Animal Science and Zoology, Ecology, Evolution, Behavior and Systematics, Aquatic Science
41
Scopus Publications
279
Scholar Citations
10
Scholar h-index
10
Scholar i10-index
Scopus Publications
Freshwater colonization drives divergent reproductive strategies in shrimps of the genus Palaemon (Decapoda: Palaemonidae) Caio S. Nogueira, Sara C. Gasparotto, Matheus Sene, Lucas Oliveira-Rogeri, Isabela R. R. Moraes, Laura S. López Greco, Fernando J. Zara, Lucas R. P. Paschoal Science of Nature, 2026 Freshwater colonization is associated with profound shifts in the reproductive traits of invertebrates, and these phenomena are still rarely investigated in an integrated framework across closely related species. In this study, we examined three species of shrimps of the genus Palaemon, each occupying distinct habitat types, to identify how the transition to freshwater habitats shapes reproductive investment strategies. For each species, we quantified multiple reproductive traits, including fecundity, spermatozoa count, embryo and spermatozoa dimensions, reproductive output, per-offspring investment, and investment in weaponry. Our results revealed parallel patterns between sexes: P. northropi, the marine species, exhibited the highest fecundity and spermatozoa production, whereas P. yuna, the freshwater species, displayed the lowest values for both traits. Embryo and gamete sizes varied coordinately, with P. yuna producing larger embryos and spermatozoa, consistent with the abbreviated larval development typical of freshwater species. Per-offspring investment in P. yuna was up to approximately 16 times higher than in the other species, reflecting the substantial energetic costs associated with this developmental strategy. Overall, we show that freshwater colonization imposes adaptive selective pressures that reshape multiple components of reproduction in an integrated way, affecting not only females but also males. These findings demonstrate that coordinated adjustments in the number, size, and energetic cost of gametes represent key evolutionary responses underpinning reproductive success in freshwater environments.
Morphological Adaptations for Shell Anchoring in Calcinus tibicen: Insights From µCT Imaging, Histology and Scanning Electron Microscopy Alexandre R. da Silva, Carolina Siqueira Safra Terra Melo, Giselle Pinto de Faria Lopes, Caio S. Nogueira Journal of Morphology, 2026 Hermit crabs rely on external shells for protection due to their non‐calcified pleons. This study focuses on the anatomical features and functional roles of various appendages in Calcinus tibicen to understand their mechanisms for shell anchoring. Using scanning electron microscopy (SEM), histological analyses and micro‐computed tomography (µCT), we examined the morphology and internal structure of the fourth and fifth pereopods, telson, and uropods. SEM revealed that the pereopods are equipped with scale setae and teeth, which facilitate a firm grip on the shell's internal surface. µCT imaging showed that the uropods play a critical role in gripping the shell, with the left uropod exhibiting more developed musculature. Histological analysis showed that the muscles of the tailfan are striated and also revealed the presence of connective, hemolymphatic and, epithelial tissues. These findings enhance our understanding of the morphological adaptations that facilitate shell use in hermit crabs, emphasizing the importance of both external and internal structures in maintaining grip and stability. This study fills gaps in the literature regarding the role of the tailfan and pereopods in hermit crab shell anchoring, suggesting that uropods function as hooks, and the fourth and fifth pairs of pereopods act as supporting structures.
