Results 31 to 40 of about 3,693 (163)

Spiral valve parasites of blue and common thresher sharks as indicators of shark feeding behaviour and ecology

open access: yesJournal of Fish Biology, Volume 97, Issue 2, Page 354-361, August 2020., 2020
Abstract This study documented the parasite faunas of the spiral valves of blue sharks Prionace glauca (L. 1758) and common thresher sharks Alopias vulpinus (Bonnaterre, 1788) caught in the California Current Large Marine Ecosystem (CCLME) north of the Mexican border.
Antonella Preti   +6 more
wiley   +1 more source

Efficacy of metabarcoding for identification of fish eggs evaluated with mock communities

open access: yesEcology and Evolution, Volume 10, Issue 7, Page 3463-3476, April 2020., 2020
We examine the effectiveness of using metabarcoding methods on mock communities of known fish egg DNA using six mock communities with known ratios of species and two samples from a large field collection of fish eggs. We examine the ability of our metabarcoding methods to detect species and relative proportion of species identified in each mock ...
Elena M. Duke, Ronald S. Burton
wiley   +1 more source

Long-term changes in the mean trophic level of Central Chile fishery landings

open access: yesScientia Marina, 2005
We explore long-term changes in the mean trophic level (TLm) of Central Chile fishery landings, using a 21 years data series (1979-1999) of official landings (Chilean Fisheries Service) of 16 species that comprise about 95% of total landing, and their ...
Hugo Arancibia, Sergio Neira
doaj   +1 more source

First Record of Anisakis sp. Third-Stage Larvae (Nematoda) Occurrence, as a Human Risk, in Pacific Jack Mackerel from a Fish Processing and Packaging Plant in the North of Iran

open access: yesJournal of BioScience and Biotechnology, 2023
Purpose: This research was performed with the aim of hygienic tracking for fish-borne parasitic contamination imported by Jack mackerel fish from certain parts of the world in a fish processing unit during a health inspection in the northern region of ...
Mehrdad Asgharnia   +2 more
doaj  

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

open access: yesMarine Mammal Science, Volume 35, Issue 1, Page 164-186, January 2019., 2019
Abstract Harbor porpoises (Phocoena phocoena) are commonly observed in Oregon's nearshore marine environment yet knowledge of their ecosystem use and behavior remains limited, generating concerns for potential impacts on this species from future coastal development.
Amanda K. Holdman   +3 more
wiley   +1 more source

Short‐Term Pain and Long‐Term Gain: Using Phased‐In Minimum Size Limits to Rebuild Stocks—the Pacific Bluefin Tuna Example

open access: yesTransactions of the American Fisheries Society, Volume 147, Issue 6, Page 1015-1029, November 2018., 2018
Abstract Like many stocks, the Pacific Bluefin Tuna Thunnus orientalis has been considerably depleted. High exploitation rates on very young fish have reduced the spawning stock biomass (SSB) to 2.6% of the unexploited level. We provide a framework for exploring potential benefits of minimum size regulations as a mechanism for rebuilding stocks, and we
Lisa E. Ailloud   +2 more
wiley   +1 more source

Fish Larvae Response to Biophysical Changes in the Gulf of California, Mexico (Winter‐Summer)

open access: yesJournal of Marine Sciences, Volume 2013, Issue 1, 2013., 2013
We analyzed the response of fish larvae assemblages to environmental variables and to physical macro‐ and mesoscale processes in the Gulf of California, during four oceanographic cruises (winter and summer 2005 and 2007). Physical data of the water column obtained through CTD casts, sea surface temperature, and chlorophyll a satellite imagery were used
Raymundo Avendaño-Ibarra   +5 more
wiley   +1 more source

The feeding ecology of some zooplankters that are important prey items of larval fish [PDF]

open access: yes, 1984
Diets of 76 species of fish larvae from most oceans of the world were inventoried on the basis of information in 40 published studies. Although certaln geographlc, size- and taxon-specific patterns were apparent, certain zooplankton taxa appeared in the ...
Turner, Jefferson T.
core  

Results of Jack Mackerel tagging study, 1971-75 [PDF]

open access: yes, 1975
Methods and materials used to tag and recapture jack mackerel, Trachurus symmetricus, off the coast of southern Ca1ifornia and Baja California, Mexico, are described.
Gregory, Paul A., Tasto, Robert N.
core  

Diel variation in vertical distribution of an offshore ichthyoplankton community off the Oregon coast [PDF]

open access: yes, 2007
We examined the diel ver-tical distribution, concentration, and community structure of ichthyoplank-ton from a single station 69 km off the central Oregon coast in the northeast Pacific Ocean. The 74 depth-stratified samples yielded 1571 fish larvae from
Auth, Toby D.   +2 more
core  

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