Browsing by Author "Gerhardinger, Leopoldo C."
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- Empty Mussel Shells on Mariculture Ropes as Potential Nest Places for the Blenny Hypleurochilus Fissicornis (Perciformes: Blenniidae)Publication . Gerhardinger, Leopoldo C.; Hostim-Silva, Maurício; Barreiros, João P.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.
- A following association between juvenile Epinephelus marginatus (Serranidae) and Myrichthys ocellatus (Ophichthidae)Publication . Gerhardinger, Leopoldo C.; Samagaia, Rafael; Hostim-Silva, Maurício; Barreiros, João P.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.
- Peixes de Costão Rochoso de Santa Catarina. I. ArvoredoPublication . Hostim-Silva, Maurício; Bertoncini, Áthila A.; Machado, Leonardo F.; Gerhardinger, Leopoldo C.; Daros, Felippe A.; Barreiros, João P.; Godoy, EduardoEste 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.