نتایج جستجو برای: alosa braschnikowi

تعداد نتایج: 268  

Journal: :Environmental Health Perspectives 1999
W L Fairchild E O Swansburg J T Arsenault S B Brown

Historical aerial applications of the insecticide Matacil 1.8D provide an opportunity to look for potential effects of the endocrine disrupting compound 4-nonylphenol (4-NP) on Atlantic salmon (Salmo salar) populations. Matacil 1.8D contained the carbamate insecticide aminocarb, with 4-NP as primary solvent. Between 1975 and 1985 Matacil 1.8D was applied to forests in Atlantic Canada to control...

Journal: :Molecular ecology 2008
Eric P Palkovacs Kirstin B Dion David M Post Adalgisa Caccone

Alewife, Alosa pseudoharengus, populations occur in two discrete life-history variants, an anadromous form and a landlocked (freshwater resident) form. Landlocked populations display a consistent pattern of life-history divergence from anadromous populations, including earlier age at maturity, smaller adult body size, and reduced fecundity. In Connecticut (USA), dams constructed on coastal stre...

ژورنال: محیط زیست جانوری 2017

هدف از این مطالعه تعیین ترکیب گونه ای، پراکنش زمانی و مکانی ماهیان مختلف در سه روش مختلف صید سواحل جنوبی دریای خزر (منطقه گهرباران) طی آذر 1392 تا تیر 1393 می باشد. براساس نتایج به ­دست آمده در پره ریز چشمه 17 گونه از انواع ماهیان صید شدند که بیش ­ترین تعداد ماهیان را دو گونه Neogobius caspia و boy...

Journal: :Molecular ecology resources 2008
Nancy A Schable Ashley M Kuenzi Carrie A Drake Nadine C Folino-Rorem John A Darling

Cordylophora caspia, a colonial hydrozoan native to the Ponto-Caspian region, has become a common invader of both fresh and brackish water ecosystems of North America and Europe. We describe 11 polymorphic microsatellite loci for this species. Preliminary analyses indicate that population substructure may contribute to departures from Hardy-Weinberg equilibrium. In addition, new loci failed to ...

Journal: :Bulletin Français de la Pêche et de la Pisciculture 2001

Journal: :Canadian Journal of Fisheries and Aquatic Sciences 2022

Diadromous species act as nutrient vectors between their marine and freshwater habitats. Few valuations of this regulating service exist none at the scale distribution ranges. This large-scale approach seems particularly relevant for moving exchanging individuals across borders territories these populations may strongly depend upon each other in terms population viability provision ecosystem se...

2000
David H. Secor Jay R. Rooker

The ef®ciency with which estuarine habitats produce ®sh is poorly understood due to the complexity of life cycles. Spatial dynamics of estuarine ®shes comprise retentive and dispersive behaviors which occur on seasonal and ontogenetic scales. Salinity is an important scalar in the spatial dynamics of estuarine ®shes, that may affect production and dispersal. In this paper, we review investigati...

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