Results 81 to 90 of about 39,320 (339)

The Effects of Nutrient Additions on Kokanee in Dworshak Reservoir, Idaho

Fisheries Management and Ecology, EarlyView.
ABSTRACT We investigated the effects of whole reservoir nitrogen (N) addition on kokanee growth in Dworshak Reservoir, Idaho. We hypothesized that N addition would improve the growth of kokanee (Oncorhynchus nerka) at a given level of abundance by increasing the availability of Daphnia, an important food source.
Sean M. Wilson, Matthew P. Corsi, Eric J. Stark, Eli A. Felts, Andrew M. Dux, Ryan S. Hardy   +5 more
wiley   +1 more source

Spatio-temporal variability in life cycle strategy of four pelagic Antarctic copepods: Rhincalanus gigas, Calanoides acutus, Calanus propinquus and Metridia gerlachei

, 2002
P(論文)Spatio-temporal variability in life cycle strategy of four pelagic Antarctic copepods, Rhincalanus gigas, Calanoides acutus, Calanus propinquus and Metridia gerlachei was studied, including their copepodite stage composition, using the multiyear ...
Fukuchi, Mitsuo, Ishimaru, Takashi, Hosie, Graham W., Chiba, Sanae   +3 more
core   +1 more source

Interannual Variations in Distribution and Density of Japanese Anchovy (Engraulis japonicus) Larvae in the Shelf‐Break Region of East China Sea During Spring (2001–2022)

Fisheries Oceanography, EarlyView.
ABSTRACT Japanese anchovy (Engraulis japonicus) is the most abundant fish in the East China Sea (ECS) and an important fishery resource throughout its life stages. Using samples collected along the ECS shelf‐break in April over a 22‐year period (2001–2022), we examined the horizontal distribution and interannual variability of larval density (mean ...
Chiyuki Sassa, Satoshi Kitajima, Motomitsu Takahashi, Koh Nishiuchi, Yoshinobu Konishi, Youichi Tsukamoto   +5 more
wiley   +1 more source

Phylogeny and Genetic Population Structure of Dominant Copepods in Two Ponds with Contrasting Salinities in the Solar Saltern of Sfax (Tunisia) Based on Mitochondrial (COI and Cytb) and Nuclear (18S) DNA Sequences

Diversity
Due to the complexity of taxonomic classification based on the classical morphological characters of copepods, phylogenies have been ambiguous. In this study, we investigate the phylogeny of copepods, including four species from three orders, in the ...
Chiraz Ladhar, Françoise Denis, Wassim Guermazi, Neila Annabi-Trabelsi, Nathalie Casse, Habib Ayadi, George N. Hotos   +6 more
doaj   +1 more source

Impacts of Ocean Warming on Sex Ratio of Yellow Striped Butterfish Labracoglossa argentiventris Around the Izu Islands, Japan

Fisheries Oceanography, EarlyView.
ABSTRACT Marine ecosystems are experiencing warming events in various regions of the world. Thus, many fish species and populations are now being impacted by the warmer water temperature conditions. Previous studies have reported temperature‐dependent sex determination (TSD) in various fish species.
Junichi Iijima, Akinori Takasuka
wiley   +1 more source

Marine copepods and solar radiation

, 2014
Ultraviolet radiation (UVR) has an overall negative effect on zooplankton. The direct effects (i.e., when the individual is exposed to UVR) include mortality due to DNA damage, and changes in feeding, reproduction and respiration. The effects can also be
Rodrigo, Gonçalvez,, Hylander, Samuel,
core  

Vectors and Vector‐Borne Diseases: Biology, Epidemiology and Integrated Control Strategies

Journal of Applied Entomology, EarlyView.
ABSTRACT Vector‐Borne Diseases (VBDs), transmitted by arthropods such as mosquitoes, ticks, fleas and sandflies, represent a significant threat to global health. These diseases can be caused by a variety of pathogens, including bacteria, viruses, protozoa, and helminths.
Roberta Rinaldi, Carmen Scieuzo, Federica De Stefano, Luca Masucci, Patrizia Falabella   +4 more
wiley   +1 more source

Interannual Variation in the Zooplankton Community of the North Adriatic Sea under Short-Term Climatic Anomalies

Diversity
Zooplankton are a pivotal component of the pelagic community, and their abundance and distribution are often strongly dependent on environmental conditions at sea. However, climate change can pose significant challenges to planktonic organisms. Therefore,
Samuele Menicucci, Andrea De Felice, Ilaria Biagiotti, Giovanni Canduci, Ilaria Costantini, Antonio Palermino, Michele Centurelli, Iole Leonori   +7 more
doaj   +1 more source

Bioaccumulation of methylmercury in a marine copepod

Environmental Toxicology and Chemistry, 2016
Abstract   Methylmercury (MeHg) is known to biomagnify in marine food chains, resulting in higher concentrations in upper trophic level animals than their prey. To better understand how marine copepods, an important intermediate between phytoplankton and forage fish at the bottom of the food chain ...
Cheng-Shiuan, Lee, Nicholas S, Fisher
openaire   +3 more sources

Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not the skeletal muscle of the basking shark (Cetorhinus maximus)

Journal of Fish Biology, EarlyView.
Abstract Fewer than 50 of the over 30,000 extant species of fishes have developed anatomical specializations facilitating endothermy in specific body regions. The plankton‐feeding basking shark (Cetorhinus maximus), traditionally classified as an ectotherm, was recently shown to have regionally endothermic traits such as centralized red muscle (RM ...
C. Antonia Klöcker, Axel Schlindwein, Martin C. Arostegui, Ingrid M. Bruvold, Joel V. Wernström, Montserrat Martin‐Armas, David W. Sims, Nicolas Straube, Andreas Altenburger, Claudia Junge   +9 more
wiley   +1 more source