Leonardo Cruz da Rosa - Academia.edu (original) (raw)

Papers by Leonardo Cruz da Rosa

Boletim do Laboratório de Hidrobiologia

O presente estudo teve como objetivo testar a influência do tipo de isca (peixe ou vísceras de fr... more O presente estudo teve como objetivo testar a influência do tipo de isca (peixe ou vísceras de frango), do período do dia (diurno ou noturno), do período (enchente ou vazante) e do tipo de maré (sizígia ou quadratura) sobre a captura de crustáceos braquiuros no estuário do Rio Sergipe. Entre os fatores analisados, somente o tipo de maré apresentou um efeito significativo com maiores taxas de capturas durante as marés de sizígia. Poluição luminosa e interações com espécies exóticas invasoras também parecem influenciar a composição e abundância dos organismos capturados. No entanto, a influência desses fatores necessita ser melhor avaliada.

Bledius depressus sp. nov. (Figs. 6, 12– 15) Type material.... more Bledius depressus sp. nov. (Figs. 6, 12– 15) Type material. Holotype, male, from DZUP, labeled as ' BRA, Sergipe, Mosqueiro/ 11 º08'00'' S, 37 º08' 45 '' O / Coleta: corer 10cm diâmetro/ 08/IV/ 2013 / L. C. Rosa, col.' [White label, printed]. Three paratypes, two males, one from DZUP and one from FMNH, and one female from DZUP, labeled as ' BRAZIL, RN, Nísia Floresta/ 06º03' S 35 º05' W / 29 -IX- 2010 / L. S. Souto, col.' [White label, printed]. Description. BL: 2.3–2.8 mm BW: 0.5–0.58 mm. Male. Body dark brown to black, with the apex of antennae, maxillary and labial palps, and legs light brown. Elytra entirely brown to black. Body subcylindrical and covered with fine microsetae. Dorsum of head, pronotum and elytra with sculpturing. Antennae with antennomeres 3–6 with the same width and 7–11 slightly increasing in width, antennomere 6 the shortest. Clypeus with anterior margin slightly sinuate. Epistomal suture arcuate. Labrum transverse, anterior margin slightly sinuate. Cuticular process of internal fringe of epipharyngeal lobes with apex not serrated. Mandibles tridentate. Mentum subquadrate. Submentum extending onto venter of head, posterior margin strongly V-shaped. Gular sutures fused posteriorly. Pronotum convex, wider than long (PW/PL: 1.72), anterior pronotal angles produced, posterior margin curved. Prototergosternal suture present, procoxal fissure open, protrochantin exposed. Elytra as long as wide (EL/BW: 1), elytral epipleural ridge present and complete. Sternite VII with median lobe on posterior margin. Tergite VIII with a broad emargination on both sides near the anterior angle and posterior margin truncate. Posterior margin of sternite VIII slightly emarginated. Tergite IX with ventral struts. Tergite X with a dorsal depression on its posterior three-fourths (Fig. 12, arrow), and posterior margin with a long membranous projection (Fig. 13, arrow). Aedeagus with apex of the median lobe curved in lateral view and an evident pair of sclerites on the bulb base (Fig. 14, arrow). [...]

Figure 6. Scatterplot of the linear discriminant analysis of morphometry and shape indices of the... more Figure 6. Scatterplot of the linear discriminant analysis of morphometry and shape indices of the sagitta otolith of Polydactylus virginicus, Menticirrhus cuiaranensis and Conodon nobilis.

FIGURES 1–6. Habitus. 1, Bledius bonariensis; 2, B. fernandezi; 3, B. borzonei, sp. nov.; 4, B. e... more FIGURES 1–6. Habitus. 1, Bledius bonariensis; 2, B. fernandezi; 3, B. borzonei, sp. nov.; 4, B. externus; 5, B. hermani; 6, B. depressus, sp. nov..

RESUMO Foram testados dois tamanhos de covos de garrafas pet e quatro tipos de atrativos (fígado ... more RESUMO Foram testados dois tamanhos de covos de garrafas pet e quatro tipos de atrativos (fígado de boi, quirera, ração canina e massinha para lambari). As diferenças observadas entre as médias de comprimentos dos exemplares capturados nos covos grandes e pequenos não foram significativas. Quanto aos engodos, foram constatadas preferências de P. pandaliformis (camarão) à quirera, A. brasiliensis (peixe-rei) à ração e S. testudineus (baiacu) e C. danae (siri

Nesse trabalho foram identificados os pontos de venda e as espécies comercializadas como iscas vi... more Nesse trabalho foram identificados os pontos de venda e as espécies comercializadas como iscas vivas para a pesca recreativa no litoral do Paraná, sul do Brasil. Foram registrados cinco pontos de venda e seis espécies, sendo dois peixes (Poecilia vivipara e Dormitator maculatus) e quatro crustáceos (Macrobrachium acanthurus, M. olfersii, Callichirus major e Litopenaeus schmitii). Entre elas, somente C. major e L. schmitii foram previamente avaliados quanto a seus usos como iscas vivas. Por outro lado, uma das espécies explotadas, D. maculatus, encontra-se na Lista Vermelha de Espécies Ameaçadas do estado do Paraná. Recursos explorados no comércio de iscas vivas na costa litorânea do Paraná, sul do Brasil In this study, points of sale and the species commercialized as live bait for recreational fishery on the Paraná coastal shore, southern Brazil, were identified. Five points of sale and six species, of which two were fish (Poecilia vivipara and Dormitator maculatus) and four were cr...

