physiological responses, growth performance and other production-relevant parameters of major aquaculture species ar...
Article
Extreme water temperatures related to global climate change represent a significant challenge in terms of fish welfare and aquaculture productivity. Understanding the effect of more frequent and extended extreme temperature events on physiological responses, growth performance and other production-relevant parameters of major aquaculture species ar...
Article
Extreme weather events are increasing with global climate change and are of concern to aquaculture and fisheries scientists and producers. Temperature is a key environmental factor determining fish growth and metabolism. Hence, the following study was conducted to investigate the effect of extreme temperature events on the growth and hematological...
Conference Paper
Due to global climate changes, extreme temperature events are a great concern. The study was conducted to understand the extreme warm events on the growth and hematology of European seabass (Dicentrarchus labrax). Fish were exposed to 8oC, 16oC, 24oC, 32oC for 30 days mimicking climate change-induced temperature events. Blood lactate, plasma trigly...
Article
Full-text available
Since the size of newly hatched larval fish is directly related to egg size, small differences in initial egg size can be critical to survival and further development of offspring. Underlying processes causing size variation in fish offspring are still not entirely understood. In this study we investigated whether the spatial position of an individ...
Chapter
Full-text available
Echinoderms are a source of a broad range of secondary metabolites with a large variety of bioactive properties. Although pigment and lipid derivatives are the major groups of bioactive compounds found in crinoids and ophiuroids, saponins represent the most abundant and diverse marine natural products (MNPs) in the phylum Echinodermata. This review...
Article
Full-text available
Detailed knowledge about basic metabolism in the early life stages of fishes helps increase our understanding of energetically important life phases. However, little is known about metabolic capacities during ontogenetic development of anemone fishes before and after settlement. This study established activities of 3 key metabolic enzymes — citrate...
Technical Report
Full-text available
The Leibniz Centre for Tropical Marine Research (ZMT) is Germany-wide the only research institute for the study of tropical and subtropical marine ecosystems and their services to human societies. In 2019, ZMT published the brochure Concepts, Collaborations, Common Grounds – The Impact of Our Work Beyond Research and Academia to illustrate how rese...
Poster
Bacterial roles in host defence mechanisms of sea cucumbers have been studied previously. However to our knowledge, rare, if any has ever been reported on reverse verification studies using environmental pathogenic bacteria of the said organisms. In this study, we tried to select the most active bacterial species using different biological assays....
Article
Full-text available
Decreased oxygen (O2) availability (hypoxia) is common in rock pools and challenges the aerobic metabolism of fishes living in these habitats. In this study, the critical O2 tension (Pcrit), a whole animal measure of the aerobic contribution to hypoxia tolerance, was compared between four New Zealand triplefin fishes including an intertidal special...
Article
The notion that thermal specialists from tropical regions live closer to their temperature limits than temperate eurytherms, seems too generalized. Species specific differences in physiological and biochemical stress reactions are linked to key components of organism fitness, like metabolic capacity, which indicates that acclimation potential acros...
Article
Full-text available
The Aerobic Scope (AS), which reflects the functional capacity for biological fitness, is a highly relevant proxy to determine thermal tolerance in various taxa. Despite the importance of this method, its implementation is often hindered, due to lacking techniques to accurately measure standard-(SMR) and maximal-(MMR) metabolic rates, especially in...
Article
Full-text available
Echinoderm diseases have attracted little interest in contrast to the other commercial marine organisms. This study reports the pathogenesis pattern of juvenile Holothuria scabra. 11 pure bacteria were isolated from lesions of juvenile H. scabra with the symptoms of skin ulceration disease. Phylogenetic identification based on 16S rRNA gene sequenc...
Article
Full-text available
In nature, a multitude of both abiotic and biotic stressors influence organisms with regard to their overall fitness. Stress responses that finally impair normal biological functions may ultimately result in consequences for whole populations. This study focused on the metabolic response of the intertidal rock pool fish Gobius paganellus towards si...
Article
Jellyfish blooms might be driven by the alterations in seawater temperature (SWT) associated with climate change. The physiological responses of jellyfish to changing SWT, however, are poorly understood. Therefore, we asked the question: how do sudden changes (±6 °C) in SWT affect the physiological performance of the jellyfish Cassiopea sp.? We mea...