Reproductive parameters of the snapping shrimp Alpheus carlae (Caridea: Alpheidae) in an anthropized area of the southeastern coast of Brazil Larissa Carneiro Limeira, Rogério Caetano Costa, Caio Santos Nogueira, Nádia de Moraes Sanches, Régis Augusto Pescinelli Marine Biology Research, 2026 This study investigated aspects of the reproductive biology of Alpheus carlae Anker, 2012 by evaluating fecundity, reproductive output, and embryo volume in females from a highly disturbed environment. Sampling was carried out in two periods: June, August, and November 2021, and bimonthly from March 2024 to January 2025, in a mangrove remnant at Araçá Bay, São Sebastião, São Paulo, Brazil. The mean fecundity of females with embryos at the initial development stage (I) was 801 ± 593 (mean ± SD), ranging from 10 to 1,890 embryos, and it showed a positive correlation with female body size. The mean reproductive output was 7 ± 5.41%. Embryo volume differed significantly among the development stages I, II, and III, showing increases of 23%, 48%, and 82%, respectively. These findings indicate that, despite inhabiting an anthropized habitat, females of A. carlae can maintain a high reproductive potential, which may be associated with the elevated levels of organic compounds derived from sewage contamination. Moreover, these results improve our understanding of how environmental conditions influence the reproductive strategies of caridean shrimps and provide valuable comparative insights for future studies in both anthropized and preserved ecosystems.
Sexual dimorphism and evidence of female ecophenotypes in the Western river prawn Macrobrachium occidentale (Decapoda: Palaemonidae) from Southeastern Mexico César C. Julián-Caballero, Caio Santos Nogueira, Andrés Ramírez-Ponce, Rodolfo De Los Santos-Romero, Marcelo U. García-Guerrero Journal of Natural History, 2026 Morphological variations in prawns of the of the same species within the genus Macrobrachium are related to sex and habitat. However, morphometric studies on such prawns are scarce, even though these crustaceans inhabit habitats with different features. Specimens of Macrobrachium occidentale, which inhabits rivers at different altitudes and with different substrate types, were examined. The purpose was to test for sexual dimorphism and the possible occurrence of female ecophenotypes. Geometric morphometrics was applied to assess whether males have larger carapaces, second abdominal pleuron, and propodus than females, and whether females showed ecophenotypic variation across rivers from three different sub-basins along the Pacific coast of Oaxaca: the Manialtepec, Colotepec and Tonameca rivers. Sexual dimorphism in both size and shape was confirmed. Males had significantly larger carapace and propodus centroid sizes than females, and those body parts differed in shape between sexes. Females had a longer and wider rostrum, while their propodus was longer and narrower than in males. The presence of female ecophenotypes in M. occidentale was evident. Females showed variation in centroid size among sub-basins, with specimens from the Colotepec River displaying the largest configurations. Females from higher altitudes had a longer and thicker rostrum, whereas those sampled closer to the ocean had a slenderer rostrum and narrower carapaces. These trends suggest pronounced morphological plasticity, probably caused by different sex-specific requirements and exposure to different environmental factors such as altitude and substrate type. The present findings help to delimit the morphological range of this species and indicate that diagnostic traits in M. occidentale are probably influenced by habitat features. Further studies are needed to confirm the presence of male morphotypes in M. occidentale.
Life-history traits of the Amazonian freshwater shrimps Euryrhynchus amazoniensis and E. burchelli (Decapoda: Caridea: Euryrhynchidae) Caio Santos Nogueira, Elmo Pereira da Silva, Luis Felipe Vilas Boas Souza, Eduardo Dagnolo Rizato, Lucas Rezende Penido Paschoal, Fernando José Zara Journal of Natural History, 2026 The family Euryrhynchidae comprises freshwater shrimps with a disjunct distribution, occurring mainly in the Amazon basin. Basic biological information for this group, which is comparatively recent in evolutionary terms, is still lacking. The present study provides the first morphometric and biological data for Euryrhynchus amazoniensis and E. burchelli, analysing relative growth, sexual dimorphism and patterns of heterochely and handedness in both sexes. Specimens were collected from floodplain areas of two rivers in Manaus, northern Brazil. Individuals were measured for carapace length and for the articles of the chelipeds. In both species, males were larger than females and exhibited proportionally more developed chelipeds. No significant handedness pattern was observed, indicating that the larger cheliped may occur on either side of the body. In E. amazoniensis, relative growth analyses revealed strong sexual dimorphism, with males allocating more energy to cheliped development. Furthermore, the morphological analyses and evidence indicate the presence of different male morphotypes in this species, a pattern commonly reported for other freshwater carideans, but previously unrecorded for Euryrhynchidae. Overall, the results indicate that E. amazoniensis and E. burchelli share morphological patterns typical of other freshwater shrimps but also exhibit evolutionary particularities reflecting unique reproductive and ecological strategies, thereby expanding current knowledge of the biology of Euryrhynchidae.
