Ecological constraints and life history strategies of palaemonid prawns in Amazonia

Collart, Olga Odinetz; Magalhães, Célio

doi:10.1080/03680770.1992.11900670

Cited by 23 publications

(13 citation statements)

References 10 publications

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“…This nutritional stress selects for an enhanced maternal energy investment into egg production, allowing a partially food-independent early larval development (Anger 2001(Anger , 2006. In M. amazonicum, the functional morphology of larval mouth parts (Odinetz Collart & Magalhães 1994), as well as behavioural observations (Araujo & Valenti 2007), suggest that Zoea I is most probably a non-feeding stage. However, it has remained unclear whether the first uptake of food occurs in the second or not until the third zoeal stage.…”

Section: Introductionmentioning

confidence: 99%

From lecithotrophy to planktotrophy: ontogeny of larval feeding in the Amazon River prawn Macrobrachium amazonicum

Anger¹,

Hayd²

2009

Aquat. Biol.

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During downstream transport from rivers to estuaries, early larval stages of the Amazon River prawn Macrobrachium amazonicum (Heller 1862) are likely exposed to planktonic food limitation. In the laboratory, we studied the effects of presence or absence of food on larval survival, moulting and biomass (dry mass, and content of carbon, hydrogen and nitrogen). Unfed larvae developed successfully from hatching of the Zoea I (Z I) to the third zoeal stage (Z III). Complete absence of starvation effects indicated obligatory lecithotrophy in Z I, while significantly delayed moulting and reduced biomass in unfed Z II proved that this stage is facultatively lecithotrophic. Although unfed Z III did not develop any further (obligatory planktotrophy), they still showed a high endotrophic potential, surviving for up to another 10 d (in total 2 wk from hatching), and utilizing about two-thirds of their initial biomass. Dramatically decreasing C:N ratios in unfed larvae suggest an almost complete metabolic degradation of internal lipid stores (visible as fat droplets in the hepatopancreas region), but little protein mobilization. Larvae obtained from 2 different females differed significantly in biomass at hatching and, correspondingly, also in maximum survival time, delay of moulting to the Z III and average rates of biomass utilization. In conclusion, the early larval stages of M. amazonicum depend very little on food, shifting from completely non-feeding behaviour (Z I) through facultative lecithotrophy (Z II), to planktotrophy (later stages). This ontogenetic pattern may be an adaptation to initial food limitation associated with larval export from limnic to estuarine environments.

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Section: Introductionmentioning

confidence: 99%

From lecithotrophy to planktotrophy: ontogeny of larval feeding in the Amazon River prawn Macrobrachium amazonicum

Anger¹,

Hayd²

2009

Aquat. Biol.

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“…Eggs are released in freshwater and are carried to the estuary where larval stages (Bertini et al, 2014). After completing planktonic larval development juveniles start to migrate upstream and finally reach headwaters where they find more suitable conditions for their benthic feeding habits during adult life (Jalihal et al, 1993;Collart and Magalhães, 1994;Bauer, 2011). Thus, the presence of these amphidromous species in a catchment indicates that the river system maintains its ecological connectivity.…”

Section: Discussionmentioning

confidence: 99%

Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future

2017

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Variations in physical characteristics along the course of a river influence habitat availability which reflects in species distribution. Knowledge of ecology and diversity of lotic species is important for evaluating how river ecosystems will respond to environmental impacts. Freshwater decapods are a group of high ecological and economic importance, but the knowledge about factors influencing their distribution is scarce in Brazil. We performed a survey of decapods to describe their abundance and distribution as well as to study their relationships with stream physical variables and especially their association with different substrates types. We studied 23 sites located in 15 tributaries of Guapiaçú River, RJ, where we collected decapods in different substrates types and measured a set of physical variables. We found five decapods species, including amphidromous and non-amphidromous shrimps and crabs. Decapods were strongly associated with leaf-litter substrates and their abundance was related to a multivariate axis describing longitudinal changes in stream characteristics. We concluded that decapods occurring in the Guapiaçú catchment inhabit mainly small streams with preserved riparian forests where they find shelter and potential prey of invertebrates. The ongoing project to build a dam on the Guapiaçú River will have negative consequences to migrating shrimps and we strongly recommend that mitigating actions, such the construction of structures to allow the passage of migrating fauna, should be taken.Keywords: shrimps, environmental factors, leaf litter, tropical stream, damming. Distribuição e abundância de decápodes de água doce e sua associação com variáveis ambientais em uma bacia hidrográfica de Mata Atlântica que será represada ResumoVariações nas características físicas de um rio ao longo do seu curso influenciam a disponibilidade de habitas e dessa forma a distribuição de espécies. O conhecimento sobre a ecologia e diversidade de espécies lóticas é importante para avaliar como esses ecossistemas responderão a impactos ambientais. Decápodes de água doce são um grupo de grande importância ecológica e econômica, contudo o conhecimento sobre fatores influenciando sua distribuição ainda é escasso no Brasil. Nós realizamos um levantamento de decápodes para descrever sua abundância e distribuição, bem como estudar sua relação com características físicas dos rios, especialmente sua associação com tipos diferentes de substrato. Nós estudamos 23 localidades distribuídas em 15 rios tributários do Rio Guapiaçú, RJ, onde coletamos decápodas em diferentes tipos de substratos e medimos um conjunto de variáveis físicas. Nós encontramos cinco espécies de decápodas incluindo camarões anfídromos e não anfídromos e caranguejos. Esses organismos foram fortemente associados a substratos de folhiço alóctone e sua abundância foi relacionada com um eixo PCA que descreve as mudanças nas características físicas longo do curso do rio. Nós concluímos que os decápodas que ocorrem na bacia do Rio Guapiaçú habitam princi...

