Results 21 to 30 of about 1,598 (178)

Thermal tolerance and hypoxia tolerance are associated in blacktip reef shark (Carcharhinus melanopterus) neonates [PDF]

Journal of Experimental Biology, 2020
ABSTRACT Thermal dependence of growth and metabolism can influence thermal preference and tolerance in marine ectotherms, including threatened and data-deficient species. Here, we quantified the thermal dependence of physiological performance in neonates of a tropical shark species (blacktip reef shark, Carcharhinus melanopterus) from ...
Ian A. Bouyoucos, Phillip R. Morrison, Ornella C. Weideli, Eva Jacquesson, Serge Planes, Colin A. Simpfendorfer, Colin J. Brauner, Jodie L. Rummer   +7 more
openaire   +3 more sources

Parasitic copepods (Crustacea, Hexanauplia) on fishes from the lagoon flats of Palmyra Atoll, Central Pacific [PDF]

ZooKeys, 2019
We surveyed copepods parasitic on the fishes at Palmyra, a remote atoll in the Central Indo-Pacific faunal region. In total, we collected 849 individual fish, representing 44 species, from the intertidal lagoon flats at Palmyra and recovered 17 parasitic
Lilia C. Soler-Jiménez, F. Neptalí Morales-Serna, Ma. Leopoldina Aguirre-Macedo, John P. Mclaughlin, Alejandra G. Jaramillo, Jenny C. Shaw, Anna K. James, Ryan F. Hechinger, Armand M. Kuris, Kevin D. Lafferty, Victor M. Vidal-Martínez   +10 more
doaj   +3 more sources

Long-term changes in species composition and relative abundances of sharks at a provisioning site. [PDF]

PLoS ONE, 2014
Diving with sharks, often in combination with food baiting/provisioning, has become an important product of today's recreational dive industry. Whereas the effects baiting/provisioning has on the behaviour and abundance of individual shark species are ...
Juerg M Brunnschweiler, Kátya G Abrantes, Adam Barnett   +2 more
doaj   +1 more source

The shark assemblage at French Frigate Shoals atoll, Hawai'i: species composition, abundance and habitat use. [PDF]

PLoS ONE, 2011
Empirical data on the abundance and habitat preferences of coral reef top predators are needed to evaluate their ecological impacts and guide management decisions.
Jonathan J Dale, Austin M Stankus, Michael S Burns, Carl G Meyer   +3 more
doaj   +1 more source

Defining ecological roles of sharks on coral reefs. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Sharks have often been perceived to play a critical role in the dynamics of coral reef ecosystems globally. Yet, there is relatively little evidence to support this idea across all but a limited set of species and contexts. Research on the roles and importance of reef sharks has been complicated by logistical challenges in collecting data on ...
Klinard NV, Mull CG, Heithaus MR, MacNeil MA.   +3 more
europepmc   +2 more sources

Genetic Diversity and Population Structure of Squalus cf. mitsukurii (Chondrichthyes: Squalidae) Revealed by ddRAD Sequencing. [PDF]

Anim Genet
ABSTRACT Assessing genetic structure across ocean basins is essential to understand connectivity and guide conservation in data‐deficient open‐water sharks. In this study, we examined the population genomics of Squalus cf. mitsukurii by analyzing tissue samples collected from two distant regions: California, USA (Pacific Ocean) and Pernambuco, Brazil ...
Adachi AMCL, Ariza AA, Ribeiro GDS, Roque PCG, Rotundo MM, Vianna M, Delpiani G, Delpiani SM, de Astarloa JMD, Oliveira C, Foresti F, da Cruz VP.   +11 more
europepmc   +2 more sources

Location, Location, Location! Evaluating Space Use of Captive Aquatic Species—A Case Study with Elasmobranchs

Journal of Zoological and Botanical Gardens, 2022
The space use of captive animals has been reliably used as a tool to measure animal welfare in recent years. However, most analyses of space use focus primarily on terrestrial animals, with very little emphasis placed on the space use of aquatic animals.
Alexis M. Hart, Zac Reynolds, Sandra M. Troxell-Smith   +2 more
doaj   +1 more source

The costs and healing rates of minor injuries in neonatal reef sharks. [PDF]

J Fish Biol
Abstract Elasmobranch fishes (i.e., sharks, skates, and rays) exhibit remarkable wound‐healing capabilities and consistently maintain a high capacity for tissue regeneration throughout their lives. This high capacity for wound healing may be particularly important for neonatal elasmobranchs that are still developing their immune system. However, little
Debaere SF, Weideli OC, Daly R, Milanesi EMC, Trujillo JE, Bouyoucos IA, Mourier J, Chin A, Planes S, De Boeck G, Rummer JL.   +10 more
europepmc   +2 more sources

Summarising 40 years of gastric lavage studies to evaluate efficiency and survival in sharks and rays. [PDF]

J Fish Biol
Abstract Traditionally, lethal stomach dissection has been used to study the diets of sharks and rays, but conservation and animal welfare concerns necessitate non‐lethal alternatives, such as gastric lavage (stomach or gut flushing). In this study, we summarised gastric lavage studies on elasmobranchs to identify which species/groups it has been ...
Myers J, Sheaves M, Barnett A.
europepmc   +2 more sources

The Phenomenon of Piebaldism in Sharks: A Review of Global Sightings and Patterns. [PDF]

Ecol Evol
Chromatic disorders like piebaldism—a rare form of leucism causing partial pigment loss—have been documented in 25 wild shark cases across 17 species and 11 families, with varying anatomical distribution. This study compiles published and unpublished records to better understand the taxonomic and geographical spread of piebaldism and its potential ...
Whitehead DA, Parmegiani A, Gobbato J, Mizyan M, Askin A, Scroglieri S, Galli P, Seveso D, Montano S, Gayford JH.   +9 more
europepmc   +2 more sources