Revista de biología tropical, 2014

The sea star Astropecten marginatus has a neotropical distribution and is a highly abundant and f... more The sea star Astropecten marginatus has a neotropical distribution and is a highly abundant and frequent species in shrimp trawling by-catchin many places along the Brazilian coast. This has caused its threat to extinction and in addition, its bio-ecological aspects are poorly known. Thus, the main objective of this study was to analyze the seasonal variations of population length structure and feeding habits of the sea stars A. marginatus inhabiting off state of Paraná, Southern Brazil. The analyzed specimens were collected in February (summer), April (fall), June (winter) and October (spring) of 2008 from shrimp by-catch trawling. In the laboratory, each individual had its length measured and then weighed on an analytical scale. Afterwards, the stomach contents of 10 individuals of each of two most frequent length classes were seasonally analyzed. The relative frequency and abundance for each prey category was determined and, then combined into an index of alimentary importance. A...

Braz Arch Biol Technol, 2005

This study aimed to evaluate the effects of the burrowing crab Chasmagnathus granulata on meiofau... more This study aimed to evaluate the effects of the burrowing crab Chasmagnathus granulata on meiofauna at three intertidal habitats across a tidal exposure gradient (i.e., an emerged salt marsh, an emerged mudflat and a submerged mudflat) in an estuarine embayment of Patos Lagoon, Southern Brazil. Meiofauna community was dominated by nematodes and ostracods, following by copepods and turbellarians. Densities of all studied organisms varied significantly among habitats. Highest values were observed in submerged mudflat while lower in salt marsh. Nematodes were unaffected by crab in either habitat, whereas ostracod, copepod and turbellarian densities were significantly lower in disturbed than control areas in both mudflat habitats. Any meiofaunal group was affected in salt marsh, probably due to a less intense disturbance. The results showed that the burrowing crab C. granulata could play an important role on meiofauna community structure in estuarine intertidal habitats of Patos Lagoon, because crab disturbance seemed to affect mainly surface populations, especially in mudflat. However, the meiofauna response to crab disturbance was variable among habitats depending of the intensity and the frequency of the disturbance.

Figure 2. Length and height of sagittae otoliths for: (A) Polydactylus virginicus; (B) Menticirrh... more Figure 2. Length and height of sagittae otoliths for: (A) Polydactylus virginicus; (B) Menticirrhus cuiaranensis; and (C) Conodon nobilis.

Boletim Do Instituto De Pesca, 2015

In this study both population and reproductive aspects of the Palaemon pandaliformis caught with ... more In this study both population and reproductive aspects of the Palaemon pandaliformis caught with trap in a subtropical salt marsh were analyzed. Monthly samplings were carried out from July 2008 through August 2009. Higher abundances were registered along warmer months (October to January) and were negatively related to water salinity. This population was dominated by females, which were larger and heavier than males. Ovigerous females were caught from September through March, with higher incidence in December. Fecundity ranged from 27 to 393 eggs (mean: 217 ± 74 eggs female-1) and has better correlation with weight than female length. The observed characteristics for P. pandaliformis inhabiting this saltmarsh such as seasonal patterns in both abundance and reproductive period are consistent with those expected by subtropical and temperate populations. However, the sampling method effects need to be evaluated.

Nauplius, 2021

The goal of this study was to estimate the biometric relationships and sex ratio for the red-spot... more The goal of this study was to estimate the biometric relationships and sex ratio for the red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) from the coast of Sergipe, northeastern Brazil. A total of 132 specimens of F. brasiliensis were collected and analyzed (65 females and 67 males) from May 2015 to May 2016. The overall sex ratio did not differ significantly from 1:1. Female size ranged from 20.73-46.43 mm of carapace length (CL), whereas male size ranged from 20.75-32.47 mm CL. Females were larger (34.78±6.05 mm CL, 152.61±19.68 mm of total length (TL)) and heavier (27.45±11.12 g of wet weight (WW)) than males (27.07±2.56 mm CL,

Thalassas: an International Journal of Marine Sciences, 2006

Stratified samples were seasonally collected to analyze the vertical distribution of the macroinf... more Stratified samples were seasonally collected to analyze the vertical distribution of the macroinfauna and sedimentological characteristics in a soft bottom estuarine habitat of the Patos Lagoon, southern Brazil. Physical-chemical characteristics of the sediments were quite similar among all ...

