A following association between juvenile Epinephelus marginatus (Serranidae) and Myrichthys ocellatus (Ophichthidae)

Copyright © 2006 Société Française d’Ichtyologie.Une association entre un mérou noir juvénile Epinephelus marginatus (Serranidae) et Myrichthys ocellatus (Ophichthidae). Les informations sur le comportement des poissons marins du Brésil sont très réduites. Nous présentons dans ce travail la première observation d’une interaction dans laquelle un mérou noir Epinephelus marginatus (Lowe, 1834) agit comme suiveur d’un Myrichthys ocellatus (Lesueur, 1825). Ce comportement a été observé par hasard dans un récif de la Réserve marine biologique de Arvoredo, située sur la côte centrale de l’état de Santa Catarina, Brésil. Bien que l’observation ait été unique, l’interaction entre ces deux espèces nous a semblé apporter un bénéfice pour le mérou suiveur, qui peut ainsi chasser des proies cachées. Nous l’avons vu défendre activement sa place auprès de M. ocellatus, contre l’approche de deux autres jeunes mérous

Habitat use and abundance of goliath grouper Epinephelus itajara in Brazil: a participative survey

Developing survey strategies for threatened species is often limited by access to sufficient individuals to acquire information needed to design appropriate conservation measures. The goliath grouper (Epinephelus itajara) is a large reef fish, globally classified as critically endangered. In Brazil, fishing has been prohibited since 2002. Herein we investigated habitat use and abundance of E. itajara in Brazil drawn from a participative survey, which engaged volunteer divers in data-collection. A total of 188 reports were recorded between 2005 to 2011 throughout 13 Brazilian states. Our results revealed that habitat type influenced the relationship between total length and depth of occurrence of E. itajara. We observed a significant difference between habitats, artificial presented a nonlinear and natural an asymptotic relationship. This study underscores the importance of developing conservation measures addressing specific habitats and locations to enhance population recovery. Artificial structures (shipwrecks and manmade reefs) are critical habitats that must be considered as highly sensitive areas to E. itajara strategic conservation policies. We suggest the creation and implementation of marine protected areas, as key strategies for E. itajara conservation, especially for artificial habitats and aggregation sites124803810O desenvolvimento de estratégias de pesquisa para espécies ameaçadas é frequentemente limitado pelo acesso a indivíduos suficientes para adquirir informações necessárias para elaborar medidas de conservação adequadas. Dentre essas espécies, o mero (Epinephelus itajara) é um peixe recifal de grande tamanho, classificado globalmente como criticamente ameaçado. No Brasil, a pesca é proibida desde 2002. Investigou-se o uso de hábitat e abundância de E. itajara no Brasil através de uma pesquisa participativa, que engajou mergulhadores voluntários na coleta dos dados. Um total de 188 relatos foram registrados entre 2005 a 2011 em 13 estados brasileiros. Os resultados revelaram que o tipo de hábitat influenciou a relação entre o comprimento total e profundidade de ocorrência de E. itajara. Observou-se uma diferença significativa entre hábitats: hábitat artificial apresentou uma relação não linear e hábitat natural uma relação assintótica. Este estudo ressalta a importância do desenvolvimento de medidas de conservação abordando hábitats e locais específicos visando a recuperação populacional. Estruturas artificiais (naufrágios e recifes feitos pelo homem) são hábitats críticos que devem ser considerados como áreas relevantes para as estratégias políticas conservação de E. itajara. Sugere-se a criação e implementação de áreas marinhas protegidas como uma estratégia fundamental para a conservação de E. itajara, especialmente em hábitats artificiais e locais de agregaçãosem informaçã

Peixes de Costão Rochoso de Santa Catarina. I. Arvoredo

Este livro representa um passo importante no sentido de ampliar o conhecimento acerca da ictiofauna marinha do sul do Brasil e de sensibilizar pesquisadores, tomadores de decisão e o público em geral com relação à importância da conservação da Reserva Biológica Marinha do Arvoredo.ABSTRACT: The book is timely, as it provides meaningful support to regional management strategies, where the costal zone is in demonstrable irregular overgrowth. Although not specifically meant for management applications, the check list presented, as well as the photo-drawing guide is of great utility for many ecology/community studies. The book synthesizes a 10-year research effort, and is organized in several topics, which includes an introduction about the ABMR, a synopses on reef fish ecology biological adaptations of reef fish, systematic and rocky-shore habitat occupation. A check list and menaced species are also pointed out, as well as an explanation of how-to-use the guide, glossary and index. A total of 84 species are presented in colour underwater photos, common names are given in Portuguese, Spanish and English, with a detailed description of the most important distinctive features, pointed in schematic drawings of each species; behavior, feeding habits, reaction to divers and distribution are also reported. The book is a strong tool to accurately identifying the most common observed fish species when diving along South Brazil. This guide-book can surely be widely used in Brazil, especially to introduce young scientists and the general public in the rocky-shore fish ecology. Scuba divers will also benefit from this tool, which provides a practical way for further studying and identifying fishes

Empty Mussel Shells on Mariculture Ropes as Potential Nest Places for the Blenny Hypleurochilus Fissicornis (Perciformes: Blenniidae)