When claws tell stories: sexual dimorphism and mating systems in Amazonian palaemonid shrimps (Decapoda: Caridea) Caio Santos Nogueira, Elmo Pereira da Silva, Luis Felipe Vilas Boas Souza, Eduardo Dagnolo Rizato, Fernando José Zara, Lucas Rezende Penido Paschoal Studies on Neotropical Fauna and Environment, 2026 Palaemonid shrimps represent one of the most diverse groups of decapods, inhabiting marine, estuarine, and freshwater environments, and exhibiting a wide variety of reproductive strategies. The present study provides the first comprehensive analysis of sexual dimorphism and cheliped morphology in four Amazonian freshwater shrimp species, Macrobrachium chryseus, M. inpa, M. nattereri, and Palaemon yuna. A total of 568 specimens were collected from different sites in northern Brazil, and morphometric analyses were performed based on carapace length, second pleonal pleuron width, and cheliped articles. The results revealed distinct patterns of sexual dimorphism among species, reflecting differences in mating systems. In M. chryseus and P. yuna, females were larger than males, consistent with the pure search mating system. In contrast, M. inpa exhibited larger males with conspicuous chelipeds, characteristic of the neighborhoods of dominance mating system. Additionally, M. inpa and M. nattereri showed heterochely without a defined handedness pattern, supporting the occurrence of functional reversal as an adaptive mechanism. This study expands the understanding of reproductive strategies in Neotropical palaemonids, highlighting their morphological diversity and ecological adaptations.
The Presence of Ejaculatory Bulbs in Vasa Deferentia: A Well-Preserved Trait Among Alpheoid Shrimps (Crustacea, Caridea, Alpheoidea) Lucas Rezende Penido Paschoal, Caio Santos Nogueira, Fernando José Zara Life, 2025 The superfamily Alpheoidea comprises eight families: Alpheidae, Barbouriidae, Bythocarididae, Hippolytidae, Lysmatidae, Merguiidae, Ogyrididae and Thoridae. Alpheoids are characterized by possessing two pairs of chelate pereopods, a multiarticulate carpus on pereopod 2, and a narrow strip as the last article on maxilliped 2. However, during the inspection of the reproductive system (RS) of several alpheoids, we consistently observed the presence of ejaculatory bulbs (EBs) in vasa deferentia (VDs) of these shrimps. To investigate whether the presence of EBs in the RS is a conserved trait among Alpheoidea representatives, we analyzed as many species as possible along the Brazilian coast: Alpheidae—5 genera, 19 spp., Hippolytidae—2 genera, 2 spp., Lysmatidae—2 genera, 10 spp., Merguiidae—1 genus, 1 sp., Ogyrididae—1 genus, 2 spp., and Thoridae—1 genus, 1 sp. In addition, we examined representatives of the superfamilies Atyoidea (1 family, 2 genera, 2 spp.), Nematocarcinoidea (1 family, 1 genus, 2 spp.), Palaemonoidea (2 families, 4 genera, 4 spp.) and Processoidea (1 family, 2 genera, 2 spp.) to determine whether EB are present in these groups. Among the groups analyzed, except for the family Alpheidae, most species of alpheoids exhibit an expansion on the ventral portion of the VD in continuity with the lumen of the vas deferens, i.e., the EB. This structure increases the surface area of the VD, consequently increasing the quantity of the seminal material to be ejaculated onto the female. We did not observe the presence of EB in any other of the analyzed superfamilies, suggesting that this structure is exclusive in Alpheoidea. In conclusion, the presence of EB in VD appears to be an exclusive trait in Alpheoidea, being considered a well-preserved synapomorphic trait in this group, except in the family Alpheidae that do not harbor EB, representing a plesiomorphic condition within this superfamily.
