Results 91 to 100 of about 14,511 (238)

Anchoring from shipping as a disturbance agent to temperate rocky reef fish: marked shifts observed in trophic and taxonomic guilds

Frontiers in Conservation Science
Anchoring impacts to marine environments from large, ocean-going ships is increasingly recognized as a global threat to marine biota. To date, no replicated assessment examining anchor disturbance to fish assemblages exists at the scale of ocean-going ...
Allison Broad, Matthew J. Rees, Timothy C. Ingleton, Timothy C. Ingleton, Bradley Morris, Andrew R. Davis   +5 more
doaj   +1 more source

The reproductive biology and cycle of Rioraja agassizi (Müller and Henle, 1841) (Chondrichthyes: Rajidae) in southeastern Brazil, SW Atlantic Ocean

Scientia Marina, 2007
Specimens of Rioraja agassizi were collected at Guarujá pier, São Paulo State, Brazil, from March 2005 to March 2006. A total of 275 males were captured.
María Cristina Oddone, Alberto F. Amorim, Patricia L. Mancini, Walter Norbis, Gonzalo Velasco   +4 more
doaj   +1 more source

European Shark Fisheries: A Preliminary Investigation into Fisheries, Conversion Factors, Trade Products, Markets and Management Measures [PDF]

, 2007
Recommends new regulations to prevent shark finning -- an illegal practice in which a shark's fins are removed and its carcass dumped at sea -- and stresses the urgent need for effective shark conservation ...
Bernard Seret, Caroline Raymakers, Fabrizio Serena, Jim Ellis, John Carlson, Mario Pinho, Maurice Clarke, Nils Roar Hareide, Sandrine Polti, Sarah Fowler, Shelley Clarke, Sonja Fordham   +11 more
core  

Occurrence of multiple congenital anomalies in Potamotrygon amandae (Elasmobranchii, Potamotrygoninae) embryos, including the first report of bicephaly

Journal of Fish Biology, EarlyView.
Abstract Reports of teratogenic embryos in elasmobranchs have been documented in multiple species, with proposed aetiologies including environmental disturbances, genetic mutations, predation, exposure to endocrine‐disrupting compounds and maternal stress.
Douglas de Castro Ribeiro, Raquel Lopes Queiroz, Cristiéle da Silva Ribeiro   +2 more
wiley   +1 more source

Age validation, growth, mortality, and demographic modeling of spotted gully shark (Triakis megalopterus) from the southeast coast of South Africa [PDF]

, 2011
This study documents validation of vertebral band-pair formation in spotted gully shark (Triakis megalopterus) with the use of fluorochrome injection and tagging of captive and wild sharks over a 21-year period.
Booth, Anthony J., Foulis, Alan J., Smale, Malcolm J.   +2 more
core   +1 more source

First record of young‐of‐the‐year smooth hammerhead (Sphyrna zygaena) in coastal waters of Galicia, northwest Spain

Journal of Fish Biology, EarlyView.
Abstract The smooth hammerhead (Sphyrna zygaena) is typically considered an oceanic species and is only rarely observed in the cooler coastal waters of the northeastern Atlantic. On 20 December 2024, a juvenile S. zyganea was captured at 25 m depth in the inner Ría de Pontevedra (Rías Baixas, northwest Spain).
Xabier Pin, Kenn Papadopoulo, Pablo Covelo, Gonzalo Mucientes   +3 more
wiley   +1 more source

Age and growth of the Scalloped Hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834), from the southern Brazilian coast Idade e crescimento do tubarão-martelo-entalhado, Sphyrna lewini (Griffith and Smith, 1834), da costa sul do Brasil

Brazilian Journal of Biology, 2011
Age and growth studies for the scalloped hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834) caught along the southern Brazilian coast, were based on ring measurements of vertebrae sections of 115 males, 116 females and 14 unknown sexed sharks ...
JE. Kotas, V. Mastrochirico, M. Petrere Junior   +2 more
doaj   +1 more source

An Integrated Approach to Determining the Risk of Overexploitation for Data-Poor Pelagic Atlantic Sharks [PDF]

, 2008
Assesses the risk of over-exploitation of sharks in Atlantic longline fisheries using three metrics based on multivariate statistics as a way to make management recommendations for species with limited data.

core  

Fish welfare in a changing world: New developments and current challenges

Journal of Fish Biology, EarlyView.
Abstract The welfare of non‐human animals is central to ethical discussions on animal use, with increasing attention to fish welfare across research, aquaria, aquaculture, and fisheries. This paper reviews current theoretical approaches to animal welfare and recent advances in defining and assessing fish welfare since the seminal paper by Huntingford ...
Sonia Rey Planellas, João L. Saraiva, Eliane Gonçalves‐de‐Freitas, Pablo Arechavala‐Lopez, Bernice Bovenkerk, Michael Breen, Steven J. Cooke, Martin Føre, Lene Northwood, Lars Helge Stien, Sunil Kadri, Chris Noble, Jonatan Nilsson, Fernando Rodriguez, Cosme Salas, Peter Sandøe, Hans van de Vis   +16 more
wiley   +1 more source

Biological Aspects of Juveniles of the Common Stingray, Dasyatis pastinaca (Linnaeus, 1758) (Elasmobranchii, Dasyatidae), from the Central Mediterranean Sea

Journal of Marine Science and Engineering, 2020
Data on the biology of Dasyatis pastinaca are absent from the Ionian Sea and only a few studies were conducted in the Mediterranean Sea. Some biological and ecological aspects of D.
Francesco Tiralongo, Giuseppina Messina, Bianca Maria Lombardo   +2 more
doaj   +1 more source