PROCEEDINGS OF THE 8th INTERNATIONAL COASTAL SYMPOSIUM (ICS 2004) Itajaí/Itapema, Santa Catarina, Brazil, 14 to 19 March 2004.Copyright © 2006 Coastal Education and Research Foundation (CERF).We report on the use of empty shells from mariculture of Perna perna mussels as nesting places for males of (Blenniidae). Although its habitat preferences remain still unnoticed, this species was found to be surprisingly abundant in mariculture structures. Ten (ready to harvest) mussel ropes were collected in a mariculture near Porto Belo island, Santa Catarina, Brazil. Seven species were found: (n=327; 93.7%; min TL=15.82mm; max TL=66.18mm); and Manual collections rendered 3 additional species: and Nest samples (n=29) were taken from submersed ropes by snorkeling. From these nests, 13 were captured together with its parental fish owner, all of them males of . Parental male size was found to be positively correlated with nest size (NS = 2.45 * MS 63.77; R2= 0.87). The availability of empty shells due to mussel mortality offered good opportunity for males to build its nests. The “novel” habitat provided by mariculture may offer particular situations for males of this species. Since a temporal controlled mortality effect periodically kills part of the population (mariculture harvesting), older/larger males have a higher probability of being excluded of the reproductive active pool, which can potentially benefit young/smaller males. We also advanced with the hypothesis that the high availability of structures favorable to blenny reproduction may be working as a source area of larvae, thus possibly increasing fish recruitment in other adjacent areas

Healing Brazil's Blue Amazon: The Role of Knowledge Networks in Nurturing Cross-Scale Transformations at the Frontlines of Ocean Sustainability

HIGHLIGHTSThe Anthropocene compels unlocking of ocean-related network capabilities.Orchestration of local, regional, and global knowledge networks can augment transformative capacity.Transdisciplinary network diagnostics are promising social learning tools.Strategic advice for transformational research in ocean territories are provided.This paper dedicates to understanding of what is needed to achieve the transformation of ocean governance. Based on the theory of transformative agency conceptualized in a multi-level governance context, we build on recent novel inter- and transdisciplinary research in Brazil to explore the opportunities for transformation in the dynamic, complex, and multi-level field of ocean governance. We focus this analysis on three transformation processes toward developing a socially and ecologically coherent marine protected area network as the core of a marine spatial planning process for enhanced ecosystem-based polycentric governance of the country's Exclusive Economic Zone. The findings illuminate leverage points for achieving (much needed) transformation in Brazilian ocean governance and potentially beyond. These include: connecting transformative actions into coherent narratives and testing strategic advice derived from theories of transformative agency to promote regime shifts in ocean governance systems; setting of more ambitious social mobilization targets; fostering orchestration of knowledge-networks considering multiple issues, territorial and institutional levels; implementing institutional learning experiments; supporting transformational trajectories toward co-evolutionary, polycentric, ecosystem- and area-based ocean governance systems; and pursuing gradual, incremental structural understanding of a given knowledge network field as a major driver of catalyzing transformative change. Hereby, this article advances understanding of how to better navigate the transformation toward enhanced sustainability in an important part of the Atlantic and hence of our global ocean

A following association between juvenile Epinephelus marginatus (Serranidae) and Myrichthys ocellatus (Ophichthidae)

Copyright © 2006 Société Française d’Ichtyologie.Une association entre un mérou noir juvénile Epinephelus marginatus (Serranidae) et Myrichthys ocellatus (Ophichthidae). Les informations sur le comportement des poissons marins du Brésil sont très réduites. Nous présentons dans ce travail la première observation d’une interaction dans laquelle un mérou noir Epinephelus marginatus (Lowe, 1834) agit comme suiveur d’un Myrichthys ocellatus (Lesueur, 1825). Ce comportement a été observé par hasard dans un récif de la Réserve marine biologique de Arvoredo, située sur la côte centrale de l’état de Santa Catarina, Brésil. Bien que l’observation ait été unique, l’interaction entre ces deux espèces nous a semblé apporter un bénéfice pour le mérou suiveur, qui peut ainsi chasser des proies cachées. Nous l’avons vu défendre activement sa place auprès de M. ocellatus, contre l’approche de deux autres jeunes mérous

Habitat use and abundance of goliath grouper Epinephelus itajara in Brazil: a participative survey

Developing survey strategies for threatened species is often limited by access to sufficient individuals to acquire information needed to design appropriate conservation measures. The goliath grouper (Epinephelus itajara) is a large reef fish, globally classified as critically endangered. In Brazil, fishing has been prohibited since 2002. Herein we investigated habitat use and abundance of E. itajara in Brazil drawn from a participative survey, which engaged volunteer divers in data-collection. A total of 188 reports were recorded between 2005 to 2011 throughout 13 Brazilian states. Our results revealed that habitat type influenced the relationship between total length and depth of occurrence of E. itajara. We observed a significant difference between habitats, artificial presented a nonlinear and natural an asymptotic relationship. This study underscores the importance of developing conservation measures addressing specific habitats and locations to enhance population recovery. Artificial structures (shipwrecks and manmade reefs) are critical habitats that must be considered as highly sensitive areas to E. itajara strategic conservation policies. We suggest the creation and implementation of marine protected areas, as key strategies for E. itajaraconservation, especially for artificial habitats and aggregation sites