Life-history traits of the Amazonian freshwater shrimps Euryrhynchus amazoniensis and E. burchelli (Decapoda: Caridea: Euryrhynchidae) CS Nogueira, EP da Silva, LFVB Souza, ED Rizato, LRP Paschoal, ... Journal of Natural History 60 (17-20), 973-989 , 2026 2026
Sexual dimorphism and evidence of female ecophenotypes in the Western river prawn Macrobrachium occidentale (Decapoda: Palaemonidae) from Southeastern … CC Julián-Caballero, CS Nogueira, A Ramírez-Ponce, ... Journal of Natural History 60 (13-16), 791-808 , 2026 2026
Freshwater colonization drives divergent reproductive strategies in shrimps of the genus Palaemon (Decapoda: Palaemonidae) CS Nogueira, SC Gasparotto, M Sene, L Oliveira-Rogeri, IRR Moraes, ... The Science of Nature 113 (2), 41 , 2026 2026
When claws tell stories: sexual dimorphism and mating systems in Amazonian palaemonid shrimps (Decapoda: Caridea) CS Nogueira, EP Silva, LFVB Souza, ED Rizato, FJ Zara, LRP Paschoal Studies on Neotropical Fauna and Environment, 1-13 , 2026 2026 Citations: 1
Reproductive parameters of the snapping shrimp Alpheus carlae (Caridea: Alpheidae) in an anthropized area of the southeastern coast of Brazil LC Limeira, RC Costa, CS Nogueira, NM Sanches, RA Pescinelli Marine Biology Research, 1-12 , 2026 2026
Morphological Adaptations for Shell Anchoring in Calcinus tibicen : Insights From µCT Imaging, Histology and Scanning Electron Microscopy AR da Silva, CSST Melo, GPF Lopes, CS Nogueira Journal of Morphology 287 (1), e70112 , 2026 2026
Weaponry Investment in the Socially Monogamous Snapping Shrimp Alpheus brasileiro (Decapoda: Alpheidae) L Moreira, CS Nogueira, RA Pescinelli, RC Costa Acta Zoologica , 2025 2025
Male reproductive system in Aegla (Decapoda: Aeglidae) and its anatomic-histological and ultrastructural relationship with other anomuran crabs B Paiva, CS Nogueira, GM Teixeira, FJ Zara Cell and Tissue Research 401 (3), 319-340 , 2025 2025 Citations: 1
Crushing and Cutting: Shape Variation and Morphological Integration Between the Claws of Two Swimming Crab Species (Brachyura: Portunidae) J Tadiotto, AR da Silva, JF Perroca, RC Costa, CS Nogueira Acta Zoologica , 2025 2025
The Presence of Ejaculatory Bulbs in Vasa Deferentia: A Well-Preserved Trait Among Alpheoid Shrimps (Crustacea, Caridea, Alpheoidea) LRP Paschoal, CS Nogueira, FJ Zara Life 15 (6), 940 , 2025 2025
First Record of Pleurocrypta petrolisthis Markham, 1988 (Isopoda, Bopyridae) Parasitizing a Porcelain Crab (Porcellanidae) from Brazil, with Notes on Morphology … AP Horch, CS Nogueira, RC Santos, R Guéron, K Pasinatto, RC Costa, ... Acta Parasitologica 70 (3), 92 , 2025 2025 Citations: 2
Comparative spermatozoal ultrastructure in the crab clade Heterotremata (Decapoda: Brachyura): Evidence from a selection of species Q Andreotti, CS Nogueira, LM Pardo, FJ Zara Arthropod Structure & Development 86, 101423 , 2025 2025 Citations: 2
Exploring New Territories: New Records and Occurrence Confirmation of Two Caridean Shrimps in Brazil LRP Paschoal, CS Nogueira, FJ Zara Arthropoda 3 (1), 5 , 2025 2025 Citations: 1
Male reproductive systems of Macrobrachium pantanalense Dos Santos, Hayd & Anger, 2013 and M. amazonicum (Heller, 1862) (Decapoda: Caridea … CS Nogueira, FJ Zara, RC Costa Journal of Crustacean Biology 45 (1), ruaf003 , 2025 2025 Citations: 2
