Temporal and spatial patterns of freshwater decapods associated with aquatic vegetation from floodplain rivers

Torres, María Victoria; Giri, Federico; Collins, Pablo Agustín

doi:10.1007/s10750-018-3704-y

Cited by 9 publications

(9 citation statements)

References 75 publications

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“…Our finding of a strong association with habitat is in keeping with Macrobrachium research around the world. However, while most studies document habitat associations at a within‐site scale, such as boulders (Snyder et al, 2016) or macrophytes (Montoya, 2003; Torres et al, 2018), our study is one of the few to compare mesohabitats, i.e. main channel versus floodplain.…”

Section: Discussionmentioning

confidence: 97%

Modelling the longitudinal distribution, abundance, and habitat use of the giant freshwater shrimp (Macrobrachium spinipes) in a large intermittent, tropical Australian river to inform water resource policy

et al. 2022

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Water development threatens rivers and their biodiversity. Amphidromous shrimp are particularly vulnerable as they require migration between freshwater and estuaries to complete their life cycle. The Fitzroy River is a large tropical intermittent river undergoing water development that is home to the amphidromous shrimp Macrobrachium spinipes (cherabin), yet little is known about its habitat use and flow‐ecology making it difficult to inform sustainable water‐take. We investigated habitat associations, distributional patterns suggestive of amphidromy, and the influence of water availability by sampling main channel and floodplain pools along a 350‐km river length during 2 contrasting flow years. Applying a size‐specific abundance model, we estimated abundance per size class, site, and year. We then predicted abundance at the landscape scale with remotely sensed water to reveal the impact of water availability on the meta‐population. Our model revealed that juveniles were in greatest abundance in downstream main channel pools, whereas adults were in greatest abundance in upstream floodplain pools. Abundance varied by year with lower numbers predicted in the low‐flow year. Longitudinal and habitat patterns remained when our pool‐level results were scaled to the landscape, and the positive relationship of abundance to wet‐season flow was strengthened. The predominance of smaller cherabin in the lower reaches of the river provides indirect support for an estuarine nursery and amphidromous life history; however, small individuals observed in landlocked pools, during late dry season suggests possible within‐river recruitment. The importance of water development policies that protect wet‐season flow and passage along the Fitzroy River is supported by this work. These types of policies are likely to be important for this and other amphidromous shrimp species across Australia, Southeast Asia and further afield. Further research detailing the species life history and describing flow–recruitment relationships will be important contributions to understanding this important taxonomic group and refining policies for current and future water resource development.

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Section: Discussionmentioning

confidence: 97%

Modelling the longitudinal distribution, abundance, and habitat use of the giant freshwater shrimp (Macrobrachium spinipes) in a large intermittent, tropical Australian river to inform water resource policy

et al. 2022

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“…Thus, access to C3 plant resources, the availability of which is ampli ed by access to the trophic options of the ATTZ, is more pronounced in the former species. This coexistence mechanism adds to the complexity already studied by Collins (2000) and Torres et al (2018) in which the spatial arrangement and diversity of plants plays a prominent role. In agreement with the data provided by these authors, the pronounced consumption of C3 plants responds to a greater exploration of the littoral zones by M. borellii and the displacement of P. argentinus towards the center of the lakes.…”

Section: Niche Breadth Overlap and Coexistence Strategies (Hypothesis 3)mentioning

confidence: 74%

“…S1). To characterize the biotic and abiotic conditions of each study site at each moment of the hydrosedimentological cycle, we measured vegetation cover following the methodology described in Torres et al (2018) and chlorophyll a concentration following the APHA protocol (1992). We measured in the eld the temperature, pH, conductivity and dissolved oxygen of the lakes with digital sensors (HANNA 198130 multiparameter), depth with a bathymetric ashlight and transparency with a Secchi disk.…”

