Results 81 to 90 of about 2,701 (193)

Drivers and rates of stock assessments in the United States.

open access: yesPLoS ONE, 2018
Fisheries management is most effective when based on scientific estimates of sustainable fishing rates. While some simple approaches allow estimation of harvest limits, more data-intensive stock assessments are generally required to evaluate the stock's ...
Philipp Neubauer   +4 more
doaj   +1 more source

Dietary metabarcoding of keystone sardine species reveals the importance of their ichthyoplankton prey in food webs of the Southern Brazilian Bight fisheries

open access: yesFisheries Oceanography, Volume 33, Issue 4, July 2024.
Abstract Clupeiform fishes are ecologically and economically important species contributing to industrial and artisanal fisheries worldwide. They represent key links in food webs, influencing the dynamic between trophic levels. The dietary interactions of these species are poorly studied in many regions, yet essential for fisheries management.
Anna Karolina Oliveira de Queiroz   +10 more
wiley   +1 more source

Exploring intraspecific life history patterns in sharks [PDF]

open access: yes, 2006
Marine ecosystems compose the major source (85%) of world fisheries production (Garcia and Newton, 1997). Although only a few fish species tend to dominate fishery catches (Jennings et al., 2001), a large diversity of fishes representing varied ...
Cope, Jason M.
core  

Testicular histology of Mustelus schmitti springer, 1939 (Elasmobranchii, triakidae) [PDF]

open access: yes, 2013
Mustelus schmitti presenta unos testiculos de desarrollo diametrico en la que espermatocistos forma redonda muestran una disposición zonal. Cada zona tiene espermatocistos que contienen células germinales en una sola fase de desarrollo.
Rojas, Fernando Oscar
core   +1 more source

БИОСТРАТИГРАФИЯ И ИЗМЕНЕНИЕ ПАЛЕОБИОТЫ НА ГРАНИЦЕ ПАЛЕОЦЕНА И ЭОЦЕНА В РАЗРЕЗЕ ПЕРШИНСКИЙ (СРЕДНЕЕ ЗАУРАЛЬЕ)

open access: yesЛитосфера, 2019
Выполнено описание разреза и биостратиграфическое расчленение палеогеновых отложений в разрезе Першинский, расположенном в южной части Среднего Зауралья (Курганская область). Проанализированы изменения состава морской микро- (динофлагеллаты) и макробиоты

doaj  

A Neoselachian shark from the non-marine Wessex Formation (Wealden Group: early Cretaceous, Barremian) of the Isle of Wight, southern England [PDF]

open access: yes, 2006
Bulk screening of Early Cretaceous (Barremian) Wessex Formation strata exposed on the south-east coast of the Isle of Wight, southern England, has resulted in the recovery of neoselachian shark teeth referred to the scyliorhinid Palaeoscyllium. These are
Sweetman, Steven C.   +1 more
core   +1 more source

The complete mitochondrial genome of a gray reef shark, Carcharhinus amblyrhynchos (Carcharhiniformes: Carcharhinidae), from the Western Indian Ocean

open access: yesMitochondrial DNA. Part B. Resources, 2020
We present the mitochondrial genome sequence of a gray reef shark, Carcharhinus amblyrhynchos (Bleeker 1856), a coral reef associated species. This is the first mitogenome for this species from the western Indian Ocean.
Ela Patel   +7 more
doaj   +1 more source

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

open access: yes, 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.   +2 more
core   +1 more source

Reproductive aspects of the oceanic whitetip shark, Carcharhinus longimanus (Elasmobranchii: Carcharhinidae), in the equatorial and southwestern Atlantic Ocean [PDF]

open access: yes, 2013
The present study sought to study the reproductive biology of the oceanic whitetip shark, Carcharhinus longimanus, in the equatorial and southwestern Atlantic Ocean.
AMORIM A. F.   +37 more
core   +3 more sources

A partial rostrum of the Porbeagle shark Lamna nasus (Lamniformes, Lamnidae) from the Miocene of the North Sea basin and the taxonomic importance of rostral morphology in extinct sharks [PDF]

open access: yes, 2010
A fragmentary rostrum of a lamnid shark is recorded from the upper Miocene Breda Formation at Liessel (Noord-Brabant, The Netherlands); it constitutes the first elasmobranch rostral process to be described from Neogene strata in the North Sea Basin ...
Mollen, F.H.
core  

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