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| Conti, Stéphane; Roux, Philippe; Fauvel, Christian; Maurer, Benjamin; Demer, David. |
| A challenge for the aquaculture community has long been the development of harmless techniques for monitoring fish in a tank. Acoustic telemetry has been used to monitor fish swimming behavior, and passive acoustics have been used to monitor fish feeding, but new techniques are needed to monitor non-invasively their numbers and growth rates. Recently, it has been demonstrated that the acoustical total scattering cross section of fish swimming in a tank can be measured from multiple reverberation time series. These measurements have been used successfully to estimate the number of fish in a tank in laboratory conditions, and to characterize their acoustical signatures. Here, we introduce a novel method for acoustically monitoring fish numerical density and... |
| Tipo: Text |
Palavras-chave: Total scattering cross section; Fish counting; Growth rate; Remote monitoring; Fish behavior. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1121.pdf |
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| Ilarri,Martina Di Iulio; Souza,Allan Tainá de; Medeiros,Paulo Roberto de; Grempel,Renato Grotta; Rosa,Ierecê Maria de Lucena. |
| The effects of tourist visitation and food provisioning on fish assemblages were assessed by visual censuses (stationary technique) carried out in a tropical reef in Northeastern Brazil. Comparisons of species abundance, richness, equitability, and trophic structure in the presence (PT) and absence (AT) of tourists suggest that tourist visitation and supplementary food influenced the structure of the fish assemblage, as follows: (a) diversity, equitability and species richness were significantly higher on the AT period, while the abundance of a particular species was significantly higher during PT; (b) trophic structure differed between the AT and PT periods, omnivores being more abundant during the latter period, while mobile invertivores, piscivores,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish behavior; Tourism; Human impact; Northeastern Brazil; Abudefduf saxatilis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400014 |
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| Goetze, Jordan S.; Januchowski-hartley, Fraser A.; Claudet, Joachim; Langlois, Tim J.; Wilson, Shaun K.; Jupiter, Stacy D.. |
| Identifying the most sensitive indicators to changes in fishing pressure is important for accurately detecting impacts. Biomass is thought to be more sensitive than abundance and length, while the wariness of fishes is emerging as a new metric. Periodically harvested closures (PHCs) that involve the opening and closing of an area to fishing are the most common form of fisheries management in the western Pacific. The opening of PHCs to fishing provides a unique opportunity to compare the sensitivity of metrics, such as abundance, length, biomass and wariness, to changes in fishing pressure. Diver-operated stereo video (stereo-DOV) provides data on fish behavior (using a proxy for wariness, minimum approach distance) simultaneous to abundance and length... |
| Tipo: Text |
Palavras-chave: Artisanal fisheries; Catch efficiency; Compliance; Conservation; Customary management; Fish behavior; Fisheries management; Flight initiation distance. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00610/72247/71050.pdf |
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| Silvano,Renato A. M.; Begossi,Alpina. |
| We analyzed fishermen's local ecological knowledge (LEK) about the feeding habits, trophic interactions, habitats, fishing grounds, migration, and reproduction of nine coastal fishes in Búzios Island, southeastern Brazilian coast. We interviewed 39 fishermen using standardized questionnaires. Fishermen's LEK on habitat use and trophic interactions for the studied fishes agreed with the scientific literature, allowing the organization of reef and pelagic food webs. The interviewed fishermen mentioned that submerged rock formations would be important habitats for some large commercial fishes, such as Seriola spp., Caranx latus and Epinephelus marginatus. In some instances there was no scientific data to be compared with fishermen's LEK, and thus this kind of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethnobiology; Fish behavior; Fish ecology; Human ecology; Small-scale fisheries. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100013 |
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