Section: Study Sitementioning

confidence: 99%

Trophic dynamics of two omnivorous shrimps in the middle Paraná River

Viozzi

Saigo

Williner

2023

Preprint

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The study of the relative importance of different sources of resources in freshwater food webs is key to understanding ecosystem functioning. The shrimps Macrobrachium borellii and Palaemon argentinus are sympatric species that, given their abundance, are important components in the trophic webs of the Paraná River. This river presents a vast floodplain dominated by C3 plants, which in periods of high water (HW), is available as a trophic resource for aquatic organisms. Both M. borellii and P. argentinus are omnivorous consumers and mobile swimmers, so they may play an important role in the incorporation of these terrestrial resources into the aquatic trophic webs during HW. In the present study, we aimed to estimate the relative contribution of trophic web sources using stable isotope analysis (SIA) of muscle and hepatopancreas and stomach content analysis (SCA). The trophic strategy, niche breadth and niche overlap of both shrimp species throughout the hydrosedimentological cycle were also analyzed. The results indicate that both species can consume C3 plants and that, unlike P. argentinus, M. borellii rapidly exploits the available C3 plants during HW. On the other hand, the niche breadth of M. borellii is generally larger than that of P. argentinus, while the niche overlap between both species is smaller during LW. The results obtained highlight the role of shrimp in aquatic food webs, as they can exploit C3 carbon sources during HW and make it available to other aquatic consumers, thus playing a key role in connecting floodplain primary production and water bodies.

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“…Its natural diet is characterized by vegetal remains, algae and animal items such as oligochaetes and insect larvae [90,56]. Both prawns and crabs form abundant populations associated with the aquatic macrophytes of the floodplain littoral zone [46,89,91].…”

Section: Studied Organismsmentioning

confidence: 99%

“…Trichodactylus borellianus belongs to the neotropical family of freshwater crabs, Trichodactylidae, with broad distribution in South America (from 0° to 35° S) [88]. This crab has a close relationship with the floating aquatic vegetation and exhibits little mobility [48,89]. Its natural diet is characterized by vegetal remains, algae and animal items such as oligochaetes and insect larvae [90,56].…”

Section: Studied Organismsmentioning

confidence: 99%

Consumer-driven nutrient recycling of freshwater decapods: linking ecological theories and application in integrated multi-trophic aquaculture

Musin

Torres

Carvalho

2022

Preprint

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The Metabolic Theory of Ecology (MET) and the Ecological Stoichiometry Theory (EST) are central and complementary in the consumer-driven recycling conceptual basis. The comprehension of physiological processes of organisms at different levels of organizations is essential to explore and predict nutrient recycling behavior in different scenarios, and to design integrated productive systems that efficiently use the nutrient inputs through an adjusted mass balance. We fed with fish-feed three species of decapods from different families and with aquacultural potential to explore the animal-mediated nutrient dynamic and its applicability in productive systems. We tested whether physiological (body mass, body elemental content), ecological (diet), taxonomic and experimental (time of incubation) variables predicts N and P excretion rates and ratios across and within taxa. We also analysed body mass and body elemental content independently as predictors of N and P excretion of decapods across, among and within taxa. Finally, we verified if body content scales allometrically across and within taxa and if differed among taxa. Body mass and taxonomic identity predicted nutrient excretion rates both across and within taxa. When physiological variables were analysed independently, body size best predicted nutrient mineralization in both scales of analyses. Regarding body elemental content, only body P content scaled negatively with body mass across taxa. Results showed higher N-requirements and lower C:N of prawns than anomurans and crabs. The role of crustaceans as nutrient recyclers depends mainly on the species and body mass, and should be considered to select complementary species that efficiently use feed resources. Prawns need more protein in their feed and might be integrated with fish of higher N-requirements, while crabs and anomurans, with fish of lower N-requirements. Our study contributed to the background of MTE and EST through empirical data obtained from decapods and provided useful information to achieve more efficient aquaculture integration systems.

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Temporal and spatial patterns of freshwater decapods associated with aquatic vegetation from floodplain rivers

Cited by 9 publications

References 75 publications

Modelling the longitudinal distribution, abundance, and habitat use of the giant freshwater shrimp (Macrobrachium spinipes) in a large intermittent, tropical Australian river to inform water resource policy

Modelling the longitudinal distribution, abundance, and habitat use of the giant freshwater shrimp (Macrobrachium spinipes) in a large intermittent, tropical Australian river to inform water resource policy

Trophic dynamics of two omnivorous shrimps in the middle Paraná River

Consumer-driven nutrient recycling of freshwater decapods: linking ecological theories and application in integrated multi-trophic aquaculture

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