Results 71 to 80 of about 21,186 (271)

ELASMOBRANCHS BALANCE UREA [PDF]

Journal of Experimental Biology, 2006
![Figure][1] For most creatures, urea is a nasty toxin best got rid of, but for many elasmobranchs, it keeps them in balance with their salty environment. Yet despite this apparently amicable relationship, high tissue levels of urea still have nasty side effects on proteins.
openaire   +1 more source

Elasmobranch bycatch in the demersal prawn trawl fishery in the Gulf of Papua, Papua New Guinea

Scientific Reports, 2019
The elasmobranch bycatch of the Gulf of Papua Prawn Fishery is investigated in detail for the first time. Fisheries observers collected data on the elasmobranch bycatch from a total of 403 trawl sets (1,273 hrs) in the Gulf of Papua.
W. White, L. Baje, C. Simpfendorfer, S. Appleyard, A. Chin, B. Sabub, E. Rochel, G. Naylor   +7 more
semanticscholar   +1 more source

The status of shark and ray fishery resources in the Gulf of California: applied research to improve management and conservation [PDF]

, 2009
Seasonal surveys were conducted during 1998–1999 in Baja California, Baja California Sur, Sonora, and Sinaloa to determine the extent and activities of artisanal elasmobranch fisheries in the Gulf of California. One hundred and forty–seven fishing sites,
Bizzarro, Joseph J., Cailliet, Gregor M., Castillo–Géniz, J. Leonardo, Hueter, Robert E., Márquez– Farías, J. Fernando, Smith, Wade D., Tyminski, John, Villavicencio–Garayzar, Carlos J.   +7 more
core  

Review of Magnetic Shark Deterrents: Hypothetical Mechanisms and Evidence for Selectivity

, 2014
Several papers published since 2006 describe effects of magnetic fields on elasmobranchs and assess their utility in reducing negative interactions between sharks and humans, including bycatch reduction.
Courtney, Joshua, Courtney, Michael, Courtney, Ya'el   +2 more
core   +1 more source

Early life sensory ability—ventilatory responses of thornback ray embryos (Raja clavata) to predator-type electric fields [PDF]

, 2015
Predator avoidance is fundamental for survival and it can be particularly challenging for prey animals if physical movement away from a predatory threat is restricted. Many sharks and rays begin life within an egg capsule that is attached to the sea bed.
Ballard, Bedore, Bigelow, Bodznick, Clark, Cousseau, Cox, Dulvy, Dulvy, Evans, Foulley, Freitas, Gannon, Giguère, Gill, Herskin, Hoff, Kempster, Kimber, Leonard, Long, Lucifora, Luer, Martin, Moore, Oulton, Peters, Post, Richards, Semeniuk, Semeniuk, Sih, Sisneros, Thomason, Tricas, Venables, Warkentin, Warkentin   +37 more
core   +1 more source

Monitoring small‐scale fisheries through participatory, app‐based surveys in the tropical archipelago of São Tomé and Príncipe

Conservation Science and Practice, EarlyView.
Small Island Developing States have limited capacity to monitor Small Scale Fisheries, despite their high dependence on marine resources. Participatory monitoring of Small Scale Fisheries can fill data gaps while integrating resource users into fisheries management.
Guillermo Porriños, Philip D. Doherty, Ana Nuno, Manuel da Graça, Edson dos Santos, Sinaida Espírito Santo, Katy Walker, Albertino Santos, Márcio Guedes, Lodney Nazaré, Tiago Capela Lourenço, Luisa Madruga, Litoney Matos, Berry Mulligan, Mafalda Navas, Rita F. Ramos, Nina da Rocha, Kristian Metcalfe   +17 more
wiley   +1 more source

The repulsive and feeding-deterrent effects of electropositive metals on juvenile sandbar sharks (Carcharhinus plumbeus) [PDF]

, 2009
Reducing shark bycatch and depredation (i.e., damage caused by sharks to gear, bait, and desired fish species) in pelagic longline fisheries targeting tunas and swordfish is a priority. Electropositive metals (i.e., a mixture of the lanthanide elements
Brill, Richard, Bushnell, Peter, Smith, Leonie, Speaks, Coley, Stroud, Eric, Sundaram, Rumya, Wang, John   +6 more
core   +1 more source

Visual Modelling to Predict Behavioural Responses of Catsharks, Skates, and Plaice to Artificial Light for Use in Bycatch Reduction

Fisheries Management and Ecology, EarlyView.
ABSTRACT Light can be used to deter bycatch from fishing nets, but few studies have aimed to quantify how species view and respond to light. Here, we used visual models to predict how target (plaice Pleuronectes platessa) and bycatch (small‐spotted catshark Scyliorhinus canicular and undersized skates, Raja spp) species, captured in mixed demersal ...
Jasmine Somerville, Jon Blount, Martin Stevens   +2 more
wiley   +1 more source

Environmental factors modulate the distribution of elasmobranchs in southern Mozambique

Frontiers in Marine Science
Investigating the spatiotemporal ecology of elasmobranchs is an important precursor to their effective management. Understanding long-term patterns in the movement and habitat use of threatened species can improve management plans so that they yield ...
Calum J. G. Murie, Calum J. G. Murie, Simon P. Oliver, Simon P. Oliver, Livia Gavard, Mario Lebrato, James Brown, Andrew Lawrence   +7 more
doaj   +1 more source

Thyrocalcitonin Studies in Elasmobranch Fish [PDF]

Zoologica Africana, 1969
Zoologica Africana 4(1): 95 ...
Louw, GN, Stahl, PD, Kenny, AD
openaire   +2 more sources