Natural feeding of the freshwater crab Dilocarcinus pagei Stimpson, 1861 (Decapoda: Trichodactylidae) in the floodplain of the Araguari River, southeastern Brazil ACG Barboza, CS Nogueira, AAP Bueno, GB Jacobucci Animal Biology 75 (2), 171-192 , 2025 2025
Variation in larval traits between closely related species of freshwater prawns ( Macrobrachium amazonicum and M. pantanalense ) CS Nogueira, RC Costa, JAF Pantaleão Acta Zoologica 105 (4), 524-538 , 2024 2024 Citations: 6
Natural diet of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) in the Rio Grande, southeastern Brazil BRF da Cruz, CS Nogueira, AAP Bueno, GB Jacobucci Studies on Neotropical Fauna and Environment 59 (3), 931-940 , 2024 2024 Citations: 6
Morphometric reduction in Australocoelia palmata associated with the Devonian marine transgression VR Ribeiro, CS Nogueira, D Sedorko, FN Sousa, SAF da Silva Caminha, ... Journal of South American Earth Sciences 141, 104947 , 2024 2024 Citations: 2
Relative growth, sexual dimorphism, and sexual maturity of the freshwater shrimp Macrobrachium jelskii (Miers, 1877) (Caridea: Palaemonidae) SC Gasparotto, CS Nogueira, RC Costa Invertebrate Reproduction & Development 68 (3), 150-159 , 2024 2024 Citations: 5
Advancing into the morphology of female differentiation in the seabob shrimps Xiphopenaeus dincao and X. kroyeri: Insights into the taxonomy LF Miazaki, NFC França, CS Nogueira, FL Mantelatto, RC Costa Regional Studies in Marine Science 73, 103443 , 2024 2024 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Male morphotypes of the freshwater prawn Macrobrachium brasiliense (Decapoda: Caridea: Palaemonidae) CS Nogueira, JAF Pantaleão, AC Almeida, RC Costa Invertebrate Biology 139 (1), e12279 , 2020 2020 Citations: 26
Relative growth of freshwater prawn Macrobrachium brasiliense (Decapoda, Palaemonidae) and its implications for reproduction CS Nogueira, MS Oliveira, GB Jacobucci, AC Almeida Iheringia. Série Zoologia 109, e2019005 , 2019 2019 Citations: 23
Elucidating taxonomic problems of two closely related freshwater prawn lineages of the genus Macrobrachium (Caridea: Palaemonidae): A geometric morphometrics approach CS Nogueira, NF Camargo, JAF Pantaleão, RC Costa Zoologischer Anzeiger 304, 73-83 , 2023 2023 Citations: 20
Relative growth and population dynamics of Macrobrachium iheringi (Decapoda, Palaemonidae) CS Nogueira, JF Perroca, EL Piantkoski, RC Costa, FG Taddei, ... Papéis Avulsos de Zoologia 59, e20195908 , 2019 2019 Citations: 19
Different strategies and shapes: the relationship between mating system and sexual dimorphism in two freshwater prawn species CS Nogueira, GVMR Gois, RA Pescinelli, RC Costa New Zealand Journal of Zoology 50 (2), 329-340 , 2023 2023 Citations: 15
Hybridisation experiments between freshwater prawns Macrobrachium amazonicum and M. pantanalense (Decapoda: Palaemonidae), and the effects of geographical isolation CS Nogueira, JAF Pantaleão, RC Costa Marine and Freshwater Research 72 (4), 520-525 , 2020 2020 Citations: 15
Fighting does not influence the morphological integration of crustacean claws (Decapoda: Aeglidae) CS Nogueira, AR da Silva, AV Palaoro Biological Journal of the Linnean Society 136 (1), 173-186 , 2022 2022 Citations: 14
