Effects of surgically implanted dummy transmitters on the South American catfish Jundiá (Rhamdia quelen)

Schulz, Uwe Horst

doi:10.1590/s1519-69842003000200019

Cited by 15 publications

(16 citation statements)

References 7 publications

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“…In previous tests using the tagging method, incisions closed within two weeks and no negative effects were detected for silver catfish (Rhamdia quelen Quoy and Gaimard, 1824) growth (Schulz, 2003) and movements (Schulz and Leuchtenberger, 2006).…”

Section: Discussionmentioning

confidence: 94%

Diel and seasonal movements of grumatã Prochilodus lineatus (Valenciennes 1836) (Characiformes: Prochilodontidae) in the Sinos River, Southern Brazil

2010

Braz. J. Biol.

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Prochilodus lineatus is a reophilic migratory species of economical importance for local fisheries which is widely distributed in Brazil. The present study investigated diel and seasonal movement patterns, spawning migration and habitat use of P. lineatus in the Sinos River, Southern Brazil. Between August 2002 and March 2004, 19 grumatãs were tagged internally with digitally coded radio transmitters. Tracking was conducted weekly by boat or aircraft, and six fixed data loggers recorded movements of tagged fish. Results showed that the mean distance covered per fish and day was positively related with fish weight (p = 0.03; n = 19). Grumatã showed preference for river streches surrounded by wetlands (p < 0.001; n = 286). Their diel activity pattern displayed one peak at 7 hours, and a second at 15 hours. During the night, activity was significantly reduced (p = 0.01). The seasonal movements pattern showed increased activity in No synchronized long distance spawning migrations were observed. The mean distance covered by the individuals/ day showed a negative significant relationship with number of tracking days (p = 0.022; n = 19), indicating a higher probability of being captured for more mobile individuals. The preservation of the still existing wetlands and reduction of the fishing pressure are essential for the future conservation of the grumatã population of the Sinos River.

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Section: Discussionmentioning

confidence: 94%

Diel and seasonal movements of grumatã Prochilodus lineatus (Valenciennes 1836) (Characiformes: Prochilodontidae) in the Sinos River, Southern Brazil

2010

Braz. J. Biol.

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“…Se consideró que el peso del radiotransmisor no debía superar el 2% del peso corporal del pez (Schulz y Leuchtenberger 2006, Schulz 2003, Winter 1996, por tanto, como los peces capturados pesaron entre 40 y 140 g se utilizaron radiotransmisores de la serie de nanotag de Lotek modelo NTC-6-1, de 2,8 g de peso, vida útil de 124 días y sus dimensiones son 22,4 mm de longitud-9,1 de diámetro y NTC-4-2L de 2,1 g de peso, vida útil de 55 días y sus dimensiones son 18,3 mm de longitud-8,3 de diámetro.…”

Section: Materials Y Métodosunclassified

“…En este sentido, existen tratamientos con antibióticos, los cuales son usados previo y durante la cirugía. Uno de éstos es el uso de oxitetraciclina (75 mg/kg del peso del pez) directamente en la incisión (Schulz 2003) o inyectarla directamente en la cavidad celómica, inmediatamente después de haber realizado la cirugía (Daugherty y Sutton 2005). Una vez que las heridas están completamente cicatrizadas y no hay indicios de procesos infecciosos, los peces son liberados en el mismo lugar donde fueron capturados.…”

Section: Implementos De Trabajo Los Implementos De Trabajo Se Divideunclassified

“…La cirugía para implantes de radiotransmisores en peces es nueva en Chile y para llevarla a cabo se han tenido en consideración todas las variables para evitar las infecciones descritas para siluriformes (Daugherty y Sutton 2005, Sakaris y Jesien 2005, Schulz 2003, Schulz y Leuchtenberger 2006. Los procedimientos aquí descritos resultaron exitosos, logrando descartar la mortalidad postoperatoria, y se realizó un efectivo seguimiento de los peces durante el tiempo de vida útil de los radiotransmisores.…”

Section: Implementos De Trabajo Los Implementos De Trabajo Se Divideunclassified

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Implante quirúrgico de radiotransmisores en Diplomystes camposensis (Siluriformes, Diplomystidae)

Solis-Lufí¹,

Jara²,

Colin³

et al. 2009

Arch. med. vet.