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“…Odinetz Collart & Magalhães 1994, de Araujo & Valenti 2007). However, larvae from the Amazon estuary kept at the same temperature (29°C) in continued absence of food can survive almost twice as long as the Pantanal larvae (up to 14 to 15 versus 8 to 9 d), and in some hatches they can even reach the Z IV stage (K. Anger & L. Hayd unpubl.…”

Section: Discussionmentioning

confidence: 99%

“…Although pure freshwater is not an optimal rearing condition, it does allow successful development of Pantanal larvae through metamorphosis, while larvae from the Amazon estuary can survive only through a few early stages (Guest & Durocher 1979, Remetin 2008, Knott 2009). Unlike the larvae of estuarine populations, but similar to those from the Pantanal, larvae produced in central Amazonia must tolerate fresh water, developing in lentic and highly productive shallow inland waters (Magalhães & Walker 1988, Odinetz Collart 1991, Moreira & Odinetz Collart 1993, Odinetz Collart & Magalhães 1994. In spite of continued gene flow among the various northern populations, there is thus also some divergence between coastal and Amazonian inland populations, which should receive further attention in comparative biological and genetic studies.…”

Section: Discussionmentioning

confidence: 99%

Feeding and growth in early larval shrimp Macrobrachium amazonicum from the Pantanal, southwestern Brazil

Anger

Hayd²

2010

Aquat. Biol.

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The palaemonid shrimp Macrobrachium amazonicum (Heller 1862) lives in coastal rivers and estuaries along the northern coasts of South America as well as in inland waters of the Amazon, Orinoco, and upper La Plata (Paraguay-Paraná) River systems. In an experimental investigation on a little known, hydrologically isolated population from the Pantanal (upper Paraguay basin), we studied ontogenetic changes in early larval feeding and growth. Similar to a previously studied population from the Amazon estuary, the first zoeal stage (Z I) hatched with conspicuous fat reserves remaining from the egg yolk. While Z I is a non-feeding stage, Z II is facultatively lecithotrophic, and Z III is planktotrophic, requiring food for further development. Compared to estuarine larvae, those from the Pantanal hatched with lesser amounts of lipid droplets, and they survived for significantly shorter periods in the absence of food (maximally 8-9 d versus 14-15 d, at 29°C). Both populations moulted in short intervals (ca. 2 d) through larval stages Z I to VI. Biomass increased exponentially, with a higher growth rate observed in the Pantanal larvae. These develop in lentic inland waters, where high productivity allows for fast growth of planktonic predators. By contrast, the early larval stages of the Amazon population show a higher endotrophic potential and are thus better adapted to conditions of food limitation occurring during riverine downstream transport through lotic waters, towards coastal marine habitats. Initial larval independence from food in the Pantanal clade is interpreted as a plesiomorphic trait persisting from coastal marine ancestors. KEY WORDS: Caridean shrimp · Larval feeding · Larval growth · Lecithotrophy · StarvationResale or republication not permitted without written consent of the publisher Aquat Biol 9: [251][252][253][254][255][256][257][258][259][260][261] 2010 guay and Paraná River basins (La Plata system), are hydrologically separated and thus genetically completely isolated from all others.The occurrence of Macrobrachium amazonicum in the La Plata system has occasionally been considered to be the result of a recent anthropogenic introduction (Bialetzki et al. 1997, citing a technical report by Torloni et al. 1993). In a recent review, Maciel & Valenti (2009) also cited Magalhães et al. (2005) in this context. However, this reference is based on a misunderstanding of a statement, where Magalhães and coauthors are actually saying (p. 1933) that M. amazonicum was probably introduced into water reservoirs and rivers of the northeastern and eastern states of Brazil (citing Ramos-Porto & Coelho 1998), while the populations in the La Plata basin are explicitly referred to as belonging to the 'native fauna ' (cf. Holthuis 1952). This is in fact strongly corroborated by much earlier records from northern Paraguay (dating back to A. Borelli's expedition in 1893-94, published by Nobili 1896) and from the Pantanal of Mato Grosso, southwestern Brazil (Moreira 1912(Moreira , 1913.Due to hydrological frag...

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Ecological constraints and life history strategies of palaemonid prawns in Amazonia

Cited by 23 publications

References 10 publications

From lecithotrophy to planktotrophy: ontogeny of larval feeding in the Amazon River prawn Macrobrachium amazonicum

From lecithotrophy to planktotrophy: ontogeny of larval feeding in the Amazon River prawn Macrobrachium amazonicum

Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future

Feeding and growth in early larval shrimp Macrobrachium amazonicum from the Pantanal, southwestern Brazil

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