Ecology, Evolution, Behavior and Systematics, Aquatic Science
4
Scopus Publications
21
Scholar Citations
3
Scholar h-index
Scopus Publications
The Second Antenna of Caridean Shrimps: An Approach on the Variation of Flagellar Setae among Species with Different Mating Systems Caio Santos Nogueira, Rafael Carvalho Santos, Milena Silva Jaconis, Régis Augusto Pescinelli Biological Bulletin, 2024 The setae on the antennae of caridean shrimps perform chemoreceptive functions, including the identification of potential mating partners. Variation in the number of setae on the antennal flagellum has been reported as a sexually dimorphic trait in these organisms. This difference is correlated with the distinct mating systems and reproductive behaviors of these animals. This study investigates the variation in the number of antennal flagellar setae in four species of shrimps from the genus Macrobrachium, which are grouped into two distinct mating systems. Two species with a pure search mating system (M. jelskii and M. pantanalense) and two with a neighborhoods of dominance mating system (M. acanthurus and M. olfersii) were analyzed. The setae were quantified using light microscopy, morphologically characterized through scanning electron microscopy, and then compared among the demographic groups of each species. The results show that in the pure search species, males possess a significantly higher number of setae than females (P < 0.01). In the neighborhoods of dominance species, dominant males of M. acanthurus and M. olfersii had more setae than subordinate males and females (P < 0.01). The same types of setae, denticulate and simple, were found in all species. We conclude that the variation in the number of flagellar setae is correlated with the mating system of each species and their specific reproductive behaviors, suggesting a morphological adaptation to optimize chemoreception in different reproductive events. These findings contribute to the understanding of reproductive strategies and sensory adaptations in crustaceans.
Relative growth and morphological sexual maturity of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda: Aethridae) in southeast Brazil Milena Silva Jaconis, Caio Santos Nogueira, Gabriel Vieira Martins Rezende-Gois, Julia Fernandes Perroca, Rogerio Caetano Costa Invertebrate Reproduction and Development, 2023 The crab Hepatus pudibundus is a bycatch of the shrimp fishing industry, and despite having no commercial value, it is impacted by fishing activities. In this way, research about relative growth and sexual maturity can help to understand the life cycle of fisheries-affected species. Thus, the present study aimed to estimate morphological sexual maturity (MSM) and analyse the relative growth of a population of H. pudibundus. For morphometric analysis and MSM estimate, the following structures were measured: the carapace (CW) and abdomen width (AW), the left and right cheliped propodus length (LPL and RPL) and height (LPH and RPH) for both sexes, and the gonopodium length (GL) for males. No heterochely was observed for both sexes, but the propodus dimensions showed sexual dimorphism. Males attain MSM at 44.71 mm CW and females at 41.87 mm CW. Males and females showed higher growth rates in GL and AW, respectively, in the juvenile stage, suggesting a greater investment in the development of secondary sexual characteristics before MSM. The present study provides information on the growth pattern of the species, which is significant to the community structure of fishing areas and serves as a parameter for evaluating protective measures that have been implemented.
New Insights into the Male Morphotypes of the Amphidromous Shrimp Macrobrachium olfersii (Weigmann, 1836) (Caridea: Palaemonidae) and a Discussion on Social Dominance Hierarchies R. C. Santos, C. S. Nogueira, Milena Silva Jaconis, T. M. Davanso, R. C. Costa, G. L. Hirose Zoological Studies, 2022 Male morphotypes in a population may lead to the development of social dominance hierarchies in crustacean species. Currently, Macrobrachium is the decapod crustacean genus with the largest record of species that present the development of hierarchies. Macrobrachium olfersii has morphological characteristics that indicate the presence of male social dominance within its populations. Thus, the present study tested the hypothesis of the occurrence of male morphotypes in M. olfersii through morphometric and morphological analysis of the chelipeds. Sampling was carried out from March 2018 to October 2021 in seven points along the Jequitinhonha River, Northeast Brazil. A total of 264 males were collected with carapace length (CL) ranging from 4.01 to 23.70 mm. Morphological sexual maturity size was estimated at 8.95 mm CL. The morphometric and morphological analysis confirmed the presence of three adult male morphotypes: M1, M2, and M3. The characterization of the different morphotypes was mainly due to the variation in size, shape, and morphology of the largest cheliped of the second pair of pereopods. Most morphometric relationships differed significantly (p < 0.01) among the three morphotypes, mainly between M3 against M1 and M2. The variation in the propodus shape was also evident. This trait and the angulation of the spines differed significantly between morphotypes (p < 0.01), with the propodus of morphotype M3 being more robust and carrying a greater number of spines than the others. The occurrence of social dominance and the exaggerated development of a cheliped (weapon) can be advantageous for dominant individuals when they need to compete for resources. This morphological trait can provide these individuals with advantages during fights and guarantee access to the best resources, whether they are shelter, food, or sexual partners. Our results add new information to the biology of M. olfersii, as well as the genus Macrobrachium, and the occurrence of social dominance in species of this group. In addition, by describing these morphotypes in detail, using a set of complementary morphological and morphometric techniques, it is possible to access the differential morphology along the M. olfersii males, as well as confirm a life history trait found in several Macrobrachium species.