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SuMMARySurgically implanted radio transmitters are useful for monitoring fish behaviour, movement patterns and home range. In Chile, there are no reports using this particular technique in native freshwater fish. Therefore, no standardized protocols have been developed in Chile to describe surgical procedures for inserting the implant nor the required dose of anaesthetics and medications applied to avoid fish mortality. This study describes a procedure for implanting a radio transmitter in Diplomystes camposensis, a native fish of southern Chile, which can be valuable for future research. The procedure was successful on these organisms because it prevented post surgical mortality and allowed fish monitoring throughout the entire life span of the transmitter. Our research can serve as a guide for future studies involving surgical implants of radio transmitters on native fish with high conservation values, in which mortality due to research should be minimal.

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“…Nevertheless, a fully implantable system maximizes the likelihood that the studied fish will be treated normally by surrounding fish 5 and minimizes the risk of infection and expulsion. 6 Even the presence of a small, protruding antenna has been shown to cause adverse tissue reaction at the antenna exit 7,8 and to elicit aggressive attacks from other individuals of Atlantic salmon smolts. 5 We are looking to use a fully implantable biotelemetry system 4,9 to study blood flow distribution in Atlantic cod, Gadus morhua L. voluntarily feeding and moving between different habitats.…”

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confidence: 99%

Recovery of gastric evacuation rate in Atlantic codGadus morhuaL surgically implanted with a dummy telemetry device

et al. 2011

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The current study investigated how the gastric evacuation rate (GER) was affected after surgically introducing dummies of a blood flow biotelemetry system into the abdominal cavity of Atlantic cod, Gadus morhua. Gastric evacuation experiments were performed two and 10 days postsurgery on surgically implanted and control G. morhua force-fed sandeel, Ammodytes tobianus. The results were compared with previously obtained estimates from unstressed conspecifics voluntarily feeding on a similar diet. After two days, GER was significantly lower in the group of fish with the dummy implants compared with the control group, but following 10 days of recovery no significant difference was seen between the two groups. The difference between implanted and control fish observed two days postsurgery may have resulted either from surgery, postsurgical stress and/or the presence of the implant. The conclusion is that 10 days of postsurgical recovery will stabilize GER in G. morhua, thus indicating that at this point the implant per se did not affect GER. Both the fish with surgical implants and controls in this study evacuated their stomachs much slower and with much higher interindividual variation compared with G. morhua feeding voluntarily on similar prey items. The lower GER and higher interindividual variation for force-fed fish indicate that handling, anaesthetization and force-feeding impair GER and that individual fish respond differently to the suppressing effects. Invasive procedures are often necessary for the physiologist to understand the mechanisms behind various physiological parameters. In fish, measurements of cardiovascular parameters such as blood flow and blood pressure involve handling, anaesthesia and surgical implantation of catheters and flow probes in and around vessels and sutures to close the incisions. In traditional laboratory experiments, standard bench top blood pressure and blood flow measuring units are used, which means that the animals are 'hardwired' to the equipment during the experiments. Catheters and leads from flow probes penetrate the body wall and increase the risk of infection. Furthermore, to prevent tangling and ripping of wires the animals are most often confined in small containers, which severely limit the range over which they can move with the risk of introducing confinement stress. The animals are usually left for 18 -48 h before experimentation is initiated, the main reason for such shorts periods being the high risk of infection after an extensive surgery.1 In cases where catheters are used, limits on the time where these will remain open may also be decisive. However, unless appropriate recovery time is ensured following surgical procedures and instrumentation, major concerns are the validity of data and ethical considerations. In a study on rainbow trout Oncorhynchus mykiss using bioelectric potential recordings to measure heart rate, fH (i.e. a non-invasive method) the fish were handled and then left to recover for at least three days after which their basal heart r...

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Effects of surgically implanted dummy transmitters on the South American catfish Jundiá (Rhamdia quelen)

Cited by 15 publications

References 7 publications

Diel and seasonal movements of grumatã Prochilodus lineatus (Valenciennes 1836) (Characiformes: Prochilodontidae) in the Sinos River, Southern Brazil

Diel and seasonal movements of grumatã Prochilodus lineatus (Valenciennes 1836) (Characiformes: Prochilodontidae) in the Sinos River, Southern Brazil

Implante quirúrgico de radiotransmisores en Diplomystes camposensis (Siluriformes, Diplomystidae)

Recovery of gastric evacuation rate in Atlantic codGadus morhuaL surgically implanted with a dummy telemetry device

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