Results 91 to 100 of about 2,748 (207)
Литосфера, 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
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Drivers and rates of stock assessments in the United States.
PLoS 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
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A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes [PDF]
, 2017 The fossil record of chondrichthyans (sharks, rays and chimaeroids) principally consists of isolated teeth, spines and dermal denticles, their cartilaginous skeleton being rarely preserved.
Billon Bruyat, Jean Paul +3 more
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Environmental distribution of Bathonian (Middle Jurassic) neoselachians in southern England [PDF]
, 2004 Within the Bathonian (Middle Jurassic) a wide range of depositional environments were present across Britain. Within this dominantly carbonate shelf setting, there is a general palaeoenvironmental transition from open marine shelf in the south of England,
Underwood, Charlie J., Ward, D.J.
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Exploring intraspecific life history patterns in sharks [PDF]
, 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.
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Revealing elasmobranch diversity across the Cretaceous-Paleogene boundary in the Central Tethys (Byala, Bulgaria) [PDF]
Fossil RecordExtensive bulk-sampling of the continuous K-Pg succession at Byala (Central Tethys) provides high-resolution insights into elasmobranch responses to the end-Cretaceous mass extinction of a deep-marine environmental setting. The studied section represents
Iris Feichtinger +6 more
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Testicular histology of Mustelus schmitti springer, 1939 (Elasmobranchii, triakidae) [PDF]
, 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
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FishesThe speckled smooth-hound Mustelus mento is an endemic coastal shark from the southeastern Pacific, currently listed as “Critically Endangered” due to intense fishing pressure and the absence of species-specific management across its distribution range ...
Krishna Tapia +4 more
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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. +2 more
core +1 more source
Actualidades Biológicas, 2012 El objetivo de este trabajo es mostrar las utilidades del programa informático ModestR, en estudios sobre distribución de especies en ecosistemas marinos y de agua dulce de Colombia.
Patricia Pelayo-Villamil +10 more
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