RECENT SCHOLAR PUBLICATIONS
The Second Antenna of Caridean Shrimps: An Approach on the Variation of Flagellar Setae among Species with Different Mating Systems CS Nogueira, RC Santos, MS Jaconis, RA Pescinelli The Biological Bulletin 246 (2-3), 87-97 , 2024 2024 Citations: 1
Elucidating the ecological patterns of sympatric sea-bob shrimp species Xiphopenaeus dincao and X. kroyeri: A temporal and spatial approach MS Jaconis, A Carvalho-Batista, JF Perroca, RC Costa Regional Studies in Marine Science 69, 103349 , 2024 2024 Citations: 6
Primeiros traços da história de vida de Xiphopenaeus dincao Carvalho-Batista, Terossi, Zara, Mantelatto, Costa, 2020 e X. kroyeri (Heller, 1862) após a identificação do … MS Jaconis Universidade Estadual Paulista (Unesp) , 2023 2023
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
Elucidating the ecological patterns of sympatric sea-bob shrimp species Xiphopenaeus dincao and X. kroyeri: A temporal and spatial approach MS Jaconis, A Carvalho-Batista, JF Perroca, RC Costa REGIONAL STUDIES IN MARINE SCIENCE 69, 14 , 2023 2023
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, e83 , 2022 2022 Citations: 9
New insights into the male morphotypes of the RC Santos, CS Nogueira, MS Jaconis, TM Davanso, RC Costa, G Hirose 2022
Pesca sustentável:: a importância da pesquisa científica MS Jaconis, RC da Costa Aprendendo Ciência (ISSN 2237-8766) 10 (1), 14-20 , 2021 2021
MOST CITED SCHOLAR PUBLICATIONS
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, e83 , 2022 2022 Citations: 9
Elucidating the ecological patterns of sympatric sea-bob shrimp species Xiphopenaeus dincao and X. kroyeri: A temporal and spatial approach MS Jaconis, A Carvalho-Batista, JF Perroca, RC Costa Regional Studies in Marine Science 69, 103349 , 2024 2024 Citations: 6
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
The Second Antenna of Caridean Shrimps: An Approach on the Variation of Flagellar Setae among Species with Different Mating Systems CS Nogueira, RC Santos, MS Jaconis, RA Pescinelli The Biological Bulletin 246 (2-3), 87-97 , 2024 2024 Citations: 1
Primeiros traços da história de vida de Xiphopenaeus dincao Carvalho-Batista, Terossi, Zara, Mantelatto, Costa, 2020 e X. kroyeri (Heller, 1862) após a identificação do … MS Jaconis Universidade Estadual Paulista (Unesp) , 2023 2023
Elucidating the ecological patterns of sympatric sea-bob shrimp species Xiphopenaeus dincao and X. kroyeri: A temporal and spatial approach MS Jaconis, A Carvalho-Batista, JF Perroca, RC Costa REGIONAL STUDIES IN MARINE SCIENCE 69, 14 , 2023 2023
New insights into the male morphotypes of the RC Santos, CS Nogueira, MS Jaconis, TM Davanso, RC Costa, G Hirose 2022
Pesca sustentável:: a importância da pesquisa científica MS Jaconis, RC da Costa Aprendendo Ciência (ISSN 2237-8766) 10 (1), 14-20 , 2021 2021
