Results 61 to 70 of about 2,457 (160)

How Fragmented Is eDNA? A Case Study on Shark DNA in Tropical Reef Seawater

Environmental DNA, Volume 7, Issue 4, July–August 2025.
This study quantified mitochondrial eDNA fragment lengths in offshore tropical seawater using qPCR assays targeting amplicons from 119 to 15,727 bp in tiger shark (Galeocerdo cuvier). Copy numbers steeply declined with increasing fragment size, with successful amplification up to 1518 bp and a calculated mean undamaged fragment size of 256 bp.
Katrina M. West, Bruce Deagle
wiley   +1 more source

Length-weight relationships of commercially important marine fishes and shellfishes of the southern coast of Karnataka, India [PDF]

, 2004
The parameters of the length-weight relationship of the form W = aLb are presented for 51 species of commercially important marine fishes and shellfishes caught along the southern coast of Karnataka, India.
Abdulrahiman, K.P., Harishnayak, T., Mohamed, K.S., Zacharia, P.U.   +3 more
core   +1 more source

Unseen Experts of the Sea: Fishers' Local Ecological Knowledge Reveals Elasmobranch Hotspot Decline Around Curaçao, Dutch Caribbean

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 6, June 2025.
ABSTRACT Fishing pressure is the primary threat to coastal elasmobranch populations, and understanding its impact requires long‐term regional data—often lacking in complex, small‐scale fishery settings. This is the case for Curaçao, a southern Dutch Caribbean island with an unmonitored artisanal fishery where, according to anecdotes, elasmobranchs have
Lisa Hübner, Guido Leurs, Lisa Bruil, Ise A. Grimm, Javier A. V. Diaz, Faisal F. Dilrosun, Frensel Mercelina, Kasper J. Meijer, Loren McClenachan, Karin M. de Boer, Mark J. A. Vermeij, Laura L. Govers   +11 more
wiley   +1 more source

Life history and population dynamics of the finetooth shark (Carcharhinus isodon) in the northeastern Gulf of Mexico [PDF]

, 2003
The life history and population dynamics of the finetooth shark (Carcharhinus isodon) in the north-eastern Gulf of Mexico were studied by determining age, growth, size-at-maturity, natural mortality, productivity, and elasticity of vital rates of the ...
Bethea, Dana M., Carlson, John K., Cortés, Enric   +2 more
core  

Nursery Resource Use Dynamics in Great Hammerheads (Sphyrna mokarran) Across Ontogeny

Ecology and Evolution, Volume 15, Issue 6, June 2025.
The ecological trade‐offs required by nursery dependence are poorly understood. Using multi‐tissue stable isotope analysis, this research provides evidence of constrained resource use in juvenile great hammerheads (Sphyrna mokarran) associated with year‐round dependence on the Biscayne Bay nursery during their first two years of life.
John F. Hlavin, Catherine C. Macdonald
wiley   +1 more source

Scaling of bite force corresponds with ontogenetic niche shifts in coastal elasmobranchs

Frontiers in Marine Science
IntroductionPredators, such as sharks, play important ecological roles in coastal ecosystems when abundant and these roles change over ontogeny. However, these shifts in ecological role are often not evaluated in light of feeding performance.
Joshua A. Cullen, Joshua A. Cullen, Christopher D. Marshall, Christopher D. Marshall   +3 more
doaj   +1 more source

Sustainability of elasmobranchs caught as bycatch in a tropical prawn (shrimp) trawl fishery [PDF]

, 2002
The bycatch of Australia’s northern prawn fishery (NPF) comprises 56 elasmobranch species (16 families). The impact of this fishery on the sustainability of these species has not been addressed.
Brewer, David T., Heales, Don S., Miller, Margaret J., Stobutzki, Ilona C.   +3 more
core  

Defining Sex-Specific Habitat Suitability for a Northern Gulf of Mexico Shark Assemblage

Frontiers in Marine Science, 2020
Understanding the factors that influence species’ distributions is crucial for implementing effective management and conservation practices, yet difficult for highly vagile species like sharks.
J. M. Drymon, J. M. Drymon, S. Dedman, J. T. Froeschke, E. A. Seubert, A. E. Jefferson, A. E. Jefferson, A. M. Kroetz, J. F. Mareska, S. P. Powers   +9 more
doaj   +1 more source

Fishery of elasmobranchs with some observations on the biology and stock assessment of Carcharhinus limbatus (P. Muller & Henle, 1839) exploited along Malabar coast [PDF]

, 2012
Elasmobranchs are caught in trawls, gillnets and longlines along the Malabar region of Kerala and they are landed almost round the year, accounting less than 1% of the total catch.
Manojkumar, P P, Pavithran, P P, Zacharia, P U   +2 more
core  

Closing the air gap: the use of drones for studying wildlife ecophysiology

Biological Reviews, Volume 100, Issue 3, Page 1206-1228, June 2025.
ABSTRACT Techniques for non‐invasive sampling of ecophysiological data in wild animals have been developed in response to challenges associated with studying captive animals or using invasive methods. Of these, drones, also known as Unoccupied Aerial Vehicles (UAVs), and their associated sensors, have emerged as a promising tool in the ecophysiology ...
Adam Yaney‐Keller, Rebecca R. McIntosh, Rohan H. Clarke, Richard D. Reina   +3 more
wiley   +1 more source