ABSTRACT. This study examines the spatial distribution of the ghost crabs, Ocypode quadrata Fabri... more ABSTRACT. This study examines the spatial distribution of the ghost crabs, Ocypode quadrata Fabricius, 1787, inthirteen estuarine sandy beaches located along two main axes of the Paranagua Bay Estuarine Complex, south-ern Brazil. Burrow densities of ghost crabs were measured at three beach levels established around the high tidemark during the summer and winter of 2005. All beaches showed a steep beach face slope (2.6 to 8.3°) withsediment composition varying from well sorted fine sand to very poorly sorted coarse sand towards the upperestuary. Water salinity ranged from around 31 at those beaches near the bay inlet, to 14 at beaches in the innerestuary. The burrow densities of O. quadrata in the estuarine beaches were similar to those observed in theoceanic beaches. However, the absence of burrows at the four innermost beaches suggests that low salinity andsediment penetrability may prevent ghost crabs from occurring in this region of the estuary. Burrow densitiesshowed strong seas...

The objective of this study was to describe the morphology and morphometry of saggitta otoliths o... more The objective of this study was to describe the morphology and morphometry of saggitta otoliths of Polydactylus virginicus, Menticirrhus cuiaranensis and Conodon nobilis in a tropical environment. Fishes were caught with rod and reel in competitive fishing events promoted in 2014-2015 along the coast of Sergipe. A total of 174 pairs of sagitta otoliths of P. virginicus, 181 of M. cuiaranensis and 77 of C. nobilis was extracted. In general, the sagitta otoliths of all three species analyzed here presented different morphology and shape indices. The permutational multivariate analysis of variance (PERMANOVA) demonstrated significant differences among species and ontogenetic phases within each species using morphometry and shape indices. The linear discriminant analysis (LDA) presented a 98.3% correct reclassification of the otoliths by species.

Acta Ichthyologica et Piscatoria, 2018

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos, 2015

Available from SciELO Books http://books.scielo.org. All the contents of this work, except wher... more Available from SciELO Books <http://books.scielo.org>. All the contents of this work, except where otherwise noted, is licensed under a Creative Commons Attribution-Non Commercial-ShareAlike 3.0 Unported. Todo o conteúdo deste trabalho, exceto quando houver ressalva, é publicado sob a licença Creative Commons Atribuição-Uso Não Comercial-Partilha nos Mesmos Termos 3.0 Não adaptada. Todo el contenido de esta obra, excepto donde se indique lo contrario, está bajo licencia de la licencia Creative Commons Reconocimento-NoComercial-CompartirIgual 3.0 Unported.

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos, 2015

Nauplius, 2020

Shrimp trawling is an important socioeconomic activity but catches a large number of non-target s... more Shrimp trawling is an important socioeconomic activity but catches a large number of non-target species, including Hepatus pudibundus. This study aimed at assessing the population structure of H. pudibundus, analyzing its sex ratio, length distribution, size at first morphological maturity and biometric relationships, and identifying latitudinal patterns. Four samples of 6 kg (shrimps plus by-catch) were monthly collected in March/2015-May/2016 in Pirambu, Sergipe. Carapace width (CW) and length (LC), and total weight (TW, g) were measured. Sex and stage of morphological maturity were defined. A total of 240 individuals was collected from all samples and the sex ratio did not differ from 1:1. This was observed in low latitudes, but females dominated in higher latitudes. The carapace width was 20.8-60.1 mm for females and 19.1-60.8 mm CW for males. Larger sizes were observed in higher latitudes. The estimated carapace widthlength relationships for females and males were not significantly different (CL=0.6764+0.7390•CW; sex grouped). The estimated weight-length

Journal of the Marine Biological Association of the United Kingdom, 2017

The aim of this study was to analyse the population dynamics of Xiphopenaeus kroyeri in Sergipe, ... more The aim of this study was to analyse the population dynamics of Xiphopenaeus kroyeri in Sergipe, Brazil. Four samples were collected monthly from shrimp trawlers based in the municipality of Pirambu from March 2015 to May 2016. Carapace length (CL), total length (TC), live weight (LW), sex and maturity stages were obtained for each specimen. A total of 13,035 individuals were analysed with an overall sex ratio of 1:1. However, this ratio favoured females in larger sizes, which reflects a reproductive strategy, as their larger size allows for larger gonads, higher fertility and production of more eggs. An inflexion point was observed in the relationship between total and carapace length, probably related to reproduction, as this occurred after first maturity. A reproduction peak was observed in August–September, which does not correspond to the closed season. The parameters estimated for a seasonally oscillating version of the von Bertalanffy growth function were CL∞ = 33 mm and K = ...

Boletim do Laboratório de Hidrobiologia

Revista de biología tropical, 2014

Braz Arch Biol Technol, 2005

Boletim Do Instituto De Pesca, 2015

Nauplius, 2021

Thalassas: an International Journal of Marine Sciences, 2006

Acta Ichthyologica et Piscatoria, 2018

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos, 2015

Nauplius, 2020

Journal of the Marine Biological Association of the United Kingdom, 2017