From color to shape: ontogenetic shifts in traits of the freshwater crab Dilocarcinus pagei (Brachyura: Trichodactylidae) AR da Silva, CS Nogueira Canadian Journal of Zoology 101 (8), 658-671 , 2023 2023 Citations: 11
Weapon shape variation of male morphotypes in two freshwater prawn species genus Macrobrachium (Decapoda: Palaemonidae) CS Nogueira, JAF Pantaleão, RC Costa Animal Biology 72 (4), 289-308 , 2022 2022 Citations: 10
Population dynamics of a hololimnetic population of the freshwater prawn Macrobrachium amazonicum (Heller, 1862)(Decapoda, Palaemonidae) in southeastern Brazil JF Perroca, CS Nogueira, A Carvalho-Batista, RC Costa Aquatic Ecology 56 (1), 21-34 , 2022 2022 Citations: 10
New Insights into the Male Morphotypes of the Amphidromous Shrimp Macrobrachium olfersii (Weigmann, 1836)(Caridea: Palaemonidae) and a Discussion on Social Dominance Hierarchies RC Santos, CS Nogueira, MS Jaconis, TM Davanso, RC Costa, GL Hirose Zoological Studies 61 (2022) , 2022 2022 Citations: 9
Reproductive traits of the freshwater prawn Macrobrachium amazonicum (Decapoda: Palaemonidae) in an isolated water reservoir CS Nogueira, JF Perroca, A Carvalho-Batista, RC Costa Revista Mexicana de Biodiversidad 91, 913387 , 2020 2020 Citations: 8
Filling gaps in the biology of the endemic and threatened freshwater shrimp Macrobrachium candango (Caridea: Palaemonidae) through basic morphometric and … CS Nogueira, EC Mossolin, MCLB Ribeiro, FL Mantelatto Nauplius 30, e2022004 , 2022 2022 Citations: 7
Heteroquely, laterality, maturity body size and shape variation of males and females of the endemic South American anomuran Aegla quilombola Moraes, Tavares … AR da Silva, LGM Lemes, CS Nogueira, PC Bispo, AL Castilho Invertebrate Reproduction & Development 65 (1), 12-23 , 2021 2021 Citations: 7
Variation in larval traits between closely related species of freshwater prawns ( Macrobrachium amazonicum and M. pantanalense ) CS Nogueira, RC Costa, JAF Pantaleão Acta Zoologica 105 (4), 524-538 , 2024 2024 Citations: 6
Natural diet of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) in the Rio Grande, southeastern Brazil BRF da Cruz, CS Nogueira, AAP Bueno, GB Jacobucci Studies on Neotropical Fauna and Environment 59 (3), 931-940 , 2024 2024 Citations: 6
Shelter preference and variation in the daily activity pattern of the ornamental shrimp Neocaridina davidi (Caridea: Atyidae) A Carvalho-Batista, CS Nogueira, RC Costa, JAF Pantaleão Nauplius 31, e2023018 , 2023 2023 Citations: 6
Morphometry of the freshwater prawn Macrobrachium brasiliense (Caridea: Palaemonidae) and its relationship with reproductive strategy CS Nogueira, AC Almeida Caldasia 45 (1) , 2023 2023 Citations: 6
Relative growth, sexual dimorphism, and sexual maturity of the freshwater shrimp Macrobrachium jelskii (Miers, 1877) (Caridea: Palaemonidae) SC Gasparotto, CS Nogueira, RC Costa Invertebrate Reproduction & Development 68 (3), 150-159 , 2024 2024 Citations: 5
Relative growth and morphological sexual maturity of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda: Aethridae) in southeast Brazil MS Jaconis, CS Nogueira, G Vieira Martins Rezende-Gois, JF Perroca, ... Invertebrate Reproduction & Development 67 (1-2), 1-12 , 2023 2023 Citations: 5