Article
Full-text available
In shrimp aquaculture, farming systems are carefully managed to avoid rearing failure due to stress, disease, or mass mortality, and to achieve optimum shrimp production. However, little is known about how shrimp farming systems affect biogeochemical parameters and bacterial communities in rearing water, whether high stocking densities (intensive s...
Article
Milkfish (Chanos chanos) is one of the most important aquaculture species in Asian countries. These teleost fish are traditionally cultured in outdoor-based systems and therefore have to cope with daily and/or seasonally changing environmental conditions. Temperature changes beyond the optimal range of a species are known to induce an endocrine str...
Article
Full-text available
The sea cucumber Holothuria scabra has a high commercial value and a great potential to be cultivated. A thorough feeding strategy is needed to overcome juvenile rearing technique constraints. Stable isotope analysis can be used for determining diet sources of sea cucumbers that play a role as deposit feeders. This study aims to determine suitable...
Article
Full-text available
Aim: To investigate the dietary preferences of sea cucumber Holothuria scabra fed with algal food sources like Sargassum, Fucus, Spirulina, Ulva in combination with marine pellet under laboratory condition. Carbon stable isotope technique (δ13C) was used to better understand the assimilation of different dietary food sources. Study Design: A micr...
Article
Full-text available
Given predicted increases in urbanization in tropical and subtropical regions, understanding the processes shaping urban coral reefs may be essential for anticipating future conservation challenges. We used a case study approach to identify unifying patterns of urban coral reefs and clarify the effects of urbanization on hard coral assemblages. Dat...
Conference Paper
The global intensification of commercial aquaculture production has become an increasing threat for the performance and growth of cultured fish. Besides suboptimal management strategies, such as high stocking densities, fish have to cope with changing environmental conditions, as commonly encountered in outdoor systems. In a previous experimental s...
Article
Marine resources play an important role for the economy of Indonesia and the country is among the major aquaculture producers worldwide. This article presents the applicable conclusions of a study conducted in three communities in Sekotong, Lombok, which practice semi-intensive methods of pond-based aquaculture in a coastal mangrove estuary. The In...
Article
Full-text available
Coastal development, growing urbanization and industrialization are the most important stressors of coral reefs worldwide. Jakarta is one of the largest megacities worldwide. The coral reefs of the Thousand Islands north of Jakarta have degraded dramatically over the last 30-40 years. While large-scale gradients (i.e., regional drivers) have been e...
Article
The growing demand for stony corals as ornamental aquarium animals requires defined aquacultural breeding strategies. For the sexual propagation of corals, material substrates are needed, that attract larvae and support their settlement and development. In this study, five types of highly porous ceramic materials were developed following the exampl...
Article
Full-text available
The demand for sandfish, Holothuria scabra has rapidly grown in the last decades. In order to better understand the quality of this species as human food, nutritional profiles of farmed and wild juvenile sandfish were investigated in this study by measuring the proximate body compositions of carbohydrates, proteins and lipids, including the amino a...
Chapter
Full-text available
Die Nachfrage nach Fisch und anderen Meeresfrüchten steigt weltweit. Während der Fischfang stagniert, hat die wirtschaftliche Bedeutung der Aquakultur, besonders in Südostasien, in den letzten Jahren stark zugenommen. Sie stellt weltweit den am schnellsten wachsenden Sektor der Nahrungsmittelherstellung dar. Sie ergänzt zunehmend den Fischfang als...
Article
Full-text available
The clownfish-anemone association exemplifies a symbiosis where both members benefit from nutrient exchange and protection from predators. Clownfish also perform aeration-like behaviour in their host anemones at night, but it is not yet known whether this is stimulated by the onset of hypoxia, and whether both members benefit from O2 replenishment....
Article
Pelagic jellyfish blooms are increasing worldwide as a potential response to climate-change. However, virtually nothing is known about physiological responses of jellyfish to e.g. sudden changes in water temperature due to extreme weather events. When confronted with a sudden decrease or increase in water temperature by 6 °C, medusae of Cassiopea s...
Article
Full-text available
Populations on small islands surrounded by coral reefs often heavily depend on the services provided by these reefs. The health and recovery of reefs are strongly influenced by recruitment of coral larvae. Their settlement relies on cues such as those emitted from bacterial communities forming biofilms on reef surfaces. Environmental conditions can...